US517212A - Island - Google Patents

Description

(No Model.)

L. H. COLE. GAR BRAKE.

No. 517,212. Patented Mar. 27, 1894.

WINS/E5555.

ms NATIONAL umomurnma OOMPfiNV.

WASMINGTGN. n. c.

NITED STATES PATENT OFFICE.

LLOYD H. COLE, OF PAWTUOKET, RHODE ISLAND.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 517,212, dated March 27, 1894. Applloationfiled August 24,1893. Serial No. 483.380. (No model.)

To aZZ whom it may concern:

Be it known that I, LLOYD H. COLE, of the city of Pawtucket, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Brakes; and I hereby declare that the following is a full, clear, and exact descrip tion of the same, reference being had to the accompanying drawings, forming part of this specification.

This invention relates to improvements in car-brakes.

The object of the invention is to so construct a car-brake that but a small pressure on the brake-handle will be necessary to apply the same.

Another object of the invention is to provlde mechanism by which the brakes may be held in contact with the car-wheels without exertlng a continuous pressure on the brakehandle.

Still another object is to so construct and arrange a positive car-brake that it may be operated by intermittent pressure.

Another object is to provide a simple device for releasing the brake.

The invention consists in the combination with a positively-applied brake of an intermittent operating mechanism.

The invention also consists in the peculiar construction and arrangement of the operating mechanism.

The invention further consists in the peculiar device for holding the brakes in position against the wheels.

Still further the invention consists in the brake-releasin g mechanism.

The invention also consists in the manner in which the brakes are supported and connected, and also in such other novel features of construction and combination of parts as will hereinafter be more fully described and pointed out in the claims.

Figure 1 represents a top view of a cartruck showing a plan View of the improved brake-apparatus. Fig. 2 represents a side elevation of the same. Fig. 8 represents a cross-sectional view of the cam-wedge and its arm, taken on a line a-b Fig. 5. Fig. 1 shows a detail view of the device for retarding the action of the brake-handle. Fig. 5

represents a detail view of the cam-wedge and its arm mounted on the brake-shaft.

Similar numbers of reference designate corresponding parts throughout.

In'the drawings 6-6 are the side beams of a car-truck, or of the car-body, the flooring between which is removed to show the construction and arrangement of the brake.

7-7 and 8-8 are the ordinary car-wheels mounted on the shafts 9 and 10.

The brackets 11 and 12 are secured to the side-beams 6-6 and pivoted to these brackets are the arms 13 and 14 in bearings in the lower ends of which the brake- shafts 15 and 16 are journaled, the ends of these shafts are connected by the adjustable side-rods 17-17.

Depending from and rigidly secured to the brake- shafts 15 and 16, opposite the faces of the wheels, are the brake-arms 18-18 on which are mounted the brake-shoes 19-19 the concave surfaces of which may be brought to bear on the periphery of the wheels when the shafts 14 and 15 are rotated in a direction away from the wheels, also that when one of the shafts 15 or 16 is forced away from the corresponding pair of wheels the brakeshoes 19 of the other shaft will be the more firmly brought into contact with the wheels to which they appertain. The shafts 15 and 16 are furnished with longitudinal keys 20, and mounted on theseshafts are the arms 21-21 the bearings in which have segmental extension-slots 22-22 to receive the keys 20, the arms 21 being thus free to reciprocate along the shafts and to a slight extent determined by the segmental slots and the keys are free to rotate thereon,-the bases of the arms have the ears 23-23, and to the upper ends are fastened the blocks 24-24 having a wedge-shape cross-section and a concave outer surface, as more clearly indicated in Figs. 3 and 5. On the shafts 15 and 16 are also rigidly secured the brake-levers 25 and 26 having the ears 27-27 at their lower portions,-to the upper ends of these lovers are pivoted the adjustable rods 28-28 which are pivoted at their inner ends to the opposite ends of the cross-arm 29 supported on a central pivot, thus the throwing back of the lever 25 will operate, through the rods 28-28 and the cross-arm 29, to throw back the lever 26 to partially rotate the shaft 16 and to posi tively apply the brakes to the wheels 8-8, the throwing back of the lever tending to similarly operate the brakes of the wheels Rigidly mounted on the wheel-shafts and rotatable therewith arecams, as --30, these are located opposite the brake-levers 25 and 26 in such position that the blocks 24 carried on the arms 21 may be interposed between the cams and the levers by moving the arms 21 along the shafts 15 or 16,this movement is accomplished by means of a" system of le- Vers connecting with a brake handle.

In the drawings the lever 31 is pivoted to the ears 23 of the arm 21 and to one arm of thebell-crank 32 pivoted to thebracket 33, the other arm of this bell-crank is in turn pivoted to one end of the rod 34,the other end of the rod being in like manner secured to the arm 35 carried at the lower end of the verticalbrakeshaft 36 provided at its upper end with the usual wheel or handle. On this shaft 36 is also mounted a stop-arm 37,-when the shaft is rotated sufficiently to move the arm 2lto a position where the cam beginsto act on the wedge-block, this stop -arm is brought against a spring-buffer 38, suitably supported, and thus any further movement of the brake-handle must'be made against the pressure of the spring, by this means the sudden interpositionof the wedge-block between the cam and the brake-lever will be prevented. As the wedge-blocks are interposed between the cams 30 and the brake-1evers 25 or 26,the pressure of the cams on the blocks throws these and the brake-levers backward, rotating the brake-shafts and bringing the brake-shoes 19 in contact with the whee1s,--it is obvious that as the wedgeblocks are advanced farther between the cams and the brake-levers the brake-shoes are forced into more intimate contact withthe wheels-until the shoes bear againstthewheels sufficiently to stop therotation of the same.

