US272988A - thompson - Google Patents

Description

2 Sheets-Sheet 1.

(No Model.)

J. THOMPSON.

' TRAVELING CRANE, DERRICK, &c.

No. 272,988. Patented Feb.27, 1883.

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(No Modl.) v 2 Sheets-Sheet 2.

.J. THOMPSON.

TRAVELING CRANE, DERRICK, &c.

No. 272,988. Patented Feb.2"7, 1883.

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UNITED STATES PATENT OFFICE.

JOHN THOMPSON, OF BUOYRUS, OHIO, ASSIGNOR TO THE BUOYRUS FOUNDRY AND MANUFACTURING COMPANY, OF SAME PLACE.

TRAVELING CRANE, DERRICK, aw.

SPECIFICATION forming part of Letters Patent No. 272,9 88, dated February 2'7, 1883.

Application filed January 17, 1883. (No model.)

To all whom it may concern:

Be it known that 1, JOHN THOMPSON, of the city of Bucyrus, county of Crawford, and State of Ohio, have invented certain Improvements in Traveling Cranes, Derricks, and Similar Devices; and I hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of the specification, in which- Figure 1 is a horizontal sectional view of the lateral swinging mechanism of a traveling crane or similar device. Fig. 2 is a vertical section on the line {I} a: of Fig. 1. Q

My invention relates to means for operating the chain-drums of traveling cranes, and has for its object to facilitate the handling of such machinery.

My invention consists of the details of construction of a friction-clutch mechanism and operating parts, as hereinafter fully described,

wheel B. By this gearing, when wheel'A is revolved in one direction wheel B revolves in the opposite direction, and vice versa. The wheels A B are loose upon shaft 0, to which are keyed the chaindrumsa a, which swing the crane-boom in their rotation. Between wheels A B, around shaft 0, is a collar, D, having fourprojecting arms, t it t, which operate through turn-buckles h H, whose screws h h connect with arms 25 t and sliding friction-shoes G G by means of pin or ball-joints, fora purpose hereinafter described. The shaft 0 is centrally bored from its end down to a point between wheels A B, where a slot, 8, (shown in Fig. 1,) is cut to the circumference. Within the central bore of shaft 0 is placed a rod, 6, the inner end of which is secured to collar D by a key, It, so that a reciprocation of rod 6 will move collar D back and forth on the shaft within the limits of the slots. A yoke, P, at the cndofshaft G supports a crank, W, which is connected to the outer end of rod 0 bya link, V, and the other arm of the crank, by means of connecting-rod Y, is connected to a lever, Z, having a toothed rack properly and conveniently located on the platform, whereby the operator can reciprocate rod e back and forth and change the position of collar D in relation to wheels A B. As collar D is forced toward wheel B the armst it move the turn-buckles h H toward the face of the wheel D, and, moving as they do on their pin or ball-joints, they force outward the frictionshoes G G, whose curved faces, coming in contact with the interior surface of the rim of wheel D, clutch it to shalt C, so that the power through pinions L M N rotates the shaft and chain-drums in one direction. By reversing the movement of rod 0 the clutches seize wheel Ain a similar manner, and-pinion K and wheel A rotate shaft 0 in the opposite direction.

The faces of the'clutch-shoes G G may be covered with vulcanized fiber or any other desirable material.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a traveling crane or derrick, the power-shaft I, pinions K L M N, shaft 0, and loose wheels A B, in combination with collar D, provided with arms t t, turn-buckles h H, and sliding friction-shoes G G, all constructed, arranged, and operated as set forth.

2. The loose wheels AB, central hub or collar, D, provided with a friction clutching do vice in combination with the hollow slotted shaft 0, rod 0, and operating crank and lever, substantially as'specified.

7 JOHN THOMPSON. Witnesses: FRANKN. ADAMS,

W. B. CRITTENDEN.

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