US2088463A - Elevator system - Google Patents

Description

July 27, 1 937. c. F. CARNEY ET AL. 2,088,463

r ELEVATOR SYSTEM I Filed May 25, 1955 3 Sheets-Sheet 2 /Z-/ 42 Lax M -WW- Barton: Limz'z ir'h J 33 30 UX3 WHO Charles 7 Gar/26y and Patented July 2?, 1937 Y 2,088,463

UNETE STATES l '1 Ql 'i' lfilil ELEVAJI OR SYSTEM Charles F. Carney, Chicage, ill, and Emanuel M. Heiden, Brooklyn, N. 1%, assignors to Westinghouse Electric Elevator Company, Chicago, ill, a corporation of Illinois Application May 23, 1935, Serial No. 22,992

23 Claims. (Cl. 1'77336) U111 invention YGIEUJGS, ally, to electric Accordingly, our invention is disclosed in the elevators and it has particular relation to control embodiment hereof shown in the accompanying nd S a ys emh refordrawings and comprises the features of con- Wilsn night elevator ce is p ov ded, t is struction, combination of elements and arrangedesirable to reduce the required travel of an element of parts which will be exemplified in the 5 vator car to answer a call to a minimum. In construction hereinafter set forth, and the scope the past, when a call was registered in a down of the application of which will be indicated in direction at an upper floor and the elevator car the appended claims. was at the bottom terminal or a lower floor, it For a more complete understanding of the has been IRCQSSQIY for i110 Ope ao t0 pa s t e nature and scope of our invention, reference may 10 floor in an up direc ion where the passenger be had to the following detailed description, is waiting and approach. it in the down direc-- taken in connection with the accompanying tion, in order to cancel the call and to energize drawings, in which:

the appropriate hall lantern. It is obvious Figure 1 illustrates diagrammatically the arthat such operation involves considerable lost rangement of an elevator car in shaft; motion and delay in the operation of the eleva 2 illustrates the layout of a floor selector tor system. drive which may be used in conjunction with It is, therefore, an important object of our our invention; invention to provide, in an elevator system, for Figs. 3 and 4 illustrate diagrammatically the indicating to a passenger who has registered a circuit connections which may he used in prac- 20 call for one direction that the registered call will tising our invention, it being understood that be answered by an elevator car as it appoaches the circuits shown in Fig. 4 are a continuation the floor where the call is registered from the of those shown in Fig. 3; and opposite direction. Fig. 5 is a layout illustrating the relative loca- Another important object of our invention is tion of the various contact members and their 25 to provide for indicating, while a car is apoperating windings for the various switches and preaching a door in one direction, that it will relays illustrated in Figs. 3 and l. leave the floor in an opposite direction. q

A further object of our invention is to provide General dewnptwn for lighting the hall lantern corresponding to According to our invention, the elevator sys- 9 the next direction of travel of an elevator car tern is provided with the usual starting and acas it approaches a floor in the opposite direc-- celerating circuits. The motor which is protion. vided for operating the elevator car in the shaft Still another object of our invention is to is arranged to be controlled by means of a provide for reversing the direction preference de- Ward-Leonard control system in which the our- 35 vices in an elevator system as the elevator car rent flow through the field winding of the geneapproaches a floor in one direction by operating rater is varied and reversed, as is the customary the master switch in the ear to a position corpractice. responding to the next direction of travel oi the At each. floor up and down hall buttons car while it is still approaching the: floor in the} are provided for permitting passengers to regis- 40 original direction for the purpose or canceling ter calls in either direction. In order to indithe registered call and to indicate that the car cate that the elevator car is to respond to a regiswill answer the registered call. tered call, each floor is provided with up and A still further object of our invention is to down hall lanterns, the lanterns being enerprovide, in an elevator system, for canceling a gizable to indicate that the car will answer the 45 call registered for one direction 01 travel as the call corresponding to the hall lantern that is elevator car approaches a floor where the call energized.

registered in the opposite direction. The elevator car is provided with a manually- Generally stated, the object of our invention p ra l master sw having three p s tio s,

is to provide a control and signalling system for the center position being a stop position, and 50 an elevator car which shall be simple and efii the extreme positions being, respectively, up cient in operation, and which may be readily and and down positions. When the master switch economically manufactured and installed. is operated to either the up or down posi- Other objects of our invention will in, part be tion, up or down preference switches will be obvious and in part appear hereinafter. operated, depending upon the position of the 5 master switch, for the purpose of determining which hall lantern will be energized as the car approaches a floor where a call is registered, and also which will permit the canceling of a call. The car is also provided with annuneiators which indicate to the operator the floor at which a call is registered and the direction for which it is registered.

