US380995A

US380995A - Henry f

Info

Publication number: US380995A
Authority: US
Publication date: 1888-04-10
Anticipated expiration: 1905-04-10

Description

(No Model.)

H. P. CR'ANDALL.

WINDLASS.

No.- 880,895. PatentedApr. 1o, 1888.

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UNITED STATES PATENT Ormea.

HENRY F. ORANDALL, OF MILWAUKEE, WISCONSIN, ASSIGNOR IO THE MILVAUKEE HARVESTER COMPANY, OF SAME PLAGE.

WINDLASS.

SPECIFICATION forming part of Letters Patent No. 380.995. dated April 10, 1388- A pplioation filed November 14. 1887. Serial No. 255.065. No model.)

To @ZZ whom, it may concern.a

Be it known that I, HENRY F. GRANDALT., of Milwaukee, in the county of Milwaukee, and in the State of lVisconsin, have invented certain new and useful Improvements in lVindlasses; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates towindlasses, and will be fully described hereinafter.

In the drawings, Figure lis a side elevation of my-device with the axle in cross-section. F1g.2 is a like elevation, but with the parts in a different position anda portion of one of the jaws ofthe operating-lever broken away. Fig. 3 1s a section on line 3 3, Fig. l; and Fig. 4 is a perspective view of a pawl forming part of my invention.

A is the support for the bearings ct of one end of the axle B, the other end of which is supported in alike bearing. (Not shown.) Gis a casting that forms part of the operating-lever, of which O is the hundlc. The casting O is formed with two jaws, b b', both of which are slotted, as at c c, to receive the axle B,and between the jaws theaxle carries a ratchet-wheel, D. The portion of casting O that connects jaws b b is formed with a dog, d, and on itsinner face the casting O carries a curved arm, e, and on its lower edgejaw b' has a iinger, f. A pawl, E, is pivotcd to the support A, or to a llange on the plate a of the bearing a, and this pawl has a heel, g, to receive the rounded end of a spindle, h, that carries a spring, t', the rear end of the spindle sliding freely through an opening in a lug, j.

K is a stop to limit the backward throw of the pawl E, and the position of the spindle with relation to pawl E is such that when the latter is in the positionv shown in Fig. 2 the spring will have a. tendency to hold it in that position, as its force is th en directed below the dead-center, but when the pawl is tilted forward to or beyond a vertical, then the force of the spring will serve to hold it forward in the position shown in Fig. l.

mis a lug that projects forward and upward from pawl E in position to be struck by the finger f of jaw b when the lever C C is shifted from the position shown in Fig. 1 to that in Fig. 2.

Operation. When'theparts arcin the position shown in Fig. 1,the dog d oflevers C G is in position to engage the teeth of ratchet-wheel D as the lever is drawn in the direction of the arrow, and the pawl E is also in position to engage said teeth to form a stop when t-he ratchet wheel is released by the dog of the lever; hence the ratchet-wheel and axle may be turned by reciprocating the lever on an arc of a circle inside of the vertical plane of the axis of the axle, the dog d engaging with a tooth of the ratchet-wheel to turn the axle at each forward movement of the lever, while the slots permit the lever to rise so that the dog may slide over the ratchetteeth at each backward movement of the lever,thepawl E acting as a stop to hold the ratchet while the lever is being thrown back for a new grip, and to hold the ratchet when the lever is released. f Vhen the axle is to be permitted to turn in the opposite direction, or backward, for instance, to unwind :a rope that has been wound upon it to lower a body suspended from said rope, the lever C' is drawn forward of the vertical plane of its axis, and the flngerj', striking thelug m of the pawl,will throw the latter back into the position shown in Fig. 2 and out of the line of travel of the teeth, where it will be held by the springt'and its spindle. The lever O may now be thrust inward until the arm e strikes pawl E and throws it forward against the ratchet-wheel, and as the ratchet-wheel follows the dog d the ratchet-wheel will be carried back one notch by the weight on the axle, and if the axle is to be further unwound the lever O is lifted vuntil the dog d clearsthe ratchet-teeth, and

then it (the leven) is dropped as far as the slot-s c will permit it to go, and then its upper end is drawn forward until the finger f throws pawl E out of the way, when the axle may be further unwound by again thrusting the lever inward, and this is repeated until the axle has been sufficiently unwound. A

My device is more particularly designed to operate in connection with harvesters for the purpose of raising and lowering the latter; but I do not mean to confine the use of said de vice to any special class of machinery or to the identical contour or construction of the parts, as these may be varied without departing from the spirit of my invention.

IOO

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

1. Theoombination,with the axle and ratchet-wheel, of the lever and its slotted jaws, one of which has a finger projecting from its lower edge, and a spring-pawl for engagement with the teeth of the ratchet-wheel, said pawl having a lug for engagement with the jaw-finger, as set forth.

2. rIhe combination, with the ratchet-wheel and axle, of a lever and its slotted jaws and dog for engaging the teeth of the ratchetwheel, a finger depending from one of the j aws, a spring-pawl for engaging the teeth of the ratchet-wheel, and a lug projecting from the springpawl in the path of the finger of the jaw, substantially as set forth.

. 3. The combination, with the lever, ratchet- Wheel,jaws, and spring-pawl, of an arm pro- 2o jecting from the rear of the casting, of which the jaws form a part, and a stop for limiting the inner movement of the arm, substantially as setforth.

In testimony that I claim the foregoing I 25 have hereunto set my hand, at Milwaukee, in the county of Milwaukee and Stat-e of W isconsin, in the presence of two witnesses.

HENRY F. ORANDALL.

Witnesses:

H. G. UNDERWOOD, N. E. OLIPHANT.