US1406638A - Portable elevator - Google Patents

Description

- H. S. GERM OND, JR.

PORTABLE ELEVATOR.

APPLICATION FILED MAR. n,1920.

Patented Feb. 14, 1922.

WITNESSES W win ATTORNEYS siren STATES PATENT OFFICE.

HENRY siinnnnn ens-Morin, orsayoivn'n, new a'r-nsnv, assrenon T0 nnvonva- 'EORGOMPANY, or annsnv orrY, NEW JERSEY, a ooaronnrronor new JERSEY.

. PORTABLE ELEVATOR.

Specification of Letters Tiatent. Pgtgnted Feb, 14, 192,2,

' Application filed March 11, 1920. Serial No. 364,971.

To all whom it may concern:

Be it known that I, H NRY SI-IELDEN Gnniroivn, J12, a citizen of the United States of America, residing at Bayonne, in the county of Hudson and State oi New Jersey, have invented certain new and useful Improvements in Portable Elevators, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to improvements in portable elevators (otherwise known as tiering machines), and particularly to improve ments in the construction and arrangement of the load-carrying platform (or liftingcarriage) thereof; and an object of this invention is to provide a tiering-machine the lifting-carriage of which may be more readily loaded and unloaded than has been practicable to accomplish with machines heretofore known. Another object of this invention is to provide a tiering-machine in which it will be practicable to raise the liftingcarriage'to a greater height than is the case with prior tiering-machines having the same over-all vertical dimension; or, by means of this invention, it is made practicable to lessen the latter dimension of the tieringmachine and yet to raise the load to a height equally as great as was possible with prior machines having a greater height over all.

In the drawings illustrating the principle of this invention and the best mode now known to me of applying that principle, Fig. 1 is a rear elevation of a tiering-machine embodying this invention; and Fig. 2 is a side elevation of the same, partly in section on the line lL-II oi Fig. 1.

The tiering-machiue comprises a pair of base-arms a, one at each side, from which rises a pair of mainframe standards 3) the upper ends of which are connected by a cross-beam c from which hangs the pulley (Z. A cable 6 is rove over the latter and one of its ends is wound upon the Windlass-drum f of the hoist g or" the machine, which hoist is operated by turning the crank-handle it. The rear part of each base-arm a of the truck-frame of the elevator is supported by a truck-wheel or rear-wheel 2', while the front of the elevator is supported, while being moved from place to place over the floor, by means oi a caster-wheel j, and is held immovable, by being lowered (for example) until the weight rests upon posts is, of which there is one arranged near the front end of each base-arm a. The parts hereinbefore mentioned are common to portable elevators already known to the art. Each side of the load-carrying platform or lifting carriage m is L-shaped and consists of a vertically-disposed arm-member a and a horizontally-disposed arm-member 0, which are securely joined together in any suitable manner, as by the Tangle-piece 37. To each of the horizontal arms 0, there is pivotally connected one end of each of a pair of links the pivot r of one of the latter is arranged near the front end of the arm 0, while the PlXOlJ r of the other link g is located near therear end of the arm 0. Between the arms 0, there lies, in its lowermost position, a basket or receptacle .9 adapted and designed to receive the load (or to serve as a load-receiver). This basket 8 is U-shapcd and has sides 8 and a floor or 7 bottom 8. To each side 5 of the load-receiver or basket 8 are pivotally secured at r the other or rear ends of the pair of links Q that swing on the pivots r, r, of the adjacently-lying arm 0 of the lifting-platform m. It will be readily understood, from the description just given, that the basket 5 may be swung up and down upon the links 9, relatively to the horizontal arms 0 of the platform m, which may be said to serve as a sort of a cradle for it, to raise the basket .9, the other (or rear) end of the cable 6 is fastened to the front of the basket s, near the midpoint (as at 8X), by means of a suitable shackle contrivance 2?, for example. in its lowermost position, the basket 8 rests with its bottom 8 supported by the door of the building (e. g., a warehouse); and, when in this position, the basket 8 may be most easily loaded. After loading the basket .9, the operator turns the crank-handle It so as to wind up the cable 6. As the cable is wound up, the basket 8 is raised, swinging up on the link-arms g, which pivot on the platform-arms 0 at the points 9, 1*, as set forth hereinbe'fore. The upward movement or the basket 8 relatively to the platformarms 0 (which, for thetime being, remain motionless) continues, until the link-arms 9 have risen to a substantially vertical position (see the dotted-line position of the basket in the lower part of Fig. 2), whereupon further winding-up of the cable 6 by turni'ng the crank-handle 71. will result in causing the lifting-carriage m and the basket 8 to travel upwardly together, in the relative positions indicated by the dotted lines representing the basket and the link-arms in the lower part of Fig. 2. By referring to the upper part of the latter figure, it will be seen that the basket 8 may be raised to almost the top of the machine, which may, without lessening the height to which the load can be raised, be shorter over all, in comparison with machines heretofore known; or, for the same over-all dimension, the load may be raised higher by a machine of the kind herein illustrated and described.

In the lowermost position of the basket 8, the link-arms Q rest on and are supported by stop-blocks a that project inwardly from the platform-arms 0.

I claim:

1. A portable elevator including a main frame; hoisting mechanism; a basket-receiving lifting-carriage open at its top and arranged to travel up and down in said main frame; and a load-receiving basket carried by said lifting-carriage and movable up above the same and down therewithin.

a hoisting-cable attached to the load-1e ceiving basket.

Signed at the city of Jersey City, in the county of Hudson and State of New Jersey, this ninth day of March, 1920, in the presence of the two undersigned witnesses.

HENRY seamen armour), Jr.

Witnesses FLORENCE B. PORTER, WILLIAM W. BOELICK.

Images