US1065220A - Impulse-valve. - Google Patents

Description

J. D. 'GLAY.

IMPULSE VALVE. I APPLICATION FILED 00124, 1912.

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J. D. CLAY.

IMPULSE VALVE.

APPLICATION FILED 001224, 1912.

1,065,220, Patented June 17, 1913.

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IMPULSE-VALVE.

Specification of Letters Patent.

Patented June 17, 1913.

. Application filed October 24, 1912. Serial No. 727,613.

To all whom it may concern Be it known that I, JOSEPH D. CLAY, citizen of the United States, residing at Enola, in the county of Cumberland and State'of Pennsylvania, have invented certain new and useful Improvements in Impulse- Valves, of which the'following' is a specification, reference being had therein to the accompanying drawing.

This invention relates to impulse Valves and'has for its object the production of an efiicient mechanism for preventing the escape of air in a train pipe in case the pipe should become broken at any point along its line.

Another object of this invention is the production of a simple and etficient valve mechanism which will allow sufiicient air to pass therethroughto operate the brakes under ,ordinary circumstances, but which will automatically cut off the usual flow of air through the valve in case the train pipe should become broken at any point along its line. a

WVith these and other objects in view this invention consists in certain novel combinations, constructions, and arrangement 01 parts as will be hereinafter fully described and claimed.

In the accompanying drawings :F igure 1 is a central longitudinal sectional view of the valve. Fig. 2 is a central longitudinal sectional view of the valve showing the same in its closed or thrown position. Fig. 3 is a' section taken on the linev33, of Fig. 2. Fig. 4 is a section taken on the line 44, of Fi 1. s v

y referring to the drawings by numerals it will be seen that 1 designates the casing of the valve which is provided with the primary' compartment 1 and an auxiliary compartment 2. A valve containing compartment 3 is also formed in the casing 1 of the valve, and a partition 4 is formed Within the valve and separates the compartments 1 and 2. A partition 5 extends vertically of the valve casing l .and separates the compartment 1 from the compartment 3. A partition 6 is also formed in the valve to close the rear endof the compartment 2, and this partition 6 terminates in an upwardly ex-'.

tending apertured partition7 through which partition 7 passes the cylindrical valve 8. An aperture 9 is also formed in the partition 5 through which the cylindrical valve 8 passes. An aperture 10 is also formedin the partition 5 near its lower end through which the air is adapted to pass into the compartment 3. A thickened portion 11 is formed upon the partition 6 and constitutes a stop for limiting the sliding movement of the cylindrical valve in one direction. An air inlet opening 12 is formed near the rear end of the casing 1 to which is adapted to be attached the train pipe. A drain aper ture 13 is formed near the bottom of the compartment l and this aperture 13 is normally sealed by means of a threaded cap 14 as illustrated in Fig. 1.

A projecting aperture collar 15 is formed upon the upper face of the valve casing 1 and the aperture of this collar 15 is closed by means of a cap 16, which cap is threaded upon the upper end of the collar 15. It will be seen that the aperture 17 formed in the collar 15 will facilitate access to the interior of the valve mechanism. An aperture 18 is formed .in the partition 4 near its front end, and through this aperture is passed a funnel 19 for directing air from the compartment 2 into the discharge end 20 of the casing 1. The discharge end 20 of the casing 1 is internally threaded as at 21 for receiving the externally threaded Washer 22, which washer is provided with a plurality of apertures 23 for allowing the passage of air through this washer. The washer 22 is provided with a rearwardly extending integral collar 24,

which collar passes over the stem 25 of the valve mechanism hereinafter described.-

A plunger head 26 is carried by the stem 25 and is also secured to a connecting rod 27, which rod engagesv the collar 28 of the plunger head 26 and the valve member 8. The collar 24 is freely slidable upon the stem 25 so as to allow the plunger head 26 to have free sliding movement relative to the valve casing 1. It will, therefore, be seen that the washer 22 may be adjusted longi tudinally of the casing 1 if so desired.

A longitudinallyextending slot or groove 29 is formed upon the under face of the partition 4 and is slightly longer than the relative length of the plunger head 26. The rear end of the plunger head 26 is normally positioned so as to extend. beyond the rear end of the slot 29 so as to prevent the pas- "sage' of air through the compartment 3 into the discharge end 20. When the train line pipes are filledwith air ready for service theair pressure on each side of plun er head 26 is equal. Then, if there is any isconnection of train line pipe, due to burst ing of the air hose or other cause, the pressures on opposite sides of plunger head 26 become unequal, causing plunger head 26 to be forced-against the spring 2% and assuming the position shown in Fig. 2, thereby allowing the air to pass from the com partment 1 to the compartment 3, through the slot 29, through the apertures 23 formed in the washers 22 and there be discharged out through the discharge end 20 of the casing 1. It will, therefore, be seen that the air pressure will not escape and cause the instantaneous application of the brakes as heretofore, causing loss of life and destruction of property. In caseithe throw valves or other mechanism communicating with the train pipe line should become injured or broken the valve 8 would slide to the position as shown in Fig. 2, and since-the rear end of the valve is closed the air will b-e-prevented from passing into the compartment Qatits full pressure as usual. Of course, it should be understood that in the structure as illustrated in Fig. l the air can pass through the compartment 1 through the compartment 2 and through the funnel 19 into the discharge end 20.

Having thus described the invention what is claimed as new, is

A valve of the class described comprising a casing, said casing comprising a primary compartment and an auxiliary compartment, a valve containing compartmentadjacent said primary and auxiliary compartments, a valve slidably mounted Within said primary compartment and said valve containing compartment, a partition separating said primary and auxiliary compartments and also separating said auxiliary compartment from said valve containing compartment and rovided with a longitudinally exten ing groove upon its under face, said valve provided with a plunger head, spring means exerting a rearward pressure upon said plunger head, aguiding pin, a washer adjustably secured within said valve containing compartment and provided with a rearwardly extending sleeve, said pin working within said sleeve, said longitudinally extending groove being longer than the relative length of said plunger head for facilitating the passage of air through said groove when said plunger head is brought to a position centrally of said groove, said valve provided with longitudinally extending slots for normally facilitating the passage of air through said slots from said primary compartment to said auxiliary compartment, and a discharge funnel communicating with said auxiliary compartment and said valve containing compartment for allowing the passage of air in ordinary circumstances from said auxiliary compartment to the discharge end of said casing.

In testimony whereof I hereunto affix my signature in presence of two witnesses,

JOSEPH D. CLAY.

\Vitnesses G. E. SHINTON, A. L. MILLER.

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