US727108A - Car-brake. - Google Patents

Description

No. 727,108. PATENTED MAY 5, 190s. M. J. BONER.

GAR BRAKE.

APPLIGATION FILED JULY 17, 1902.

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' PATBNTED MAY 5', 1903.

v No. 727,108.

M. J. BONER. GAR BRAKE. y APPLICATION FILED JULY 1'7l 1902.

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UNITED STATES Patented May 5, 190e.

PATENT Ormea.

MARTIN J. DONER, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-THIRD TO MOSES H. ALEXANDER, OF ST. LOUIS, MISSOURI.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 727,108, dated May 5, 1903.

Application filed July 17, 1902. Serial No. 11)5,911. (N0 mdel.)

To @ZZ whom it may concern.-

Beit known that I, MARTIN J. DONER, a citizen of the United States, residingin St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Oarllrakes, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specication.

My invention relates to that class of carbrakes wherein frictional shoes are utilized' for braking action, the construction, briefly stated, consisting of brake-Wheels carried byV the car-axles, sectional brake-shoes adapted to be brought into f rictional contact with the brake-wheels, and novel mechanical means by which said shoes are moved to 'and from said brake-Wheels.

The invention consists in features of novelty hereinafter fully described and claimed.

Figure I is a View, partly in elevation and partly in longitudinal section, of my brake lapplied to a car. Fig. II is a View, partly in plan and partly in horizontal section, of the brake. Fig. III is an enlarged perspective view of one set of the brake-shoe sections. Fig. IV is an enlarged perspective view of the rack-gearing throughthe medium of which the brake shoe sections are manipulated. FigV is a View, partly in elevation and partly in section, ofv a modified brake-shoe section. Fig. VI is a' perspective view of a portion of the brake-rod and the parts through which it is actuated.

1 designates the platform of a car; 2, the car-body bolster; 3, the truck-bolster, 'and 4 the cross-bar situated beneath thetruck-bolster. y

5 designates the car-wheels, and 6. their axles. Y

7 designates brake-wheels rigidly mounted on the axles 6 and adapted to revolve therewith. i V

8 designates brake-shoe sections pivotally united in series by hinge-pins 9, said sections being arranged `around the periphery of the brake-wheels 7, so as to partially encircle said wheels. One of the end brake-shoesections ot' each brake appliance is held by a turnbuckle-link 10, which is pivoted to said -to the far side ot the' rock-shaft.

section and is also pivotally joined to the truck-bolster 3 through the medium of a bracket 11. Y

12 designates rocking levers provided with fork-arms 13, that straddle the brake-Wheels 7 and are loosely mounted upon the axles 6.

14 designates connecting-rods containing turnbuckles, one end of each ot which is connected to the end of the brake-shoe section 8, two of the connecting-rods on each side of the brake-wheel being joined to the terminals of the end sections, and the remainder -of Athe connecting-rods being joined to the "sectionsat the hinge connections between them. The inner ends of the connecting-rods are pivoted to the fork-arms 13 at intervals and so disposed as to position the rods obliquely with reference to the brake-shoe sections.

15 designates rack-bars that are pivotally connected to the rocking levers 12 at 16. The upper ends of the rack-bars extend through openings formed in the truck-bolster 3, in which their movement is guided.

17 designates 4 standards mounted on the cross-bar 4 beneath the truck-bolster, and loosely positioned in said standards is a rockshaft 18. On said rock-shaft'is a pair of cogsegments 19, the teeth of which are adapted to mesh with the .teeth of the rack-bars 15. In-Fig. II two frictional appliances are'shown, to be operated by mechanism common to each, and in order thatl the two appliances may be actuated in unison'the rack-bars 15 are situated bothon the same side of the rock-shaft y 18, and vone of the rocking levers 12 is made longerthan the other,"so that it will extend y Fixed to the rock-shaft 18 is a two-armed lever 20.

21 is a link pivoted at one end of the upper arm ofthe lever 20, and 22 is a link pivoted at one end of the lowerarm of saidlever.

