USRE11071E - Automatic valve for air-brakes - Google Patents

Description

A H. GUELS. Assignor by niesne assignments to THE WESTINGHUUSE AIR BRAKE COMPANY.

` AUTDMATIG VALVE FOR AIRBRAKES. No. 11,071.

Ressued A111215, 1890.

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'UNITED STATES' PATENT OFFICE.

HERMAN GUELs, or s'r. LoUIs', MISSOURI, AssIGNoR, BY MESNE ASSIGN- MENT, To THE WEs'rINeHoUsE AIR BRAKE coMPANnor PITTSEURG,

PENNSYLVANIA.

AUTOMATlCl/ALVE FOR AIR-BRAKES.

SPECIFICATION forming part of Reissed. Letters Patent No. 11,071, datedl April 15, 1890. Original No. 384,686, dated` June 19, 1888. Appli-nation for reissue :filed March 14; 1890. Serial No. Bi.

To all when?, t may concern:

Bc it known that I, HERMAN GUELS, acitizen of the United States, residing at St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Automatic Valves for Air-Brakes; and I do hereby 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 appcrtains to make and use the'same, reference being had to the accompanying drawings, and to thc letters of reference marked thereon, which form a part ofA this specification.

Figure l is a longitudinal vertical section'v of the valve-shell, with the valves partly in section and partly in elevation; and Fig. 2 is a plan view or diagram of the system, Ashowing the arrangement of the valve and its relation to the train-pipe and reservoir.,

Like lettersand iigures referto like parts' to escape from one side of the piston, While the expansion of the air on the other-side of the piston applies the brakes, and has for its objects, first, the production of a simple and sensitive exhaustvalve whereby the air may be quickly exploded or discharged from the maiden-supply pipe or train-pipe of the system, so as to actuate the several successive- `tion,jand .D the branch pipe leadlng from valves of the system without a-Inaterial or appreciable interval between the operation of the several valves; and, second, an equally,v

cally actuated by change of pressure in thev train or main-supply pipe has arisen from the slowness with which the pressure fell in the 'system as a whole, the wave of reduction re- .inderror main supply-pipe, andl which opens both the main supply-pipe and the cylinder. The exhaust-portsior the main supply-pipe and for the cylinder should bear some relation Vto the capacity of said cylinder and main supply-pipe, in order to obtain the best results.

' To simplify the construction, it is desirable to actuate the compound exhaust-valves from the supply-valve of the cylinder.

I will now proceed to describe my invention more specifically', in order that others skilled in the art to which it appertains may apply the same.

In. the drawings, 'l indicates the main or train pipe; R,a reservoir or expansion-chamber, and S the cylinder of` an air-brake sys..v

tem with which my valve may be used.

L indicates an equalizing valve-operating device for eqnalizi-.ng the pressure between the reservoir and train-pipe, a full descrip- .tion of which will be found in my application,

Serial No. 253,638, of even date herewith; but

as the same forms no part of thefpresent nvention I do not herein describe it.

V indicates the valve embodying my inventrain-pipe T to the valve V, cylinder S, and reservoir R.

A indicates the lower section, and B'the upper section, of the valve shell or easing, which casing I preferto make in two sections, as

IOO

finished to form acylinder-section as lfor the Y. reception of a piston-valve C, and is grooved section B. Its interior is bored'or otherwise to form a port, as at a, which is opened and closedljiy the movement of said piston C.

lhe' upper section B of the shell is provided with a port b, which leads to the main air-supply or. train pipewith an exhaust-port l1', provided with a bushing-or'seat-plug b2, a guide-recess b3 for the stem of the pistonvalve, andra flange 112er equivalent means, for securing it to lower shell-section A. Ar-

ranged wthin said casing or shell-sections are,

first, an exhaust-valve D for the main airsupply pipe; s'econdly, an exhaust-valve E for the cylinder, and thirdly, a supply-valve C for the cylinder, and the several valves are combined so that their movements are in a measure dependent one on the other. The exhaust-valves D4 and E are preferably winged valves, as shown, while the valve C is preferably a piston-valve having a ring-packing c. lI generally use but a single ring for the packing c, as a slight leak is desirable rather than objectionable, as under some conditions-fas, for instance, accidental slight leakage in the main supply-pipe-it will act' to' preserve or restore the equilibrium be'tween'thel ,'re'ssnre in shell-section A and shell-section G indicates the stemof piston-valve C, the upper end. of which may enter'guide-recess b of shell B, while its lower end has an elongated slot' g for thel receptionof a pin cyby which it is loosely connected to the exhaustf valve E. This elongated slot is ver importantfo'r two reasons-viz., first, it lows an independent upward movement of. stem G 'sui'cien-tly to unseat fthe exhaust-valve D bestem G to insure the seating of valve D beforethe motion of stem G is arrested.

