US118301A - Improvement in elevators - Google Patents

Description

i 4 PATENTE AUG 22 1871 I 7271917@ Elelfaloz UNITED STATES PATENT OFFICE. l

IMPROVEMENT IN ELEVATORS.

Specification forming part of Letters Patent No. 118,301, dated August 22, 1871.

To all whom it may concern:

Be it known `that I, GUsTAvUs C. TIMPE, of New Orleans, in the parish of Orleans and State of Louisiana, have invented a new and useful Improvement in Elevators; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawing forming part of this specification, in" which Figure lis a vertical cross-section of my improved elevator taken through the drum and idler. Fig. 2 is a side view of the same, parts being broken away to show the construction. Fig. 3 is a vertical section of the same taken longitud inally, with the drum and parts being broken away to show the construction.

Similar letters of reference indicate corresponding parts.

My invention has for its object to furnish an improved elevator for hoist-ways in stores and other buildings, which shall be simple and inexpensive in construction, convenient in use, and e'ective and safe in operation; and it consists in the construction and combination of various parts of the apparatus, as hereinafter more fully described.

A represents the guide-posts or ways, along which the platform or cage B moves up and down. C is a bar, which passes down through the top cross-bar of the frame of the platform or cage B, and to the upper end of which is attached the end of the hoisting-rope D. To the lower end of the bar C is attached the middle part ofthe spring E, the ends of which rest against the under side of the cross-bar, through which the said bar C passes, and which may be plated to prevent it from being worn by the said spring E. To the sides of the bar C are pivoted the inner ends of two levers or pawls, F, the outer ends of which pass through holes in the ends of the cross-beam in which they Work. By this construction, should the rope D break or any of the mechanism give way, the elasticity of the spring E will instantly draw down the bar G, which will project the ends of the levers F against the ways A, holding the platform or cage B, securely inplace, and holding' it the more securely the heavier the load upon it. In case the ends ofthe levers F are to act upon wood their outer ends should be sharp; but, if desired, toothed racks may be attached to the ways A, in which case the outer ends of the levers F need not be made sharp. The rope D passes over and makes two or three turns around the drum G, around the drum or idler H pivoted to supports at one side of the hoist-way, and over a pulley, I, swiveled at the other side of the hoistway, and to its end is attached a weight, J, which moves up and down through a well running down along one of the guide-posts A. 'Ihe weight J keeps the rope D taut, and at the same time acts as a counter-balance to the platform or cage B. The swiveling of thc pulley I allows the rope D to pass down vertically into the well in which the weight J moves, whatever' direction the other part of said rope D may take. The idler H is designed to be used when the rope D is a Manila rope. When the rope D is a wire rope the idler H is not used; but in this case the drum G should be metallic and grooved. rlhe drum G is made with an enlargement, having an inclined shoulder, as shown in Fig. 3, to prevent the rope, when a Manila rope is used, from getting out of line with the ways A when the platform or cage B approaches the said drum G. The journals of the drum G revolve in bearings in frames or brackets K L attached to the frame of the building or hoist-way, as may be convenient. To one end of the drum G is attached, or upon it is formed, a large gear-wheel, M, the teeth of which mesh into the teeth of the small gear-wheel N attached to the end of the journal of the grooved pulley or wheel O, aroimd which passes the endless rope to which the power is applied. The journals of the grooved pulleys or wheel O work in bearings in the frames or brackets L P attached to the frame of the building or hoist-way. To the side of the pulley or wheel O is attached,` or upon it is formed, a smooth-faced pulley, flan ge, or shoulder, Q, to receive the brake-strap R, the middle and lower part of which is pivoted to a bracket or support, S, attached to the lower part of the frame or bracket P. The ends of the strap R are pivoted to the lever T upon the opposite sides of its pivoting point, as shown in Fig. 2f. The lever T is pivoted to the frame P, and to its upper end are attached the ends of two ropes, U V. The rope U passes over a guide-pulley, af, and eX- tends down through or near the hoist-way, so that it may be conveniently reached and operated by the operator to apply the brake from any lioor of the building or from the platform or cage B at any point of its movement. The other rope, Y, passes over a guide-pulley, o', and has a weight, W, attached to it sufficient to draw back the lever T and loosen the brake-strap R Whenever the said lever T is released. X is a curvedratchetpaWl, which is pivoted to the frame or bracket P, and against the teeth of Which rests a pin, t', attached to the lever T, so that the said lever may be held by the said paWl in any position into Which it may be moved in applying the brakestrap. To the other end ofthe pawl X is attached one end of a rope or cord, Y, Which extends down along the side of or near the brake-cord U, so that the operator, by pulling upon the cord Y, may at any time vrelease the lever T and allow the brake-strap R to be loosened by the Weight W.

Witnesses:

WM. DINKEY, JNO. K. COLLINS, Jr.

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