US742994A - Hoisting apparatus. - Google Patents

Description

No. 74 ,994. A PATENTED NOV. 3, 1903.

A. JACKSON. HOISTING APPARATUS.

APPLICATION FILED JULY 25, 1903.

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No. 742,994. PATENTBD NOV. s, 1903.

" A. JACKSON.

.HOISTING APPARATUS.

APPLIOATIONVPILBD JULY 25, 1903.

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PATENT OFFICE.

ANDREW JACKSON, OF WILMETTE, ILLINOIS.

HOlSTlNG APPARATUS.

SPECIFICATION formingpart of Letters Patent No. 742,994, dated November 3, 1903.

Application filed July 25, 1903.

To all whom it may concern:

Be it known that I, ANDREW JACKSON, a citizen of the United States, residing at Wilmette, in the county of Oook and State of Illinois, have invented certain new and useful Improvements in Hoisting Apparatus, of which the following is a specification.

My invention relates to improvements in apparatus for hoisting various loads by man'- ual power, and while shown and especially adapted for use in the operation of a traveling hay-fork for unloading hay from a wagon and carrying the same into a haymow it is obviously adapted for use in various other situations.

The object of my invention is to provide a powerful, easily-operated, and portable device for the purposes named. such other objects as may hereinafter appear are attained by the devices shown in the accompanying drawings, in which Figure 1 is an elevation of my apparatus. Fig. 2 is an end view thereof. Fig. 3 is a like view with the clutch disengaged. Fig. A is a side elevation thereof, and Fig. 5 indicates the parts in reversed position.

Like characters of reference indicate the same parts in the several figures of the drawings.

Referring by letter to the accompanying drawings, A indicates a base upon which the apparatus may be mounted, although it may, if desired, be attached directly to the side of a barn or other building. Mounted upon the base A is-a pair of brackets B, upon which is mounted a shaft 0.

Keyed or otherwise rigidly secured to the shaft 0 is a ratchet-wheel D, provided with a shoulder cl. Loosely mounted on the shaft C is a sleeve carrying a clutch E, a gear-wheel F, and a drum G. Mounted upon the shaft 0 in such a manner as to normally hold the clutch E on the sleeve in operative engagement with the shoulder d on the ratchetwheel D is a spring H.

F I is a third bracket, between which and one of the brackets B is mounted a shaft J, carrying a spool K, provided with a gear-wheel L. A suitable spring M is provided and so mounted that the rotation of the spool L in one direction will tend to wind up the spring M, so that the tendency of the spring M will These and Serial No. 166,930. (No model.)

-be torotate the spool L inthe opposite direction.

N is a lever so mounted as to be operated bymeans of a rope O, passing over a pulley P, to throw the clutch E out of engagement with the shoulder 01 upon the ratchet-wheel D. Q is an operating arm or lever, which may be provided with a rope q, depending from its end. This lever is pivoted at q and is connected, by means of a link 1", with a lever R, which is pivoted at r and is provided at its opposite end with a weight r S T is a compound lever, pivoted at s to the lever B and at t to the base A, the members S T of the lever being pivotally secured to each other at their adjacent ends and being, respectively, loosely pivoted to the lever B and the base A, so as to have some freedom of movement in a direction transversely of the pivots upon which they are mounted. U

ingly pivoted at s to the leverR by means of a slot (indicated in dotted lines in Fig. 1) and is pivoted at a: to the base A and at u to the base A and at bothpoints so as to have some play laterally of the pivots upon which the lever is mounted, the middle member V of this compound lever being pivoted at its opposite ends to the members U and X, respectively. The lever S T is held in its normal position by means of a spring Y interposed between the lever S and the base A and indicated in dotted lines in Fig. 2, while the lever U V X is similarly held in normal position by means of a spring Z, interposed between the members V X and the base A. These compound levers are so mounted that in their normal positions the members T and X, respectively, will be adjacent to and behind successive teeth of the ratchet-wheelD.

The operation of the device as so constructed is-as follows: Starting with the apparatus in the position shown in Fig. 1 the lever Q is swung downwardly upon its pivot q and by means of the link '1' draws the lever B down upon its pivot r, thereby elevating the opposite end of the lever B, carrying the weight T and at the same time swinging the V X is another compound lever which is slidcompound lever S T upwardly. Inasmuch as the member T of the compound lever S T is normally situated adjacent to and just behind one of the teeth of the ratchet-wheel D,

