US735246A - Car-brake. - Google Patents

Description

PATENTED AUG. 4, 1903-.

I s. H. GRADEN.

GAR BRAKE.

APBLIOATION FILED DBO. 19. 1902.

N0 MODEL.

JNVENTUH ATTOR/V WITNESSES:

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UNITED STATES? PATENT ()FFICE.

SAMUEL H. GRADEN, OF PARKVILLE, MISSOURI.

CAR-BRAKE.

SPECIFICATION forming part of LettersPatent No. 735,246, dated August 4, 1903. Application filed December 19. 1902. Serial No.135,868. (No model.)

To all whont it may concern:

Be it known that I, SAMUEL H. GRADEN, a

citizen of the United States of America, residtrack-rail under the combined weight of the wheel and car; second, to apply the emergency-brake in either a forward or reverse movement of the car;

The invention consists in the novel construction and combination of parts, such as will be first fully described, and specifically pointed out in the drawings.

Figure 1 is a view in perspective of a railway-truck, showing the track-rails and the improved brake. Fig. 2 is a detail side view of one of the car-wheels upon the track-rail and of the novel brake in its normalposition when acting to brake the wheels, and also showing the brake-shoe in a position in dotted lines for blocking the wheel and gripping the track-rail. Fig. 3 is a detail rear end view of the brake-shoe and the rail-gripping device. Fig. 4 is a vertical sectional view of the brakeshoe. Fig. 5 is a view of the under side of the brake-shoe, showing the serrations or teeth in the removable rail-gripping plate. Fig.6 is a detail vertical sectional view taken at right angles to and upon the line was of Fig. 2.

. Similar numerals of reference indicate corresponding parts in all the figures of the drawings. 1

Referring to the drawings, represents the horizontal frame of an ordinary railway-car truck, which sustains pivotally one end of the car. i

12 12 represent the rear car-wheels in the truck, whichare flanged, as usual, to which 'the novel brake, for convenient illustration,

is applied. 1

1 1 14 are the car-axles connecting the forward and rear pair of car-wheels.

Patented August 4, 1903.

' 15 15 are the journal-boxes for the axles adjacent to the outer sides of the wheels, and l 16 16 are the connecting frames or beams connecting one journal-box with another upon the same side of the truck. 18 is the transverse swing-beam, supported at each end by the beams 16 16.

19 19 are the brackets, near the ends of the swing-beam 18, supporting the longitudinal beams 20 20 of the truck-frame 10, which beams are in position directly above the carwheels 12 12. 21 is the pivot-beam extending from one of the longitudinal beams 20 to the other and located directly above the swingbeam 18, and upon which beam 21 one end of the car is supported.

22 represents a portion of the platform of a 1 car, supporting the brake-spindles hereinafter described. 1

17 17 are the track-rails.

Upon the under side of the longitudinal beam 20 of the truck-frame 10 and directly above the peripheral surface of the car-wheel 12 is a stationary sleeve or hanger 23, the under side of which sleeve is curved in the arc of a circle concentric with the periphery of the car-wheel and arranged the proper distance in height above the periphery of said wheel to be clear of the wheel or of any adhering sub stance which would pass the sleeve in the circle of rotation of the wheel. The sleeve 23 is supported in position by the flanges 24: 24, which extend upwardly upon the outer and inner edges of the beam 20 and aesecured rigidly to said beam by the bolts 25. Upon the inner curved surface of the sleeve 23, which is preferably smooth, is a movable yoke 26, which yoke or bar is also curved in the same degree as the inner surfaces of the sleeve 23, the ends of the bar which extend a short distance from the ends of the sleeve being forked, and in said forked ends are fitted the tongue 27 upon the upper ends of the inwardly-curved plates 28 28, which plates extend downwardly both in advance of and in rear of the car-wheel. The tongues 27 are pivotally connected with the bar 26, so as to form ahinge-joint and permit of the movement of the plates outwardly.

3O 30 are the brake blocks or shoes with the upper rear ends of which shoes are connected the lower ends of the plates 28 28, the under side of which shoes normally are in position a short distance above the upper surface of the track-rails 17 17. The brake'shoes are nearly of the width of the peripheral surface of the car-wheel and are triangular in form, the base being directed toward the rail. The inner side of the shoe is curved inwardly to correspond with the curved surface of the periphery of the wheels. On the inner side of the brake-shoes are downwardly-extended flanges 31. v In the under surface of each one of the shoes 30 is a longitudinal groove 32, the sides of which groove are inclined upwardly and outwardly, so as to form a dovetail groove, the width of I the groove at the rear end of the shoe being I a crank-arm 37 on the lower end of a spindle' slightly wider than at the forward end. In the groove 32 is fitted a flat plate or bar 33, the under surface of which is serrated or formed with teeth the edges of which are sharpened and case-hardened, so as to grip the surface of the track-rail.

Upon the upper surface of each of the yokes 26 26 are the lugs 34, with which are pivotally connected the yoke-operating rods 35 35. The forward ends of the rods 35 35 are bent in a curved line inwardly and beneath the transverse beam 21 and are welded together, from which a single rod 36 extends toward the forward end of the truck and beneath the portion of the platform 22 of the car, as seen in Fig. l, and connected with the outer end of 38, which spindle extends upwardly through the platform, and upon the upper end of the spindle is hand-wheel 39.

