US361263A - Geoegb w - Google Patents

Description

DUMB WAHM.

Patented Apr. 19, 1887.

FIGA.

CII

over the counterpoise-well.

UNITED STATES PATENT OFFICE.

GEORGE CANNON, OF POUGHKEEPSIE, NEV YORK.

SPECIFICATION forming part of Letters Patent. N o. 361.263, dated April 19, 1887.

' Application filed February 17, 1887. Serial No. 227,985. (No model.)

G shows the pulley that conducts the rope 5o To all whom it may concern/.-

Be it known that I, GEORGE W. CANNON, a citizen of the United States, residing at Poughkeepsie, county of Dutchess, and State of New York, have invented a new and useful Dumb- Waiter, of which the following is a specification. Y

My invention relates to improvements in dumb-waiters; and it consists of a combination and an arrangement of pulleys, rope, and dumb-waiter car and counterpise-weight` so arranged as to dispenseentirely with the usual hoistwheel and axle, and use only three sizes of pulleys and onecontinuous rope for operating the same. I can put upon the car another rope, connecting it with the counterpoise-weight, which is used simply as a safety appliance, which may or may not be used, at the option of the parties.

The novelty of myinvention consists in the simplicity of construction and ease of operation. By the use of one continuous rope its slack is always taken u p, and it is easily operated. My pulleys may al1 be made of the same size; but for ease of operation Iprefer to place upon the upper shelf three sizes, in or der to lessen friction and carry the ropes to their respective positions with the least possible friction.

I will now explain my invention with reference to the drawings.

Figure 1 is a plan view of'my dumbwaiter. Fig. 2 is a sectional view, looking down upon the same, showing t-he counterpoise-well at one corner thereof'. This well may be placed in any position around the car-well which convenience of construction may dictate, and

Fthe pulleys ou this shelf :may be changed ac- Vcordingly. O4

Like letters indicate like parts.

A shows the large pulley-wheel, which takes the rope from the front corner of the car-well, and carries it at any angle desired to a point vertically overone side of the pulley or pulleys on the top of the waiter-car.

B shows a pulley, taking the rope at the other front corner of the car-well and carrying` it in any desired direction to the pulley located perpendicularly downward into the weightwell, to and around the movable pulley E.

E shows the movable pulley lwhich sustains the counterpoise-weight, and to the top of which the safety-rope L, when used, may be attached.

F shows the pulley attached to the top of the car, near the middle point thereof; and in case 'of large dumb-waiters two pulleys ofthis description may be placed on top of the car and the hoist-rope passed under both of them.

G shows the car of the dumb-waiter.

H shows the continuous workingrope, one end of which is attached to the bottomA of the upper shelf, K, at I, and passes vertically down under the pulley F and over the pulley A, and downthe frontvside of the car-well under the pulleys P and O, and up the other front edge of the car-well over the pulleys B and G, and down under the movable pulley E and up to the bottom of the shelf K at the point J, where this end of the rope is fastened.

K shows the upper shelf above the car and counterpoise-well.

L shows the safety-rope, attached at one end near the pulley F to the car, and at the other end, after passing over the pulley D, it is made fast to the movable pulley E.

M shows the counterpoise-weight.

It may be seen by my construction that the counterpoise or weight well may be located on either of the three sides of the car-well, as convenience of construction may dictate, and this well may be inclosed in such manner that the block E will not revolve by any untwisting of the rope. The holes through the shelves above and below the car-well, through which the ropes work, are provided with iron thimbles.

Having thus described my invention, what I claim isl. The combination of a dumb-waiter car having connected thereto a counterbalance- Weight,lVI,with the pulleys AB C F, and pulleyblock E, arranged, as shown, upon and beneath the shelf K, and the operating-ropeH, secured to the shelf at I and passing under the pulley F, over the pulley A, and under the pulleys P and 0, and over the pulleys B and C, and under the movable block E, and secured to the shelf Kut: J, as shown and described.

2. The combination of a dumb-Waiter car,

5 having connected therewith acounterbalance- Weight, M, the pulleys A B C F, and pulleyblock E, arranged, as shown, upon and beneath XVtnesses:

over the pulley A, and under bhe pulleys l and lo O, and over the pulleys B and C, and under the movable block E, and secured. to the shelf K ab J, lche safety-rope L, and the pulley D, substantially as shown and described.

GEORGE XV. CANNON.

the shelf K, the operating-rope H, secured to F. XV. PUGSLEY, the shelf at I and passing under the pulley F, R. E. LANSING.

Images