US363616A

US363616A - Thomas evans

Info

Publication number: US363616A
Authority: US
Publication date: 1887-05-24
Anticipated expiration: 1904-05-24

Description

(No Model.) 2 Sheets-Sheet 1.

T. EVANS. PORTABLE ELEVATOR.

N0. 363,.6l6. Patented May 24, 1887.

VILJW Ai/A rromvm.

u. PETERS. Pl'fibLilhographer. Washinglun. u. c.

(N0 Model.) 2 Sheets-Sheet 2.

T. EVANS.

PORTABLE ELEVATOR.

No. 363,616. Patented May 24, 1887.

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a i {H m J Ij k M M f 0 WITNESSES:

L! ATTORNEYS UNITED "STATES PATENT -OFFICE,

THOMAS EVANS, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO MORRIS FEIGEL, OF SAME PLACE.

Po RTABLE ELEVATO R.

SPECIFICATION forming part of Letters Patent No. 363,616. dated May 24, 1887.

Application'filed March 10, 1887. Serial No. 330,413. (No model.)

uted; and said invention has for its object toprovide a novel structure which can be moved not only in a right line but can be easily turned in any direction, whereby the work is greatly facilitated.

The invention consists, essentially, in the combination of devices hereinafter described and claimed, reference being made to the aceompanying drawings, in which-.

Figure 1 represents an elevation of an elevator embodying my invention. Fig. 2 is a vertical section of a portion of the same in the plane 00 01:, Fig. 1. Fig. 3 is a detail section in the plane y y, Fig. 2. Fig. 4 is a perspective drawn to a smaller scale than the preceding figures.

Similarlettcrs indicate corresponding parts.

In the drawings, the letters A A designate the uprights or corner-posts of a frame, which are joined at top and bottom by traversers B B to form a rigid structure. \Vithin said uprights is placed a platform, 0, which is guided by the same, and can be moved vertically by suitable means. In the example illustrated in the drawings I have provided for this purpose a pair of rotary drums, D D, which are rigidly mounted upon a'common shaft, E, having hearings in suitable boxes 40 arranged on the frame. These drums are 10- cated near the bottom of the frame and 011 opposite sides of the same. The ropes or chains F F, attached to the drums, extend upwardly and connect with ropes or chainsff, which extend over pulleys G G, Figs. 1 and 2, to

conduct said ropes or chains f f nearto the uprights A, whence they extend downward and are attached by suitable links or hooks, as g g, to the four corners of the platform. To turn the drums D D for elevating the platform, I connect the drum-shaft E by means of gears, such as H, I, J, K, and L, to a crankshaft, M, having connected thereto a crank, M, said shaft having a bearing in abox arranged on a standard, H, which latter is attached at 5 5 top and bottom to the frame. The gears H I, &c., are so compounded that one man, by turning the handle, can easily lift a large load.

The platform is caused to descend by its own weight, combined with that of the load, and to regulate the velocity with which it descends; and, also, to check and hold it in any intermediate position, I provide a band-brake having an operating'lever, H". The frictiondrum I of said hrake'is mounted on the shafts J of the gears J and K, and the handy is connected to thepivoted operating'lever Hin such a manner that when said lever is depressed the brake is applied tothefrictiondrum. Catches h h are provided for the lever H", one catch, 11, 7 holding the same in its upper or releasing po; sition, and the lower catch, 71, holding the samewhen the brake is applied to the frictiondrum 1. By depressing the lever II, more or less, the velocity with which the platform 75 descends can be regulated or entirely checked.

In order that the crank-shaft handle M shall not be revolved as the platform descends. which would cause a considerable vibration of the frame, I make the crankshaft M, Figs. 1, 8o 2, and 3, movable lengthwise in its box, so' that the gear L thereon can be drawn out of engagement with the gear K on the shaft J when desired. A locking-bar, N, Figs. 1, 2, and 3, pivoted at n to the standard H, and projecting between the gear L and the standard H, serves to prevent the shaft from being inadvertently moved. This lockingbar can be swung clear of the shaft when it is desired to move the latter. 0

