US664895A - Brake mechanism. - Google Patents

Description

No. 664,895. Patented Jan. 1, ism. H. E. PUTNEY.

BRAKE MECHANISM.

(Application filed Mar. 30, 1900.)

(No Model.)

i i/i 51- TH: 3am: PETERS co, PnOTO-L|THO.,WASNINGYON ac llNlTED STATES PATENT OFFICE.

dilERBERT E. PUTNEY, OF TOLEDO, OHIO, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, OF THREEFIFTHS TO MILTON D. PUTNEY, HENRY W'ILE, AND JESSIE L. WBITNER, OF SAME PLACE.

BRAKE MECHANISM.

SPECIFICATION forming part of Letters Patent No. 664,895, dated January 1, 1901..

Application filed March 30, 1900. Serial No. 10,738. (No model.)

To aZZ whom it may concern: frictional engagement with disks 3 of wheels 50 Be it known that I, HERBERT E. PUTNEY, a 2 and provided with a central orifice 8 of a citizenof theUnited States,residingatToledo, diameter greater than the diameter of the in the county of Lucas and State of Ohio, have hub 4 andadapted to receive the hub cen-' 5 invented a new and useful Improvement in trally without contact therewith. Shoes6 are Brake Mechanism, of which the following is formed of sections 9 and 10, each incut to 5 5 a specification. form one-half of orifice 8 and having com- In the specification of Letters Patent No. plementary overlapping portions 11 and 12, 581,490, dated April 27, 1897, I have described respectively, which are provided with coinan improved brake mechanism applicable to cident orifices, through which are inserted cars wherein brake-shoes are simultaneously bolts 13, by which the sections are firmly 6o moved into and out of frictional contact with secured together around an axle l, with the disks secured to the car-axles by mechanism heads of bolts 13 countersunkin the frictional simultaneously actuating the shoes. Withface 7 of the shoe. The sections are also 15 out departing from the principle of the brake provided with ribs 14 on the opposite side mechanism therein described my invention to increase the rigidity of the shoe and with relates to improvements thereof, and has for oppositely-projecting shanks 15, one or both its objects to simplify the construction and of which are adapted to be bolted to a supapplication of the brake mechanism, increase porting-bar 5 and provided with a boss 16,

20 its effectiveness, and establish it in better according as the shoes are designed to be relation to other parts of the car mechanism, attached to the bars in pairs, as shown in with reference to accessibility to both car and Figs. 1 and 2, or singly, as in Figs. 5 and 6. brake mechanism; furthermore, to provide Centrally through the bosses l6 and the noiseless friction-surfaces for the brake readshanks 15 are orifices 17, which are inwardly 25 ily renewable when worn. it accomplish these threaded with right or left threads of equal objects as illustrated in the accompanying pitch, according to the position of the shoe, drawings and hereinafter described. all of those on the same side of the car being In the drawings, Figure 1 is a diagramrelatively right or left threaded in respect matic plan view of my invention applied to a I to those in the shoes of the opposite side.

0 car-truck. Fig. 2 is a longitudinal section Between the shoes 6 of each axle and conthrough a car-truck, showing a brake bar necting them are shafts 18, in threaded enand shoe in side elevation. Fig. 3 is a transgagement therewith through the orifices l7. verse section of a car-wheel and of a brake- One end of shafts 18 is right and the other shoe as applied thereto. Fig. 4 shows one left threaded to adapt them to such engage- 5 section of a shoe. Fig. 5 is a longitudinal ment. Shafts 18 are provided with suitable section through a car-truck, showing a side pulleys 19, by which all the shafts 18 of each elevation of a shoe and brake-bars as applied car are revolubly connected to each other and to a single axle thereof; and Fig. 6 shows a to the brake-operating mechanism, prefermodified form of brake-shoe. ably by wire-rope belting 20, rived around 40 Referring to the drawings, 1 l are the axles the pulleys; but crank-levers may be substiof a car-truck, having wheels 2 permanently tuted for the pulleys and connecting-rods for 0 secured thereon, each provided with a conthe belting when better serving the purpose centric disk 3 on its inner face and preferofrotating the shafts 18 in unison. The shafts ably cast integral therewith and anelongated 18 are made of such length that when in 45 inwardly-extended hub 4:. threaded engagement at each end with a 5 5 are supporting-bars, resting in position brake-shoe the frictional faces of the shoes of 5 near and parallel to the wheels, across beams each axle may be held at such distance from of the truck-frame, to which are secured the face of their respective Wheel-disks that brake-shoes 6, having one face 7 adapted to one revolution, more or less, of shafts 18 will simultaneously advance them into or retract them from direct contact with the disks of the wheels, according to the direction in which the shafts are rotated, and the several shafts of a car being rotated in unison all the shoes of a car will be advanced or retracted in unison. Shoes 6 thus connected are supported by bars 5, secured thereto as described, resting across the central beams 21 of a car-truck when applied to all of the wheels of a streetcar truck, as in Fig. 1, or on a central and end beam of the truck where applied to the wheels of a single axle, as in Fig. 5, or on the sand-plate or its equivalent of the trucks of railroad-cars, the bars 5 being constructed in such form as may be best adapted for their own support and the support of the shoes in proper position for contact with the wheeldisks. Bars 5 are also provided with any suitable means of preventing their longitudinal or vertical movement without limitation of their lateral movement by shafts 18, such as stops 22, (shown in Figs. 1 and 2,) and to prevent the lateral shifting on the truck of the frame, formed of shoes 6, their connectingshafts 18, and supporting-bars 5, spring-stops 23 of suflicient resistance attached to the supports of the bars, either between or outside the bars, adapted to yield to the retraction or advancement of the bars under the pressure of screw-shafts 18 may be used.

