US918505A - Wrench. - Google Patents

Description

W. E. BURNETT.

WRENCH.

APPLIOATION EILIID JAN. 22, 1908.

Patented Apr. 20, 1909.

2 SHEETS-SHEET 1.

INVENTIIIR= 9' L WITNESSES:

2m. A [DY/WM H15 ATTEIR'NEY W. E. BURNETT.

, WRENCH.

APPLICATION FILED JAN. 22, 1908.

. n R m m E v n T. M w H m R r m 5 Wm b m e l m A A m E W H n 05 a M i a 5 E 1 Q W 9 3 A UNITED STATES PATENT OFFICE.

WILLIAM E; BURNETT, OF ILION, NEW YORk, ASSIGNOR TO WYOKOFF, SEAHANS & BENEDICT, OF ILION, NEW YORK, A CORPORATION OF N EW YORK.

WRENCH.

Specification of Letters Patent.

Patented April 20, 1909.

Application filed January 22, 1908. Serial No. 412,156.

T 0 all whom it may concern:

Be it known that I, WILLIAM E. BURNETT, citizen of the United States, and resident of Ilion, in the county of I-lerkimer and State of New York, have invented certain new and useful Improvements in Wrenches, of which the following is a specification.

My invention relates to wrenches and is especially adapted for adjusting parts or in screwing in or backing out screws so situated that but a small area is available for manipulating the wrench and which are not easy of access by an ordinary wrench.

The wrench of my present invention was devised more particularly for adjusting screws in a typewriting machine, said screws being so situated that the manipulation of the wrench in adjusting said screws is ordinarily rendered very difficult, although it should be understood that the wrench is available for a great variety of uses.

The object of my invention is to overcome the difficulties heretofore encountered and. provide a simple and efficient wrench of the character specified.

To the above and other ends which will hereinafter appear my invention consists in the features of construction, arrangements of arts and combinations of devices to be ereinafter set forth and particularly pointed out in the appended claims.

In the accompanying drawings wherein like reference characters indicate corresponding parts in the different views, Figure 1 is a plan view of the wrench shown applied to a part to be adjusted thereby. Fig. 2 is a side elevation of the same. Fig. 3 is an enlarged detail top view of the wrench with the pivotally united arms thereof shown in alinement. Fig. 4 is a side elevation of the same. Fig. 5 is a fragmentary bottom view of the wrench with parts in section. Fig. 6 is a fragmentary bottom view of the wrench, the View being similar to that shown in Fig. 5 except that the parts are shown differently disposed in the two views. Fig. 7 is a fragrnentary side elevation of the wrench partly in section.

The wrench of my invention comprises an arm 1 pivotally connected by a shouldered screw 2 to a second arm 3. The arm 1 constitutes a handle by which the wrench may be manipulated and is bent at 4 so that that ortion of the wrench which constitutes the liandle is off-set relatively to the arm 3. The