Assuming that a call is registered for the down direction at the third floor while the elevator car is at the lower terminal, the corresponding annunciator in the car will be operated, indicating to the operator the floor at which and the direction for which the call has been registered. In order to answer the call, the operator closes the doors and gate and operates the master switch to start the car upwardly. As the car approaches the floor where the call is registered, the operator centers the master switch, thereby initiating a slow-down sequence which will cause the car to be stopped at the floor where the call is registercd.

The operator not only switch to the stop position, but also momentarily places it in the down position. This momentary operation of the master switch. reverses the direction preference switches so that, as the car approaches the third floor in the up di-- rection, the down lantern at the third floor will be energized and lighted. T e passenger at the third floor is then informed that his call will be answered. In addition, the down call is canceled.

Since the master switch is only momentarily operated to the reverse position, no other operation results, provided that it is immediately centered before the car steps. if the master switch is not reversed, then the hall lantern correspond ing to the up direction at the third floor will be energized, and the call will not be canceled until the car is started from the third floor in the down direction. With a little practice, the operator will be readily enabled to efiect the energization of the down hall lantern while the car is approaching the floor where a call is registered in the up direction, so that a minimum of delay will be involved in answering isolated calls.

centers master Description of apparatus Referring now particularly to Fig. l of the drawings, it will be observed that the reference character I designates, generally, an elevator car which may be supported by means of a cable 5% passed over a sheave and balanced by a suitable counterweight CW. The sheave may be driven by means of a suitable motor M, and a brake B is provided for stopping further rotation of the sheave 3 as soon as the motor M is deenergized. In order to control the operation of the signalling system associated with the elevator, a floor selector, shown. generally at t, may be provided having a motor ll which may be arranged by any suitable means to drive a brush carriage 6.

The layout of the floor selector #5 is schematically illustrated in Fig. 2 of the drawings. it will be observed that the floor selector l is provided with down call-canceling segments i l, 2i, 3!, 4! with which a brush it is arranged to en-- gage. Up call-canceling segments l2, 32, 42 are provided with which brush is arranged to engage. Down hall lantern segments iii, 33, 43 are provided with which a brush is arranged to engage. Up hall lantern segments M, 24, 34, M are provided with which a brush aosaace ill is arranged to engage. It will be observed that the brushes iii, ill], 38, ll are carried by the brush carriage 6, which, it will be understood, is operated by the motor 5 in either an up or a down direction in accordance with the movement of the car i in the shaft.

As illustrated in Fig. l of the drawings, the car i is provided with a slow-down inductor switch l3. having normally closed contact mem-- bers El and E22, and a landing inductor switch I" having normally closed contact members Fl and F22. When the operating windings of the inductor switches E and F are energized, no operation takes place until the contact members thereof are moved into proximity with inductor plates located along the sides of the hatchway in which the elevator car i operates. Thus when the operating winding of the slowdown inductor switch ii. is energized as the car i approaches third floor, and the contact members Eli are moved into proximity with inductor plate SUE, they will be opened and will remain open as long as the operating winding remains energized. In like manner, if the car i approaches the third fiooz. n a down direction, and the operating 'indlng energized, the contact members E2 will be opened when they come into proximity with inductor plate 313E. In like manner, the con tact members Fl and F2 of the landing inductor switch P will be opened as they come into proxiinity with the inductor plates SUF and BDF, respectively, as the car i approaches the third floor from either the down or the up direction.

It will be understood that inductor plates. are provided individual to each of the other iloors may be necessary for effecting the slowdown sequence and landing operation of the olevator car i.

In order to signal to the operator that a call has been registered at a particular floor, a bani; of annunciator lights I is provided. The circuit connections to the lights of the annunciator bank l are illustrated in Fig. i of the drawings, and will be described in detail hereinafter.

