US867376A - Car-brake. - Google Patents

Description

= No. :867,376'. PATENTBDOGTY. 1, 19o7. E. E.' JBTT @n c. S.,PALMBR.

' GAR BRAKE.

APPLIoATI'oN mm1)v Mula, 1991. v

. A PATENTED0GT-1', 1907. E. E. JB'TT & c. s. ,PALMEl CAR BRAKE APPLIcATroN FILED MAY 1a, 1907.

'2 SHEETS-SHEET 2.

EMERY E. JETT AND CLINTON PALMER, OF CHICAGO, ILLINOIS.

CAR-B RAKE Specicaton of Letters Patent.

Patented Oct. 1, 1907.

Application filed May 13,1907. Serial No. 373,273.

To all whom it may concern:

Be it known that we, EMERY E. .In'r'r and CLINTON S. PALMER, citizens of the United States of America, residing at Chicago, in the county ol' Cook and State of Illinois, have invented certain new and useful Iniprovements in Car-Brakes, of which the following is such a full, clear, and exact description as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in car brakes and has for its object the production of a brake which will be simple in construction, efficient in operation, of light weight and easy of manipulation. Such a brake is shown in the accompanying drawings, and the invention consists in certain novel features hereinafter first fully described and then particularly pointed out in the claims.

In the said drawings, Figure 1 is a side View of a car truck equipped with our improved brake. Fig. 2 is a plan view of the same with parts omitted showing the brakes released; Fig. 3 is a detail view of one of the joints; Fig. 4 is a plan View showing the brake applied, and Figs. 5 and G are plainviews showing modifications.

The truck may be of any preferred type and is shown as comprising a spring plank, l, and a bolster, 2, with the usual connections.

Our improved brake mechanism is carried by the spring plank and may be mounted upon either the upper or lower side of the same. The brake shoes, 3, are supported by hangers, 4, of any desirable type, and to the shoes are pivoted levers, 5, which extend inward toward the central longitudinal line el the spring plank where their inner ends are pivoted to the outer ends of bars, 6, one of said bars being arranged near each end of the spring plank. `When the bar G is moved toward the end ol the spring plank, the levers 5 are caused to vibrate and thus move their outer ends outward and carry the brake shoes against the wheels. ln order to limit this movement oi the levers and thereby prevent one of them moving a greater distance than the other, we form shoulders or stops, 7, on the inner ends of the same which are adapted to impin'ge against the edge of the bar and thereby arrest the outward movement of the levers. Movement is imparted to the bars (i by aV system of levers, 8, arranged in pairs and connected to the inner ends of the bars. A pair of levers is pivoted to the inner end of each bar and the inner ends of the pairs are connected by brackets, 9,

which are of a trefoil or three-armed formation. The ends of the levers' are pivoted to the ends of the brackets and one of the brackets has pivotally attached to its outer or central arm the end of the brake rod l0, the other bracket being securely fastened to the spring plank by a bolt inserted through its central or outer arm.

S are connected by a pin and slot connection. directly to the levers 5 connected with the brake shoes ior one pair of wheels. The levers connected with the other brake shoes are connected with the co-acting levers by links, 1I, the ends of which are pivoted to the opposite levers at opposite sides of the pivots of the same. When a pull is exerted on the brake rod, the levers 8 cause the levers 5 to swing toward the wheels and apply the brakes.

In Fig. (i is shown another form of the invention in which a rotary disk, 13, is substituted for the system of levers S and a link, 14, extends from the said disk toward the end oi the spring plank where it is connected with both levers beyond the line of the wheels by a single pin and slot connection. A crank arm, 15, extends frem the disk4 and is pivoted to the end of the brake rod. When a pull is exerted on the brake rod, the crank disk is rotated so as to draw the links 14 inward and thereby bring the levers at the ends of the same into a single line and apply the brake shoes.

In all forms of the device, the brake shoes are applied through a direct push of the levers carrying them and the full strength of the levers is thus utilized. In order to prevent bending of the levers and bars, they are all preferably made of larger diameters at their centers than at their ends. The usual brake beams are dispensed with and the mechanism is freed of all unnecessary elements. The parts are all simple yin construction, the weight of the truck is materially reduced, and the application of the brakes is efficient and readily accomplished.

Having thus described our invention, what we claim and desire 4to secure by Letters-Patent is .lhe combination of brake-shoes, vibratory levers pivoted to the brake shoes, a pair of levers having a xed support, a second pair of levers connected withthe first pair of levers, means for moving the joint of the second pair of levers toward and away from the first pair of levers, and a common connection between both said pairs of levers and the vibratory levers which are pivoted te the brake-shoes.

In testimony whereof, we have signed this specification in the presencefof two subscribing witnesses.

EMERY E. JETT.

,CLINTON S. PALMER.

Witnesses:

EDWIN WIKELAND, TUREH LUNDBnnG,

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