The friction-disks 3 of the car-Wheels are preferably provided with friction-plates 24, of ind urated fiber or other suitable material, secured thereto by bolts 25 through the web of the wheel, with the heads of the bolts countersunk in the friction-plates. Similar plates may also be attached to the bearing-face of the shoes 6 in a similar manner. By the use of the plates 24:, which may be renewed as required, the wearing of the Wheel-disk or of the metal of both the Wheel and the shoes is avoided and the noise arising from frictional contact of metal with metal is prevented.

The elongated hub 40f wheel 2 is designed as a substitute for the collars ordinarily used in electric-railway car-trucks to confine the motor and prevent it from shifting its position on the axle. While its use for such purpose is preferable, it may be omitted from wheels where motors are not attached to the trucks.

In Fig. 6 is shown a modified form of brakeshoe 6, longitudinally divided into sections 26 and 27, adapted to be bolted together around the axle. In this form while more effective with the sections combined it is 0perative with the section 27 omitted, the bosses 16 and shanks 15 for securing it to supporting-bars 5 being both integral with section 26.

By providing the wheels with friction-disks the necessity for independent disks on the axles is avoided, thereby reducing the number of separate parts required, economizing space, increasing the effectiveness of the brake, and rendering both brake and car Having thus fully described my invention,

what I claim to be new, and desire to secure by Letters Patent, is

1. The combination of aframe, an axle journaled in the frame, a pair of trackwheels fixed on the axle, each having a friction-disk integral with its inner web, concentric to the axle, friction-plates removably secured to the friction-disk of each wheel, a brake-shoe for each wheel, adapted for engagement with the plates of its disk and movably supported by bars secured to the shoes and resting on the frame, and means to simultaneously advance the shoes to engagement with the plates of the disks, and adapted to retract them again from such engagement,substantially as shown and described.

2. The combination of a car-truck frame, an axle j ournaled in the frame, a pair of trackwheels fixed on the axle, a friction-disk integral with the inner web of each Wheel concentric to the axle, a brake-shoe for each wheeLmovably supported by bars secured to the shoes and resting on the frame and adapted for engagement with the disk of the wheel, shafts connecting the shoes by right and left threaded engagement respectively therewith, adapted, when rotated in one direction, to advance the shoes to simultaneous engagement with the disks of the wheels, and, when rotated in the opposite direction, to retract them from such engagement, and means to rotate the shafts simultaneously forward or I to connecting the shoes on the same side of the frame in parallel and opposite relation to their respective disks and to the shoes and disks of the other side, movably supported by the frame, shafts connecting the shoes of one side with shoes of the other by relatively right and left threaded engagement therewith, adapted, when simultaneously rotated in one direction,to simultaneously advance the shoes of both sides of the truck outwardly to engagement with their respective wheel-disks, and, when rotated in the opposite direction, to retract-them from such engagement, and means to simultaneously rotate the shafts forward or backward.

4. The brake mechanism herein described, comprising car traction-wheels mounted on axles journaled in a frame, disks integral with the inner webs of the wheels concentric to their axles, friction-plates removably secured to the disks, bars, movable laterally, supported operating substantially as vshown and de- I0 by the frame on opposite sides thereof in parscribed.

allel relation, brake-shoes secured to the bars In witness whereof I have hereunto set my and supported thereby in position to contact hand this 22d day of March, A. D. 1900,

5 with the plates of the disks, and means con- 1 nected to the shoes adapted to simultaneously HERBERrl PUTNEY advance each shoe into frictional contact with Witnesses: the plate of a wheel-disk, and again retract F. S. lVIACOMBER, them from such contact, all constructed and HERMAN H. MARTIN;

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