US1238912A - Locking device for cranks. - Google Patents

Description

e. H.V,H|LBERS. LOCKING DEVICE FOR CRANKS.

APPLICATION FILED DEC. 7. i916.

L 23% 9 L 2 Patented Sept. 4, 1917.

ISI 3 i (EL 4 22 L I sa ss 20 if E E 2 tessere.

Y y liable and ecient in use, and readily oper- 25 "nutren srafrns navrant ermee.

GEORGE H. EILERS, OIE' HOOPER, NEBRASKA.

Locmne nEvIcE Eon enanas.`

Patented Sept. L1, 1917.

` Application filed December 7,1916. serial no. 135,620.

To all whom it may concern:

Be it known that I, GEORGE HILBERs, a citizen ofthe United States, residing at ljlooper, in the county of Dodge and State of Nebraska, have invented certain new `and useful Improvements in Locking Devices'for Cranks, of which the following is a specication.

The present invention relates to improvements in locking devices for cranks.

The primary object of the invention is the provision of means whereby a crank canbe locked in any of its adjusted positions and held therein against undesired movement.

A. further object of the invention is the provision of means carriedby a crank and engaging a suitable support forthe `purpose of locking the shaft to which the crank is applied against any undesired rotation.

A further object of the invention is the provision of a device of the nature `above referred to, which Vwill be 'comparatively simple and inexpensive to manufacture, re-

ated.

the present invention resides in the novel features of construction, formations, combinations and arrangements of parts to be hereinafter more fully described, claimed, and illustrated in the accompanying drawing forming a part of the present application and in which:

Figure 1 is a side elevation of the invention' Fig. 2 is a top plan view thereof; and

Fig. 3 is a transverse sectional view taken on the line 3-3 of Fig. 2.

Referring to the accompanying drawing by corresponding characters of reference throughout the several views, the numeral 5 designates in general a portion of a frame or support in which is journaled a shaft 6.

This shaft 6 is mounted in a suitable bearing 7 provided with an enlarged body portion 8 forming a crown gear including a plurality of teeth 9 and an attaching ange 10 which is bolted or otherwise secured in any preferred manner such as shown at 11 to the said frame 5.

A hand wheel 12 is keyed to the upper end of the shaft 6 and has secured thereto in any suitable mannerl a hollow wrist p in 13. The upper end of the wrist pin 13 1s enlarged as at 14 and fits within a recess 15 With the above and other objectsin view the before described head.

An `operating rod 17 is longitudinally movable through the hollow wrist pin 13 and is provided at its upper end with a head 18 spaced normally a slight distance above the upper ends of the members 13 and 16.

The forked end 19 of a releasing grip 20 is disposed between the ends of the members 13 and 16 and the under side of the head 18 while the handle thereof extends downwardly at a slight angle relative to the han dle 16. This releasing grip 20 is pivoted as at 21 between ears 22 formed upon the side of the handle 16 adjacent the upper end thereof. p

Obviously as the handle 16 is grasped by the operator the releasing grip 20 will be engaged by the fingers of said operator and forced inwardly in the direction of the arrow shown in Figs.` 1 and 3. This will obviously rock the forked end 19 upwardly causing the upward movement of the rod 17 "and connecting link 23 which is pivoted as at 24 to the lower end thereof.

The lower end of the link 23 is pivoted to a sliding locking pawl 25 mounted in spaced parallel bearings 26 provided at one side of a casting 27. This casting 27 is provided with a tubular portion 28 which receives the said shaft 6 being held thereon against any undesired movement by a key or the like such as shown at 29.

The lower end of the pawl 25 is provided with a sharpened terminal 30 adapted to engage between the teeth 9 of the crown gear 8 in which position it is forced by the spring 31. Obviously when the releasing grip 2O is disengaged by the fingers of the operator the spring 31 will force the locking terminal 30 of the pawl 25 between the before mentioned teeth 9 which holds the shaft 6 against rotation.

As the operator grasps the handle 16 and releasing grip 20 the latter is moved inwardly which causes the upward movement of the rod17, link 28 and pawl 25, disengaging the locking terminal from between' the teeth 9. When in this position the shaft 6 can be rotated as desired and when the same.

has been turned to its proper position the release of the member 2O causes the spring 31 to force the pawl 25 again into engage- From the foregoing 'descriptionftaken in connection withthe accompanying drawing it Will be manifest that a locking device ufor cranks is provided which will fulfil fal'l 'of the necessary requirements osuch a'device, .and it should be understoodl in this con-l nection that various minor changes in the speciic ydetails of construction can be rey sorted to Within the scope of the appended vfclaims, Without departing from the spirit or sacricing any of the advantages of the invention,r and While the illustrations ac- "companying the `present application show `the device used in connection With a steering -shal't and crank for tractors, it should be understood that I am ynot to be limited to such yuse alone but may connect `the same to any other device to which the various Yparts thereof will adapt. themselves. i

Having-thus described the invention what -is claimed is; Y

l. The combination 'in a device such ias described, with a shaft, and a `crank secured thereto embodyinga hollow Wrist pin,` a rod longitudinally movable Within the Wrist 4pi-n, -a rotatable handle carried by the wrist pin, a releasing gripapivoted to the Wrist -pin,a forked extension provided upon said releasing grip and engaging the rod for moving A.the same vertically Within the hol-lo1 Wrist spin? upon-vinoyernent of the releasing grip, an V.operating`means supported byv the shaft for locking the latter against rotation, and allinkcennectien'betaveen the movable rod andlockingy means. '2; In'a "device such as described, the coinbi'nation with a shaft, a hand Wheel ,secured 'thereto' and a Wrist pin extenclinglffrom the hand Wheel, )said yWrist pin having an enlarged head, a handle rotatable upon the Wrist pin and havinga recess :receiving said fernlarged `head-whereby thehandleQW-ifl'l be supported upon the Wrist pin, a; rodislidable within said Wrist pin land havingia head spaced :above the 4upper-endet the Wrist pim` ,afndyhandla ya. releasinggrip pivoted upon `said handle, a 'forked extension formed upon the releasing grip and engaging therod beneatlr the yhead thereot whereby upon inw-.ard

movement-odi' the releasing grip, theirod ,will ,f

\ be raised Within .the-Wrist pin, a-croW-n gear vdispesedadjacent the Shaft, a casting segcured tothe sha-ft 1adjacent the crown gea-r, a gpawl .slidable iviithinthe casting forengagingthe teeth ci the crown gear, aspring actuating the paivl, 4and a lin-k connection bet\veen said ypavvl and operating rod. p

In testimony Wheeofl affix nmy signature in thepres,ence oi' two witnesses.

n ,y y GEQRGEFH. nitrates.

i s llitnesses:

f mJ.. D. VSum, WM, MAAS.`

i Copiers o1' this patent may be obtained forive eentsnei, by addressing the "fcommlssoner 'f'latentl, i VWashngtonyll. 0. p i

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