US300142A - Hoisting-gear - Google Patents

Description

L LU e e. h S M e e, h S 2 B L L I V O O S A. & L

(No Model.)

HOISTING GEAR.

No. 300,142.; Patented-June 10, 18 84.

Nv FEIERS. PMln-Lllimriphet, Waxhingtom D c (No Model.) 2 Sheets-Sheet 2.

I. 85 A. SGOVILLE. HOISTING GEAR.

No. 300,142. PatentedJune 10, 1884-.

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UNITED STATES PATENT which,

; IV ES SGGVILLE AND AVERY SCOVILLE, OF OAKLAND, CALIFORNIA.

HOlSTlNG-GEAR.

SPECIFICATION forming part of Letters Patent No. 300,142, dated June 10, 1384. Application filed April 19, 1884. (No model.) 7

To all whom it may concern:

Be it known that we, lvEs ,SCOVILLE and AVERY SoovILLE, of the city of Oakland, county of Alameda, and State of California, have invented an Improvement in Hoisting- Gear; and we hereby declare the following to be a full, clear, and exact description thereof.

-Our invention relates to an improvement in hoisting-gear and it consists of a frictional mechanism in connection with what is known as differential hoisting-gear, whereby the gear which is driven by an eccentric upon the main shaft may be connected so as to drive the drum, or disconnected sothat the drum may be allowed to revolvein a reverse direction without stopping or reversing the engine.

Referring to the accompanying drawings for a more complete explanation of our invention, Figure l is an end elevation, showing our invention. Fig. 2 is a horizontal section. Fig. 3 is an elevation showing recessed end of drum, gear, and cam.

In the present case we have shown our invention as applied to a rope-winding drum, A, which is mounted so as to revolve loosely upon a shaft, B. To this shaft is keyed an eccentric,O,which loosely fits an opening in the hub of a toothed gear, D, so that when it is revolved it will move the gear around with an eccentric motion. The end of the drum A is recessed, so that the gear D may move around within the recess, and it has an internal gear to fit the teeth of D. The internal gear has one tooth more than there are on the gear D. The pitch-line of these internal teeth forms a circle enough larger than that of the gear D to allow of the movement given the latter by the eccentric, and as the latter moves around within the recess the teeth engage, the difference in'the number of teeth making the amount of advance given to the drum by each revolution, and constituting a differential gear. In these gears it has hitherto been necessary to reverse the whole machinery in order to rotate the' drum in the opposite direction. I

In our device F is a circular flange, which projects outwardly from the vertical plane of the teeth, and is surrounded by a ring or strap, G, the upper part of which is divided, and has lugs or arms, as shown at H H. An arm, I, extends out to one side from this strap, and its outer end is supported by a rod or link, J, one end of which is pivoted to it, while the other is supported by the fulcrum-pin of the foot lever K. The lugs H H are slotted to admit a plate, L, one end of which is pivoted to the lug H, while the other is pinned to the upper part of the adjacent end of the lever M. The lower side of this lever has alug or projection, N, which is connected by a pin or otherthe outer end of the lever is raised these'connections act upon the lugs H H to separate the ends of the strapflr and cause it to run loosely upon the hub or flange F. This allows the latter, with the gear and drum, to be turned backward, while the shaft, eccentric, and driving crank or gear may remain stationary or continue to move forward. The short arm of the foot-leverK is connected with the long arm of the lever M by a rod, P, so that when the footlever K is pressed down the lever M will act to loosen the strap G, as before described. WVhen relieved of this pressure, a spiral or other spring, Q, acts to force the outer end of the lever M down, and thus cause the strap G to clamp the flange F firmly, so that the eccentric will again act through the gear to rotate the drum forward. By this arrangement it will be seen that the drum may be used to wind a rope for hoisting or other purposes, which out stopping the engine.

R is a short lever-arm fixed to the fulcrum-. shaft of the foot-lever K, and it has a bandbrake, S, connected with it, so that when the upon the rim of the drum with any desired force," and thus the speed at which the drum moves in the reverse direction is regulated.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. In a differential winding-gear, the drum A, having the recessedinternally-toothed end, an interior spur-gear, D, of smaller diameter and one less tooth, with a concentric hub, 0, having an eccentric revolving loosely within it andkeyed to the shaft, as shown, in combination with astrap, G, fitting the projecting hub or flange of the gear D, and a mechanism, as described, by which the strap may be may be allowed to unwind at any time withstrap G is loosened the band may be pressed wise with the lug H. It will be seen that when clamped upon or loosened from the flange, sub stantially as herein described.

2. In combination with awindingdruni and differential driving-gear, as shown, a strap,Gr. open at one side, and having the arm I supported so as to be free to follow the movements of the eccentric without rotating with it, a lever, M, connected with the lugs H II of the open sides of the strap to open or close it upon the flange of the driving-gear, substantially as herein described.

3. In a differential driving-gear, the strap G, surrounding the flange of the spur-gear D, open at one side, and having lugs which are acted upon by a lever, M, to open or clamp it upon the flange, in combination with a footlever, K, and spring Q, connected with the le vcr M, substantially as herein described.

4. In a differential gear, the strap G, surrounding the flange of the gear D, with its 20 guiding-arm I and operating-lever M, in combination with the foot-lever K, lever B, and band brake S, substantially as herein described.

In witness whereof wehave hereunto set our 25 hands.

IVES SOOVILLE. AVERY SOOVILLE.

Witnesses:

J. It. SEARS, JNo. O.MARsI-I.

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