US1151842A - Cranking device. - Google Patents

Description

J. G. WELSH.

CHANKING DEVICE. APPLICATION HLEUOCT. 2z. 1913.

r. A my' Y um l Patented Aug. 31, 1915.

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E@ COWD that L JOHN fG- 1li/VE SE al bil einen-tween tbe humaines a seeondany citizen the United Statesg residing at San at outei' ends theieo Biego; in the county of San Diego and Stato l oi" (aliiornimhave invented certain new;r iiseizn improvements in @ranking Devine-s,v of which the following is a specification.

This invention relates 'to cranking ineemi nisnis for hydro-carbon engines, and it has for one o' its objects the provision @if ing to kee main pawl f:

mally the saine.

valso serves to y i Q5.' @ved device of this charactei in n i: i the connection between the crank-operated the real jpl misled' in the own, and t ifi'ont plate which 'toninaled in @oven 25 if consists i dei* and the engine shaft will be inter :noted or broken immediately upon the ievverse vfotaiy movement of the engine elia-ft y due to back-firmo'.

The iircfentionl has, fmtlfiermm'eA`l L die provision yof a device of f back plat-e i6 has a tiiinnlon 'Vlie bearing Ql toi Si the ine'osi pte n as long as this notatie yeei'cion; but this pawl 'w disengaged from lf2.. and also om' i?. by screws 28'. @union is rotated, as anl indient-ed ,by C, r :D pani oaiiiei will ber to rotate tfieatoliet Whee if the latter.

jects of the invention i ear be particularly v e nl? in accompanying 'drawings yin Wliieli clim-acters denote similar parte. and

.- is a central longitudinal sectie?,

. i device. Fig. 2 is a seat ts in 2 of Fig. 'l showing the pa .e positions. Fig. 3 is and illustrates the inoneation. ling to the drawings, th o. shaft of a. nydrdeamon o' ich is jeurnaled in a bearing Cn. the back plate'lQ of a i provided With 'ears 13 Wheebgf e may be imly attached to the im v e @me or of an automobile, es The 'forward end of the l Y"atebet Wheell 14 preferabl f shown in Fig. 2 and i'by -a pawl 15 which ie oz operated member consisti. f oi" carrier or casing fon e 1 1nent sections 16 and .ngethei' by screws 'or bolts o the posii the shaft the Qto 'portion ent of t@ 'o iii. Wheieupon any fier. of the pawl can suoli total understood that just as. soon as the pawl carrier is again rotated in the direction of arrow a, by the crank, the pawl 15 will again engage the ratchet teeth, as before. ln brief, it will be understood that as long as the pawl carrier is rotated clockwise, the pawl i remains in active operation to turn the ratchet wheel 14, the stationary casing with vits teeth 27 performing no function in this f engine, and also to hold a crank which may be attached thereto, in a certain position', I have provided means whereby the carrier is normally held stationary, thesemeans comprising preferably a. spring-actuated plunger 30, the end of which is adapted to enter an aperture 31 in the pawl carrier. The plunger 30 is attached to a button 32, the cross-pin 33 ot which is normally seated in the recess 34 o1- the supporting hub, but it .-nay be v pulled ont ot the same and rotatably disposed on the supporting hub to prevent the engagement ot' the plunger 30 with the pawll carrier, in which condition the latter is free to be rotated without interference.

While, as above described, the mechanism can be organized as shown in Figs. 2 and 3, it will be evident that the ratchet wheel 14 will be rotated as long as the engine shaft is operated. This means that when the lpawl carrier is stationary, the ratchet wheel 1li will slide under or click-by the pawl 15. 'lin order to avoid the noise which this construction entails, the organization may be made in the manner shown in Fig. 4, in which the engine shaft 10 is normally 'free 'from the pawl carrier 35, the construction of `which is substantially the same as previously described, but the inner hub 36 of which is provided with clutch teeth 37 adapted to engage similar teeth 88 provided on the collar 39 which is carried by the engine shaft. A spring 40 surrounds, the hub 36 cf-the pawl carrier and is seated in the recess 41 so as to push the carrier' towerd the right or into the position shown in r' 4C, in which position. the clutch teeth are 'tree fromv each other. ln that case the manera spring-operatedretaining member of l can now be replaced by a projecting lug 49. shown in Fig. 4, the spring k serving to retain the face of the carrier, or more to bring the clutchteeth into engagement, it being understood that the internal gear teeth 27 are of such width as to permit this sliding movement without passing out of the Zone of the secondary member 20, the operation of which -will remain precisely .as previously described.` As soon as the inward push on the crank is released, the parts will resume the positions shownin Fig. 4,

leaving the entire cranking device idle.

Changes may be made in the general organization, as well as in the particular con- Y struction of my improved device Without departing from the spirit of the invention, especially in the construction of the pawl carrier andits coperative parts, and also in the manner whereby such pawl carrier ma be normally held against rotation.

I claim :4-

The combination with an engine shaft,

and a ratchet wheel secured thereto, of a crank-operated carrier comprising a pair of spaced side sections secured together," one side section having a rearwardly projecting hub, the other side section having a polygonal crank-receiving portion, a casing in- 'closing said carrier and having journal bearings for said hub and said trunmon respectively, internal, gear teeth formed in said casing in lateral alinement with the space between Vsaid carrier-sections, a pawl pivoted intermediate its ends between said carrier-sections and adapted to engage said' ratchet teeth, a` dog pivote'd Aon the outer end of said pawl and engaging said gear In testimony whereof I aliirr my signature in presence of two Witnesses. y l

' .j JOHN Gr. WELSH.

Witnesses:

H. A. GILLUM,

R. D. LA vMaira;

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