US260254A - Geoege - Google Patents

Description

(NOMode1:) .K G. C. TEWKSBURY.

ELEVATOR.

BT05260254. Y Y Patented June 27, 1882.

UNITED STATES PATENT OFFICE.

GEORGE O'. TEWKSBURY, OF EAST ORANGE, NEW JERSEY.

ELEVATO R.

SPECIFICATION forming part of Letters Patent No. 260,254, dated June 27, 1882,

Application filed April 27, 1882. (No model.)

To all lwhom it may concern Be it known that I GEORGE C. TEWKsBURY, of East Oran ge,in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Elevators, of which the following, taken in connection with the accompanying drawings, is a specitication.

This invention relates to an improvement in that class ofelevators'commonly used in buildings for hoisting merchandise from one story thereof to another, and is specially adapted to be used in connection with the elevator for which Letters Patent of the United States Nos. 255,049, 255,050, 255,051 have already been granted to me, and to which reference may be had.

The invention consists in combining with the driving mechanism a suitable brake device for taking up the momentum of the elevator whenever it is desired to stop or change the direction of the car. It also ,relates to certain peculiarities of construction and combination of the operative parts, all of which are fully described hereinafter. Y

In the drawings, Figure 1 isa side elevation of sufficient of the mechanism to illustrate my invention. Fig. 2 is a plan of a section of Fig. 1, the cutting-plane being made to pass through dotted line y y in said Fig. l. Fig. 3 is a detached view of a portion of the operatinglever. 1

The -construction and operation of the elevating mechanism are fully set forth in the Letters Patent referred to above, and will not be repeated here.

In the accompanying drawings, the framework for upholding the operative parts is represented in part and designated by the letter A placed upon dili'erent parts thereof. The shaft B is arranged to turn in suitable bearings attached to the frameA, and carries brakepulley C and speed-pulleys D E F. Motion is head c is provided with screw-rod d, on which it is' arranged between two nuts, 3 3, and is vertically adjustable thereon in an obvious manner. Said cross-head is arranged to slide vertically up and down on the rods 4 4, Whereby the cross-head is kept in proper horizontal position and prevented from cramping. Said rod d has its bottom end connected with rod 5, which rod 5 has its opposite end in the tubeis, while the rods d, 5, and 7 are in direct ver-- tical line with each other, which should be the position of said rods whilethe drivin g-belts are on the loose pulleys-that is, while the elevator-car is at rest. From this it will be evident that when the shipper-bar G is moved in either direction in order to change the belts and set the elevator `in motion it throws the rods d, 5, and 7 out of line, thereby allowing Vthe cross-head c t5 move d own sufficiently to remove the brake-shoe a away from the wheel G and give free movement to the shaft B, while a reverse of this movement to stop the elevator brings the brake onto the wheel again, as before.

The rods d, 5, and 7 are prevented from getting cramped, and the movement of the shipper-rod Gr is greatly relieved by means of the wheel 9, which travels upon the ledge-plate l0 in an obvious manner.

What I claim, and desire to secure by Letters Patent, is

In an elevator, the combination of the driving-shaft brake and driving-pulleys mounted thereon, the shipper-rod connected to a sliding cross-head, and a brake-shoe connected to said cross-head, whereby the brake is operated by the movement of the shipper-rod in shifting the belt.

In testimony whereof I have signed this specification in presence of two Witnesses.

GEO. C. TEWKSBURY.

Witnesses:

HENRY E. BoWMAN, ARTEMAs B. SMITH.

IOO

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