US239157A - Pejebs - Google Patents

Description

2 Sheets-Sheet 1 J. PENSO M.

Holst (No Model.)

Patented March 22,1881.

mmf

mbsses.

(No Model.)

2 Sheets-Sheet 2V J. F'ENSOM.

Hoist.`

Patented March 22,1881;

NPEYERS. PHOTO-LITHOGHAFHER. WASHNGTON, CV

UNITED STATES PATENT OFFICE.

` JOHN FENSOM, OF TORONTO, ONTARIO, CANADA.

HOIST.

SPECIFICATION forming part of Letters Patent No. 239,157, dated March 22, 1881.

Application filed February 1l, 1881. (No model.)

To all whom t may concern:

Be it known that I, J oHN FENsoM, a subject of the Queen of Great Britain, residing at Toronto, inthe county of York, in the Province of Ontario, Canada, have invented certain new and useful Improvements in Hoists for Store-Houses and other Buildings, of which the following is a specification. y

`My invention has relation to a hoisting apparatus,in which a water-engine or other motor isemployed as an auxiliaryA to a counterbalance-weight, for the purpose of elevating l the car when heavily loaded, and as the means whereby the car can be lowered when empty; and has for its object the arrangement of the counterbalance-weight and auxiliary motor, by which a motor of one-half the power may be employed Ato perform a given service.

In the operation of a hoist embodyingmy improvements I propose to make the counterbalance suiicien tly heavy to elevate themajority of loads carried up bythe hoist; but when the load is increased beyond the lifting-power of the counterbalance-weight then the waterensigned can be operated with the utmost economy, as it would be found seldom necessary,

y except when a large consignment of goods was being taken into or out of store, to use the water-engine or other motor if judgment is used in the handling of the upward and downward bound goods.

In order that my inventionmay be thoroughly understood by those familiar with the construction of h oists, I submitidrawings which exhibit l the application of my invention to an ordinary hand-hoist.

Figure 1 is a perspective view of an ordi- `nary hoist operated by a hand-rope, C, and in which the counter-balance I is made sufliciently heavy to counterbalance the Weight of the car J carrying an average load. So far my hoist is constructed in all respects in the usual manner, the auxiliary power which I apply for the purpose of elevating the hoist when the load upon the car J makes the weight greater than the counterbalance-weight I will elevate, or when the weight upon the car J is not suflicient` to overcome the weight of the counterbalance, when it is desired to cause the car J to descend it is so arranged that it can be brought into action when necessity arises for its use.

In addition to the perspective view of the hoist shown in Fig. l, I submit details of preferred mechanism for applying the auxiliary power, Fig. 2 being a plan of the friction `mechanism for grasping the rope, Fig. 3 an end view thereof, Fig. 4 a side view, and Fig'.

`5 a plan showing the application of the brake B are grooved pulleys, keyed or otherwise fastened to the spindle A in such relative position to the rope C that the said rope can be pressed into the grooves of the pulleys B, as hereinafter explained.

D is' a spur-Wheel, keyed or otherwise fastened to the spindle A, and meshing with the spun-wheel E, keyed or otherwise fastened to the spindle F. This spindle is carried in bearings attached to the plate e, which is centrally pivoted to the frame a. on the pin f, as

is clearly shown in details of this part of my F roo The pivot upon which the K, the movement of which rocks the crank backward or forward as the said arm is moved up or down, as the case may be. As the plate e is pivoted upon the frame a, and is connected to the crank h, as described, it follows that the plate c is moved upon its pivot in proportion to the motion of the arm K; and owing to the location of the grooved pulleys B and G the rope C is grasped by these pulleys either on one side of the hoist or the other, according to the movement of the lever K, the distance between the grooved pulleys B and G being such that when the spindle F is parallel with the spindleAthe rope C passes freely between them, and can thus be used as an ordinary hand-hoist.

In order to operate the lever K it is suitably connected, as shown in the drawings or otherwise, to the check rope H. The check rope which I usually employ is an endless one,'pass ing over a pulley, L, at the top of the hoist and over a similar pulley, M, at or near the base of the hoist. It will thus be seen that the operator on the car at any point in its elevation can, by grasping the check-rope H, apply the motor to the rope C so as to raise or lower the car as he may at the time desire. This use for the check-rope H would in itself not be singular if it were applied to a powerhoist; but in order to carry out the principle of my invention the mechanism I employ is arranged to grasp the hand-rope C so as to raise or lower the car, and the pulley L, over which the rope H passes, as will be seen in Fig. 5, is provided with a spindle having a crank, l, which is connected to the brake m by the rod n. In ordinary cases, where the car J is not called upon to carry more than an average load, the weight I is, as I have before volving. The pulleys B and G are thereforev ever ready to be instantly brought into action for assisting in the operation of the hoist, as

described.