The elevator car I is also provided with a manually-operable master switch MS, which may be actuated by the operator for starting the car i in either direction and for stopping it at any floor. It will be observed that the center position of the master switch MS is a stop position, and that the extreme positions thereof are, respectively, up and down positions. The functioning of the master switch MS will be set. forth in detail hereinafter.

Referring more particularly to Figs. 3 and i of the drawings, it will be observed that the motor M is provided with a main field winding MP that is connected for energization between energize-cl conductors Li and L2. Line switches Lsl and LS2 are provided, as illustrated, for connecting the conductors Li and L2 to a suitable source of direct current (not shown). A generator G is provided having a generator series field winding GSF connected in series circuit relation with its armature and the combination being connected across the armature of the motor M.

The generator G is provided with a generator field winding GF, the current through which may be reversed by means of up an dowir reversing switches U and D, respectively. The

reversing switches U and D are controlled by means of up and down master switches US and 138, respectively, which are directly controlled by means of the manually-operable master switch MS. The master switch MS also controls up and down preference switches UX and DX which, as will appear hereinafter, are

provided for eifecting the energization of the desired hall lanterns and for canceling calls that have been registered.

In order to accelerate the motor M, a. resistor R is provided which is initially connected in series circuit relation with the generator field winding GF. A speed switch V is provided with contact members which are connected to shortcircuit the resistor R in order to provide maximum excitation to the generator G for applying maximum operating voltage to the armature of the motor M.

The operating windings of the slow-down and landing inductor switches E and F are illustrated together with a holding relay 1-1, which is arranged to maintain the operating windings of the inductor switches energized until a complete sequence of operations in stopping the car i has been performed. In order to cleenergize the operating windings of the inductor switches E and F and of the holding relay H, a reset relay M is provided which is arranged to be operated when either of the reversing switches U or if) is operated.

In order to register calls for the up direction, hall buttons IU, 2U, 3U are provided which are arranged to operate, respectively, up callstoring relays EUR, EUR, 3UR. In like down hall buttons 2D, 3D, 5D are provided which are arranged, respectively, to effect the operation of down call-storing relays 213B, 3BR, iDR. As illustrated, the calltoring relays are of the two-winding type, one winding being the main operating winding and the other winding being a canceling winding, and so arranged that, when energized, the flux generated thereby opposes the flux generated by the main winding, thereby permitting the contact members of the relays to be opened. 7

Passengers at the various floors are informed that the calls which they have registered will be answered by means of up hall lanterns lUL, 2UL, .sU'L for the up direction, and by means of down hall lanterns ZiDL, SDL, QDL for the down direction.

As set forth hereinbefore, a bank of annunciators l is provided for informing the operator that a call has been registered at a particular floor. The annunciators may comprise incandescent lamps. Fcr the up direction, lamps iUA, ZUA, .iUA are provided, and for the down direction, lamps EDA, EDA, ADA are provided.

Description of operation It will be observed that the brush carriage 6 of the floor selector 4 is illustrated in 2 as being at the third floor, in which position it will be located when the car i is at the third floor. The circuit connections that will be made at this? time are illustrated in Fig. l, where the brushes carried by the brush carriage 6 are also illus trated as being at the third-floor position. How ever, it will be understood that initially when the car l is at the first floor, the brush carriage and brushes carried thereby will be located in the first-floor position with the brushes in engagement with their corresponding segments.

The line switches LS! and LS2 are closed, thereby connecting the conductors Li and L2, to the source of direct current. Since the car i is assumed to be at the bottom terminal, the up preference switch UK will immediately be energized.

Ll, top limit switch 8, D32, DXZ, UX, L2

,Also up hall lantern IUL will be lighted to indicate that the car is to leave the lower terminal.

Ll, IUL, segment l3, brush 3t, U223, Vt, L2

With the car I at the first floor, it will be assumed that a call is registered at the third floor for the down direction. This call is registered by the passenger depressing the down hall button 313. As a result, the down call-storing relay BBB. is energized.

Li, 3D, 3BR, L2

Ll, 3DA, 3DR2, L2

The operator now closes the door and gate and operates the master switch MS to the up position. The up master switch US is then energized over an obvious circuit, and as a result, the up reversing switch U and the reset relay M are energized.

