USRE6215E - Improvement in machine-clutches - Google Patents

Description

UNITED STATES PATENT CEFICE.

ALBERT B. BEAN, OF NEWTIAVEN, CONNECTICUT.

IMPROVEMENT IN lVICHlNE-CLUTCHES.l

Specification forming part of Letters Patent No. 148,165, dated March 3, 1874; reissue No. 6,215, @ai ed January 12, 1875 5 application tiled December 26,1874.

To all whom it may concern:

Be it known that I, ALBERT B. BEAN, of New Haven, in the county of New Haven and Stateof Connecticut,have invented anew Improvement in Machinery-Clutch; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear,'and exact description of the same, and which said drawings constitute part of this specification, and'represent, in-

Figure 1, a front view 5 and in Fig. 2 a longitudinal section.

This invention relates to an improvement in what is known as machinery-clutch-that is to say, a device by which to connect or disconnect a pulley with the shaft upon which itisplaced-so that, when required, therevolution of the driven pulley may be communicated to the other. Y

By the term pulley in this specification I wish to be understood as including gears, or whatever device it may be, for receiving or communicating power.

This invention consists in combining a sleeve on the shaft, constructed so as to revolve with the shaft, but to have a free 1ongitudinal movement thereon, and a pulley loose upon, or independent of, the said shaft, with a har arranged in connection, and so as to revolve with, the said sleeve, and also in connection with said pulley, and constructed so that a longitudinal movement of the said sleeve will impart a rotative movement to said bar, and cause it to engage or free the said pulley, accordingly as the sleeve is moved toward or from the said pulley, as more fully hereinafter described.

A is the shaft; B, the pulley, loose upon the shaft, and prevented by the collar C from longitudinal movement. Dis the sleeve, fitted to the shaft, and connected thereto by a spline, E, or other known device, which will cause the two to revolve together, and yet allow a free longitudinal movementof the sleeve toward or from the pulley. In connection with the sleeve D I arrange a bar or bolt, I, parallel, or nearly so, to the shaft, (here represented as fitted in the arm,) so as to allow the free longitudinal movement of the arm over the bar. To the bar I a rotative movement is imparted by the longitudinal movement of the sleeve, here represented as by means of a spiral groove, a, into which a stud, d, in the arm sets, so that a longitudinal movement of the sleeve will, through the said stud and spiral groove, impart the required rotative movement to the bar. The end of the bar I next the pulley is connected to the pulley, so that the rotation of the bar in one direction will engage the pulley, and cause it to revolve with the bar, sleeve, and shaft; but the rotation of the bar in the opposite direction will disengage the pulley,-

and free it from the action of or upon the shaft, as the case may be. This connection I prefer tomake as represented-that is, by a T-shaped groove, L, in the side of the pulley, into which a nut, d, is placed and prevented from turning, and the end of the bar I construct with a thread corresponding to said nut, as seen in Fig. l, and the nut and arm set so close together that the rotation imparted to the bar from the sleeve, as by moving the sleeve to the position denoted in broken lines in Fig. 1, will bind or clamp the pulley between them with sufficient force to couple the shaft and pulley together; and the return of the sleeve causes a corresponding disconnection, and, when so disconnected, the nut is free to run around the groove Il, when the shaft is turned and the pulley stationary, or to remain stationary with the shaft while the pulley turns, as the case may be.

In cases where two pulleys are used, as in counter-shafts for screw-cutting lathes, the second pulley, B ,is constructed and arranged in like manner with a corresponding bar, I', so that throwing the sleeve in .one direction will engage one pulley, and in the other direction will engage the other, or, in an intermediate position, leave both pulleys free.

This description and illustration will enable those skilled in this class of mechanical devices to apply this invention to other purposes.

I claim as my inventionl. In combination with a shaft and pulley loose thereon, and the sleeve D, in connection with said shaft so as to revolve therewith, but free for longitudinal movement, thebolt or harl I, in connection with the pulley and with the sleeve, so that e longitudinal movement of said sleeve Will impart a rotative mo vement to said bolt or bar, and thereby cause the said bolt to engage the pulley with, or disengage it from, the shaft, according to the directionY of the movement of said sleeve, substantially as described.

2. A clutch-pulley constructed with a T- shaped groove or flange, L, combined with a bolt, I, and a nut, d', in said groove, and means, substantially such as described forimparting a rotative movement to 'said bolt7 to engage or disengage said pulley.

A. B. BEAN. Witnesses:

JOHN E. EARLE, O. V. FoRBEs.

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