US299205A

US299205A - James w

Info

Publication number: US299205A
Authority: US
Publication date: 1884-05-27
Anticipated expiration: 1901-05-27

Description

(No Model.)

J. W. DAWSON.

CLUTCH.

No. 299,205. Patented May 27, 1884.

a I 4 fl WITNESSES. 5 y 1w VEJVTOR.

N. PETERS Phou Ln UNITED dramas ATBNT tries.

JAMES \V. DAWVSON, OF RUSHV ILLE, 1N DIANA.

' v f CLUTCH.

SPECIFICATION forming part of Letters Patent No. 299,205, dated May 27, 1884.

Application filed December 21, 1883. (No model.)

To aZZ whom it may concern.-

Be it known that I, JAMES W. Dawson, of the town of Bushville, county of Bush, and State of Indiana, have invented certain new an d useful Improvements in Clutches, of which the following is a specification.

My said invention consists in an improved construction of friction-clutches,whereby they are adapted to perform all the functions of an ordinary friction-clutch without necessitating the movement of any part of the driving-gear longitudinallyupon the shaft, as will be here inafter fully set forth.

Referring to the accompanying drawings, which are made a part hereof, and. on which similar letters of reference indicate similar parts, Figure 1 is an elevation of a drivingshaft having clutch-gear thereon embodying my invention; Fig. 2, a transverse sectional View looking to the right from the dotted line z z; Fig. 8, a transverse sectional view looking to the left from the dotted line y y; and Fig. 4, a central longitudinal section through the same on the dotted line 00 00.

In said drawings, the portions marked A represent the shaft on which the gear is mounted 5 B, the clutch part which is loosely mounted on the shaft; and C, the clutch part which is. rigidly mounted on the shaft. The shaft is any ordinary shaft suitable for the purpose to which it is applied. It is provided with a spline, a, 011 which the shifter slides. The clutch part B is loosely mounted on the shaft A, and has attached thereto, or formed integrally therewith,the spool, pulley, or whatever it is desired to drive from the clutch. (A spool, B, being shown.) It is preferablya disk of an appropriate size, provided with a flan geor rim,

I], on its periphery, which runs between sets of friction-plates on the other clutch part, and is adapted to be held rigidly by them, when desired, as will be presently more fully described. The clutch part 0 is rigidly mounted on the shaft A and revolves therewith. It is provided with several pairs (preferably four, as shown) of arms, 0, one of each pair being pivoted near one end in suitable bearings, near the periphery of the part 0, on pivots c, and bearing on said end a friction-plate, c, which is adapted to fit against the outer surface of the flange or rim b of the clutch part B. The other arm of the pair is pivoted in a like manner nearer the center of said part 0, on pivots c, and bears a friction-plate on its end, which is adapted to fit against the inside surface of said flange or rim. The other end of each arm extends back from the part Oalength sufficient to act as a lever, by means of which the friction-plate thereon is thrown into and out of engagement with the clutch part B. Said arms are operated by the sliding shifter C", which is provided with pairs of arms 0, corresponding in number to the arms 0. They have wedge-blocks c mounted between them, which operate between the arms 0 of each pair. A disk having slots cut radially therein or any other device which will carry the wedgeblocks 0 may be used instead of the arms 0"; but I regard the construction shown as preferable. The shifter G is operated by a pivoted forked lever, C, as shown, or in anyother suitable or desired manner.

The operation of my invention is as follows: The clutch parts B and 0 being in position on the shaft, and it being desired to operate the spool, aulley, or whatever mechanism is attached to the part B, the shifter is slipped on the spline a in the shaft A, toward the end of the arms 0. This operates by means of the wedge-blocks c to press the arms 0 of each pair apart at this end, and close them up at the other end, thus bringing the friction-plates into contact with the flange or rim b of the clutch part B, which is between them, thus causing said clutch part to revolve with the shaft. \Vhen it is again desired to free the clutch part B, the shifter is slipped in the opposite direction, and the ends of the arms 0 are allowed to come together, and thus the frictionplates on their other ends are thrown apart out of contact with the clutch part B.

By this construction a friction-clutch is provided, which is adapted to perform the usual functions of a frictionclutch without the ne cessity of changing the relative positions of the clutch parts on the shaft.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. The combination, in a friction-clutch, of I00 the clutch part B, loosely mounted on the shaft A, and the clutch part 0, rigidly mounted on said shaft, and having pairs of arms 0, bearing friction-plates c on one end, pivoted thereto, with means for operating the same, substantially as described, and for the purposes specifled.

2. In a friction-clutch, the combination of the clutch part B, loosely mounted on the shaft A, and provided with a circular flange or rim, 1), the clutch part 0, having pairs of arms 0, pivoted thereto, said arms having frictionplates 0 on the end next the clutch part B, the friction-plate of one arm of each pair being adapted to engage with the inside surface of the flange b, and the friction-plate of the other arm being adapted to engage with the outside surface of said'flange, and a shifter, 0 which engages with the other ends of the pairs of arms 0, and operates to throw the frictionplates into or out of contact with the flange b of the clutch part B, substantially as set forth.

3. The combination, in a friction-clutch, of the clutch part B, loosely mounted on the shaft A, the clutch part 0, rigidly mounted on said shaft, provided with pairs of arms 0, each arm bearing a friction-plate, 0, on one end, and one arm of each pair being pivoted at the periphery of the part 0, and the other near its center, whereby the friction-plate on one arm of each pair is adapted to engage with the outside surface of the clutch part B,

and the other with its inside surface, and the shifter 0 as a means for operating said arms, substantially as set forth.

4. In a friction-clutch, the combination of the clutch part B, loosely mounted on the shaft A, the clutch part 0, rigidly mountedon said shaft, having pairs of arms 0, pivoted in a disk bearing friction-plates on their short 0 ends, and the shifter 0 provided with arms 0 which extend outward, one on each side of the ends of each pair of arms G, and are provided with a wedge-block, 0 between the ends of said arms 0, whereby said arms are operated, substantially as set forth.

5. Thecombination, in afriction-clutch, of the shaft therefor, a clutch part rigid with said shaft, a clutch part revoluble on said shaft, and a shifter, one of said clutch parts having a flange and the other having pairs of expansible and contractible friction-plates adapted to be forced into contact with said flange, or to be freed therefrom, by the operation of said shifter without moving either of said clutch parts longitudinally of said sh aft, substantially as set forth.

In witness whereof I have hereunto set my hand and seal, at Bushville, Indiana, this 15th day of December, A. D. 1883.

v J AMES W. DAWSON. [L. s.]

In presence of JEFFERSON CHURCHILL, HENRY G. LINN.