US549563A - Territory - Google Patents

Description

(No Model.) I 2 Sheets-Sheet 1.

J. O. DUNHAM. AUTOMATIC WAGON BRAKE.

No. 549,563. Patented Nov. 12,1895.

@1557 aivz/ 6 95.

(No Model.) 2 SheetsSheet 2. J. G. DUNHAM. AUTOMATIC WAGON BRAKE.

Patented Nov. 12; 1895.

HOTO-UTNUWASHINGI'OMDC UNITED STATES PATENT OFFICE.

JOSEPH O. DUNHAM, OF NORMAN, OKLAHOMA TERRITORY.

AUTOMATIC VWAGON-BRA'KE.

SPECIFICATION forming part of Letters Patent No. 549,563, dated November 12, 1895. Application filed January 28, 1895. Serial No. 536,470. (No model.)

To aZZ whom it may concern.-

Be it known that I, JOSEPH O. DUNHAM, a citizen of the United States, residing atNorman, in the county of Cleveland, Oklahoma Territory, have invented certain new and useful Improvements in Automatic \Vagon- Brakes; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention is an automatic wagon-brake; and it consists in the novel construction and arrangement of its parts.

In the accompanying drawings, Figure 1 is a top plan view of a wagon with my brake attachments applied thereto. v Fig. 2 is a side elevation of a wagon, showing my means of releasing the brake-shoes from contact with the hind wheels. 7

The object of my invention is to produce an automatic brake that will automatically brake a wagon when going downgrade without the necessity of the team holding back and to brake as it releases its grasp from the wheels when the draft is on and a brake that can be released by the driver from the box.

My invention is described as follows:

A and B, respectively, represent the front and rear parts of the running-gear.

0 represents the brake-bar, and a represents the brake-shoes.

To the rear part of the rear running-gear is secured two springs cl, which may be elliptical or in any other proper shape. To these springs are secured the rear ends of rods 6, the front ends of which are threaded and pass through the bar 0, and on the threaded ends of these rods 6, and working against the front face of the brake-bar are nuts f. These nuts are provided with perforations, and the threaded ends of said rods are also provided with perforations, so that safety-pins f may be passed through said perforations to prevent the nuts from turning. The purpose in having the front ends of said rods e threaded and having working thereon threaded nuts f is to increase or decrease the tension of the springs cl, thus lessening or increasing the friction of the brake-shoes against the periphery of the wheels, so as to accommodate said friction to the sizeof the wagon or the weight of the load.

To the rear hounds are secured V-shaped rods it, their upper ends h secured to the upper face of the hounds and passing pver and in front of the brake-bar 0, their lower ends it passing under said brake-bar and secured to the lower face of the hounds. In the V- point of these bars is a perforation, to which is pivoted the outer ends of levers Q and inside of said pivotal points, about six or eight inches therefrom, are projections t", their rear ends being secured to the brake-bar and their front ends pivoted to said levers 1'. Thus, as will be seen, these V-shaped rods act not only as f ulcrums for the levers i but guides for the brake-bar O. The inner ends of said levers are of considerable length, each passing beyond the opposite side of the coupling-tongue, and to the ends of these levers are secured the rear ends of chains j, their front ends being secured to the hook or ring j in the rod 7o, the front end of said rod being hooked in a link 7s, which passes around the king-bolt of the wagon, and to the front end of said link are secured the rear ends of chains 1,

their front ends being secured to the doubletree m, and on the top of the tongue n is secured a strap 0, having a longitudinal slot 13, the tongue at being provided with a corresponding slot, and through this slot 19, through the central perforation of the doubletree and through the corresponding slot in the tongue, runs the doubletree-pin, thus enabling the doubletree-pin to work backward and forward to the extent of the length of the slot 19.

The operation of my brake is as follows: The Springs (1, through the rods 8 and the brake-bar 0, keep the brake-shoes o tight up In addition to the mechanism above described I have pivoted to the bottom and left side of the wagon-body a lever B, and to the rear edge of said lever are secured the front ends of chains r, while their rear ends are secured to the front ends of the chainsj, and to the right-hand end of said lever is secured a rod S, the front end of which is secured to a usual brake-rod mechanism T, and when the driver wishes to unbrake the wagon to back it, or for any other purpose, he pushes the brake-lever t backward.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

In an automatic wagon brake, consisting of the springs (l, rods (a, brake bar 0, nuts f,

JOSEPH (J. DUNIIAM. \Vitnesses LUCIOUs E. RIsK, BENJAMIM F. WILLIAMs.

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