US839188A - Cylinder-cock. - Google Patents

Description

PATBN'TED 1120.25, 1906.

, lE. H. oBERToP, CYLINDER 000K. 4 LPPLITION FILED LUG. 19, 1905 f with the cylinder-cocks by one or more levers .UNITED sTArEs PATENT OEEICE.

EARL H. OBER'IOP, OE CHICAGO, ILLINOIS.

' i CYLINDER-COCK.

I No. 839,188.

Specification of Letters Patent.

Patented Dec. 25, i906.

Application filed August 19, 1905. Serial No. 274,822.

pivoted to the piston-rod and to the cam-bar actuating ,the cocks off and on their seats.

The prime obi'ects of this invention are to dispense l'with al lever connections between the aiiressure cylinder and the actuating lcam roti) or bar ,for the cylinder-cocks and to utilize steam as well as air-pressure for actuating the cocks.

A further object of this invention is to control the supply of exhauststeam and air to the cylinder actuating the cam-bar by the single, three-way cock and at such a point that said cock is conveniently accessible to the engineer and whereby at will he lmay utilizeeither air from the brake system or steam from the. boiler for actuating the cylindercocks on and off their seats.

A further object of this invention is to prolvide means whereby the cylinder-cocks will unseat when either'the air-pressure inthe brake system or the steam-pressure inthe boiler is below thenormal pressure either or bd th are intended to have, and it will be indica ed to, the engineer b the escape of conv densations from the cy inder, owmg to the automatic actuation of the cylinder-cocks of their seats by such reduction ilipressure.

sists in certain features and novelty in construction, combination, and arrangement of parts by which sald objects and certain other objects hereinafter vappearing are attained,

all as fully "described in referenceto the accompanying drawings, and more particularly pointed out in the claims. l

` In said drawings, Figure 1 illustrates a ver;

tical vsection through a 'cylinder-cockstructure containin my'invention, with a detail portion ofa cy Inder likewise shown; Fig. 2, ,lside elevation Aof a railroad-engine boiler,

inder, and the A illustrating the application of my inventionl thereto; and Fig. 3, an enlarged cross-section of the three-way cock shown in Fi 2 for regulatingvthe supply and'exhaust of oth steam y and air to the pressure-cylinder directlyA employed for actuating the cylinder-cocks.

Similar numerals of reference indicate the same parts in the several figures ofthe draw- In s.

indicates a steam-cylinder of ordinary construction rovided with openin s 5 5 in its bottom and) respectively toward t e opposite ends thereof, Into which, as shown at the left in Fig. 1, is screwed or otherwise secured a two-part cylindercock casin com rising the portion 6, screwthreaded mto t e cylpart 7, united by a screwthreaded coil 8, which when secured in its operative position impinges against a ange surrounding the part 6 and is screw-threaded upon the part' 7. In and between this twopart casing and formed partlyin each is a cone-shaped chamber 9, forming a receptacle for condensations when the valvey10 is on its seat 1 1, formed in the part 7 of the casing, but which affords a passage through -which condensat-ions in the cylinder are conducted in i their discharge from the cock.

The valve 10 is provided'with a stem 12, surrounded by an enlarged chamber 13, opening outwardly from the casing 7 at 14,

vand has on its lower end an elongated weight 15, passing through the lower portion of the casing 7 into a chamber 16, formed in the end wall 17 of a cylinder 18 and adapted to engage by gravity with a piston-rod 19, on

which 'is a piston 20 and a coiled `spring 21,

the latter surrounding the iston-rod at a pointbetween the piston an the end of the cylinder and by its expansion tending to maintain the piston in the position shown in Fig. 1 and the cylinder-cock in an elevated n t position above its seat. With these ends'm view my Invention con- The piston-rod 19is` rovided vwith cutaway portions 22, providing cam-surfaces 23, by means of which the valves and thelcylinder-cock are unseated, as shown in Fig. 1. and also seated when thelvalve-rod is move forward inthe direction indicated by.the arrow in said figure by means presently'to be described.'