Ll, USI, Fl, D5, U, M, door and gate safety contacts, L2

At contact members U5, an obvious holding circuit is completed for the operating windings of switch U and relay M. The generator field winding GE is then energized to cause the generator G to apply the proper voltage to the motor M for operating the elevator car I in the up direction.

Ll, U2, GF, U3, R, L2

The brake B is released by the closing of contact members Ufl and the car i moves upwardly at reduced speed.

A further result of the energization of the up reversing switch U is to effect the energization of the speed switch V.

Li, U4, El, V, L2

The resistor R is then shcrt-circuited and full excitation is applied to the generator G. Consequently, full voltage is applied to the motor M and it operates at maximum speed to move the car i upwardly. A further result of the operation of the speed switch V is to open the previously traced circuit for the up hall lantern IUL, and it is extinguished.

It will be understood that sufficient time elapses between the operation of the up r versing switch U anclthe operation of the speed switch V to permit the necessary accelerating sequence to take place for the motor M.

As the car passes the second floor, the operator centers the master switch MS and the holding relay H is then energized.

Ll, MS, I-I, Ml, L2

At the same time, the operating winding for the slow-down inductor switch E is energized in parallel circuit relation with the operating winding of the holding relay -1. It will be observed that the holding relay H, at contact members HI, completes a self-holding circuit so that further operation of the master switch MS does not affect it or the energization of the operating windings of the inductor switches E and F.

As the contact members El of the slow-down inductor switch E are moved into proximity to the inductor plate 3UE, they are opened, and as a result, the previously traced energizing circuit for the operating winding of the speed switch V is opened. This switch is deenergized. As a result, the resistor R is again inserted in series circuit relation with the generator field winding GF and reduced voltage is applied to the motor M, causing the elevator car I to be operated at a reduced speed. A further result of the deenergization of the speed switch V is to effect the energization of the operating winding of the landing inductor switch F.

LI, HI, V3, F, Ml, L2

The operator not only centers the control switch as set forth, but also momentarily moves it to the down position. The down master switch DS is then momentarily energized over an obvious circuit. As a result of the energization of the down master switch DS, the previously traced energizing circuit for the up preference switch UK is opened, and it is deenergized. The down preference switch DX is then energized,

Ll, bottom limit switch 9, USZ, UXZ, DX, L2

It will be recalled that the brush carriage 6 is moving upwardly with the car I. Brush 40 engages down hall lantern segment 34, and, due to the fact that the down preference switch DX is energized, the down hall lantern 3DL is lighted.

Ll, 3DL, segment 34, brush 49, DX3, V4, L2

As soon as brush 10 engages down call-canceling segment 3|, the canceling winding 3DRC of the down call-storing relay 3DR is deenergized, and as a result, the contact members of this relay are opened.

Ll, 3DRI, 3DRC, segment 3|, brush l0, DXl, V2, L2

In the event that the operator did not momentarily operate the master switch to the down position, as just described, the brush 30, on engaging the up hall lantern segment 33, would have completed a circuit for lighting the hall lantern 3UL. This would indicate to the passenger who had depressed the down hall button 3D that the car would stop at the third floor, but would continue in the up direction. In addition, the call would not be canceled, unless the car left the third floor in the down direction. It will be obvious, therefore, that a minimum of confusion. will result when the operator momentarily operates the master switch MS to the down position as the car approaches the third floor in the up direction, and the passenger will be informed that the car, although moving in an up direction, will answer his call.

Since the car is still moving in the up direcr tion and the master switch MS is only momentarily operated to the down position, no further operation than that described hereinbefore will take place as a result of this reversal of the master switch MS. It will then be understood that the elevator motor M will not be plugged, and operated in the reverse direction when the master switch MS, under these conditions, is momentarily reversed.

The elevator car I, continuing movement in the up direction, causes the contact members Fl of the landing inductor switch F to come into proximity to the inductor plate 3UP. These contact members are then opened, and as a result, the up reversing switch U and the reset relay M are deenergized. The generator field winding GE is deenergized and the brake B is applied. The reset relay M at contact members Ml opens the energizing circuits for the operating windings of the inductor switches E and F and the holding relay H. They are then deenergized.

The passenger having entered the car, the operator closes the door and gate and operates the master switch MS again to the down position. The down master switch DS is then energized, and as a result, the down reversing switch D and the reset relay M are energized.

