US386044A - William b - Google Patents

Description

(No Model.) 2 SheetsShet l.

W. B. TURNER.

REVERSIBLE RATGHET CLUTCH MECHANISM.

Patented July 10, 1888.

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(No Model.) 2 Sheets-Sheet 2 W. B. TURNER.

REVERSIBLE RATGHET CLUTCH MECHANISM. No. 386,044. Patented July 10, 1888..

N. FiTERS, Pnuto-Lixho n hm, Washmmcn. D. c.

tiNrra Sarns \VILLIAM B. TURJER, OF NE\V YORK, N. Y., ASSIGNOR TO THE TURNER- BEARD AUTOMATIC BRAKE COMPANY, OF SAME PLACE.

REVERSIBLE RATCHET-CLUTCH MECHANISM.

SPECIFICATION forming part of Letters Patent No. 386,044, dated July 10, 1888.

Application filed February 1 1858. Serial No. 203.946. (No model.)

To aZZ whom it may concern.-

Be it known that 1, WILLIAM B. TURNER, of New York, county and State of New York, have invented an Improvement in Reversible Ratchet-Clutch Mechanisms, of which the following description, in connection with the as companying drawings, is a specification, like letters on the drawings representinglike parts.

This invention relates to a reversible ratchetclutch mechanism, and is an improvement upon the clutch shown and described in United States Patent No. 367,077, granted to me July 26, 1887, it having for its object to improve and simplify the construction of the same.

My invention therefore consists, essentially, in a reversible ratchet-clutch mechanism, of a shaft, a shell, and a sleeve on the said shaft, combined with two sets of oppositelyinclined teeth and with pawls or latches to co-operate with the said teeth, substantially as will be described.

Figure 1 shows in side elevation a sufficient portion of a shaft'provided with my improved ratchet-clutch mechanism to enable my inven tion to be understood; Fig. 2, a vertical longitudinal section of the ratchetclutch mechanism shown in Figs. 1 and 3, the section being taken on line at m, looking to the left inFig. 3, the shaft beingin elevation; Fig. 3, a transverse section of Fig. 2 on line a" 5 looking toward the right; Fig. 4, a longitudinal section of a modified form of ratchet-clutch mechanism; Fig. 5, a transverse section of Fig. 4. on line 00 a, and Fig. 6 a transverse section of Fig. 4 on line 3 3 The shaft (1, which may be a main or counter shaft, has connected to it a sleeve, c constituting part of my improved ratchet-clutch 1nechanisn1,.the said sleeve being secured to the shaft by a spline-connection, shown as a pin, a, extended into a longitudinal slot, at, in said sleeve, thus permitting the said sleeve to be moved longitudinally on the said shaft, but preventing it from revolving thereon.

The sleeve (If, as herein shown, has cut or otherwise formed on or secured to it two sets, I) Z), of teeth oppositely inclined or pointed, the said sets of teeth being shown as separated by asmooth or plain portion or band, N, of the sleeve 0?. Each tooth Z) Z), as shown in Fig. 3, has one face made straight or flat, as at b",and its other face or back curved or rounded, as at b", for a purpose to be hereinafter described.

The sleeve a" is partially covered, as shown, by a shell, herein shown as made in two parts or pieces, I) I)", each prm'ided with an annular enlargement, U, which, when the said parts are put together, forms an annular groove, in which are pivoted, as at b a series of preferably gravity pawls or latches, 1). Each gravity pawl or latch b", as shown in Fig. 3, is provided with a finger, as If", of substan tially the same size as the flat portion or face b of the teeth b b, one face, as 2, of the said finger cooperating with one set of teeth, as I), while the other face, as 4, (see Fig. 3,) co-opcrates with the other set of teeth, as b, to cause the shell to be rotated with the shaft, as will be described.

Each part b 1), comprising the shell referred to, is preferably provided near one end with a channel, 0*, which, when the parts are put together, form an annular groove, into which is extended and adapted to rotate a pin or rod, 0, herein shown as extended diametrically through the shaft a to prevent longitudinal movement of the shell on the shaft.

The sleeve a", beyond the shell referred to, is provided with a groove, 0, which in practice may be engaged by a forked lever or shipper. (Not herein shown, but which is connected to suitable mechanism to produce a longitudinal or sliding movement of the said sleeve on the shaft a.)

As shown by full lines, Fig. 1, the sleeve a is in its innermost position, the uppermost pawls or latches,b", resting upon the sleeve to". between the teeth b. \Vith the sleeve a" in this position the shaft a may be rotated in the direction of arrow 20, Fig. 3, without rotating the shell, the pawls or latches b riding over the curved or rounded backs of the teeth I). If the shaft is. rotated in the opposite direc tion, as indicated by arrow 21, while the sleeve a is in its full-line position, the face 2 of the fingers b of the uppermost pawls will be engaged by the flat face, as I), of the teeth b,cooperating therewith, and rotate the shell with the shaft.

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To enable the shaft ct to be rotated in the direction indicated by arrow 21 independently of the shell, the sleeve a is drawn into its dotted-line position, Figs. 1 and '2, bringing the teeth I) in line with the pawls. When the shaft is rotated 'inthe direction indicated by arrow 21, the pawls are lifted by and ride over shown in Fig. 1; but instead thereof I may use two sets of pawls, I) b'-, of ordinary construction and arranged in opposite directions, as shown in Figs. 4, 5, and 6. When two sets of pawls are used, the teeth b b, which in this case may be of ordinary form, are separated by a plain portion or band, b of such width as to permit one set of pawls, as 12", to rest on it, while the other set of pawls, as b, is in line with the teeth 6".

I have herein shown the sleeve a as provided with the oppositely-inclined teeth I) b and the pawls as pivoted in the shell; but it is evident, and I consider it within the scope of my invention, that I can reverse the arrangement shown and pivot the pawls on the sleeve and provide the shell with the oppositely-inclined teeth.

My improved reversible ratehet clutoh mechanism is especially adapted to be used and operated substantially in the manner shown and described in my patent referred to, the shell being connected to the brake-lever and rotated to engage the brake-shoes with the ear-wheels by rotation of the sleeve a, splined upon the shaft a, which latter may carry a friction-disk (not shown) and be rotated by the revolution of the car-axle, as in my said patent.

I claim- 1. In a reversible ratchet-clutch mechanism, a shaft, a shell, and a sleeve on the said shaft, combined with two sets of oppositely-inclined teeth and with pawls or latches to co-operate with the said teeth, substantially as described.

2. In a reversible ratchet-clutch mechanism, a shaft, a shell, and asleeve on the said shaft,

combined with two sets of oppositely-inclined teeth and with gravity pawls or latches to cooperate with the said teeth, substantially as described.

3. In a reversible ratchet-clutch mechanism, a shaft and asleeve provided with oppositelyinclined teeth, as b b, combined with a shelland a series of pawls pivoted to said shell to cooperate with the said inclined teeth, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WVILLIAM B. TURNER. Witnesses:

J AS. H. CHURCHILL, B. DEWAR.

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