US707331A - Car-brake. - Google Patents

Description

No. 707.331. Patented Aug. I9, 1902.

- w. HOUSE.

CAB BRAKE.

Application filed Jan. 16, 1902.;

(No Model.) 2 Sheets-Sheet l.

WITNESSES [N VENT OR Max I.

AHORAZEY.

Patented Aug. l9, I902. W. HOUSE.

GAR BRAKE.

(Application filed Jan. 16, 1902.)

2 Sheets-Sheet 2.

(Nu Model.)

' IN VEN TOR WITNESSES."-

n. u. c.

. NrrED TATES PATENT OFFICE:

WILLIAM HOUSE, OF SYRACUSE, NEW YORK.

CAR-BRAK E.

. SPECIFICATION. forming part of Letters Patent No.; 707,331, dated August 19, 1902.

Application filed January 16. 1902. gel-i511 NO- 89,93 (NO del- To all whom it may concern:

Be it known that 1, WILLIAM HOUSE, a citizen of the United States, and a resident of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in Gar-Brakes, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to the class of carbrakes in which the braking action is obtained by means of rollers forced into fric-" tional contact with the treads of the carwheels and track-rails adjacent thereto,which contacts subject the rollers to strains reverse from the rotation of the car-wheels.

The object of this invention is to provide a car-brake which shall be simple in construction and efficient and durable in operation; and to that end the invention consists in the improved construction and combination of parts hereinafter described and claimed. In the annexed drawings, Figure 1 is a verticallongitudinal section of myimproved carbrake shown in normal position. Fig. 2 shows the same in operative position. Fig. 3 is a plan View of said car-brake. Fig. 4 is an enlarged detail View of the hanger shown partly in section, and Fig. 5 is a diagrammatic view illustrating the action of the brake.

Similar letters of reference indicate corresponding parts.

' A A denote the car-wheels, upon the axles of which the car-truck O is mounted.

a a represent the brake-rollers, which are pivoted to transverse shafts 'i, supported on the lower or free ends of hangers b b, pivotally connected to the car-truck, as at b. The

rollers (t a are disposed between and in proximity to the front and rear wheels of the truck. The said hangers are capable of swingingin the direction of the length of the truck, and in their said movement they carry the brake-rollers to and from simultaneous contact with the treads of the car-wheels and trackt. When forced into said contact while the car is in motion, the friction of the peripheries of the wheels upon those of the rollers causes said rollers to turn in opposite direction from the wheels, and the friction of these reversely-rotating brake-rollers upon the track produces a resistance to the movein'Fig. 4; of the drawings.

ment of thecar-wheels and a corresponding braking force to the car. The brake-rollers are preferably made smaller indiameter than the car-wheels in orderto cause the former to be rotated at greater velocity than the wheels when in contact therewith. Said increased velocity causes the brake-rollers to obtain a quicker and firmer grip on the track 2%, and thus augment the efficiency of their braking action.

I preferably make each of the hangers 1) extensible. by forming it of. two separate end portions coupled together in a case d,'formed on the upper end portion and containing a spiral expansion-spring e,which surrounds the iuclosed portion of the hanger and bears with its upper end on a head f, formed on the said iuclosed portion of the hanger, while the lower end of said spring bears on a nut n, which is attached to a screw-threaded portion n on the lower end of the case cl, as shown Said spring-couplings of the hangers serve to lift the brakerollers from the track in the withdrawal of said rollers from contact with the car-wheels.

Various means maybe employed for setting the rollers a a into and out of braking positions, and I therefore do not limit myself in that respect. The means illustrated in the annexed drawings consist of a lever f, pivioted at, or near the center of its length to a said chains are wound and unwound by means "ofsuitable handles h, attached to said posts for turning them. To one of the shafts t' is attachedan upwardly-extending arm j, the upper end of which is connected bya rod Zto the lever f, as shown more clearly in .Fig. 3 of the drawings. A rod 0 is connected at one end to the other of the shafts t' and pivoted at the opposite end to the arm j ata pointin-. termediate the ends ofsaid arm, as seen at j in Fig. l of the drawings. a By turning the brake-post h at the front end of the car the lever f is caused to swing the arm in a direction which carries the brake-rollers a a, to the car-Wheels A A and simultaneously in contact with the track t, as shown in Fig. 2

of the drawings. A reverse movement of the aforesaid brakepost releases the lever f, which is then carried back to its normal position by a spring 5. (Shown in Fig. 3 of the drawings.) This carries the brake rollers from the car-wheels and allows the springcouplings of the hangers to lift said rollers from the track.

One of the great advantages of this class of car-brake is derived from the rotation of the brake-rollers, which causes said rollers to sn 0- cessively present different braking-surfaces, and thus prolong the life of the brake.

What I claim as my invention is 1. The combination, with a car-truck, of extensible hangers pivotally connected to the truck, springs contracting said hangers, rollers pivoted to the free ends of said hangers,

and mechanism for imparting motion to the hangers to carry the rollers to and from simultaneous contact with the car-Wheels and track as set forth.

2. The combination, with a car-truck, of hangers pivotally connected to said truck and movable vertically toward and from the trackrails, springs lifting said hangers, brakerollers pivotally supported on the lower ends of said hangers, means for swinging the hangers toward and from the car-wheels, and a coupling transmitting simultaneous move* ment to the hangers as set forth.

WILLIAM HOUSE.

Witnesses:

J. J. LAASS, J. J. WEKENBAEL.

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