US363382A - Car-brake - Google Patents

Description

(No Model.) 2 SheetsSheet 1. H. M. GLINES.

UAR BRAKE.

No. 368,382. Patented May 24, 1887'.

(No Model.) 2 SheetE-Sheet 2. H. M. GLINES.

GAR BRAKE.

No. 363,882. Patented May 24, 1887.

N. PETEns PhoirrLiflwgmpher. Washington. 0. c.

rarns "arnn'r CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 363,382, dated May 24, 1887.

Application filed May 8, 1886. Serial No. 201,622. (No m del.)

To aZZ whom, it may concern:

Be it known that I, HUMPHREY M. GLINES, of Boston, in the county of Sufiolk and State of Massachusetts, have invented a new and useful Improvement in Brakes for Railway Trucks, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention consists of an'apparatus for braking-that is, applying brakes-to check the speed of railway-car trucks of all kinds, whether propelled by steam, horse, or other power, in which device I employ and utilize the momentum power of the moving car by means of the saidapparatus to apply and hold the brake-shoes against the face of the truckwheels, instead of using hand-power, which is and has been the more usual way, my method being to affix to the circumference of the revolving axle to which the truck-wheels are attached a serpentine screw, and attached to a shaft, which said shaft is placed at a convenient angle from the said axle, is a cog-wheel, the cogs of which may play in the serpentine screw referred to. The revolution of the axle and serpentine screw thus imparts a slow rotary motion to the cog'wheel, amounting to turning one or more cogs to each revolution of the axle and causing like revolution of the shaft. I construct the wheel now with twenty cogs, which number may, however, be varied to any more practicable and desirable number. To the said shaft is attached a chain, which chain is also attached at its other end to the rod of the lever governing the brakebeam. The revolutions of the said cog-wheel, which transmits its motion by its frictional attachment to the shaft upon which it is placed,

take up the chain by coiling it around the shaft, thus operating the levers controlling the brake-beam and applying the brake-shoes to the wheels of the truck. I have this shaft so arranged that when I desire to release the brake I may by a lever or such system of levers as may best be adapted to the construction of any particular car to which my invention may be applied easily raise it until the cogs of the wheel are not longer embraced by the serpentine screw, and I may again apply the power by releasing my lever and allowing the cog-wheel to fall, and again by its own gravity connect with the serpentine screw,

where it is held by a selfloeking toggle-joint,

which can only be unlocked when the liftinglever is again applied to the revolving shaft.

The revolving shaft before referred to, the

function of which is to take up the chain controlling the brakelever, receives its motion from the cog-wheel; but lest the momentum of a rapidly-moving train should be so suddenly checked by entirely stopping the revolution of thetruck-wheels, and consequent pos sible injury to the tires of wheels and track that might ensue from the car sliding upon the rails, I, instead of rigidly affixing the cogwheel to the shaft, place it loosely thereon be-, tween two collars, one of which collars is rigidly affixed to said shaft, and the other so atfixed as to prevent a rotary motion thereon, but capable, however, of longitudinal motion, and by means of a powerful spring, the ten, sion of which may be regulated by a nut or nuts, I cause the collars to hug the cog-wheel between them, holding it between them by friction, and by careful adjustment of this spring I am enabled to apply any desired amount of friction of-the brake'shoes upon the truck wheels, less than enough to entirely stop their revolution, which, when accomplished, will equalize the friction of collars upon the cog wheel, causing the same to slip upon shaft without revolving it or extending further frictional power to the brakes.

I aim to construct my invention with such balance-weights as may be necessary to make tion of my invention and the construction I' have thought most preferable, I refer to the two sheets of drawings accompanying and forming part of this specification.

