US736997A

US736997A - Brake.

Info

Publication number: US736997A
Application number: US14131003A
Authority: US
Inventors: George Edwin Moffett
Original assignee: Individual
Current assignee: Individual
Priority date: 1903-01-31
Filing date: 1903-01-31
Publication date: 1903-08-25
Anticipated expiration: 1920-08-25

Description

PATENTED AUG. 25, 1903.

G. E. MOFFETT.

BRAKE.

APPLICATION FILED JAN. 31. 1903.

2 SHEETS-SHEET 1.

NO MODEL.

E News PETERS 0o, Mom-mm wmwwsmw. n. c.

PATEN'I'ED AUG. 25, 1903.,

G. B. MOFPETT.

BRAKE.

APPLICATION FILED JAN. 31. 1903.

2 SHBETS'SHBET 2.

no MODEL.

UNITED STATES Fatented August 25, 1903.

i PATENT OFFICE.

BRAKE.

SPECIFICATION forming part of Letters Patent No. 736,997, dated August 25, 1903. Application filed January 31, 1903. Serial No. 141,310. (No model.)

To (LZZ whom it may concern:

Be it known that I, GEORGE EDWIN Mon- FETT, a citizen of the United States, residing at Jarilla, in the county of Otero and Territory of New Mexico, have invented a new and useful Brake, of which the following is a specification.

The present invention relates to brakes for street and other cars; and the object is to provide quick-action mechanism by means of which great braking power may be applied to the wheels, thus making it of the greatest utility in cases of emergency, said mechanism being readily applicable to a car without in any way changing the system which may be in use.

The preferred form of construction is illustrated in the accompanying drawings, where- 1n- Figure l is a topplan view of the mechanism, indicating its position upon a car. Fig. 2 is a sectional view through a car, showing the mechanism in elevation. Fig. 3 is a detail sectionalview showing the connection with the brake-lever, and Fig. 4 is a detail perspective view of the actuating-lever.

Similar reference-numerals indicate corresponding parts in all the figures of the drawings.

The brakes maybe of any desired or wellknown construction, and in the form here,- with illustrated a beam 10 is employed, having at its ends the usual shoes 11 and connected at an intermediate point to a brakelever 12. Suspended beneath the end of the car is a rocker-arm 13, the upper end of which is attached to a short shaft 14, journaled in,

suitable bearings 15. The lower end of this rocker-arm is connected with the brake-lever by means of a draft-rod 16, that is extensible, being made up of sections that are connected by means of a turn-buckle 17.

The operating means for the brake is in the form of a toggle made up of

links

18 and 19,

pivoted together at 20, one end of the link 18' being pivoted to a hanger 21, secured to the under side of the car-frame, the outer end of the link 19 being attached to the rocker-arm at an intermediate point. The link 18 is extended beyond the pivotal connection'20 to form an actuating-lever 22, the free end of which carries an upstanding stem 23, that lever.

projects through and above the floor of the car, and has at its upper end a foot-piece 24. It will be observed that the plane of movement of the togglelinks'is vertical and that the outer link of the toggle moves away from the brake when depressed. The stem is thus located on the front platform of the car, and its front edge is provided with a rack 25, arranged to be engaged by a dog 26, that is mounted upon the shaft 14. The lever 22 preferably has a broad bearing, and to this end it is made up of two limbs which straddle the hanger. The link 19 is also preferably made double in order to gain strength and to prevent any tendency of the members twisting. With this structure the brake maybe readily applied by sim ply pressing downwardly upon the 'footlever. This will cause the links to move toward an alined relation, thereby forcing the rocker-arm forward, and consequently swinging the brakelever. Tremendous power is obtained by the arrangement of the parts. In the first place the toggle multiplies the power, and this is increased by the leverage obtained by the extension of the link 18. While some of this power is lost at the rocker-arm, because of the connection of the toggle-link 19 being nearer than that of the draft-rod to the pivot of the arm, its power is again increased at the brake- It will furthermore be understood that because of the toggle a maximum movement of the brake-shoes is obtained during the first part of the application of power to the foot-lever, and the stroke continues the movement of the brakeshoe decreases,

while the power delivered to the wheel increases. It has been estimated by competent persons that a driver can easily apply sufficient Weight to the foot-lever to completely stop the rotation of the wheels even with a heavily-loaded car. It will therefore be apparent that while the mechanism can be used for ordinary traffic it is especially advantageous in cases of emergency. The dog 26 is not necessarily employed at all times and can be thrown forwardly and out of engagement with the rack. The structure is very simple and-can be manufactured at comparatively small cost. It may be easily applied, and

the elements are such that they are not likely The action is certain to become deranged.

and rapid, and it will be evident that it is convenient and easy to operate.

From the foregoing it is thought that the construction, operation, and many advantages of the herein-described invention will be apparent to those skilled in the art without further description, and it will be understood that various changes in the size, shape, proportion, and minor details of construction may be resorted to without departing from the spiritor sacrificing any of the advantages of the invention. 7

What is claimed is 1. The combination with abrake, of operating mechanism therefor, said mechanism comprising a toggle, one of the links of which is extended to form an actuatinglever, a stationary pivotal support for the actuatinglever, and a connection between the other link and the brake.

2. The combination with a brake, of a toggle having a stationary support at one end and having its opposite end movable away from the brake, and a draft-rod connection between the movable end and the brake.

3. The combination with abrake, of a toggle, one of thelinks of which is pivoted nearest the brake and is extended away from the same to form an actuating-lever, the other link being pivoted to an intermediate portion of the lever and movable away from the brake when said lever is moved in one direction, and a draft-rod connection between the prising a toggle, one of the links of which is extended to form an actuating-lever and is provided with an upstanding stem, and a connection between the toggle and the brake.

6. The combination with a brake, of operating mechanism therefor, said mechanism comprising a toggle, one of the links of which is extended to form an actuating-lever that is provided with an upstanding stem, said stem having a rack, and a dog arranged to engage the rack.

7. The combination with a brake-lever, of a rocker-arm, a draft-rod connecting the arm and brake-lever, a toggle connected with the rocker-arm, and means for actuating the toggle.

8. The combination with a brake-lever, of a rocker-arm suspended from its upper end, an extensible draft-rod connecting the lower end of the arm to the brake-lever, and toggle-links, one of which is connected to an intermediate portion of the rocker-arm, the other link being extended to form an actuating-lever.

9. The combination with a brake, of a rocker-arm supported at one end, a draft connection between the arm and the brake, toggle-links, one of which is connected to the rocker -'arm, and means for actuating the links.

10. The combination with a brake, of a rocker-arm supported at one end, a draft-rod connecting the other end of the arm and the brake, toggle-links, one of which is connected to an intermediate portion of the rocker-arm, and means for actuating the links.

11. The combination with brake mechanism, of a draft-rod connected to the mechanism, a toggle having a connection with the draft-rod, one of the links of said toggle being extended at one end to form an actuat- GEORGE EDWIN MOFFETT.

Witnesses:

A. J. DONNES, ALLEN OULVER.