arm 3 constitutes a stock-carrying arm and is perforated at 5 (see Figs. 3 and 7) to form a bearing to receive a portion 6 of a stock 7. The body of the stock forms a shoulder S which bears against the bottom face of the stock-carrying arm 3. The portion 6 which is coi'rtained in the bearing opening of the stock-carrying arm has a tapped opening for cooperation with a screw 9, the head ll) of which is enlarged and is adapted to bear against the upper end of the member 6 and to bear against the upper side of the stoch-carrying arm 3, thus connecting the two parts 7 and 9 which virtually constitute the stock and also connecting the stock to the stock-carrying arm so that said arm may rotate around the longitudinal axis of the stock. It will be observed that the axis of the stock is parallel with the axis of the shouldered screw 2 which pivotally unites the arms 1 and 3. The lower end of the stock is aperturcd at 11 to provide means for engaging the part to be adjusted which in the present instance is shown as a screw 12. As shown in Fig. 2, the rectangular head of the screw is seated within the rectangular opening ll in the stock so that a manipulation of the wrench is adapted to turn the screw as will hereinafter more clearly appear. The stock is formed with a ratchet wheel 13 for cooperation with a pawl 14 pivotally connected by a shouldered screw 15 to the stock-carrying arm 3. The pawl is provided with two engaging noses 16 and 17 on o posite sides of the pivotal center of the pawl and said pawl is also provided with a tail piece 18 having inclined faces 19 and 20. A cylindrical housing 21 is secured to the bottom of the st0cl -carrying arm 3 and extends longitudinally thereof and receives a plunger 22 and an expansion spring 23. One end of the spring 23 bears against the end of the housing indicated at 24 and the other end thereof bears against the plunger so as to force it into contact with the pawl 14. The construction is such that finger pressure exerted on either side of the tail piece of the pawl 14 will shift the apex 25 of the tail piece to one side or the other of the spring pressed. plunger 22 and the pressure exerted by the spring 23 through the plunger bearing on the inclined face 19 or 20 will force one or the other of the engaging noses 16 and 17 of the pawl into cooperation with the ratchet wheel 13. By these means the stock 7 may be caused to turn in either direction with the stock-carrying arm and they afford an independent movement of the arm in the opposite direction. The direction in which the stock is compelled to turn with the stockcarrying arm, as pointed out above, depends upon the adjustment of the pawl 14; that is to say, whether it be shifted by hand to bring the inclined face 19 or the inclined face 20 into cooperation with the spring pressed plunger 22 as will be clearly understood by a comparison of Figs. 5 and 6.

In Figs. 1 and 2 I have illustrated a typewriter key lever 26 carrying the screw 12 which is intended to cooperate with the universal bar 27 to actuate it on the depression of the key lever. The screws 12 are each designed to be adjusted up or down in order to regulate the action of the several key levers 26 on the universal bar 27. It will be understood that it is diflicult to gain access to these adjusting screws 12 as they are within the frame of the typewriting machine and are partly surrounded by various working parts of the typewriting machine. How ever, access may be attained to these screws from one side of the machine and the wrench may be inserted and placed in engagement with the screw to be adjusted. The stock may then be readily turned step-by-step in either direction, a back and forth or longitudinal movement of the handle within the small space available for the manipulation of the wrench being all that is required. In other words, whenever the handle is at an angle to the stock carrying arm a longitudinal movement of the handle alone is all that is necessary to turn the stock step-by-step.

From the foregoing description it will be seen that by my invention I have provided a simple and eilicient wrench for the purposes specified. It will also be understood that if necessary, and sufficient space is available for that purpose, the stock-carrying arm may, if desired, be given a complete revolution around the axis of the screw to be adjusted without interference from the stock or the arm 1.

What I claim and desire to secure by Let ters Patent, is

1. A wrench comprising two arms pivotally connected, one of said arms constituting a handle by which the wrench may be manipulated, a stock carried by the other of said arms, pawl and ratchet mechanism between the stockcarrying arm and said stock, and hand controlled means for changing the direction of effective engagement between the parts of the pawl and ratchet mechanism, longitudinal movements of the handle when it is at an angle to the stock carrying arm effecting a step-by-step rotative movement of the stock.

2. In a wrench, the combination of two arms pivotally connected, one of said arms constituting a handle and the other having a bearing opening therein and constituting a V stock-carrying arm, a stock which bears against one side of the stock-carrying arm and has a portion which is received in said bearing opening, a headed screw received in a tapped opening in the stock and the head of which bears against the opposite side of said stock-carrying arm, a ratchet Wheel on said stock, a pawl pivotedto the stock-carrying arm and cooperative with said ratchet wheel, said pawl having two engaging noses and a tail piece, and a spring-pressed plunger that is adapted to bear on one or the other side of said tail piece to maintain one or the other of said engaging noses in engagement with the ratchet wheel.

Signed at Ilion, in the county of Herkimer and State of New York, this twentieth day of January, A. D., 1908.

WILLIAM E. BURNETT.

Witnesses WILLARD GRAVES, WM. F. PARKER.

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