US556673A - Charles p - Google Patents

Description

(-No Model.)

0. P. HARTMAN & J. H. STROUSE. AUTOMATIC WAGON BRAKE.

No. 556,673. Patented Mar. 17, 1896.

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UNITED STATES CHARLES P.

PATENT IIARTMAN AND JAMES H. STROUSE, OF ELMIRA, NEXV YORK,

ASSIGNORS 0F ONE-THIRD TO BENJAMIN F. SAMPSELL, OF SAME PLACE.

AUTOMATIC WAGON-BRAKE.

SPECIFICATION forming part of Letters Patent No. 556,678, dated March 17, 1896.

Application filed January 14, 1896. Serial No. 575,439. (No model.)

To a ZZ whom it may concern.-

Be itknown that we, CHARLES P. HARTMAN and JAMES II. STROUSE, citizens of the United States, residing at Elmira, in the county of Chemung and State of New York,have invented a new and useful Improvement in Automatic Nagon-Brakes, of which the followin g is a specification.

The object of our invention is to provide a wagon with a brake that will. automatically set itself immediately the wagon starts down a declivity, the brake being set more strongly as the grade increases. Our brake may also be controlled in. the usual way by the hand or foot, and is suitable for use upon farm, road, transportation, express, and other wagons, drays, or vehicles.

Our invention is illustrated in the accompanying drawings, in which.

Figure 1 represents a plan View of the rear running-gear of a wagon having our automatic brake with its mechanism applied thereto. Fig. 2 represents the same in elevation, the wheel and brake-shoe being indicated by broken lines.

A A indicate the two rear wheels of a wagon, and B the axle. To this axleis bolted a bracket 1, which supports one end of the shaft 2, to the outer end of which is attached a friction-wheel 3. This friction-wheel is adapted to be throwninto contact with the collar 4: on the hub of one of the wheels (the right-hand one in this instance) and to be rotated thereby. The shaft 2 is loosely journaled in the bracket 1 to allow for a slight movement of the friction-wheel toward and away from the hub. It is also j ournaled just inside of the friction-wheel in the end of a lever 5, which is pivoted to the end of a stud projecting from the bolster C of the wagon. The lever 5 extends upward and forward from the stud 6 to meet the swinging lever or pendulum '7, to which it is coupled by a bolt passing through aslot 8 in the pendulum to allow for the relative movement of the two levers. The pendulum swings from the bracket 9, which extends forward from the upper end of the post D.

Upon the free end of the pendulum is the adjustable weight 10.

Upon the shaft 2 is adrum l1, to which is attached a chain or wire rope 12, which is wound upon the drum when the friction-wheel is driven around by the wheel-hub as it revolves. This drum, however, may be omitted and the rope wound directly upon the shaft. The rope 12 passes from the drum around a guide pulley or roller 13 fastened to the axle B, and thence to the long arm of a lever 14, which is pivoted at 15 upon a saddle-board l6 fastened to the top of the reach and hounds E E The short arm of the lever ll is coupled at 17 to the long arms of the two brake-levers l8 and 10, which are pivoted to the saddle-board at 20 and 21, and are provided at their outer ends with the brake-shoes 22 and A spring 2i is attached to the reach at and to the short arm of lever 14, as indicated, and holds the brake-levers in normal position when the brake is not in operation.

To the end of the pendulum 7 we may, if desirable, attach a rod -26,whieh connects with any of the usual forms of hand or foot levers at the drivers seat. A slot 27 in the end of this rod allows the brake to act independently of the driver.

The operation of our brake is as follows: \Vhen the wagon starts down an incline the pendulum actuated by its weight swings for ward and acts upon the lever 5 to force the friction-wheel against the hub. The revolvin g hub imparts motion to the friction-wheel, thus driving shaft 2 and causing the rope or chain 12 to be wound upon the drum 11 and pulling the long arm of lever l-l backward, which in turn forces the long arms of levers 1S and 19 forward and sets the brake-shoes against the wheels. When the wagon again reaches the level the pendulum returns to a vertical position the frictionavheel is thrown away from the hub, and the spring ill draws the levers to their normal position and releases the wheels.

It will be noticed that by passing the rope 12 around the guidepulley 13 there is a pull upon the shaft 2 toward the axle, due to the tension in the rope as it is wound upon the drum. This pull works in conjunction with the pendulum to press the friction-wheel against the hub.

The weight 10 is adjustable up and down the pendulum in order that it may be set to adapt the brake to light or heavy loads-that is, for a heavy load. the weight would be set down toward the end of the pendulum, thus increasing its leverage and the force with which it presses the friction-wheel against the hub. For light loads the weight would be set up toward the top of the pendulum.

By arranging the leverages as shown it will be seen that a very little power exerted upon the friction-wheel will SlllllGG to set the brake-shoes against the wheels with a strong pressure.

lVe do not confine ourselves to the precise construction shown by way of illustration, as it is evident that this construction is not adaptable to all classes of wagons, and that changes such as would be necessary in applying our brake to different wagons might still be made without departing from the spirit of our invention.

We are aware that prior to our invention a wagon brake has been constructed to operate automatically by means of a weighted pendulum, also that it is not new to use a friction-wheel to operate brake mechanisms. \Ve do not, therefore, claim either of these broadly.

lVhat we do claim as our invention, and desire to secure by Letters Patent, is

1. In an automatic wagon-brake, the combination of a weighted pendulum, a friction wheel adapted to be forced thereby against a wagon-wheel, a shaft driven by the frictionwheel, a rope or chain attached to said shaft and to the brake-levers, whereby the brake is set when the rope or chain is wound upon the shaft.

2. In an automatic wagon-brake, the combination of a weighted pendulum, a frictionwheel, a lever connecting the pendulum with the shaft of the friction-Wheel, and brake mechanism operated by said shaft, when the friction-Wheel is rotated by contact with a rotating wagon-wheel.

In a wagon-brake, the combination of a friction-wheel, a lever for forcing the friction,-

wheel against a Wagon-wheel, a shaft driven by said friction-wheel, a rope or chain attached to said shaft, said rope or chain being carried around a guide-roller attached to the wagon-wheel axle and thence to the brakelevers substantially as and for the purpose set forth.

4:. In an automatic wagon-brake, the combination of a pendulum, a weight adjustable up and down the pendulum, a friction-wheel thrown into contact with a wagon-wheel by the action of said pendulum, and brake mechanism operated by said friction-wheel, substantially as and for the purpose set forth.

5. In a wagon-brake the combination of a saddle-board fastened to the wagon-gear, two brake-levers pivoted to the saddle-board and having brake-shoes fastened upon their short arms, a third lever pivoted to the saddle-board and having its short arm coupled to the long arms of the brake-levers, a spring to retain the levers in normal position, and mechanism substantially as described for exerting a pull upon the long arm of the third lever.

(i. In an automatic wagoirbi'ake, the combination of a weighted pendulum, a support from the wagon to which the pendulum is pi voted, a lever pivoted to a second support from the wagon, one end of said lever being coupled by a sliding joint to the pendulum and the other end of said lever carrying one end of a shaft to which a friction-wheel is attached, a bracket from the wagon axle in which the other end of said shaft is journaled so as to allow for some lateral movement of the shaft, and a rope or chain attached to said shaft and to the brake-levers, whereby the brakes are set when the friction-whcel is forced against a wheehhub by the action of the pendulum.

In testimony whereof we have afiixed our signatures in presence of two witnesses.

CIIAS. P. IIARTMAN. JAMES II. STROUSE. Witnesses:

IIOLLIs H. MILLs, EUGENE DIVEN.

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