Ll, DSI, F2, U6, D, M, door and gate safety contacts, L2

At contact members D5 a holding circuit is completed for the operating windings of switch D and relay M. The generator field winding is then energized in a reverse direction.

Ll, D3, GF, DI, R, L2

At contact members D2 a circuit is completed for releasing the brake B and the car I is then operated in the down direction at slow speed.

The energization of the down reversing switch D also effects the energization of the speed switch V, and the resistor R is again shortour invention. It will be understood that the limited number of floors shown and described herein is for illustrative purposes only.

Since certain further changes may be made in the foregoing construction and different embodiments of the invention may be made without departing from the scope thereof, it is intended that all matter set forth in the foregoing description or shown in the accompanying drawings shall be interpreted as illustrated and not in a limiting sense.

We claim as our invention:

1. In a system for operating an elevator car past a plurality of floors, in combination, manual switch means in the car operable to positions corresponding to either direction of travel and to a stop position, up and down hall lanterns individual to each floor, means responsive to the operation of said switch means while the car is travelling in one direction for initiating a slowdown sequence to stop the car at a floor, and means responsive to the operation of said switch means to the position opposite to that corresponding to the direction in which the car is traveling to effect the energization of the hall lantern at said floor corresponding to the other direction of travel during said slow-down sequence.

2. In a system for operating an elevator car past a plurality of floors, in combination, manual It will be obvious (ill switch means in the car operable to positions 75 corresponding to either direction of travel and to a stop position, up and down call registering means individual to each floor, means responsive to the operation of said switch means while the car is travelling in one direction for initiating a slow-down sequence to stop the car at a iloor where a call is registered for the opposite direction, and means responsive to the momentary operation of said switch means to the position opposite to that corresponding to the direction in which the car is travelling for cancelling said registered call.

3. In a system for operating an elevator car past a plurality of floors, in combination, manual switch means in the car operable to positions corresponding to either direction of travel and to a stop position, up and down preference means disposed to be selectively operated by said switch means for establishing circuits corresponding to the direction of car travel, and means responsive to the operation of said switch means to said stop position for initiating a slowdown sequence to stop the car at a floor, said preference means being responsive to the operation of said switch means to the position opposite to that corresponding to the direction in which the car is travelling for establishing circuits corresponding to the opposite direction of travel as the car continues to approach said floor.

4. In a signaling system for an elevator car operable past a plurality of floors, in combina tion, a hall lantern individual to each floor and to each direction of car travel, and means for energizing the hall lantern at a floor correspcnding to the proposed next direction of operation of the car when the car approaches said floor from an opposite direction.

5. In a system for operating an elevator car past a plurality of floors, in combination, a hall lantern individual to each floor and to each direction of travel, direction preference means for establishing circuits to energize said hall lanterns corresponding to the direction of travel of the car, and means for reversing said direction preference means while the car is approaching a floor in one direction to effect the energization of the hall lantern at said floor corresponding to the other direction of travel as the car continues to approach said floor.

6. In a signaling system for an elevator car operable past a plurality of floors, in combination, an up and a down hall lantern individual to each floor, and means for energizing the hall lantern at a floor corresponding to the next direction of operation of the car while it approaches said floor from an opposite direction.

7. In a system for operating an elevator car past a plurality of floors, in combination, up and down hall lanterns individual to each floor, manual switch means in the car for controlling the operation thereof, and up and down preference means disposed to be selectively operated by said manual switch means for establishing circuits to energize said hall lanterns corresponding to the direction of travel of the car, said preference means being responsive to a further operation of said manual switch means to a position opposite to that corresponding to the direction in which the car is traveling while the car is approaching a floor in one direction for reversing said preference means to effect the energization of the hall lantern at said fioor corresponding to the other direction of travel as the car continues to approach said floor.

8. In a system for operating an elevator car past a plurality of floors, in combination, up and down hall lanterns individual to each floor, manual switch means in the car operable to positions corresponding to either direction of travel and to a stop position, up and down preference means disposed to be selectively operated by said switch means for establishing circuits to energize said hall lanterns corresponding to the direction of car travel, and means responsive to the operation of said switch means to said step position for initiating a slow-down sequence to stop the car at a floor, said preference means being responsive to the operation of said switch means to the position opposite to that corresponding to the direction in which the car is travelling to effect the energization of the hall lantern at said floor corresponding to the other direction. of travel as the car continues to approach said floor.

