US507837A - Elevator - Google Patents

Description

(No Model.)

B. W. PARMENTER.

ELEVATOR.

Patented Oct. 31,1893.

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UNITED STATES PATENT OFFICE.

ROBERT WILSON PARMENTER, OF YUTAN, NEBRASKA.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 507,837, dated October 31, 1893.

Application filed June 10, 1893- To all whom it may concern.-

7 Be it known that I, ROBERT WILSON PAR- MENTER, of Yutan, in the county of Saunders and State of Nebraska, have invented a new and Improved Elevator, of which thefollowing is a full, clear, and exact description.

My invention relates to improvements in elevators, and the object of my invention is to produce an elevator which is adapted for use on one floor only of a building, but which may be made to raise a person or a party of people to any necessary height in a room,

and may also be propelled to different parts of a room, thus serving as a carriage, and also enabling articles at different elevations to be reached, and on account of its traveling qualities I call the elevator a bicycle elevator.

A further object of my invention is to.pro-' duce an elevator of this kind of very simple and durable construction, and to provide mechanism by which it may be easily propelled and perfectly controlled.

To these ends, my invention consists in certain features of construction and combinations of parts, which will be hereinafter fully described and claimed.

Figure l is a broken side elevation of the elevator embodying my invention. Fig. 2 is a vertical section on the line 2-2 of Fig. 1. Fig. 3 is a sectional plan on the line 33 of Fig. 1; and Fig. 4 is a detail sectional View of one of the wheels which carry the elevator and which run upon the tracks.

The elevator is provided with an upright frame comprising the two hollow posts 10 and connecting cross bars 11, arranged at top and bottom, and the posts 10 are adapted to carry a counterbalance as hereinafter described, and their outer sides are preferably covered by screening 10". At the top and bottom of the elevator frame are wheels 12, which are journaled on suitable supports and have grooved faces, these being rubber lined, as shown at 13 in Fig.4, and the wheels run upon parallel tracks 14 and 15, which are arranged respectively on the floor and ceiling of the room in which the elevator is located, the upper track 15 being secured to suitable hangers 16, and the lower track 14 being mounted on screws 17 which project through the floor and through floor plates 18, the

Serial No. 477.198. ,(No model-l screws being provided with suitable nuts 19 by which they may be raised and the height of the track 14 regulated so that the wheels 12 may fit snugly on both the upper and lower tracks. The upper wheels 12 are mounted in vertically adjustable supports 20, the adjustment being'effected by means of slots 21 in the supports, and screws 22, which project through the slots and into the posts 10, but any suitable means for adjusting the wheels 12 at either the upper or lower ends of the frame may be used.

The elevator frame carries a vertically movable car 23, which may be of any usual construction, but which is preferably made as shown, the construction comprisinga suitable platform and a guard rail 24 formed of screening and provided with an opening 25 for ingress and egress, as shown in Fig. 3. The car is provided with suitable bails 26, to which the hoisting cable 27 is attached, and this cable extends upward over a suitable drum 28, which is carried by a shaft- 29 journaled in the upper portion of the frame, and on the shaft at one end, is a pulley 30, to which a cable 31 is secured, and the cable has its free end attached to a counterbalance 32, which moves up and down in one of the posts 10, and balances the car 23 so that the latter may be moved easily.

To prevent rattling, the counterbalance 32 may be fitted into grooves in the posts 10 in the usual way. To further facil itate thevmovement of the car it may, if desired, be provided with anti-friction rollers of the usual kind, which run on the posts 10. a The shaft 29 is provided with a gear whee 33, driven by a pinion 34 on the shaft 35, which is journaled in suitable supports and lies parallel with the shaft 29, the shaft 35 having thereon a suitable pulley 36 over which the rope 37 runs, and this rope which is endless, passes beneath pulleys 38 at the lower end of the elevator frame, these pulleys being preferably journaled in vertically adjustable supports 39, so that the position of the pulleys may be changed to give the rope 37 the necessary tension. On the shaft with one of the driving wheels 12, at the bottom of the frame is a sprocket wheel 40, and a similar wheel41 is arranged vertically above it at the upper end of the frame and in a suitable ver- ICC tically adjustable hanger 42. These two sprocket wheels are connected by a chain 43, which also engages a sprocket wheel 44 on the elevator car 23, the wheel 44 being secured to a crank shaft 45, which is journaled in the car and connects by a pitman 45 with a treadle 46, this being secured to a shaft 47, which is journaled horizontally in the car floor, see Fig. 3, and which extends across an opening 48 in which the treadle 46 swings. The treadle 46 may be of any usual kind, but is preferably arranged substantially like the treadle of a sewing machine, and by working it up and down, the crank shaft 45 is revolved, the sprocket wheel 44 turned, and a movement imparted to the chain 43 which turns the sprocket wheels 40 and 41, and revolves one of the driving wheels 12, and this by friction on the track, propels the entire structure of the elevator.

The chain 43 has one member clasped loosely at a point near the sprocket wheel 44 bya roller clutch 49, which may be of any suitable kind, and which is carried at the lower end of a lever 50, this being journaled on the floor of the car 23, and having its upper end arranged to swing opposite the notched quadrant 51 of the customary kind, and the upper end of the lever is provided with the usual retaining latch 52, to engage the quadrant and hold the lever in the desired position.

It will be observed by reference to Fig. 1, that by swinging the lever in a manner to hold one member of the chain 43 out of engagement with the sprocket wheel 44, the chain and sprocket wheel may be easily turned so as to propel the elevator, but by swinging the lever in a way to force the said chain member into engagement with the sprocketwheel, the sprocket wheel will be engaged on opposite sides by the chain, and will therefore be locked so that the elevator remains in a stationary position. To propel the elevator it is only necessary to work the treadle 46 as described, and to raise or lower the car the rope 37 is pulled and this turns the pulley 36 and shaft 35, which shaft by means of the pinion 34 and gear wheel 33, turns the shaft 29 and hoisting drum 28.

It will be understood that the tracks 14 and 15 on which the elevator runs may be curved and extend in any desired direction or locality, and the elevator will follow the track.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. An elevator, comprising a portable upright frame mounted on wheels, a verticallymovable car carried by the elevator frame, means for operating said carand a sprocket wheel and chain mechanism operated from the car and adapted to revolve one of the driving wheels of the frame, substantiallyas specified.

2. The combination, with the portable frame, of the vertically movable car therein, supporting wheels for the frame, sprocket wheels arranged at the upper and lower portions of the frame, one of the wheels being connected with a supporting wheel of the frame, a sprocket chain connected with the Wheels and extending through the car, and a treadle-operated sprocket wheel j ournaled on the car and engaging the chain, substantially as specified.

3. The combination, of the portable frame mounted on wheels, the sprocket wheels at the upper and lower portions of the frame, the driving connection between one of the sprocket wheels and the supporting wheel of the frame, the verticallymovable car, the sprocket wheel journaled on the car and engaging the chain, and a lever mechanism to throw one member of the chain into and out of engagement with the sprocket wheel on the car, substantially as specified.

ROBERT WILSON PARMENTER.

\Vitnesses:

HENRY J. BARKENS, Gno. CARPENTER.

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