US486718A

US486718A - Car-brake

Info

Publication number: US486718A
Authority: US
Publication date: 1892-11-22
Anticipated expiration: 1909-11-22

Description

(No Model.) 2 Sheets-Sheet 1.

- H. H. KELLEY.

CAR BRAKE.

atented Nov. 22, 1892.

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THE NORRIS PETERS 60.. PHOTO-L THO WASHINGTQN D C (No Model.) 2 Sheets-Sheet 2; H. H. KELLEY. GAR BRAKE Patented Nov. 22, 1892.

UNITED STATES PATENT OFFICE.

HARRY H. KELLEY, OF- WILLOUGHBY, OHIO.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 486,718, dated November 22, 1892. Application filed August 20, 1892. Serial No. 443,591. tNo model.)

To all whom it may concern.-

Be it known that I, HARRY H. KELLEY, of Willoughby, in the county of Lake and State of Ohio, have invented certain new and useful Improvements in Car-Brakes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to improvements in car-brakes, and more especially to the mechanism for applying or setting the brakes of street-cars, the object being to provide simple and comparatively-inexpensive mechanism, whereby the brakes are more easily and quickly applied without jarring or tearing of the parts, and whereby the purchase is increased in the application of the brakes.

With this object in view and with a view of realizing certain other advantages hereinafter indicated my invention consists in certain features of construction and in combination of parts hereinafter described, and pointed outin the claims.

In the accompanying drawings, Figure 1 is a side elevation of the machine in com pletep'osition attached to the platform of a street-car that is shown in dotted lines. Fig. 2 is a top plan of casing C. Fig. 3 isaside elevation, partly in section, of said casing and internal mechanism, the section being taken on a line centrally through the brake-chain spool. Fig. 4 is a top plan of the internal gear integral with the brake-chain spool and the working pinion, the brake-shaft upon which said pinion is mounted being shown in section. Fig. 5 is a bottom plan in horizontal section of the brakechain spool, showing the eccentricity of the spool with the axis of the internal gear and showing the attachment of the brake-chain to the larger side or belly of the eccentric spool. Figs. 6, 7, 8, and 9 are diagrammatic views illustrating the operation of the brake-chain spool and the manner in which the slack of the brake-chain is taken up and the manner in which the purchase of the machine is increased in the application of the brakes.

Referring to the drawings, A represents the platform of a street-car; B, the brake-shaft; B, the brake wheel mounted on the brakeshaft, and b the brake-wheel handle. Shaft B has mounted thereon the usual brake ratchetwheel I), that is adapted to engage ratchetpawl 17 on the endtimberof the car-platform, as heretofore.

The brake-shaft has bearing in upwardlyprojecting stud C of cap 0 of a casing (J, secured to the cap by means of screws or bolts 0 said casing with its cap being preferably of cast iron and being rigidly secured to the end timber of the platform of the car, cap 0 having lateral flanges C perforated for the passage of the securing-bolts.

On the brake-shaft within casing C is operatively mounted a pinion D, that meshes with an internal gear E integral with brakechain spool e, that is somewhat eccentric with gear E, as shown in Fig. 5, and is loosely mounted on a center-pin e',that is rigidly secured to the bottom of easing C. Spool eand internal gear E are inclosed within said casing. It will be observed that the brake-shaft, pinion, internal gear, and brake-chain spool all move in the same direction.

The brake-chain G is attached, as at g, (see Fig. 5,) to the central portion of the larger side or belly of the brake-chain spool, and the arrangement of parts is such that when the brake-chain has its full slack brake-chain spool e is in the position shown in diagram Fig. 6, wherein the greatest radius of the spool is at the point of attachment of the brakechain. F A half-revolution of the spool brings the same to the position shown in diagram Fig. L wherein the greatest radius is again at the point of attach mentof the brake-chain and in which position of the spool the slack of the brake-chain is removed or taken up. The chain has not yet been but is ready to be wound upon the spool. It will readily be observed that a still further revolution or turning of the spool (of course in the same direction) to apply the brakes will gradually decrease the radius of the spool at the point at which the brake-chain winds upon the spool, (see Figs. 8 and 9,) the result being an increase in the purchase'corresponding to the decrease of the said radius. Casing C of course has a lateral opening 0 for accommodating the location and operation of the brake-chain.

The advantages of my improved brake mechanism alluded to in the preamble of this specification,it is believed, are quite apparent. Furthermore, the mechanism occupies but .little room, and the brake-ohain spool and the gear and pinion that operatively connect said spool with the brake-shaft being inclosed, as shown and described, said operating parts are suiflciently protected against dust and dirt.

\Vhat 1 claim is- 1. The combination, with the brake-shaft and a pin on the lower end of said shaft, of a stationary pinion, brake-chain spool loose on said pin, brake-chain attached to said spool, and internal gear operative with said spool and in mesh with the aforesaid pinion, sub stantially as set forth.

2. The combination, with the brake-shaft, of a stationary pin, an eccentric brake-chain spool loose upon said pin, brake-chain attached to said spool, and means operatively connecting said spool and brake-shaft in such a manner as to cause the same to move in the same direction, substantially as set forth.

3. The combination, with the brake-shaft and pinion on the lower end of said shaft, of an internal gear in mesh with said pinion, and a spool upon which the brake-chain is adapted to wind integral with and eccentric to said internal gear, substantially as set forth.

4:- The combination, with the brake-shaft and a pinion on the lower end of said shaft, of an internal gear in mesh with said pinion, a spool operative with and eccentric to said internal gear, brake-chain attached to the larger side or belly of said eccentric spool, the arrangement of parts being such that in the application of the brakes after the slack in the chain is removed or taken up the radius at the point where the chain winds upon the spool will gradually decrease, substantially as and for the purpose set forth.

5. The combination, with a casing, brakeshaft having bearing in said casing, and a pinion on the lower end of said shaft, of a center-pin supported by said casing, a brakechain spool loosely mounted on said pin,brakechain attached to said spool, an internal gear integral with the upper end of said spool and in mesh with the aforesaid pinion, said pinion, internal gear, and brake-chain spool being all inclosed within the casing that has a lateral opening for accommodating the location and operation of the brake-chain, substantially as set forth.

6. The combination, with a casing composed of two castings, as at C O, rigidly secured to each other, the one casting constituting the cap of the casing, said cap having lateral flanges perforated for the passage of the bolts for securing the casing to the platform of the car and having an upwardly-projecting stud or member 0 of the brake-shaft having hearing in said upwardly-projecting stud, a pinion on the lower end of said shaft, a center-pin supported by said casing, a brake-chain spool loose on said pin, brake-chain attached to said spool,and internal gear integral with the upper end of the spool and in mesh with the aforesaid pinion, said pinion, gear, and spool being all inclosed within the casing and the latter having a lateral opening for accommodatingthe location and operation of the brakechain, substantially as set forth.

In testimony whereof I sign this specification, in the presence of two witnesses, this 3d day of August, 1892.

HARRY H. KELLEY.

W'itnesses:

GEo. L. FREDERICKSON, WALTER H. JOHNSON.