In said drawings, Figure 1 shows a general perspective view of my invention and its attachment to the truck in the manner I have taken up by being wound around shaft G,

drawing with it the brake-rod E, thus working the lever M and effecting the application of brake to wheels in manner apparent from drawings, although I do not confine the application of my invention tobrake-beams, levers, and shoes of the construction described, but reserve my means of applying the momentum power as embodied in my invention to any system of mechanism forming a frictional brake; neither do I claim as my invention herein described the brake-beam Q, connection N, shoe'O, lever M, suspensory rods Z, or connecting-rods IV, but have chosen for present purposes to apply my invention to this construction of brakes, and have shown the same in my drawings, that the action and effect for the purposes set forth of w my invention maybe plainly understood. 7

. Fig. 4 shows'sectional view of shaft G, with arrangement thereon of the loose cog-wheel K and binding-collars on either side, the tensionspring H, whose function it is to cause the collars to frictionally grip and hold the cogwheels and nuts at G, used to regulate the tension of spring II and the bearing R of shaft G in arm B.

Fig. 5 is a perspective view, partially showing the construction and combination of shoes 0, brake-beam Q, leversN and E, to which I have preferred to attach my invention to form a perfect and complete brake.

To operate my invention, I have for the purposes of this specification shown a lifting-button, T, so arranged as to catch and hold in the position shown in Fig. 1; butwhen pressed inwardly to unlock and fall to the position of T in Fig. 3 to the inner side piece, with hook U, connecting with arm-lever A, to which, at its other arm, is attached rod B, connecting with the second arm-lever, 0, from which, by rod S, is applied the lifting-power, by which the shaft G and its appendages are raised. I, however, do not claim or confine myself to this particular combination of lovers, rods, lifting-button, 860., in operating my invention; but any arrangement that is best adapted to the'construction of the car upon which my invention is used may be chosen.

I have considered that a hand-lever on the platforms of passenger-cars and the same on the top of freight-cars to be desirable, while the device in this specification described might be most practical on horse-cars. The rod B (shown in Fig. 1) might be extended, also as shown by dotted lines, and by a practicable coupling connected to similar brakes on other cars in the train, so that all brakes might be applied or taken off simultaneously by one person and one applicationof power to the rod B and its connections.

By referring to Fig. 2 it will be seen that what I shall term the rear end of shaft G is set in a bearing in an arm firmly bolted to frame of truck, while the other end is attached to the strong arm R and its extreme end 1nserted in the lower end of lever D. By referring to Fig. 3 it is shown that this lever D is so constructed that when released and shaft G dropped to apply the brake it strikes a pmstop in D after passing the center, thus looking the shaft G down, so that the lifting force of screw L cannot lift the cog-wheel K out of place.

In Fig. 3 the brake is shown as applied, the dotted lines at various places showing the positions that the various parts take in Figs. 1 and 2 when the brake is off. Dropping button T releases lever A from position shown by a, causing rod B to recede from posltlon shown by b and lever O to change from posishaft G down until cogs of wheel K play in I screw L, which, by revolving on truck-axle, gives a worm-power, revolving wheel K and shaft G, thus windingthe chain F, drawing the rod E and workinglevers M and N and applying brakes, as shown in Fig. 4; also, transmitting power to brake-bar at other end of truck by rod W, the revolutions of shaft G continuing until the friction of the shoes 0 upon surface of car wheel shall exceed the frictional clutch-holding wheel K, when the wheel K will slip upon shaft G without revolving the same, the frictional clutch of collars holding wheel K being regulated by nuts at G, Fig. 4. tension of the spring II by a gravity attachment from bed of car, causing it to adjust as the car may be more or less heavily loaded.

I therefore claim as my invention- I 1. The serpentine screw L on the revolving axle of a car-wheel, in combination with cogwheel K, friction-collars, spring H, nuts and screws G, and shaft G. p y

2. Lever D and plate D, with pin-stop, in combination with shaft G,'wheel K, screw and rod E, applied to and in combination with a frictional brake for railway-trucks, all substantially as and for the purposes above set forth and described.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 3d day of May,-

Witn esses W. HAYNES, H. DUNHAM.

I also contemplate regulating the 95 ing its center to stop-pin on D, dropping

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