US375146A - emerick - Google Patents

Description

6 Sheets-Sheet l.

G. M. EM'ERIGK. DUMB WAITER (No Model.)

No. 375,146. Patented Dec. 20, 1887.

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No. 375.146. Patented Dec. 20, 1887.

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UNITED STATES PATENT OFFICE.

GARRETT M. EMERIOK, OF BROOKLYN, ASSIGNOR TO THE BUTLER HARD- IVARE COMPANY, OF NE\V YORK, N. Y.

DUMB-WAITER.

SPECIFICATION forming part of Letters Patent No. 375,146, dated December 20, 1887.

Application filed July 9, 1887. Serial No. 143,844. (No model.)

To aZZ whom it may concern:

Be it known that I, GARRETT M. EMERICK, of Brooklyn, in the county of Kings and State of NewYork, have invented a new and Improved DumbW'aiter, of which the following is a full, clear, and exact description.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation of my new and improved dumb-waiter, showing the floors in section. Fig. 2 is a sectional elevation taken on the linex w of Fig. 1. Fig. 3 is an enlarged plan view. Fig. 4 is a sectional View on the Fig. 5 is an enlarged side elevation of the power mechanism and the ropes. Fig. 6 is a broken sectional elevation on line y y of Fig. 5, looking to the right. Figs. 7 and S are enlarged sectional and broken elevations of the drum H and guide-pulley M. Figs. 9 and V 10 are opposite enlarged sectional views of the guide pulley M and drum H.

The invention will first be described in connection with the drawings, and then pointed out in the claims.

A represents the main powershaft, journaled in suitable bearings in the standards B B, mounted upon the floor JV. To one end of the shaft A is secured the wheel 0, over which passes the endless rope D, by which the shaft A is revolved. The revolution of the shaft A communicates motion to the shaft E by two gear-wheels, F G, secured, respectively, upon the shafts A E.

Upon the shaft E is secured the drum II, over and around which pass the two ropes J J, one end of each of which is attached to the dumb-waiter car K, which runs between upright guide-posts L L in the usual manner. From the car K the ropes J pass once around the drum H, thence over the pulley M, and are attached to the weight N, which acts as a counterbalance to the car K. The weight N moves in a well, O, constructed in any part of the dumb-waiter well, and one of the ropes J is given a little slack, so thatthe other will bear all the weight, so that in case it should break the car and weight will be prevented from falling by the slack rope. In this manner the slack rope becomes a perfect safeguard against the falling of the car, for when the workingrope breaks a new one must be put on. The ropes J J are spread at the drum H, and the pulley M is formed with flanges in" m" to prevent them from running too far apart, as will be understood from Figs. 8 and 9. In this manner the portions of the ropesJJ which reach from the drum to the car are kept from spreading, which would be liable to shift the weight of the car from one of the ropes to the other, and thus necessitate too much slack in the safety-rope.

Upon the shaft A is secured the brakedrum P, to which are applied the brake-levers Q Q, for regulating the descent of the car and for stopping and holding it at any desired position. The lever Q is pivoted at d, and is curved at d to fit the drum 1, and connected to its upper end by the pivot h is the lever B, for closing the brake-levers upon the drum. The lever Q is pivoted atf, is curved atf to fit the drum I, and is curved again at its upper end, as shown atf Fig. 6, to form a cam for the lever B to act upon when its free end is drawn downward for closing the levers Q Q upon the drum P. The said levers Q Q are normally held apart by the spring S, placed between them below the shaft A. The lever B is operated by an endless cord, R, passed over the pulleys jj, and said lever is formed or provided with a curved shoe, 2', which acts upon the cam f so that when the outer end of the lever It is drawn downward the upper ends of both brake-levers will be drawn together upon the drum 1?. In this manner the descent of the car K may be very easily controlled, and it may be stopped and held at any desired position even when heavily loaded.

The drum H is constructed, as shown in Fig. 7, with a circular body, h, of hardrubber, to prevent the ropes J from slipping and to reduce the wear upon the said ropes to the minimum. A core, W, of iron, is'cast with afixed flange, 71/ at one end, and with the ribs h and central passage for the shaft E. The body h, of hard rubber, is formed with recesses to fit the ribs h, so that when placed upon the iron core the rubber cannot turn upon the core.

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The flange its, opposite to the flange k fits upon the end of the core h and against the end of the rubber body, and is held in place by the bolts h, passed through the flanges and rubber body, as will be clearly understood from Figs. 7 and 10.

The pulley M is formed mainly of the castiron body in, formed with the flange m This body is secured upon the shaft m, and upon the body at are placed the segmental wooden blocks m Upon the end of the body m is placed the opposite fiange,m,which fits against the ends of the blocks m and this flange and the blocks are held in place by the bolts m passed through the flanges and blocks, as shown clearly in Figs. 8 and 9.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. In mechanism for operating a dumb waiter, a main power-shaft geared to a shalt, E, and provided with a drive-wheel and endless rope, in combination with a drum, H, sc-

' cured to the shaft E, the endless ropes J, the

car K, counterweight N, and guide-pulley M, arranged back of and in line with the drum H, for guiding the ropesJ from the drum H to the counter-weight, substantially as described.

2. In a dumb-waiter, the two ropes J, both attached to the car and passed over the drum H and the guide-pulley M and attached to the weight N, one of the ropes J of greater length than the other between the car and weight, substantially as described.

3. In a dumb-waiter, the pulley M, formed with flanges m m, in combination with the drum H and the two ropes J, applied to the drum in such manner that the portions of the ropes which reach to the car pass between those portions which reach to the weight, substantially as described.

4. The shaft A, provided with the brakedrum P, in combination with the brake-levers Q Q, lever B, pulleyj, held above the lever, and the rope R, passed over the said pulley j and attached to the said brake-lever, substantially as described.

5. The shaft A, provided with the brakedrum P, and the brake-levers Q Q, pivoted at their lower ends to the standards B and formed with curves adjacent to the drum P, the lever Q being formed at its upper end with the cam f", in combination with the lever B, pivoted to the upper end of the lever Q and formed or provided with the shoe 2', to act upon the cam f, substantially as described.

6. The drum H, composed of the core W, the circular body h, of hard rubber, and the end flanges, h if, of greater radius than the body h, substantially as described.

7. The core 7L2, formed with ribs h and with the flange h, in combination with the body h, flange h of greater radius than the body h, and the bolts h, substantially as described.

GARRETT M. EMERIGK.

\Vitnesses:

MARoUs WALKER, H. A. WEST.

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