Instead of the s ecific construction of valve-cock shown in ig. 1that is to sa ,in whichthe valve seats inside the shell o the IOO IIO

valve-cock-said valvemay be projected beyond the inner end of said shell and have its seat' externally of the shell, and said seat may be formed in a suitable plate 24, secured to the end of a shell, which, as shown, may be 4entirely in one piece with an enlarged continuous chamber surrounding the thereby necessarily elongated valve-stem 12 and terminating in the outlet 14, the stem being provided with a weight 15, corres ending with that shown in the structure at t e left of Fig. 1 and adaptedI to engage and be actuated by the piston 1 9' in precisely the same manner as the structure first described.

The cylinder 18 is provided with a screwthreaded cap 25, having a central perforation 26, and into which and registering with the perforation 26 is a pipe 27, which (see Fig. 2) extends upwardly preferably above the running-board 28 of an engine, and ahorizontal extension opening into the shell 29, inI which is the plug 30 of a three-way cock, which is also connected with the air-brake system (not shown) of a railroad-train by a pipe 31 and with the steam-boiler by the pipe 32 in which is anordinary stop cock or valve 33, (see Fig. 2,) a pipe 34 at a point between the ipes 27 and 32 serving as a discharge-outlet or both steam and air when released from the cylinder 18, as hereinafter described, which pipe 34 preferably extends downwardly and has its discharge-o ening at a oint below the boiler or the asli-box thereo as indicated in Fig'. 2. 1

In the plug 30 are three radial passages 35, 36,.and 37 in common communication with each other, as shown at the axis of the plug, but may be at any other point within the confines thereof, the passage 35 being for the purposes of connectionv ith the steam-supply pipe 32, the passage 36 for connection with both the air-pipe v31 and the cylindersupply pipe 27, and the assage 37 for comf-munication with both' t e cylinder-supply pipe 27 and the discharge-pipe 34.-

The passages 36 and 37 are enlarged at their outer ends i stead of, as ma be, havli of their present greatest diameter. The pipe 31 is coupled to a pipe 40 (see Fig. 2) of the air-brake system of a railroad-train or other system, preferably at a point between the usual valve 41, controlled by the I lever 42 and the air-reservoiron the engine,

are seated.

v'and the sprin 21 is so adjusted that a pressure of, say, ty or sixty pounds will compress it and force the piston 20 to the limit of its, forward stroke and move the piston-rod vuntil the weighted ends of the valves ass downwardly off the cam 23 and the va ves In the operation..` of the device as indicated by the positionof the triple.l cock in Fig. 3 the v pistn-cylinder is in open communication' with the steam-pi e 32 and supposedly with the boilerthroug the opening of the valve 33, with the result that if the pressure in the steam-boiler is above sixty or seventy poundspressure, or whatever pressure the spring 21 is adjusted to, such spring is compressed and the piston and its rod 19 are at the limit of their forward stroke and the valves 10 of the cylinder-cock seated; but if while in this position the steam-pressure in the boiler is reduced below that for which the spring 21 is set the spring will then expand and force the piston 20 and its rod 19 to the limit of their backward strokes, with the result that the valves 10, through their rods 12 and weights `15 and the cams 23 on the piston-rod, will be forced upwardly off their seats, and thereupon water in the cylinder will be discharged throu h the cylinder-cocks and downwardly from t eir discharge-o enings 14, and said valves will not again seat until the'piston is subjected to a steam or other pressure above that for which the spring is set. When, however, there is the continuous higher pressure in the boiler and it is desirable to i the meantime unseat the valves and discharge water from the cylinder, the plug 30 of the three-way cock is turned in the direction indicated by the arrow in Fig. 3-that is to say, until the way 35 has passed beyond register with the steain-pipe 32 and the ways 36 and 37 are respectively in register with the pipes 27 and 34, whereupon the steam in the cylinder 18 will discharge through the ways 36 and 37 andl thence outwardly into the air through the pipe 34. Preferably, however, the i8- ton 20, its spring 21, and rod 19 are pre cr- Yxoc -and t e plug 30 of the three-way cock is turned in the opposite direction until the ways 36 and 37 are respectively in register with the pipes 31 and 27. If while in .the above position the air-pressure in the enginereservoir. or from any source is above that for which the spring 21 is adjusted, tlie spring will befcoinpressed and the piston an'd piston-rod will be at the limit of their forward stroke and the valves of the cylindercocks seated and remain .seated until the hacppening of one of two things-`namely, a re uction in pressure in the air-reservoir below that resisted by the spring or the turning ofthe plug 30 of the three-way cock until the ways 36 and 37 are respectively in register with the pipes 27 and 34, and whereupon and on the escapeof the air from the cylinder out reservoir is `reduced below the minimum pressure it is designed to have the valves will not only be automatically actuated, but the discharge from the cylinder-cock will serve.

