US1325501A - Igwitiosr-timek - Google Patents

Description

E. BJACOBSON. IGNITION TIMER.

APPLICATION FILED FEB. 19, l9l9.

Patented Dec. 16, 1919.

11v VENTOR, 0 AMW fiejmwasam A TTO Y WITNESSES W 221,, MCMU uivrrun STATES PATENT OFFICE;

EDWARD B. JACOBSON, OF PITTSFIELD, MASSACHUSETTS, ASSIGNOR TO 3' AND B MANU- FACTURING COMPANY, OF PITTSFIELD, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

IGNITION-TIMER.

'Applicationfiled February 19, 1919. Serial No. 278,046.

To all whom it may concern.-

Be it known thatl, EDWARD n a citizen of the United States, residing at Pittsfield, in, the county of Berkshire and tain new and useful Improvements in Ign1-. tioneTimers, ofwhich, the xfollowlng 1s a,

State of Massachusetts, have invented cerspecification.

' structure and operr-ition ofthe wiper or contactor, which, successively establishes circuit with,. the provision of,- improved means for eled by the contractor: i I

connection with the several terminal sectors in the casing, and also, in eomblnation thereautomatically, lubricating the course trav- Referring to the accompanying drawings,

. Figure 1 is a vertical section of an ignition timer embodying my present invention in its.

, preferred form and operatively mounted upon acam-shaft; Fig, 2, a face view of the same, the front portion of the housing being cut away; Fig. 3, a front end view of the rotor portion; Fig. 4, a cross-sectional view of the same; Fig. 5, a detail view of one of the valve hearings in the lubricating portion of the'rotor; and, Fig. 6, a crosssectional'view showinga. modified form of the lubricating portion of the rotor, the remaining or contactor portion being cut away. v l v The mechanism herein illustrated 1s designed for use 1n connect1on with a fourcylinder explosive engine having a' geardriven cam-shaft operated by the mam en-,

gine shaft, ,but, itshouldbe understood, however, that myainvention is susceptible of application, with slight modification, to motors having any othernumber of explosion cylinders, and maybe otherwise mounted and driven. a a

This invention ,mayjfbe adapted to any suitable form of housing or. casing, the easing, 1 herein illustrated "being adjustably mounted on the front of the engineghousing 2 and arranged to inclose thefrontend of a cam-shaft 3, which .is preferably: eared to the main engine shaft (not shown,- and extends through asuitable opening 1n the.

wall of the engine housing,

The rear end of the casing 1 is open and B. Jameson,

seated in a'circular recess 4 provided-on the face of the engine houslng 2, SELlCl recess being adapted to prevent eccentric displace-,

ment of the casing. Forward displacement of the casing is prevented preferably by a spring clamp 5 removably secured at its rear end to a stud or bolt 6 fixed to the wall of the engine housing 2, and engaging at its opposite end the outerextremity of the reduced forward extension of the front of the casing, which has a central depression to receive a boss 7 provided on; the clam 5. Rotary movement of the casing for regu at-, ing the time of ignition is controlledby a lateral arm 8 exteriorly mounted on the cas ing and provided with a bearing 9 to receive a control-rod (not shown). 1

Within the casing 1 is an insulation ring 10 provided at regular intervals with arcu uate contacts 11, 11, which are embedded on its inner rim and suitably, connected to se arateterminals'12, 12, etc, arranged on t e outside of the casing 1, forconnection with the primary circuit of separate-induction coils. I

Mounted to rotate with the shaft 3 within the casing 1 is a metallic carrier 13 in the form of a sleeve which is normally secured against axial movementon the shaft by a transversely arranged removable pin 14 projecting through a suitable opening in the shaft and extending at one of its ends into a slot 15 provided on the outer rim of the carrier.- The pin 14 is secured against endwise displacement by a cup washer 16 fitted over the outer end of the carrier and inclos- 111g vthe exposed end of the pin 14, the reduced outer end 17 of the shaft bein proiected through the cup washer 16 an suitably threaded to receive a pair ofnuts 18,

19, which are employed in conjunction with a flat washer 20, carried-0n the reduced end of the shaft and engaging the face of the cup washer, to secure the latter in position.

The carrier 13 is provided at opposite points on its periphery witha fair of fixed metallic arms 21, 22, arrang in parallel relatiomto each-other in the plane of the insulation ring 10., Said arms are extended --n1 ioppositedirections' toward the insulation .ring 10, and into positions adjacent thereto,

then respective outerl ends being arcuate in outline l to aflr'ord "am; even clearance at" all points between their faces and the inner Specification of Letters Patent. I P t t De 1 19 rim of thering 10. One of said arms 21 is arranged to carry at its outer end amovable "'c ontactor 23 for slidab'ly engaging the': in

ner rim""oi""'t'he insulation ring"10,"the outer end of the contactor belng arcuate 1n outline to conform to the outline of the ring 10."

