US1201966A - Automatic emergency-brake. - Google Patents

Description

D. -l. HULLETT.

AUTOMATIC EMERGENCY BRAKE. a

APPLICATION FILED NOV. 26, 1915.

Patehted Oct. 17,1916.

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D. l. HULLETT. AUTOMATIC EMERGENCY BRAKE. APPLICATION FILED'NQV. 26. 1915.

1.,Q01,966. Patented Oct. 17, 1916.

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awoewboz @nnrp g 133. HULLETT, OF BOWLIHG GREEK, KENTUCKY, ASSIQNOR OF ONE-HALF WILLIAM RENE, 7 RABGLD, 0F BO'WLING- GREEN, KENTUCKY.

AUTGMATIC Ef-ZEEtG-ENCY-BRAKE.

Specifications? Iietters latent.

Patented (let. it, 121% Application filed. November 26, 1915. Serial No. 63,564.

To all whom it may concern:

Be it known that l, Dxvm lsanonn HUL- LnT'r, a citizen of the United States, residing at Bowling Green, in the county of fv arren and State of Kentucky, have invented certain new and useful Improvements in Automatic Emergency-Brakes; and i do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to railway safet' appliances, and it has particular reference.

to cars equipped with air brakes.

[a primary ohjectof the invention is to provide an attachment for such cars whereby the brakes may be automatically applied in case of derailment of the car, the breakage of an axle, or any undue strain upon the draw-heads.

Another object of the invention is to provide a device which will automatically and instantaneously apply the ordinary air brakes with which most cars are equipped to the whole train the instant an accident happens, without requiring special atten tion on the part of the trainman to properly set the brakes the critical moment.

A further object of the invention is to provide a device which is simple and durable in construction, inexpensive to manufacture and one which will be very eiiicient in operation.

With these and numerous other objects in view my invem-ion consists in the novel features of construction, combination and arrangement of parts which will be hereinafter referred to and more particularly pointed out in the specification and claims. In the accompanying drawings: Figure 1 is a plan view of my invention showing the same applied to a portion of a' freight car; Fig, 2 is a longitudinal section taken on the line 2-2 of Fig. 1; Fig. 3 is a transverse section taken on the line 3-3 of Fig. 1. In describing my invention 1 shallrefer to the drawings in which similar reference characters designate corresponding parts throughout the several views.

My invention is shown in the accompanying drawings sing applied to a. freight car, which comprises the usua type of body 1, having disposed beneath the same trucks 2 having axles 3, and said trucks being arms 7 projecting laterally therefrom in a manner which will be hereinafter more fully set forth. The freight car to which this device is applied is provided with one of these valves for each of the axles, each valve being connected up with the safety brake applying mechanisn'i, and as said mechanisms are similar in structure and operation, for the sake of brevity I will explain in detail only one of these appliances.

Disposed adjacent the valve 6 in the train pipe 5 and positioned slightly below the same is a rock shaft 8, that extends transversely beneath the floor of the car 1. Intermediately the ends of the shaft 8, is a laterally extending arm 9, which is connected with the end of the operating lever 7, through the medium of the chain 10. By these means upon the movement of the shaft 8, the lever Twill consequently be turned and the valve 6 will be opened to apply the air brakes to the car. The rock shaft 8 is provided adjacent its end with another laterally extending arm 11, which arm is connected with the brake beam 4, through the medium of a rod 12, and chains 13. These chains 13 are secured to either end of the rod 12 and have their free ends socured to the adjacent portions of the beam 4 and the arm 11. Secured to the truck of the car is a bracket 14, which has a projecting centrally apertured foot 15 at its lower end, through which the rod 12 is adapted to slide. The rod 12' has secured thereto a stop member 16 a short distance above the foot 15 of the bracket, and between these two portions and surrounding-the rod is a balancing coiled spring 17, which is adapted to hold the rod 12 in position. By this form of connection it will be obvious that the moment the brake beam t drops from position. the arm 12 will be pulled down owing to the connection between said beam and arm and the rock shaft 8 will 'be moved to the car and has secured thereon a bell crank lever 19. The bell crank lever 19 is pivotally, connected with the rock shaft 8through the medium of a pair of connecting rods 20 and 21, which are pivotally connected at one end, and the arm 20 being pivotally connected with the end of the lever at its opposite end, while the arm 21 is securely fas tened at its free end to the rock shaft 8. By this connection it will be obvious that upon any movement of the bell crank lever the same will be transferred to the rock shaft 8.

