US152013A - Improvement in elevators - Google Patents

Description

n. sae'unen.

Elevators.

Patented June 16, 1874.

NOA-52,013.

UNITED STATES PATENT OEEIeE.

RAIMUND SEEBURGER, OF DES MOINES, IOWA.

IMPROVEMENT IN ELEvAToRs.

Specification forming part of Letters Patent No. 152,0 [3. dated June 16, 11574; application filed April 13, 1874.

` specication The'objeot of my invention is to, provide a portable elevator that can be placed 011 a cellar stairway or any other support, and easily operated by one or more persons, to raise and lower boxes and barrels of merchandise, and all kinds of articles and packages too heavy to be carried. It consists in the manner of forming, combining, and co-operating a skid and a truck, as hereinafter fully set forth.

My drawing is a perspective view, illustrating the construction, application, and operation ot' my invention.

aa represent the parallel beams of the skid. They may vary in dimensions and weight to suit different places and purposes. b b are the cross-pieces by which the beams are framed together. c c are guard and track rails, secured in any suitable way to the outsides ofthe beams a, in such amanner that they will project laterally from the beams, and also above the top edges of the inclined beams. d is a top end cover, hollowed out on its front edge, and rigidly attached to the ends of the beams. j' j' are triangular blocks rigidly attached on the under sides oi' the beams, and

near their upper and also lower ends, and serve as rests or catches to retain the skids on the steps of the stairway or other supports that may be used to hold them in an inclined position. A represents a truck of triangular form. It may be framed together in any suitable manner, and may vary in size to suit skids of diii'erent dimensions. g is a rock-shaft journaled to the inclined base of the truck-frame in any suitable way. The truck-frame may be wood and the bearings for the rock-shaft attached; or the truck-frame may be cast with bearings formed and fitted in the metal. h is an arm projecting inopposit-e directions from the middle of the shaft g. k is a ropeattached to the end of the arm lL, and passes downward over the pulley l, which is mounted in and carried by a cross-piece on the truck A, and from thence the rope k passes up over the skid-top d.' m is a spring supported by a cross-piece spanned between the beams a a, and serves to hold up the arm h. a is a traveling pulley that has its bearing in the end of the rock-shaft, which` is bent down at right angles 011 the outside ofthe skid and track-rail c c. A corresponding pulley is carried in the same way on the opposite end of the shaft. o is a spring-catch projecting downward from the upper cross-piece b, and is designed to engage the bar p, spanned across the base of the truck-frame A. r represents a turn-button or pawl, a, series of which may be 'used to arrest and hold the truck A at different points on its passages up and down.

In the operation of my portable elevator, the skid is placed 011 the stairs in a position that will allow the blocks f to rest upon the steps. The truck is then placed at the lower end and in position to allow the traveling pulleys u to pass under the track-rails c c. 'Ihe rope k k is passed up over the top of the skid, or it may be passed up and then returned over a pulley attached at the top of the stairway. Pullingon tle free end of the rope will draw the truck A and its contents to the top of the skid, and the spring o will seize the bar p and hold the truck on a level with the top of the skid to allow its freight to be removed. In the same position the truck may 'be loaded to descend, and to free it from the catch o it is only necessary to pull on the rope 7o, the lower end of which is passed over the pulley l, and attached to the upperend of the arm h on the shaft g. Pulling the rope draws down the top end ofthe arm h and elevates the lower end of the same arm, which will strike the point of the spring-catch o and disengage it from the bar p and free the truck. The force applied to the rope k and communicated by the arm h to the rock-shaft 'g presses the pulleys u against the under sides of the track-rails c c, and causes friction to counterbalance the weight of the load on the truck. Flanges on the insides of the base of the truck-frame serve to guide it in its pas-- sages up and down over the inclined beams a a. The pressure ofthe Weight on the truck is in a perpendicular line downward, and is distributed by the inclined base of the truck to the beams a a, and consequently descends gradually.

By means of the rope, and the pulleys carried by the rock-shaft and the track-rails, a friction or brake force can be used to govern the descent of the loaded truck, and to prevent accidents. The platform of the truck is always level, and an open vessel full of fluid can be carried up and down the incline in an upright position Without spilling contents.

I claim as my invention- 1. The skid a a b b, having the track-rails c c, the cover d, the blocks j', and the springcatch o attached, substantially as described, and for the purposes specied.

2. The triangular truck A, carrying the rock-shaft'g, arm h, rope 7c, pulley l, spring m,

pulleys n, andbar p, substantially as described,

RAIMUND SEEBURGER.

Wlitnesses z HENRY HERROLD, S. A. CRANE.

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