USRE4465E - Improvement in car-brakes - Google Patents

Description

UNITED STATES PA'rEN'I' OFFICE.

WILLIAM H. DUNHAM, OF HOKAH, MINNESOTA, AND JAMES WIDNEY, OF ALLE- GHENY, ASSIGNORS OF PART INTEREST TO SAMUEL P. ROSS, OF PITTSBUBG,

PENNSYLVANIA.

IMPROVEMENT IN CAR-BRAKES.

Speeication forming part of Letters Patent No. 71,591, dated December 3, 1867; reissue No. 4,465, dated July 11, 1871.

DIVISION A.

To all whom it may concern:

Be it known that we, WILLIAM H. DUNHAM and JAMES W IDNEY, the foriner now of Hokah, State of Minnesota, the latter of the city of Alle gheny and State of Pennsylvania, have invented a certain Improvement in Oar-Brakes 5 and having assigned a portion of our interest in the saine to SAMUEL P. ROSS, ofthe city of Pittsburg and State of Pennsylvania aforesaid, the following is a specification:

The invention consists of a new and improved car-brake, arranged by means of levers, pulleys, rods, and chains, so that the brake-beams may be dispensed with and a compound leverage obtained for bringing the brake to bear with force upon the truck-wheels.

The accompanying drawing represents the In achine and its parts. Figure 1 is a longitudinal section of a car-truck provided with our iinproveinent. Fig. 2 is an end view of the saine, and Fig. 3 is a top view of the trucks of a ear with portions of the fraine broken away for the purpose of showing the improvement.

The car-truck and wheels are constructed and arranged in the ordinary In anner. A is the tru ckfranie. B B are the wheels. C C represent iron levers, held in their properpositions by slotted hangers or supports hf, made of wrought or castiron and bolted to the truckfra1ne A.l 5 are bolts passing through the ends of the slotted supports or hangers h and through the levers C C', about three to live inches from their outer ends, where they are attached to the brake-heads. These bolts act as pivots, upon which the levers are allowed to turn freely. On the inner ends of the levers O are pivoted links 7, to which is attached a chain, 6, which passes around a pulley, c, on the end of lever G', and is connected to the pulley 0 on the shaft fi, on the upper end of which is secured a transverse lever, a', to which are attached the connecting-rods 3 and 4, provided with swivel-links 2. To one end of the connecting-rod 4 is secured a chain, l5, which is attached to the ordinary brake-shaft D.

Then it is desired to operate the brake the hand-shaft is turned and the chain 15 wound up, which will, by nieans of the transverse levers .'20, draw forward the rod l and force back the rod 3 and cause the pulley o to wind up the ch ain 6, thus drawing the ends of the levers C O toward each other and forcing the brake-shoes against the wheels B. The levers, after being thus operated, are held stationary hy the usual appliance of a pawl and ratchetwheel, indicated at w. Then the pawl. is tripped the springs 12 cause the levers O O to assume their original position and thereby relieve the brakes from the wheels.

Ve claim- The levers C C', pivoted to the hangers or slotted supports L, and made inoperative by the springs l2, the whole constructed., arranged, and operated as described.

JAMES VIDNEY. S. P. ROSS. 1V. H. DUN HAM.

Witnesses:

WILLIAM F. ltoBB, GEORGE OGDEN, .JAMES E. ANDERSON, L. S. KEELER. f

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