The contactor referablv consists of a rectangular block of steel adapted to move lengthwise in a slotofthe same dimensions provided transw'ersely 1n the outer end of the, contact-arm21 and, 15 provided ,Wltll a stem 24-,extendingv rearwardly-into acorree spending-bore 25 pIOYlClGCl lengthwise 1n the body ofthe contact-arm and communicating 15 witlrsaid slot at the outerrend. Said stem 1 24 has apreduced portion 26 which extends,

j; through a suitable. opening; provided in the .rear. Lwa1l27 of the chamberformed by the bore Y25 and beyond said wall and carries on its, rear extremity in, the frear of the contactarm 21 a removable taper-pin 28 driven.

through a suitable transverse opening pro- ,vided in said reduced-portion 26, said pin,

being adapted to engage the real-face of the contact-arm at the limit of forward move-v ,mentof the ,contactor23. ,Mounted on the a The remaining arm or lubricatorr22 of the law reduced-portion 26 of thestemin tl'iebore 25' is anexpansion spring 29 operating to, ,urge the contactor 23 forward, lnto constant engagement with the insulation ring 10.

carrier is provided lengthwise with a central bore form ng. a well 30, communicating with the'exterior at the rear end ofithe arm and extending well forward into the body of the ,,arm,: the forward endof the well commumduced orifice 31 through thefrontwall of a thewell. V The rear end of thewell 3 is nor-,

eating with the, exterior by means lof a remalljy closed bya removablescrew 32 .which engages a correspondmg thread provided on the. wall of the well at) this point. The well .30 is adapted to be packed with ansuitable lubricatin substance, vsuch/as IlOIlflllid oil, .which islntroduced' at the rear end by removing the screw 32 for the purpose, and is forced out by, centrifugal action through the orifice 31.1 in reduced quantities when the car- ,1 rier 13 is inmotion, against the inner rim -,Of.tll 8-1I1Sllllt101l ring for lubr cating the;

' path of the contactor 23. The quantity of .lubricantreleased bythe orifice 31;is;con-

I trolled preferablyby ,a needle-valve 33 ar- I "Forwardmovement-ofranged within. the well 301in=a1inement .withthe orificejand movably mounted upon suit- .i J I able bearings, in the. form of perforate disks 34, 34, arranged inzspaced parallel relation,

withintheQwell. w at the; valve, by centrifu'gal' .action, while the; carrier 13. is in 4 motion, is yieldingly opposed by an expan: 1:

.sion sprmg 35 mounted on thevalve and dis-r : posedbetween therhearings 34, 34,5 the rear end of. the spring being opposed to, the face of a fixed collar 36 carried on the valve stem.

spring 35 designed to exert sufficient force under normal speeds of the carrier to prevent the valve from completely closing the orifice 31, and in suchmanner as to permit an adequate amountof lubricant to be released for maintaining proper lubrication of the traveled surface of the insulation ring 10 and contacts 12, 12,- etc. The given posltion of the disk bearings 34, 34, within the well is preferably maintained by removable spacing rings 87 38, engaging the side walls of the well;

In the modified form of the lubricating portion of the rotor, ilh strated in Fig; 6, I have provided a hollow plunger 39movably mounted in the well 30 and having a reduced jforward extension 40 arranged to project through a suitable opening in the front wall I of the arm 22, saidplunger and extension beng provided withan absorbent core 41 of felt or, other suitable material adapted to distribute the lubricant placed in the well upon thehtraveled surface of the ring 10, said plunger ertension 40 being arranged to move forward nto engagement therewith under the forceexerted by an expansion spring 42 withinthe-well.

Ic1aim:. H 1. In an ignitiontimer," the combination ,witha casing and contact-elements mounted in the casing, ofa rotary portion mounted to qmove inithercasing and including a carrier, an arm provided on the carrienfor successively establishingcontact with the contact- ,elements,,and a separate arm provided on the.carrier for carrying a lubricant and for ,jdistributing the lubricant on the contactelements;

a 2.11:; an ignition timer, thecombination with a casing and contactelementsmounted in the casing, of a rotary portion mounted with a casing and contact-elementsmounted inthc .casing,.ofa rotary portion mounted to move In the casing and Including-a carrler, and 'a pair of arms earned on the carrier, a sprmg-pressedcontact carriedby one ,ofthe arms. and adapted to success-ively contact with the;contact-elen,1ents in the casing, fand; the'other vof'tthc arms having means for .ca'rrying-and distributinga lubricanton said contact eleme ntsr 1r .1: .p

.;E4. ,In an ignition timger, the combination with a casingand; contactqelements mounted in the casing; refa rotary portion mounted to inove in the casing and comprising a carrier; a pair of arms rovided on the carrier into-the chamber for introducing the lubri- 10 cant, and a separate opening communicating from the chamber with the exterior in the direction of the contact-elements; and a valve Within the chamber for regulating the flow of the lubricant through said last-described opening. v 15 In testimony whereof I hereunto aifix my signature in the presence of two Witnesses.

EDWARD B. J AGOBSON.

Witnesses JNO. J. Wl-IITTLESEY,

LE Roy E. SHAW.

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