The exhaust-valve Ev hassocket e' for tthe reception ofthe lower Vend 'of stem G, and said socket is provided with ports or open.- i'..'gs e2, to permit the free discharge of any dust, ywhich might otherwise accumulate and impede the'free movement between thevalve E and stem G.

The exhaust-valve D lmay be lightly supported by a spring d, toinsureiits seating; but thisis not essential, as the 'valve will usually be held up to its seat by the weight of the long arm of lever F, and the air-press' Inre in the main supply-pipe, except .at such times as it is opened by' the movement of valve-stem G. 'l

Upon the stem of valveD is a pin d',which engages in a fork on the short arm of a valvelever F, which lever has its fulcrum on the shell, as at f. The opposite or long` arm of valve-lever F has'also a fork, which engages a pin g on theupper'end of stem G; but the fork-on the long arm of the lever F is sufficiently wider than the'pin g', which it engages, to permit the stem G and its pistonvalve C to move up sufficiently to pass the port a* and close the ,connection between the upper and lower chambers iof the'shellbeforeI l valvewill be partially restored, ,the pressure on piston-valve C, whichv operates the valves' D E, willV be reduced, and the exhaust-valves'- will not be as quickly and fully opened.

The devices when imposition for use will be connected by the "port a, with the brakecylinder and-by the port b with the main airsupply pipe. of pressure in the main supply-pipe, provided said reduction is-sudden, (and .notslow and gradual,-as inleakage,) the equilibrium of Upon the slightest reduction.

piston-val've-C will be disturbed, and it will rise from the pressure 'in the brake-cylinden In its upward movement it will'` first close the port a. Then the pin g on the stem G will' strike andcarry-up 4the long'arm -of valve-V leverF, depressing the short arm' and partially opening exhaust-valve D. This partial opening of exhaust-valve D will instantly deplete the main supply-pipawhich largely, reduces the pressure iu the.. upper -side of piston-valve C, whereupon the sudden expansion of..,the air. inthe brake-.cylinder will drive up the valve yC and suddenly open the exhaust-valve E, so as to exhaust the 'air' from the brake-cylinder suddenly-and feraibly.y The instant the brakesystem is given air the 'pressure in the main supply-pipe'will enter port b, seat exhaust-valve D, depress piston-valve C, open port a4, enter the lower section A of the shell, seat exhaust-valve E, lill the brake-cylinder, and restore the equilibrium of .pressure throughout thesystem.

Among the advantages of jfmy'f'invention are, first, the simplicity of the valve-shell and valves, which enables me to make tight and eiiicient valves Without skilled labor or lspecial tools; secondly, the few elements composingy theoperative combinations and their sim- IOO ple structure, which enables me to readilyl y combine and adjust them so as to insure accuracy of action and great' durability with nonsliabilifty to get'out of order, and, thirdly, the several valves being combined by pins and leversthe action of one-upon the other4 must be positive and-not liable tovary from lost motion, wear of parts, 85e.

Ido not herein broadly claim the combination, with a balanced valve, of an exhaustvalve vfor the cylinder and .an exhaustfvalvc Y for the train-pipe, said exhaust-valves actuated from the.l balanced valve, as the sanie.

brake mechanism, the combination of a mainv valve-operating piston arranged to slide in the main valve-casing, a passage in the casing, whereby air may pass from one side of the piston to the other side, an exhaust-passage from the train-pi pe to the outer atmosphere, and an exli aust-valve controlling said passage and so arranged as to be opened by the movement of the piston on a `reduction of trainpipe pressure, substantially as set forth.

2. In an automatic valve for a1' r-brakes, the

combination of a pistonfvalve,- a port which is opened and closed thereby, an exhaustvalve, and a lever for'actuating the exhaustvalve from the stem o f the piston-valve, the connection between the piston-stem and lever being loose to allow of an interval of motion for the valve-stem before it actuates the lever and exhaust-valve, whereby the port'of the is'opened, substantially as and for exhaust-valve for the cylinderylooselyi con-.

nected to the stem of the piston-valve topermit an interval of movement in the pistonvalve before it actuates the cylinder exhaustvalve, substantially as and for the purposes specified. y

' 4. In an automatic valr'e-for air-brakes, the combination, with a piston-valve, of a puppet exhaustvalve for -the train-pipe and a puppet exhaust-valve for the cylinder, said exhaust-valves connected with and actuated from the stem of lthe piston-valve, and said valves relatively arranged within the valveshell, so as to be held ou their seats by the pressure in -the train-pipe, substantially as and for the purposes specified.

l5. In an automatic valve for air-brakes, the combination of a shell composed ot' two sections A B,' each having an exhaust-port, two exhaust-valves to control intermediate balanced valve for controlling the exhaust-valves, substantially as and 'for the purposes specified.

In testimony whereof I have aixed lmy sig naturein presence of two witnesses.

' HERMAN GUELS.4 Witnesses:

R. H. Wmmnsuv, GEORGE H. CHRISTY.

said ports, and an

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