When a w-ater-en gine or other motor which need not be kept constantly going is employed I connect its valve or starting-lever, by any suitable mechanical means, to the pulley M. For the purpose of illustrating this application I show a spindle, O, which is 'supposed to represent the valve-spindle of the motor placed below the iioor. The end of this spindle is provided with a link, as shown, into which a pin on the face of the pulley M eX- tends. When the pulley M is thus connected, or by any other suitable mechanical means, to

the valve or starting-lever of the motor referred to, the movement of the check-rope H trst removes the brake m from the rope-wheel K, and then starts the motor, the pulleys B and G being caused tograsp the rope simultaneously with the last action. i

In order to instantly apply the brake, and at the same time disconnect the auxiliary m0- tor from the rope C, the ordinary equalizingrope may be used. The application of this to the check-rope H is shown-in Fig. 6.

In a former part of this specification I niention that when a motor is employed'which requires to be constantly in motion the spindles A and F will always be revolving. While I think that this will probably be the preferable arrangement, it will, of course, be understood that a belt-shifter or friction-brake might be operated in the same way as the intermittent motor is started. I also wish to remark that while I prefer the check-rope, a rod or chain might be made to answer its purpose.

Having described the construction and operation of the mechanism by which I accomplish the object of my invention, it seems almost superfluous to remark that, owing to its application, great economy is secured, not only in the original cost, but also in the daily expense of operating the hoist. For the purpose of illustrating this statement, we will assume that a merchant requires a hoist capable of elevating one ton. In purchasing a hoist he would, in ordinary cases, be compelled to purchase a motor capable of exerting a power equal to this weight; whereas by the application oi' my invention a motor of one-halt` the power would accomplish the purpose, the motor being so arranged that it can be applied to the hand-rope for the purpose of either elevating or lowering the car, the lauxiliary motor being thus brought into requisition to raise the car when its load to be raised is greater than the counterbalance-weight, or to assist in lowering the car when its load to be carried down is less than sufficient to overbalance the effect of the counter-weight.

1. In hoists, the car provided with a counterbalance-weight adapted to lift the car and an average load, in combination with the check-rope or its equivalent connected to the brake and to operating machinery in such a manner that by the movement of the checkrope a given distance the brake is thrown off', while the continuation of the said movement throws into gear with the hoist auxiliary operating machinery, substantially as specified.

2. In combination with a hoist provided with an ordinary hand-rope, and in which the counter-balance to the car is adapted to lift the car and an average load, an auxiliary motor arranged so that it can be thrown into gear with the hand-rope by the check-rope after the said check-rope has first thrown oft' the brake.

3. In combination with a hoist providedwith an ordinary hand-rope, and in which the counterbalance to the car is adaptedto lift the car IOO IOS

and an average load, friction mechanism operated by the check-rope and arranged to gripe the hand-rope simultaneously with the starting of an auxiliary monter operated by the said check-rope, for the purpose of imparting motion to the friction mechanism subsequent to the releasing of the brake,`also operated by the check-rope referred to.

4. The revolving spindle A, held in stationary bearings and having keyed or otherwise fastened to it the grooved pulleys B, situated opposite to the hand-rope C, a spur-Wheel, D, `fastened to the spindle A and meshing with the spur-wheel E, which is fastened to the pivoted spindle F, the grooved pulleys G, secured to thespindleF, and situated in a position correspondin g with the pulleys B,in combination with mechanism connected to the check-rope H, by the movement of which the spindle F is adjusted upon its pivot so as to causef the grooved pulleys B and E to grasp the rope C on Whichever side of the hoist it may be necessary to apply power to the said rope, for the purpose of raising or lowering the car, as the case may be.

5. In combination with a hoist provided with an ordinary hand-rope, and in which the counter-balance to the car is adapted to lift the car and an average load, an auxiliary motor so arranged, in connection with the hand-ropes, that it can be applied thereto for the purpose ofassisting in either elevating or lowering its load'.

JOHN FENSOM.

Witnesses:

C. W. BALDWIN, H. H. WARREN.

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