The brake-shoes 30 30 in rear of the rear wheels 12 12 and opposite each other are connected together by the connecting-rod 40. With the rod 40 is connected the rear end of a brake-rod 41, the forward end of which rod extends to a position beneath the platform of the car, or, as shown in the drawings, beneath the portion 22 of said platform, and with said end is connected a chain 42, the free end of which chain is connected with an enlargement 43 on the lower end of a brakeoperating spindle 44, the upper end of which spindle extends through the portion 22 of the platform, and upon the upper end of said spindle is a hand-wheel 45. Upon the brakeoperating spindle 38 is a disk 46, which is notched in its periphery, and upon the portion 22 of the platform is a lever 47, which is pivoted between its ends to the lugs 48 upon the upper surface of the said portion 22 of the platform of the car, one end of the lever engaging the notch in the disk 46 and being thrown out of the notch by the depression of the outer end of the lever.

The curved shoe-supporting plates 28 are connected with the brake-shoes by an eyebolt 49, and with the eyebolt is connected one end of a chain 50, the other end of the chain extending loosely upward and is connected with the under side of the longitudinal beams 20 20 of the truck-frame 10.

In the operation of the invention and for the purpose of checking the movement of the car-wheels the brake-shoes are employed normally as an ordinary brake, the position of which adjacent to the same car-Wheels and above the surface of the track-rail being equal in distance, the brake-shoes being operated by the brake-rod 44, which winds the chain 42 around the enlargement upon the lower end of the brake-operatingrod. WVhen from loss of control of the car an emergency occurs for the sudden stopping of the movement of the car-wheels by the operator and the ordinary application of the brake-shoes is inefficient to arrest the movement of the wheels, the lever 47 is thrown out of the notch in the disk 46 by the foot and the brake-operating rod 36 moved forward to arrest the forward momenturn of the car-wheels and also moving the yokes 26 26 in the sleeves 23 23 a sufficient distance until the under serrated surface of the shoes come into contact with the upper surface of the track-rails 17 17, and at the same moment the car-wheels under the momentum of the car contact with the brakeshoes and crowding and riding upon the curved inner surface of the shoes the weight of the car and wheels forces the serrated surfaces of the plates 32 forcibly into contact with the track-rails and causes a resistance to any forward movement of the brake-shoes. The arrest of the car-wheels is therefore evident and the action of the brake-shoes suffi cient to hold the car until disengaged, the disengagement being made by moving the cartruck rearwardly a slight distance to release the shoes, and upon operating the brake-rod 36 the brake-shoes are brought into a horizontal position with each other and the brakeshoes operated to brake the wheels, as first described. When the brake-shoes are thrust upon the track-rail and the movement of the 7 wheels arrested, the chains 50 are nearly taut and serves to resist the strain thrown on the brake-shoes by the car-wheels.

The improved brake is applicable to all the car-wheels of a truck andthe chains employed, as in the instance referred to. In car-trucks employing car-springs in which the vibration is considerable the truck-frame is built the proper height, so the sleeves 23 are always out of contact with the wheels in the vertical movement of the truck-frame. The serrated bar 33 is adapted to be removed easily and replaced by another bar. AS the emergency which would require the sudden arrest of the car would be likely to be infrequent, the expense is nominal for the removal. the brake-shoes to guide the brake-blocks into position in contacting with track-rails are firmer when connected by a brake-rod 40 to resist lateral displacement. The invention is applicable to other than railway-cars and may be applied to any vehicle on which the same may be conveniently attached and is an'efficient device for instant application when other means for arresting the movement of a car or vehicle have failed. 7

It is obvious that the brake-shoes may b IIO lowered in position.

Having fully described my invention, what I now claim as new, and desire to secure by Letters Patent, is

1. In a wheel-brake, separate forward and rear brake-blocks, adjacent to the periphery of the wheel, a sleeve supported above the wheel, a yoke movable within the sleeve, and suspensory devices yieldingly connected with the yoke, and also connected with the brakeblocks.

2. In a wheel-brake, separate forward and rear brake-blocks adjacent to the periphery of the wheel, a sleeve supported above the wheel, a yoke movable within the sleeve,

hinged supporting -plates for the brakeblocks, connected with the yoke, and a yokeoperating rod yieldingly connected with the yoke.

3. In a vehicle, the combination with the body of the vehicle, of a sleeve having an upwardly-curved lower, inner side portion, a curved plate or yoke within the sleeve, means for connecting the sleeve with the body of the vehicle,outwardly-curved suspensory plates, hinged to the ends of the plate, within said sleeve, and brake-blocks connected with the lower ends of the suspensory plates, lugs upon the plate within said sleeve a brake-rod pivotally connected with said lugs, and a separate brake-rod connected with the brake-shoe.

4. The combination with a railway car truck, and the track-rails, of a forward and rear wheel brake-shoes normally suspended above the track-rails adjacent to the periphery of the car-wheels, and provided with flanges in the lower, inner side of the shaft, rods conn ectingthe brake-shoes above the separate rails, a sleeve on the under side of the truck-frame above the car-wheels having upwardly curved lower inner side portions, flanges connecting the sleeves with the truckframe, a slidable curved plate or yoke within the sleeve, outwardly -'curved, suspensory plates, hinged to the ends of the curved plate within the said sleeve and connected at their lower ends with the outer end of the brakeshoes, and separate brake shoe -operating rods, one being pivotally connected with the curved plate in the sleeve, and the other with the rod connecting one brake-shoe with the other, and means for securing the brake-rod operating the plate in the sleeve from accidental movement.

SAMUEL H. GRADEN.

. 'Witnesses:

THEODORE O. SPARKS, ANDREW D. GRESHAM.

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