as a signal notifying the engineer that his pressure is too low. Again, if the pipe connecting the air-pump with the main reservoir becomes gummed up and thepum is yro ' in the cylinders 3 5 vand thereby working hard, the engineer will be Warne by the discharge from the cylinder-cock that he is not getting kthe proper pressure and that his pum is working a' ainst itsl own pressure' and per aps running ot and burn1ng.\ In event the' locomotive should lose its air in the main reservoir lthe engineel; will likewise be warned that his air is gone, assumin that 'the gage registers properly, but in rea ity is stuck and needs testmg.

When steam to the exclusion of air is emloyed for actuating the cylinder-cocks, as before described, both cylinders should be connected by a steam-pipe withthe boiler and, as may be, by'a branch (not shown) extending from pipe 27, Fig. 2, to the cylinder on the opposite side of the engine. When using steam, the reductionor cutting oli the Steam-pressure'operates precisely the same as' the air to automatically open the cylindercocks. It is therefore'obvious'that assoon as a locomotive is run into a lroundhouse the pressure is released from back of the piston in the cylinder-cock,` the valves of the cylinder-cocks willl be o en, and any condensation lbedischarged therefrom, revent the freezing up and Furtherbreakin of t e steam-cylinder.

.t more, W t en the air-pressure is belowa certain oint`say sixty or seventy poundsthe cyl-l mder-cocks will be open, with the result that 'the engine will be revented 'from .running away incase of a lea" throttle. i

Aside from the use .of the three-way cock the operation ofthe cylinden-cocks to their I pistonnecessitates the'employment'of butla from the cylinder-cock to s" le i e tegengie-cab an connected with the mainreservoir pressure'at thebrake-valve and providing said pipe with a cock o'r valve, so.

that it maybe cut in or out, as voccasion requires.

My improved cylinder-cock may also be opi piston, a piston-rod, cam-surfaces on said rod l directly engaging said valves, and a spring actuating aid piston-rod in one direction, substantia ly as described.

2. A cylinder-,cock structure comprising in combination weighted valves seating| by gravity, a cylinder, a piston and a piston-rod providedwith cam-surfaces and adapted to actuate said valves off and ontheir seats, a

pipe connection therefor with steam' and air pipes and a three-way cock controlling the supply of air or steam" to said cylinder and their discharge therefrom, substantially as described.

3. *A cylinder-cock structure comprising in combination weighted valves seating gravity, a cylinder, a iston-rod provided with cam-surfaces direct y engaging and actuating said valves, a spring actuatingI said rod in one direction, a thfree-wa coc a pi e connection between said coc land cylin er and means for su plyingsteam or air alternately to `said cociir and whereby the supply to and discharge from thecylinder may be controlledand regulated, substantially as described,- f

l '-ARLH. oBER'roP.

Witnesses: JNO. G. ELLIo'r'r,f '.M. REEDEB. l

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