The lower end of the bell crank lever 19 has secured thereto a chain 22, on which is fastened a downwardly extending rod 23 having a loop 24 on its lower end and which is adapted to surround the axle 3' and be spaced therefrom; A bracket 25 is secured to the truck and the said bracket has a centrally apertured foot 26, through which the rod 23 is slidably mounted. The said rod has fastenedor secured thereto a collar 27, a short distance above the foot 26, and positioned between these two parts is a coil spring 28 which acts to retain the rod in inoperative position normally. By this arrangement of parts upon breakage of the axle the same will drop down and engage the loop 24 on the lower end of the rod 23 whereby the bell crank lever 19 will be moved, and through the connection above f describedthe shaft 8 will be rocked and the valve '6 operated, to automatically apply the air brakes and instantly stop the train.

The rock shaft 8 is provided intermediate its ends with a downwardly extending arm 30, which is secured thereto and is disposed in direct alinement with the rear of the draw-head at the end of the car. A longitudinally extending rod 31 is positioned beneath the floor of the carand said rod has its outer end 32 bent downwardly at right angles to same, and the extremity of said bent portion of the rod is positioned in a longitudinally extending slot 33 in' the upper surface of the draw-head on said car. The rear end of this rod 31 is disposed adjacent the downwardly projecting arm 30 and is connected therewith by means of a short length of chain 84. The object of the longitudinally extending slot 33 in the draw-head of the car in which the extremity of the rod 31 moved upon movement of the said draw bar, but will only be eifected when undue strain is placed upon the same. Should the drawhead pull out, or for any other reason, an undue strain is placed upon the same the rod 31 will be moved forwardly, and hence a strain will be, placed upon the arm 30 which will consequently rock the shaft 8 and operate the valve 6 to automatically apply the brakes on the car.

From the above description and the accompanying drawings it will be obvious that my improved device will immediately and automatically, upon the dropping of the brake beam, or the breakage of an axle, or the pulling out of the draw-head, apply the air brakes to the car to instantaneously stop the train, without the necessity for any manual operation of the brakes. The appllcation of this attachment to the ordinary form of car that is provided with the usual type of air brake system is a comparatively simple matter owing to the extreme simplicity of the structure used throughout my invention. This devicewill be found very eflicient, strong and durable in operation and will automaticall apply the air brakes as has been hereinbe ore pointed out. The parts of this device are always held in normally inoperative position but in such a manner that instantly upon the breakage of any of the above mentioned parts of the car, my safety device will be brought into play and the brakes automatically set.

From the foregoing descri tion of the construction of my improve device the manner of applying the same to use and the operation thereof will be readily understood, and it will be seen that I have provided a simple, inexpensive and eflicient means for carrying out the objects of the invention.

I claim:

'1. The combination with a car having an auxiliary air valve attached to the air brake system, operable b a rock shaft of separate connections betw en the axle brake beam and draw-head of the car and said shaft to rock the sameupon the application of an abnormal strain ,onany of said parts.

2. The combination with a car having an auxiliary air valve attached to the air brake system, a rock shaft to operate said valve, of an arm extending laterally from said shaft, a chain and rod connection between said arm and the brake beam, a bracket on the car through which saidrod is adapted to slide, a counter balancing spring on said rod supported by the bracket, an additional rock shaft adjacent the valve operating shaft, a bell crank lever on said shaft, a ivotal connection between one end of sai lever and the\shaft, a chain and rod on the other end 1,201,eee

of said lever, a bracket on the car through which said rod is adapted to slide, a-eoui'lter balancing spring surrmnnling the red and supported by said hracket,,a loop on the lower end of the rod surrounding the car axle, a downwardly extending arm on the valve operating shaft a reaiwvardly extending rod frenl the drmY-head, and a chain connecting the'adjaeent ends of the same.

3. The combination with a car having an auxiliary air \alveattached to the air brake system, a rock shaft to operate said valve, of

a dinvnwardly extending arm on said shaft,

a ldngitndirnilly extending; rod beneath said car with one end bent laterally and lltlVll'lQ its extremity positioned in a slot in the drawhead of the car, the other end of said rod being positioned adjacent said downwardly extending arm, and a chain connecting the adjacent ends of said arm and rod whereby the auxiliary valve is operated upon abnorinal strain on the draw-head. 7

In testimony whereof I have hereunto set my hand in presence of two subscribing Witnesses.

DAVID ISADORE HULLETT.

lVitnesses I I). C. SMITH, \V. B. GAINEs.

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