US694393A - Brake mechanism for vehicles. - Google Patents

Description

No. 694,393. Patented Mar. 4, I902.

A. L. LARSON. BRAKE MECHANISM FOR VEHICLES.

(Application filed May 8, 1899.)

(No Model.)

ALBERT L. LARSON, OF CHICAGO,

ATENT Fries.

ILLINOIS, ASSIGNOR TO OSCAR J.

FRIEDMAN.

BRAKE MECHANISM FOR VEHICLES.

SPECIFICATION forming part of Letters Patent No. 694,393, dated March 4, 1902. Application filed May 3, 1899. Serial No. 715,458. (No model.)

To aZZ whom itmay concern:

Be it known that I, ALBERT L. LARSON, a citizen of the United States, residing at Chicago, in the county of (look and State of Illinois, have invented a certain new and useful Improvement in Braking Mechanism, (Case N o. 1,) of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to braking mechanism, and has for its particular object the improvement in the construction of braking appliances employed upon motor vehicles, although I do not wish to be limited to the precise use to which the devices of my invention are put. 7

My invention has for its object the provision of an improved foot-lever for operating the brake-cable, and thereby the brake-shoes, improved mechanism being associated with the foot-lever for locking the foot-lever in position to maintain the brake-shoes in engagement with the brake wheel or pulley, the foot-plate being so associated with the looking device that by properly directing the force applied to the foot-plate the parts of the looking device may readily be released or engaged.

I will explain my invention more particularly by reference to the accompanying drawing, in which Figure 1 is a horizontal sectional View of my improved braking appliance operatively associated with an electric motor. Fig. 2 is a side elevation showing my improved braking appliance and the parts immediately associated therewith. Fig. 3 is a sectional view on line 3 3 of Fig. 1. Fig. 4 is an end elevation of the foot-lever mechanism shown in Fig. 2. Fig. 5 is an enlarged elevation of the mechanism shown in Fig. 4.

Like letters indicate like parts in the different figures.

The motor a (in this instance an electric motor) may be of any suitable construction. In this instance the shaft 1) of the motor is provided with a pinion 0, whose teeth are formed, preferably, of rawhide inclosed by end plates 61 0?, preferably of brass. The shaft Z) has a rotating element or brake-pulley 6, made, preferably, of low-grade steel, secured thereto and rotatable therewith. This brake pulley is preferably inclosed in the same casing with the motor, the longitudinal portion f and the end portion 9 of the said casing only being shown, the end portion g being in the form of a cap secured to the longitudinal portionf. An extension h of the cap g also forms a bearing for the shaft. The journal-bolts i i pass through the cap g and constitute shafts for the segmental brake-shoes 7c is, made,

preferably, of gumm'etal, a raised portion I being provided to remove the opposing surfaces of the brake-shoes from the inner ra-' dial wall of the cap.

I prefer to provide individual separated axes of rotation for the brake-shoes, as by this means I am enabled to simplify the construction of the pivoted ends of the brakeshoes; but I do not desire to be'limited to this precise arrangement. Spring mechanism m is employed for normally maintaining the brake-shoes 7:; out of engagement with the frictionpulley 0. Opposed extensions 12 n are provided upon the contiguous free ends of the brake-shoes, these extensions being provided with displaced pivotal connections 0 0 with a link 19. The spring m is heavy and is interposed between the free ends of the brake-shoes, the said spring preferably engaging at one end an inner extension 7?. and at the other end directly with the free end of the opposed brake-shoe. The link 19 is elon= gated and extends through a slot in the pe= ripheral wall of the cap g, the other free end of the extension of the said link being connected with a suitable actuating means.

I will now describe myimproved means for actuating the brake-shoes. A cord or connection r is attached at one end to the extension of the linkp and at the other end to a bell-crank lover s, pivoted at its elbow to the perch member t of a motor-vehicle. The upper end of the bell-crank lever is connected by means of a cord or cable passing over an idler secured to the bottom of the vehiclebody, this cord being connected at the other end to a foot-lever a, which may be bent, a portion of this footleverextending through an opening in the floor of the vehicle, a footplate 1; being pivotally secured to therupper end of the said extension of the foot-lever.-

neath the floor of the vehicle, the teeth of which are opposed to the engaging nose of the dog or pawl .00. A leaf-spring 2 may be employed positively to exert a turning effort upon the foot-plate in a direction which tends.

to cause the engagement between the lockingdog and rack, so that when the brake is applied to the brake-pulley or other rotating portion the said spring positively maintains the engagement between the locking-dog and rack, whereby the brake is maintained in its applied position. In order to release the brake, the foot-plate is rotated in a direction to counteract the action of the leaf-spring, in which movement the disengagement between the dog and rack is effected, permitting the elevation of the foot-plate, and thereby the release of the brake-shoes.

By employing abell-crank 5 upon the perch of the vehicle and connecting the said bellcrank with the foot-lever by means of a cord which passes over a pulley mounted underneath the floor of the vehicle no allowance need be made for relative movement between the vehicle and the perch, whereby the cable uniting the said bell-crank and foot-lever may be made taut. The foot-lever mechanism may be employed in connection with other styles of braking mechanism than that shown and the precise construction of the foot-lever mechanism,and particularly the construction of the lever u, may be modified, and I do not, therefore, wish to be limited to the precise construction shown.

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

1. In a brake actuating mechanism, the

combination with a brake-actuating lever, of a foot-receiving portion '0 having pivotal connection therewith, a locking member w secured to the portion '0 and rotatable therewith about the axis of rotation thereof and thereby with relation to the brake-actuating lever, and a second lockin g niemberg opposed to the locking member as, said portion 4; serving when rotated to rotate the locking member .70 with relation to the said lever away from or toward the locking mem ber y,sulostantially as described.

2. In abrake-actuating foot-lever, the combination with a lever u, of a plate 0 having pivotal connection with the said lever, a locking-dog it; carried by the footplate, and a locking-rack 'y opposed to the said dog, the said dog being adapted by the rotation of the foot-plate upon the said lever to bring the said dog into and out of engagement with the said rack, substantially as described.

3. In abrake-actuating foot-lever, the combination with a lever to, of a plate U having pivotal connection with the said lever, a lock ing-dog m carried by the foot-plate, a lockingrack y opposed to the said dog, the said dog being adapted by the rotation of the footplate upon the said lever to bring the said dog into and out of engagement with the said rack, and a spring for thrusting the said dog into engagement with the said rack, substantially as described.

-t. In a brake-actuating foot-lever, the.combination with a lever it, of a plate Q7 having pivotal connection with the said lever, a locking-dog 00 carried by the footplate, a lockingrack y opposed to the said dog, the said dog being adapted by the rotation of the footplate upon the said lever to bring the said dog into and out of engagement with the said rack, and a spring for thrusting the footplate and the contiguous end of the said lever upwardly, substantially as described.

In witness whereof I hereunto subscribe my name this 1st day of May, A. D. 1899.

ALBERT L. LARSON. Witnesses:

GEORGE L. CRAGG, CHARLEs E. HUBERT.

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