the upward movement of the lever ST upon its pivot t causes apawl-and-ratchet action as between the lever T and the ratchet-wheel D, thereby rotating the ratchet-wheel, while at the same time the ratchet-wheel swings the lever member T inwardly against the tension of the spring Y. At the same time the upward movement of the outer end of tllelever It causes a corresponding upward movement of the lower end of the member U of the compound lever U V X upon its pivot u and a corresponding downward movement of the members V X of said compound lever to such a position that the spring Z will force the member X outwardly and snugly against the member T of the lever S T, so that the teeth of the ratchet-wheel D, being of sufficient depth, the lever members T and X will simultaneously lie immediately behind and adjacent to the same tooth of the ratchetwheel D. As the lever Q is now released, the weight r will automatically swing the lever R downwardly, thereby causing a reverse movement ofall of the parts,including the elevation of the members Z X of the compound lever U V X, the member X engaging the tooth of the ratchet-wheel behind which it lies and still further rotating the ratchetwheel as the member X rises, the ratchetwheel at the same time swinging the member X inwardly-against the tension of the spring Z, while at the same time the compound lever S T descends until the member T is behind and adjacent to another tooth of the ratchet wheel D, whereupon the further downward movement of the lever Q will cause a still further rotation of the ratchet- Wheel D, and so on indefinitely, as the lever Q is alternately depressed manually or otherwise and raised automatically by means of the weight r It'will be seen that by means of the clutch engagement between the sleeve G and the ratchet-wheel D the rotation of the ratchetwheel D will cause a corresponding rotation of the spool or sleeve G, While by means of the gear-wheels F and M, which intermesh, an opposite rotation of the sleeve K will be caused, while at the same time the spring M is wound up.

Upon the operation of the lever-N, by means of the rope O or otherwise, the clutch E is thrown out of engagement with the shoulder 01 upon the ratchet-wheel D, whereupon the tension of the spring M as it unwinds will cause the rotation of the spool K, gear-wheel L, gear-wheel F, and spool G in a direction opposite to that in which they were rotated by the operation of the levers R Q.

It will be noted that the gear-wheels F and L are of such relative width that they will not be thrown out of mesh with each other by the diseggagement of the clutch E from the shoulder In the application of my device, for instance, to a hay-carrier the hoisting-rope by means of which the hay-fork is raised to the usual trolley running on an overhead track and is then drawn along the trolley to a desired point in the haymow is attached to the spool G, so that when the spool G is rotated by the operation of the levers R Q the hoisting-rope will be wound upon the spool G. At the same time the trip-rope is attached to the spool K, is passed through one end of the lever 1, and then behind the pulley 2, and thence to the hay-fork in the usual manner.

- As the hoisting-rope is wound up upon the spool G the trip-rope is of course unwound from the spool K..

The rope 0 under certainconditions will be passed through the opposite end of the lever 1, so that when the rope O is pulled to shift the clutch E such pull will also take up the slack in the rope 0 caused by its connection with lever 1, thereby swinging the lever 1 upon its fulcrum and causing a corresponding movement of the opposite end of the lever which engages the trip-rope, thereby pulling the trip-rope and releasing the hay from the hay-fork.

As soon as the clutch is disengaged and the hay at the same time released from the fork the unwinding of the spring M will rotate the spool K in a direction to wind up the triprope and by means of the coengaging gearwheels will simultaneously and correspondingly unwind the spool G, and thus unwind the hoisting-rope, whereby the trolley, carrying the hay-fork, is returned to its original position and the hay-fork is allowed to descend' to the hay-wagon for another load of hay, and so on.

While I have shown a convenient means of constructing my apparatus, I of course do not limit myself to the exact features of construction shown.

I claim- 1. The combination with a ratchet-wheel, of a spool removably engaged thereby, a main operating-lever and a pair of secondary 1evers arranged to alternately engage teeth upon said ratchet-Wheel, so as to rotate the ratchet-wheel and spool, and means for drawing the spool out of engagement with the ratchet-wheel.

2. The combination with a rotatablymounted ratchet-wheel, of a spool provided with a clutch arranged to engage said ratchetwheel, a main operating-lever arranged to be manually operated in one direction, means for operating said lever in the opposite direction, and a pair of levers operatively connected with said main operating-lever and arranged to engage the teeth of the ratchetwheel so as to rotate the ratchet-wheel, and means for throwing the spool out of engagement with the ratchet-wheel at will.

3. The combination with a shaft, of a ratchet wheel mounted thereon, a spool sleeved upon said shaft and having operative connection with said ratchet-Wheel, a gearwheel connected with said spool, a second shaft provided with a spool and with a gearwheel meshing with saidfirst-named gearwheel, a spring adapted to be wound up by therotation of said second-named spool, a main operatinglever adapted to be operated manually in one direction, means for operat ing said lever in the opposite direction, and a pair of levers having operative connection with said first-named lever and arranged to alternately engage teeth upon said ratchetwheel so as to rotate said ratchet-wheel, and means for throwing said first-named spoolout of operative connection with said ratchetwheel, substantially as described. an

4:. The combination with a shaft, of a ratchet wheel mounted thereon, a spool mounted upon said shaft and having operative connection with said ratchet-wheel but adapted to rotate independently of said ratchet-wheel, an operating-lever adapted to ANDREW J ACKSON..

Witnesses:

M. E. SHIELDS, F. H. DRUBY.

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