US 1147242 A
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Description (OCR text may contain errors)
E. O. HENTSCHEL & W. C. HARTING.
AUTOMATIC BRAKE RELEASER.
APPLICATION FILED OCT. 19 1914- v Patented July 20, 1915.
l m X 0o ill" II? /1 "UNITE STATES A'r N'r orrICEgf f' EDWARD o. HENTSCHEL, oFcIncmNAT- ANDWILLI'AM e. HAR'II-NG, or nLMwooD PLACE, OHIO.
To all whom it may concern Be 11; known that we, EDWARD O. HENT= Hamilton and State of Ohio, and WILLIAM F. C.- HARTING, a citizen of the United States, and a resident ofElmwood Place, in
. the county of Hamilton and State of Ohio,
have invented certain new and useful Ims provements in Automatic Brake-Releasers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.
Our invention relates to air brake constructions such as are in use generally for controlling railway cars, and the object of the invention is to provide means for automatically releasing the air brake, after the brakes have been set by the action of the compressed air. i
In the ordinary construction in general use of railway cars, the compressed air is confined in a cylinder secured underneath the car, and when cars have been uncoupled or any break occurs in the line, the brakes are set and it is necessary to release the compressed air in the cylinder under each car to relieve the pressure from the piston controlling the brakes. In the ordinary equipment, each cylinder is provided with a relief valve for this purpose operated by a double acting lever which'can be actuated from either side of the car. The relief valve is held'shut by the compressed air and in each case has to be held open until the air is released. This takes time and as a result the starting of trains, usuallyfreight trains, is very seriously delayed, adding to the danger of blocking the line, while the operatives are frequently obliged to hang on to the side of the car, after the train has started, to hold open the valve, thus endangering their lives and increasing the dangers of operation.
It is the object of our invention to remedy these defects by that certain novel construction and arrangement of 'parts to be hereinafter set forth and claimed, in which a bleed valve is introduced into the escape pipe arranged to be held open automatically by the escaping air and to close by gravity when the air pressure is relieved.
In the drawings, Figure 1 is a side elevation of a portion of the air brake cylinder w th our d ise m u t d t reon 2 Specification of Letters Patent,
Patented uly Application flied October 19, 1914. seriai'no. 867,275.
is acentral longitudinal section illustrating the ordinary'air releasing valve with our.
mprovements applied thereto. Fig; 3 is a front elevation of the same, with the casing partly broken away. 7 Fig. 4; is a detailview showing the method of applyingour valve 1 where the relief cylinder.
1' is a portion ofthe ordinary air brake reservoir, and tapped into the cylindereither at top or bottom is a relief pipe con-1 taining the ordinary air release valve.
Since we prefer to merely insert our im= provement in an ordinary air-brake bleed device, we have illustrated our improvements as merely added to the ordinary Westinghouse construction, and have adopted the levers used in such a device for trippingour valve as will be apparent. In this ordinary construction, the coupling 2 is secured di rectly. into the compressioh cylinder, and this coupling is provided with anupwa'rdly extending screwthreaded portion 3 upon pipe. is at the bottom of the which-is screwed the'cap 4:. The cap 4 is formed with an air passage 5, 'which fis closed by the valve. 6, seated at 7. The valve isIreturned to its seat when the air pressure is relieved byjthe coiled spring! 8 mounted in a recess in the coupling and surrounding the depending stem 9' of" the valve. The valve stem also extends upwardly at-lO, when it is acted upon by the lever 11 with the two arms 12 and 13. The lever 11 is seated in a slot'14 in the cap and engages on either side a pin 15,- 15, one of these pins acting as a fulcrum for the lever when the lever arm on the same side of the pin is actuated. The lever arms 12 and 13 are connected by links (not shown) to the sides of the car, so that from either side the lever can. be actuated. By pulling on the lever arm on either side, the 'stei'n'lO'i's depressed, opening the. valve and allowing the air to pass out around the stem 9 through the air port 5. This is the ordinary and usualron struction, and it is evident that in order to I, relieve the air, it is necessary for the oper- I toinatic valve involving our invention. The" I releasing valve is mounted in a suitable easing s id e With a sere d ddepending stem 17 to screw into the reservoir and with a coupling nut 18 to screw onto the coupling tube. From this casing 16 leads an air port 19 which is closed by the valve 20. This valve 20 is pivotally mounted on the pin 21 secured in the side walls of the casing, and the valve is raised, by the bell crank lever 22, pivotally mounted on the pin 23 also secured in the casing. One end of this bell crank leverv is provided with a pin slot connection 2-1 coupling the same to the valve 20, and the opposite end of the lever is formed with a head 25 projecting under the lower end of the stem 9 of the ordinary valve. Into the opening through the stem 17 we prefer to fit a tube 26, with a beveled upper end 27 to direct the current of air toward the valve 20.
It will be evident that this construction when the valve stem 9 is depressed by the actuation of either of the levers 12 or 13, that the lever 22 will be rocked to raise the valve 20 into the position shown by dotted lines in Fig. 2. The instant this happens, the outrushing air holds up the valve 20 away from its seat. The compressed air in stantly escapes through the port 19. As soon as the air has escaped and the pressure relieved, the valve 20 drops back to its seat by gravity, or if desired a spring can? be employed. In the event that the opening in the air brake cylinder 1 is at the bottom, we furnish a U-shaped piece of pipe 28 so that the valve casing can be attached in an upright position.
With the use of our improvements, the operator has merely to give a pull to the lever 12 or 13, and the valve is dropped and held open by the escape of the air. He therefore does not have to hold the valve open.
As we have stated, we have illustrated our construction as a mere addition to the ordinary construction, utilizing the valve stem and lever operating means to trip our release valve. Instead of using the old construction for this purpose, of course any suitable means can be employed for tripping the relief valve and the same results will be attained. Our construction as illustrated, however, is especially adapted for utilization with the air release valve now in use, because it requires nothing but the insertion of the casing 16 between the old valve and the cylinder.
Having thus described our invention, what we claim as new and desire to secure by Letters Patent, is
1. In a device of the character specified, a casing having an outlet port therein for escaping air, and an inlet port for escaping air, said outlet port formed in a side wall of the casing and a valve suspended over the outlet port to close the same, said inlet port being, so positioned beneath the valve that a slight movement of the valve will bring it into the line of the air escaping through the inlet port whereupon the air will hold the valve open, for the purpose described.
2; In a device of the character specified, a casing having an outlet port therein for escaping air, and an inlet port for escaping air, said outlet port formed in a side wall of the casing and a valve suspended over the outlet port to close the same, said inlet port being so positioned beneath the valve that a slight movement of the valve will bring it into the line of the air escaping through the inlet port whereupon the air will hold the valve open, and means for tripping the valve to bring it into such position, for the purpose described.
3. In a device of the character specified, in combination with the air brake cylinder, a casing, an inlet port from the cylinder to the casing, an outlet port therefrom and a valve to close said outlet, the valve located in line with the inlet port, a bell crank lever coupled to said valve at one end, a spring controlled rod to actuate said lever to open the valve, and a lever to actuate said rod from outside the casing.
In a device of the character specified, a casing, an outlet port for escaping air, a valve in the casing, pivotal means for mounting said valve in line with the escaping air whereby when slightly opened it will lie at one side of the escaping jet and be held open thereby, and when closed it will be subjected to the air pressure, and means for tripping said valve independent of the pivotal mounting means, for the purpose described.
EDWARD O. HENTSCHEL. WILLIAM F. C. HARTING.
WVitnesses EARL W. GRIFFIN, KATHERINE SMITH.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.