23 is a bracket-arm attached to the truckbolster 3. Y

24 is a double-armed lever havinga'foirk 25 at its upper end, and 26 is a second doublearmed lever having a fork 27 at its upper end. The link 21 is connected to the lower arm of the lever 24, and the link 22 is connected to the lower arm of the lever 26.

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28 designates a brake-rod that extends from end to end of the car to connect with one or more of my brakes and to be operated from either end of the car. On the brake-rod are collars 29 and 30, the former of which is adapted to bear against the'fork of the lever 24.-, in which the brake-rod lies, and the latter of which is adapted to bear against the fork 27 of the lever 26, also occupied by the brake-rod.

3l designates a hand -lever swingingly mounted upon the car-platform and to which the brake-rod 28 is connected, there being one of said levers provided at each end of the car. 'lhe hand-lever is furnished with the latch 32, that is adapted to engage a ratchet 33, the actuation of the latch being provided for by a pull-rod 34 and lever 35.

In Fig. V, I have shown a modification of the brake-shoe sections, wherein the section 8a is recessed, and a supplementary block 8b is placed in said recess and backed by a setscrew 8c. By this construction the brakeshoe sections are relieved from wear, which is borne entirely by the supplementary blocks.

In the practical use of this brake the action of the parts is as follows: On a pull being exerted upon the hand-lever 31 in The direction indicated by the arrow in Fig. I the brakerod 28 is moved toward the left, causing the collar 29 on said rod to press against the levezI 24. As a consequence a rearward pull is exerted upon the link 21, connected with said lever, and the rock-shaft 18 is moved to rock in the cog-segments upwardly. This upward movement of the segments elevates the rackbars and raises the rocking levers 12, the forkarms of which rock on the axles 6. On the rocking of said levers the connecting-rods 14- are carried therewith and the shoe-sections8 are pulled inwardly, causing them to bear against the peripheries of the brake-Wheels 7 with frictional contact sufcient to afford any desired degree of braking action, according to the pull exerted upon the brake-rod 28.

The turnbuckles located in the connecting- rods 10 and 14 are placed therein to provide for the adjustment of the shoe-sections 8 With relation to the periphery of the brakewheels 7 to regulate the amount of movement necessary to carry the shoe-sections to the brake-wheels. All of the turnbuckles may be manipulated to obtain this adjustment; but I prefer to obtain it through the medium of the turnbuckle in the rod 10, inasmuch as by so doing it is ,only necessary to manipulate a single buckle.

I claim as my inventionv 1. In a car-brake, the combination with a car-axle, of a brake-wheel xed to said axle, a series of shoe-sections movably positioned at the periphery of said Wheel, a rocking lever loosely mounted on said axle, means whereby said shoe-sections are connected to said rocking lever, and means for rocking said lever to move said shoes to said brakewheel, substantially as described.

2. In a car-brake, the combination with an axle, of a brake-wheel fixed to said axle, shoesections movahly positioned at the periphery of said brake-wheel, a rocking lever loosely mounted on said axle, means for connecting said shoe-sections to said rocking lever, turnbuckle-rods adapted to hold said shoe-sections, and means for rocking said lever, substantially as described.

3. In a car-brake, the combination with an axle, of a brake-wheel fixed to said axle, a series of shoe-sections hinged to each other and arranged about the periphery of said brake-wheel, a rocking lever loosely mounted on said axle, means whereby said shoe-sections are connected at their ends to said rocking lever, and means for rocking'said lever.

4. In a car-brake, the combination with an axle, of a brake-wheel lixed to said axle, a rocking lever loosely mounted on said axle, a series of shoe-sections movably positioned around said brake-wheel, means whereby said sections are connected with said rocking lever, and means for holding said shoe-sections from rotation.

5. In a car-brake, the combination with an axle, of a brake-wheel fixed to said axle, a rocking lever loosely mounted on said axle, a series of shoe-sections movably positioned around the periphery of said brake-Wheel, means for connecting said shoe-sections to said rocking lever, a rack-bar connected to said rocking lever, a rock-shaft, a cog-segment on said rock-shaft arranged in engagement with said rack-bar, and means for rocking said shaft to operate said rack-bar and rocking lever.

MARTIN J. DoNER.

In presence of- E. S. KNIGHT, M. P. SMITH.

IOC

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