US468254A - Joseph elie normand - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1 J E NORMAND LOGOMOTIVB DRIVER BRAKE.

Patented Feb. 2

(No Model.) 2 Sheets-Sheet 2.

J. E. NORMAND.

LOGOMOTIQVE DRIVER BRAKE.

No. 468,254. Patented Feb. 2, 1892.

UNITED STATES PATENT OFFICE.

JOSEPH ELIE NORMAND, OF VATER'IOVN, ASSIGNOR TO CHARLES GOOINVIN EMERY, OF NEXV YORK, N. Y.

LOCOMOTlVE-DRIVER BRAKE.

SPECIFICATION forming part of Letters Patent No. 468,254, dated February 2, 1892.

Application filed October 21, 1891. Serial No. 409.394. (No model.)

To all whom it may concern:

Beit known that I, J osnrn ELIE NORMAND, a citizen of the United States, residing at Vatertown, in the county of Jefferson and State of New York, have invented new and useful Improvements in Locomotive-Driver Brakes, of which the following is a specification.

This invention relates to that type of locomotive-driver brakes wherein an equalizing- IO lever comprising two crank-arms is connected with pivoted hangers on which the shoe-brakes are mounted, forthe purpose of producing an equalized pressure of all the brake-shoes on theseveral wheels. As heretofore constructed 1 5 the equalizing-lever is pivoted to the brake operating lever and the adjusting devices employed to compensate for wear of the brakeshoes are connected with one of the crankarms of the equalizing-lever. In consequence of this when the adjusting devices are operated the equalizing-lever is moved and its position is varied relatively to the brake-operating-lever which carries such equalizinglever.

The object of my invention is to provide a novel arrangement whereby the equalizinglever is mounted on the hanger which carries a brake-shoe, and the adjusting devices are connected with the center of the equalizing- 0 lever in such manner that the adjusting devices can be operated to compensate for wear of the brake-shoes without in any manner changing the position of the crank-arms of the equalizing-lever from their normal work- 5 ing position.

The invention also has for its object to pro vide a spring-carrying block for the purpose of preserving the face of a gravity brake-shoe concentric with the wheel, which spring-car- 0 rying block is so adjustably arranged on the hanger as to entirely avoid any forward projection of its adjusting set-screw which would interfere with the close arrangement of the truck-wheels relatively to the driver-wheels of the locomotive.

To accomplish these objects, my invention involves the features of construction and the combination or arrangement of devices hereinafter described and claimed, reference being made to the accompanying drawings, in

which- Figure 1 is a side elevation showing sufficient of a car to illustrate my invention. Fig. 2 is a detail perspective view of the equalizing-lever, the hanger to which it is pivoted, and the adjusting devices employed to compensate for wear of the brake-shoes; and Fig. 3 is a detail perspective view, on an enlarged scale, showing the spring-carrying block, the hanger, and the brake-shoe.

In order to enable those skilled in the art to make and use my invention, I will now de scribe the same in detail, referring to the drawings, wherein The numeral 1 indicates the frame-work of a locomotive, 2 the driver-wheels, and 3 the truck or pilot wheels. The frame-work is provided with suitable brackets, to which are pivoted the pendulous hangers l, on which the gravity brake-shoes 5 are mounted. The shoe-backs 6 of the gravity brake-shoes are centrally pivoted to the pendulous hangers intermediate the extremities thereof, and to the lower end portion of the hanger, which is suspended between the driver-wheels 2, is pivoted one crank-arm S of an equalizing-lever 9. The other crank-arm 10 of this equalizinglever is connected by a rod 12 with the lower end of the hanger 4, which is suspended between the front driver-wheel and the pilot or truck wheels.

The two crank-arms of the equalizinglever are preferably arranged to stand in a perpendicular plane, and the center of this lever is connected with one section 13 of a turnbuckle, the other section 1a of which is pivoted to the lower extremity of an oscillatory brake-operating lever 15, which is hungintermediate its extremities, as at 16, to a suitable bracket on the frame-work of the locomotive.

The brake-operating lever 15 may be operated by means of fluid-pressure, as usual in driver-brakes, or it may be operated manually or in any other manner suitable for the conditions required, and therefore I do not deem it essential to illustrate or describe any particular mechanism for moving the brake-operating lever to actuate the brakes.

If the brake-operating lever 15 is moved in one direction, it transmits power through the adjusting device to the equalizinglever, thereby swinging the pendulous hangers and forcing the brake-shoes against the driverwheels with an equalized pressure. WVhen the brake-operating lever is released or moved in the opposite direction, the brake-shoes are released from the wheels.

The adjusting device is preferably composed of a turn-buckle wherein the screw-rod section 13 engages a screw thread on the interior of the tubular section 14, so that by turning the section 14: the turn-buckle. is lengthened or shortened to 'suit'thecondition's"required for the proper action of the brake-shoes. When the brake;shoes become unduly Worn, the adjusting devices can be operated to lengthen the turn-buckle and thereby move the brake-shoes toward the driver-wheels to compensate for Wear. V

In order to maintain the actingfaoes of the gravity brakeshoes concentric with the periphery of the driver-wheels, I provide each pendulous hangera with a spring-carrying block 17, mounted centrallybetweenitseX-j tremities on a stud or shaft 18, projecting-from the hanger, so that the block can have a 11m. ited oscillating movement on the stud or shaft. The block isprovided at one extremitywith a lateral shoulder 19 and at the opposite extremity with a tail-piece 20, through which passes a set-screw 21, which bears at its inner' end portion against the shoe-back inproximity to thepivot 7 thereof. A flat. or leaf 'spring22' is connected at one end to the stud or shaft 18; of the hanger, and between such stud or shaft and the free extremity of the spring the. lat

ter rests against the shoulder19 of the block; 17. The free extremityof the'spring bears against the lower extremity-of the gravity brake-shoe and sustains the latter in the po- 'sition required to maintain the face of the brake-shoe concentric or parallel'with the periphery'of the driver-Wheel. The power or tension of the spring can be regulated by ad-L justing the set-screw 21, and for the purpose of locking the set-screw in the position towhich it is adjusted I provide a lock-nut 23, which engages the set-screw and is adapted to bear against thetail-piece 20 of the block 17.

By pivoting the spring-carrying block 17 on the laterally-projecting stud or shaft 18 of a pendulous hanger 4 and arranging the setsorew to bear against the shoe-back in proximity to the pivot thereof I entirely avoid any undue projection of the set-screw in front of the pendulous hanger. This is important with respect to the hanger which is suspended between .the front driver-wheel and the pilot ortru'ckwheels, as it enables the latter to be closely arranged to the front driver-wheels without liability of striking the adjusting de- ;.vice of the spring-carrying block.

Thedrawingsei'chibit the arrangement at one side only of a locomotive; but in practice the parts are thesame at eachside and the forward hangers are preferably connected by a cross-beam or tie-bar'24.

I have shown and described a turn-buckle as constituting the adjusting devices; but any suitable rod "connection which is lengthwise aadjustable maybe employed to connectthe brake-operatinglever with the equalizinglever= Having thus described myinvention, what Iclaim is- V 1. Ina looomotive-driver-brake', the combination, with a brake-operating lever and pend- ;ulous hangerscarrying pivoted brake-shoes, of an equalizing-lever comprisingftwo crankarrns, one of which isconneotedto a hanger,

a connectionbet'ween'the'other crank-arm and hand and affixed my seal in presence of two subscribing'wi-tnesses.

JOSEPH ELIE N ORMAND. lvitnessesz I GEORGE W..REA, J. A. RUTHERFORD.

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