The frame A is carried upon four wheels, a a, so that it can be readily moved in a right line; but in many instances it is desirable to turn the elevator, and for this purpose I pro vide a fifth-wheel or caster, O, the shank 0 of which is guided in a box arranged on one of the lower traversers, B, of the frame. By depressing this caster 0 one side of the frame is raised to lift two of the wheels, a, out of contact with the floor, and the elevator thus rests K on the remaining two wheels, a, and the caster 0, so that it can be readily turned about in any direction. The caster O can be raised or lowered by any suitable system of 1evers-snch, for instance, as a toggle lever, P, Fig. 1, which is pivoted at p to the frame and secured at 1) to the shank oof the caster, the links of said lever P being connected by a link, It, to a bell-crank lever, S, pivoted at s to a hanger arranged in the frame. By raising the lever S the caster is drawn out of contact with the floor, and by depressing the same the caster 1s lowered to raise one side of the elevator. Catches t i, secured to the frame, lock the lever S in either position. It will be observed that the various levers and the handle M are so arranged that one man can conveniently opcrate all of them, as may be desired. By the use of this caster O, in connection with the wheels a a, the structure is steadied on four wheels while the loads are being handled, and therefore stands perfectly rigid, but can be readily thrown on only three wheels when desired.

I am aware that portable elevators have heretofore been mounted on wheels, and that vertically-movable casters are not new; but I am not aware that an elevator mounted on wheels has ever been provided with a vertically-movable caster between a pair of the supporting-wheels at one side of the elevatorframe for facility in turning the elevator.

NVhat I claim as new, and desire to secure by Letters Patent, is-

1. A portable elevator-frame mounted on pairs of supporting-wheels, in combination with a caster arranged between a pair of said supportingwheels at one side of the elevator frame and movable vertically on the frame to lift the pair of supportingwheels at one side from the surface traversed to place the load on the caster for turning the elevator at will, substantially as described.

2. A portable elevator-frame mounted on pairs of supporting wheels, in combination with a caster having a shank movable vertically in a boxing at one side of the frame between a pair of the supportingwheels at such side of the frame to lift the said pair of wheels from the surface traversed and place the load on the caster for turning the elevator at will, the toggle-lever pivoted to the castershank and to the elevator-frame, and a handlever connected with the toggle-lever, substantially as described.

3. The combination, with a portable elevator-frame, of the supporting-wheels arranged in pairs at opposite sides of the frame and a caster having a shank movable vertically in a boxing on the frame between a pair of supportingwheels at one side of the frame to lift said wheels from the surface traversed and throw the load on the caster for turning the elevatorframe at will, substantially as described.

4. The combination, with a portable elevator-frame, of the supporting-wheels arranged in pairs at opposite sides of the frame, a caster having a shank'movable vertically in a bearing located between a pair of the wheels at one side of the frame, the toggle-lever P, pivoted to the frame and to the upper end of the easter-shank, the link R, connected with the toggle-lever, and a hand bell-crank lever pivoted on the frame and having its Short arm attached to the said link for lifting the wheels at one side of the frame from the surface traversed to turn-the elevator at will, substantially as described.

5. The combination,with an elevator-frame, of supporting-wheels arranged in pairs at opposite sides of the frame, a caster having a shank movable vertically in a bearing located between a pair of the wheels at one side ofthe frame, the toggle-lever pivoted to said castershank and to the frame, the upper and lower catches, it, on the frame, and the bell-crank lever connected with the togglelever and adapted to engage said catches, substantially as described.

6. The combination, with a frame mounted on wheels, of a caster having a shank movable in vertical hearings on the frame, the toggle-lever P, connected with said shank, the lever S, and the catches t t, substantially as shown and described.

7. The combination, in a portable elevator, of the main frame, the movable platform 0, the winding-drums D D, thehoisting ropes or chains F F, a crank-shaft, M, movable lengthwise in its bearings and having at its inner end the gear L, geared with the winding drums, and a movable locking-bar, N, an ranged between a part of the main frame and the gear at the inner end of the lengthwise movable shalt, substantially as described.

8. The combination, in a portable elevator, of the main frame, the movable platform 0, the winding-drums D D,thc hoisting ropes or chains F F, a crank-shaft, M, movablelengthwise in its bearing and provided at its inner end with the gear L, geared with the windingdrums, and the locking-bar N, pivoted to part of the elevator-frame to swing between a part of the elevator-frame and the gear at the inner end of thelengthwise-movable shaft, substantially as described.

In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses.

THOMAS EVANS. [L s] Witnesses:

A. FABER DU FAUR, J12, E. F. KAs'rnNnUBnn.