US241538A - Car-brake - Google Patents

Description

(NivModl.) i "2 Sheets--Sheet' 1. V

W. HADDOGKA Car Brake i vPatented May/17,1881.

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W. H A D D 0 C K.

Car Brake.

No. 241,588. Pateqted May17,1881.

UNITED STATES PATENT OFFICE.,

woRcEs'rER HADDOCK, OF CINCINNATI, OHIO, ASSIGNOB. OF ONE-HALF TO EDWARD F. ABBOTT, OF COVINGTON, KENTUCKY.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 241,538, dated May 17, 1881..

Application filed September 30, 1880. (No model.)

To all whom it may concern:

Beit known that I, WORCESTER HADDocK, of Cincinnati, in Hamiltoncounty, and State of Ohio, have invented certain new and useful Improvements in Street-Car Brakes, of which the following is a specification.

A great many accidents occur from the breaking of some part of the brake when the car is going down an incline, and the object of my invention is to prevent such accident; and my invention consists in such a construction, hereinafter described, as to accomplish this object.

In the accompanying drawings, Figure'l represents a central longitudinal section through a car. around which the brake-chains wind. Fig. 3 represents a vertical central section through Fig. 2. Fig. et is a plan view, showing the arrangement of the brake rods and levers.

A is the drum, which is attached to a rod or shaft, A', to which latter is attached a hand wheel or crank to be operated by thebrakeman. A rod or pin, I, is screwed entirely through the upper end of this drum, and nuts a are screwed onto either end of said pin I. This pin is screwed through the drum, so that should one end of the pin be brokenoff the pin cannot slip through the drum.

B is the main brake-chain, one end of which is connected to one end of the pin I and between the drum and the nut a', and the other end of said chain is connected to the brake-rod E, which, in turn, is connected to one end of the usual brake-lever, E. The latter is fulcrumed to the car by the bolt c, provided with a suitable head to prevent the lever E from 4falling to the ground.

C is an auxiliary or safety chain, one end of which is connected to the end of the pin I, opposite the end to which the chain B is attached, and this end of the said safety-chain C is be tween the drum and nut a'. The other end of the chain C is connected to the auxiliary brakerod D, which latter is attached to the end of the brake-lever E', and near the point where the rod E is connected to said brake-lever. The chain C is prevented from dragging on the ground by the spiral spring H, which is attached to the under side of the car. The spiral spring is preferable to any other form of support, as it will permit the chain C to be Fig. 2 represents the drum or shaft drawn forward as it is wound around the drum A without ybreaking it, (the spring,) and will immediately draw the chain C again up toward the bottom of the car, and prevent this chain from dragging when the latter is unwound from the brake.

The brake-shoes F are attached to the rod F', which is connected to the brake-lever E by the rod F2, in the usual manner. 6o

The manner in which my invention operates and its principal points of advantage are as follows:

The brake operates, in the usual manner, through the chain B and rod E, unless one ot' 65 these should break, in which event my invention will come into play. Suppose the car to be going down an incline and the chain B or rod .E to break, the chain C will wind around the drum A, and, through the medium of the 7o rod D, will operate on the brake-lever E in the manner as did the chain B and rod E. Thus no accident can occur from the breakingof the main brake chain or rod. y

The manner in which the ends of the chains are attached to the drum Ais a great improvement over the ordinary method, and forms one feature of myinvention. Ordinarily the brakechain isv attached to the drum by means of an eye projecting from the drum, and this eye is 8o very liable to be .broken olf. Instead of eyes I use a pin, I, as mentioned, which is screwed entirely through the drum, and projects a short distance from either side of the drum, as shown in Fig. 3. The chains B and C are attached one to either end of this pin I, and held in po sition against the drum by the nuts a', screwed onto the ends of said pin, as shown in Fig. 2. By this construction it will be seen that the chains are held closely against the drum, and 9o the ends of the pins I are therefore not so liable to break as eyes would be, for in the latter case the chains are connected to the eyes at a greater distance from the drum than in the case of the employment of the eyes, as shown; but should one end ot' the pin I be broken oft' it will not affect the other end, as the pin, being screwed through the drum, cannot be pulled through.

What I claim as new, and desire to secure :on by Letters Patent, is

1. In a car-brake, the combination of the main brake-chain B, rod E, and the auxiliary chain G and rod D, substantially as and for the purposes specified.

2. The combination of the brake-lever E',

rods E and D, chains B and C, and the drum bination with the chains B and C, the latter.

being held on said pin by the nuts a', substantially as and for the purposes specified.

4. The drum A, provided with the piu I, screwed entirely through the said drum, in combination with the chains B and C, the latter being held on said pin by the nuts a', brakeshoes and brake-lever E', and connecting and operating mechanism, substantially as and for the purposes set forth.

5. The combination of the drum A, connected with the brake Wheel or crank, and provided with pin I, screwed through said drum, the

chains B and C, rods E and D, and-the brakelever Ef, substantially/'as and for thepurposes specified.

6. The combination of the drum A,eonnect ed with the brake wheel or crank and provided With pin I, screwed through said drum, the chains *B and C, rodsE and D,Ibrakelever E', brakefshoes, car-frame, and wheels, and connect-in g and operating mechanism, substantially as and for the purposes set forth.

7. The combination of the vertical drum A and the two brake-chains B C, the latter conneeted to the drum, on opposite sides thereof and in the same horizontal plane, substantially as and for the purposes specified.

S. The combination of the main brake-chain B, rod E, and the auxiliary chain C and rod D, and a winding mechanism, for the purposes set forth.

WORCESTER HA'DDOG'K.

Witnesses:

A. S. LUDLoW, E. R. HILL.

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