9. In a signaling system for an elevator car operable past a plurality oi floors, in combination, up and down hall lanterns individual to each floor, means for signaling to the car that a call has been registered at a floor for one direction of travel, and means for energizing the hall lantern individual to the direction for which said call is registered regardless of the direction in which the car approaches said floor.

10. In a signaling system for an elevator car operable past a plurality of floors, in combination, up and down hall lanterns individual to each floor, means for signaling to the car that a call has been registered at a floor for one direction of travel, means for energizing the hall lantern individual to the direction for which said call registered regardless of the direction in which the car approaches said floor, and means for cancelling said call regardless of the direction in which the car approaches said floor.

11. In a signaling system for an elevator car operable past a plurality of floors, in combination, up and down hall lanterns individual to each floor, means for signaling to the car that a call has been registered at a floor for one direction of travel, means for energizing the hall lantern at said floor individual to the direction of approach as the car approaches in a direction opposite to that for which the call is registered, and means for energizing the other hall lantern at said floor to indicate that the car will answer the registered call.

12. In a signaling system for an elevator car operable past a plurality of floors, in combination, up and down hall lanterns individual to each floor, means for signaling to the car that a call has been registered at a floor for one direction of travel, means for energizing the hall lantern at said floor individual to the direction of approach as the car approaches in a direction opposite to that for which the call is registered, means for energizing the other hall lantern at said floor to indicate that the car will answer the registered call, said call.

13. In a signaling system for an elevator car operable past a plurality of floors, in combination, means for signaling to the car that a call has been registered at a floor, up and down hall lanterns individual to each floor, direction preference means disposed to effect the energization of said hall lanterns corresponding to the direction of travel of the car, and means for reversing said direction preference means While the car is approaching from one direction, a floor where a call is registered for the opposite direction, to

and means for cancelling effect the energization of the hall lantern corresponding to the direction in which the call is registered.

14. In a signaling system for an elevator car operable past a plurality of floors, in combination, means for registering a call at any of the floors and signaling to the car that the call has been registered, up and down hall lanterns indi vidual to each floor, direction preference means disposed to effect the energization of said hall lanterns corresponding to the direction of travel of the car, and means for reversing said direction preference means while the car is approaching from one direction, the floor where a call is registered for the opposite direction, to effect the energization of the hall lantern corresponding to the direction in which the call is registered and cancelling the registered call.

15. In a system for operating an elevator car past a plurality of floors, in combination, means for signaling to the car that a call has been registered at a floor, up and down hall lanterns individual to each floor, manual switch means in the car for controlling the operation thereof, and up and down preference means disposed to be selectively operated by said manual switch means for effecting the energization of said hall lanterns corresponding to the direction of travel of the car at floors where calls are registered, said preference means being responsive to a further operation of said manual switch means to a position opposite that corresponding to the direction in which the car is travelling while the car is approaching a floor in one direction where a call is registered for reversing said preference means to effect the energization of the hall lantern at said floor corresponding to the other di-- rection of travel as the car continues to approach said floor.

16. In a system for operating an elevator car past a plurality of floors, in combination, means for registering a call at any of the floors and signaling to the car that a call has been registered at any floor, up and down hall lanterns individual to each floor, manual switch means in the car for controlling the operation thereof, and up and down preference means disposed to be selectively operated by said manual switch means for effecting the energization of said hall lanterns and cancelling calls at floors where calls are registered, said preference means being responsive to a further operation of said manual switch means to a position opposite to that corresponding to the direction in which the car is travelling while the car is approaching a floor in one direction where a call is registered for reversing said preference means to effect the energization of the hall lantern at said floor corresponding to the other direction of travel and to cancel the registered call as the car continues to approach said floor.

