US1297093A

US1297093A - Vehicle-brake.

Info

Publication number: US1297093A
Application number: US18223417A
Authority: US
Inventors: William C Carr
Original assignee: Individual
Current assignee: Individual
Priority date: 1917-07-23
Filing date: 1917-07-23
Publication date: 1919-03-11
Anticipated expiration: 1936-03-11

Description

w. c. CARR. VEHICLEBRAKE. APPUCATION FILED JULY 23.1917.

1,297,093. Patnted Mar. 11,1913;

WILLIAM C. CARR, OF BUFFALO, NEW YORK.

VEHICLE-BRAKE.

Specification of Letters Patent.

Patented Mar. 11, 1919.

Application filed July 23, 1917. Serial N 0. 182,234.

To all whom it may concern:

Be it known that I, WILLIAM C. CARR, a citizen of the United States, residing at Bufialo, in the county of Erie and State of New York, have invented certain new and useful Vehicle-Brakes, of which the following is a specification.

This invention relates to vehicle brakes, and more particularly to a type of brake especially adapted to motor-driven trucks.

In the operation of trucks which are driven in either direction, it is essential that the brake be equally effective whichever the direction of operation and that the brake action be equal in degree in both directions. It is also necessary in the operation of such trucks that the release be immediate whichever the direction of operation.

The object of my invention is, therefore, to provide a brake which is positive in its operation and equally effective in both directions of operation.

The drawing herewith is a side elevation of a brake-drum provided with my improved brake, the nuts of the several pivotbolts being omitted for clearness of illustration.

The brake-drum l is of the usual type. The fixed support for the brake-band and mechanism is shown at 2 and may be of any desired form of construction. The

- brake-band 3 is provided with the usual lining 4C, and the brake is shown in the released position.

Diametrically opposite the free ends of the brake-band 3 a lug 5 is rigidly secured to the outer face of the brake-band. This lug has a slot 6 which engages with a pin 7 in a standard on the fixed support 2. This lug holds the brake-band against movement in rotation but permits the necessary radial movement.

Pivoted to a standard of the fixed support 2 is a bell-crank lever having arms 8 and 9, and a lever 10 integral therewith or attached thereto for operating the same. Similarly pivoted to said standard is a bellcrank

lever having arms

11 and 12. The arms 8 and 11 are pivoted respectively to the free ends of the brake-band 3. The arms 9 and 12 are pivoted to a link 13. The

' of said brake-band,

lever 10 connects with a brake-rod. The arms 8 and 11 are of equal length, and the arms 9 and 12 are of equal length.

It will now be seen that, if the lever 10 is moved downwardly, the free ends of the brake-band 3 will be drawn toward each other equally by the arms 8 and 11, and at the same time the slot 6 will permit the lug 5 to move inwardly on the pin 7 but without rotational movement. Thus both portions of the brake act equally and the action is the same whichever direction the drum is rotated. Moreover, in addition to the equal distribution of the brake action, the release action is equal and positive with respect to both portions and dragging action is entirely eliminated.

Having thus described my invention, I claim:

1. In a brake of the type described, the combination with a brake-drum, a brakeband and a support, of two bell-crank levers pivoted to said support, an arm for actuating one of said bell-crank levers, two corresponding arms of said bell-crank levers of equal length being pivoted to the free ends a link pivoted to the other arms, which are of equal length, and means oppositely situated to the free ends of said brake-band engaging said brake-band to hold the same against movement in rotation and permitting axial movement.

2. In a brake of the type described, the combination with a brake-drum, a brakeband and a support, of two bell-crank levers. the corresponding members of which are of equal length, pivoted to said support and pivoted respectively to said brake-band, a link connecting the other arms of said bell-crank levers, an arm for actuating one of said bell-crank levers, a lug on said brakeband diametrically opposite its free ends having a slot adapted to engage a pin on said support, a pin on said support engaging in said support, whereby said brakeband is held against movement in rotation but permitted to move radially and whereby the free ends of said brake-band are acted upon equally.

WILLIAM C. CARR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.