If no provisionwas made to holdthe-brakeshoes in place against the wheels when once the pistonhead is the disk 46 which, when pressedagainst the piston-head by the coiledspringwt? closes the perforations 43 therein and preventsthe fluichwith which the cylinder is filled, from passing throughthese from the forward end of the cylinder to the rear portion thereof. The pistonrod extends through the stuffing-box 48 and is connected by the pivoted-link 49 with the lever 50, the opposite end of this lever being plvotally supported by the arm 51 which extends from the cylinder, while to the center of the lever is pivoted the bent-arm 52 connecting with the brake-lever 25 or 26 to the ears 27 of which it is pivoted; it will, therefore, be seen that as the piston-head is pushed back by thethrowing back of the brake-lever, the fluid contained within the cylinder will pass through the perforations of the piston-head, forcing the disk 46 back against the action of the spring, when this backward movement ceases the spring will press the disk 46 back into place and the piston-head will be held in place, the brakes thus being held in contact with the wheels through the connectionswith the pistonrod.

W'hen it is desired to release the brakes the valve 41 is operated by the connecting-rod53,

the handle 54 and their connections, to turn thevalve and open the passage 40 through which the fluid may pass from one end of-the cylinder to the other, allowing the pistonhead 42 to be drawn toward the forward end of the cylinder by the overbalancing of the brake-shoes, or by springs when necessary.

Having thus described my lllVQIliilOl], I

claim as new anddesire tosecure by-Letters on said support and adapted to be acted upon by the cam.

2. In a car-brake, in combination, carwheelsa suspended rotatable shaft, brakeshoes carried by the shaft, and a device for holding the shaft against backward rotation when the shoes are applied tothe wheels 3. In a car-brake,the combination withcar wheels, the axle on which the wheels are mounted,and a cam operatedby the rotation of the wheels, of ashaft" rotatable-in bearings, brake-shoes carried by the shaft and adaptecl to be applied to the wheelsby thelrotation of the shaft, and a device carried by the-shaft and adapted to be acted upon by the cam 4. Ina carbrake, the combination wit-b carwheels, brakes mounted on a rotatableshaft, and a device for intermit-tingly moving; the brakes toward the wheels,-of automatic means for holding the brakes in position, as described.

5. Irtacar'brake thecombinationwith-the wheels-the shaft or axle on which thewheels are mounted, and a-cam also mountedon the wheel-shaft, of a shaft mounted in bearings, brakes carried by the shaft,-anarm, keyed to the shaft against independent rotation, adapted to be reciprocatedalong said shaft-and to" a brake-shaft, and an arm rigidly secured thereto, of a piston-rod connected with said arm by pivoted levers, a cylinder, having a passage connecting its end portions and a valve for closing the passage, in which the piston-rod moves, a perforated head mounted on the piston-rod within the cylinder, and an automatic-valve for closing the perforations in the head.

7. In a car-brake, the combination with carwheels mounted in pairs on shafts, of arms pivotally secured to aframe, shafts rotatably secured in bearings in said arms, brakes carried by the shafts, side rods connecting the arms, and means for rotating either or both of the brake-shafts, as described.

8. In a car-brake, the combination with the sideframes 6-6, the Wheels '77 and 88 mounted on the shafts 9 and 10, and the cams 30-30 also mounted on said shafts, of the depending-arms 1'3 and 14 pivoted to brackets depending from the frames, the shafts l5 and 16 'journaled in bearings at the lower portions of these arms, the brake-arms 18 rigidly secured to the shafts opposite the wheels, the brake-shoes 19 19 secured to the brake-arms, the brake-levers and 26 rigidly mounted on thebrake-shafts,the arms 2l-2l furnished with the wedge-blocks 2424 reciprocally mounted on the brake-shafts, and means for 30 reciprocating these arms 21, as described.

9. In a car-brake, the combination with the shafts 15 and 16 rotatably mounted, and brakes carried thereby and adapted to heapplied by the rotation of the shafts, the cylinder 39 having the passage 40, the valve 41 for closing the passage, the rod 53 for operating the valve, the piston-rod 44: working through a stuffing-box in the end of the cylinder, the perforated-head 42 on the inner end of the piston-rod, the disk 46 movable on the piston-rod, the collar 45 and spring 47 for pressing the disk against the head 42, the cross-lever 50 pivotally connected with the outer end of the piston and with the support 51, the rod 52 pivoted at one end to the lever 50, and the arm 25 rigidly mounted on the brake-shaft 15 to which the other end of the rod 52 is pivoted, as described.

In witness whereof I have hereunto set my hand.

LLOYD H. COLE.

Witnesses:

JOSEPH A. MILLER, .112, M. L. MAHONEY.

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