17. In a system for operating an elevator car past a plurality of floors, in combination, means for signaling to the car that a call has been registered at a floor, up and down hall lanterns individual to each floor, manual switch means in the car operable to positions corresponding to either direction of travel and to a stop position, up and down preference means disposed to be selectively operated by said switch means for efiecting the energization of said hall lanterns corresponding to the direction of car travel, and means responsive to the operation of said switch means to said stop positions for initiating a slow-down sequence to stop the car at a floor where a call is registered, said preference means being responsive to the operation of said switch means to a position opposite to that correspond ing to the direction in which the car is travelling to effect the energization of the hall lantern at said floor corresponding to the other direction of travel as the car continues to approach floor.

18. In a system for operating an elevator car past a plurality of floors, in combination, means for registering a call at any of the floors and signaling to the car the registration of the calls, up and down hall lanterns individual to each floor, manual switch means in the car operable to positions corresponding to either direction of travel and to a stop position, up and down preference means disposed to be selectively operated by said switch means for effecting the energize tion of said hall lanterns and cancelling calls at floors where calls are registered, and means responsive the operation of said switch means to said stop position for initiating slow-down sequence to stop the car at a floor where a call is registered, preference means being responsive to the operation of said switch means to a position opposite to that corr sponding to the direction in which the car is travelling to effect the energization of the hall lantern at said floor corresponding to the other direction of travel and to cancel the registered call as the car continues to approach said floor.

19. In a system for operating an elevator car past a plurality of floors, in combination, manual switch means in the car operable to either an up or a down position, up and down master control means disposed to be selectively operated in accordance with the position of said manual' switch means, up and down reversing means disposed to be operated respectively by said up and down master control means, up and down hall lanterns individual to each floor, means responsive to the operation of said switch means while the car is travelling in one direction for initiating a slow-down sequence to stop the car at a floor, and means responsive to the operation of said switch means to the position opposite to that corresponding to the direction in which the car is travelling to effect the energization of the hall lantern at said floor corresponding to the other direction of travel.

20. In a system for operating an elevator car past a plurality of floors, in combination, manual switch means in the car operable to either an up or a down position, an up and a down master relay disposed to be respectively operated on operation of said manual switch means to the up or the down position, an up and a down reversing switch disposed to be respectively operated on operation of said up and down master relays for effecting the movement of the car in corresponding directions, an up and a down hall lantern individual to each floor, means responsive to the operation of said manual switch means while the car is travelling in one direction for initiating a slow-down sequence to stop the car at a floor, and means responsive to the operation of said manual switch means to a position opposite to that corresponding to the direction in which the car is travelling to effect the energizetion of the hall lantern at said floor corresponding to the other direction of travel.

21. In a system for operating an elevator car past a plurality of floors, in combination, manual switch means in the car operable to either an up or a down position, an up and a down master relay disposed to be respectively operated on operation of said manual switch means to the up or the down position, an up and a down reversing switch disposed to be respectively operated on operation of said up and down master relays for effecting the movement of the car in corresponding directions, said reversing switches on operation being disposed to complete self-holding circuits therefor, an up and a down hall lantern individual to each floor, means responsive to the operation of said manual switch means while the car is travelling in one direction for initiating a slow-down sequence to stop the car at a floor, and direction switch means disposed to be responsive to the operation of said manual switch means to a position opposite to that corresponding to the direction in which the car is travelling to effect the energization of the hall lantern at said floor corresponding to the other direction of travel.

22. In a system for operating an elevator car past a plurality of floors, in combination, manual switch means in the car operable to positions corresponding to either direction of travel of the car, an up and a down, hall lantern individual to each floor, means for initiating a slow-down sequence to stop the car at a floor, and means operable while said car is approaching said floor in one direction for effecting the energization of the hall lantern corresponding to the opposite direction of travel to indicate that the proposed next direction of movement of the car after it has stopped at said floor will be in the opposite direction.

23. In a system for operating an elevator car past a plurality of floors, in combination, manual switch means in the car operable to positions corresponding to either direction of travel of the car, an up and a down hall lantern individual to each floor, an up and a down call registering device individual to each floor, means for initiating a slow-down sequence While the car is travelling in one direction to stop the car at a floor where a call is registered by one of said call registering devices for the opposite direction, and means operable while said car is approaching said floor for effecting the energization of the hall lantern corresponding to the direction for which the call is registered to indicate that the proposed next direction of movement of the car after it has stopped at said floor will be in the direction for which the call was registered.

CHARLES F. CARNEY. EMANUEL M. HEIDEN.

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