Патент USA US2108228код для вставки
Feb. 15, 1938. ’ R A, LIGHT ET AL, ' - ‘ CYLINDER 2,108,228 COCK Filed Jan. 5, 1935 g. If F é- \F ‘ G INVENTORS. I qgjfwlpll f1 .Lig/J rfba'elvh 12/:Price rfn, M7 lrrromvzrl _ Patented Feb. 15, 1938 2,198,228 UNITED STATES PATENT GFFICE 2,108,228 CYLINDER COCK Ralph A. Light, Gynwyd, and Joseph W. Price, J12, Philadelphia, Pa, assignors to The United States Metaliic Packing Company, Philadel phia, Pa.,‘ a corporation of Pennsylvania Application January 3, 1935, Serial No. 244 1 Claim. (01. 121-434) Our invention relates to locomotive cylinder cocks of the type shown and described in the McLain Patent. 1,958,091, of May 8, 1934. In cylinder cocks of this kind, which are adapted to 5 be secured to the ends of locomotive cylinders, the casing of the cylinder cock which is in free communication with the locomotive cylinder is provided with closures through which is formed an outlet or exhaust port opened and closed by 10 the movement of the slide valve moving on a slide valve seat surrounding the exhaust port and ‘the valve is connected to and actuated by a piston reciprocable in a cylinder extending through the wall of the casing and connected at its outer end the closure in which the exhaust port is formed in such manner as to insure that the exhaust port shall be properly aligned with the valve actuating piston. In connection with our invention it is desirable to provide an improved construction by means of which the adjustment of a cap forming with the bottom of the closure an exhaust cham ber provided with a lateral outlet opening which can be angularly adjusted so as to direct this out let opening in what is considered the most advan- 10 tageous direction. With the above objects in view we form the exhaust port through the bottom closure of the cylinder cock casing with a relatively long and 15 to a source of ?uid pressure such as the boiler narrow cross-section and provide a slide valve 15 of the locomotive and the piston is moved in» to open and close the exhaust port of similar shape, though, of course, of such dimensions as to extend over the edges of the exhaust port when in position to close the port and we provide inter engaging means between the closure and the low- 20 ward to close the valve or outward to open it in accordance with the prevalence of the pressures acting upon the inner and outer ends of the pis 20 ton, the pressure on the'inner end of the piston being preferably supplemented by the resilient or portion of the cylinder cock casing) which ‘will pressure of a spring acting to move the piston insure that the closure when adjusted in closing ‘outward and shift the valve to opened position position with respect to the casing, will be so aligned that the longitudinal axis of the exhaust port will lie substantially at right angles to the 25 line of movement of the valve actuating piston. when ?uid pressure is cut off from the outer end 25 of the cylinder. The movements of the piston and connected parts are limited by abutments so located as to be contacted as the slide valve is closed or moved to fully open position. In the practical use of such valves it has been found that 30 the sensitiveness and e?iciency of the apparatus is at its best when the stroke of the actuating piston and the travel of the slide valve are short and also that the wear and tear on the moving parts is greater where the travel of these parts .35 is increased but it is important that a large ex haust port be provided to insure a prompt evacu ation of the cylinder cock and connected portion of the locomotive cylinder and it is vone object of our invention to provide a construction which. ‘10 will admit of the use of an exhaust port of ample cross-sectional area while at the same time con .?ning the motion of the moving parts of the ap paratus within limits which have been found to .give the best results with a minimum wear and 49 tear on the parts, particularly on the abutting surfaces which limit their movement. In apparatus of the kind to which our invention relates it has been found desirable to connect the exhaust port of the cylinder cock casing with an exhaust chamber provided with a lateral open ing which will direct the Water and steam issuing from the casing when the valve is opened in such direction as is found least objectionable and as in 55 our improved construction it is necessary to align By preference we form the closure with a cylin drical upper portion which ?ts in the lower end of the casing and We provide in the inside of the lower end of the casing a groove and on the cylin~ 30 drical portion of the closure a projection or pin adapted to enter this groove and thereby insure that the angular position of the closure shall be such that the long axis of the exhaust port will lie transversely to the line of motion of the valve 35 actuating piston. Below the cylindrical portion of the closure we form the closure with a laterally extending ?ange which ?ts against the bottom end of the cylinder cock casing and against the under side of this ?ange we ?t a peripheral flange 40 of a cap like member forming with the lower end of the closure, which is preferably hollowed out, an exhaust chamber and having a lateral open ing which by an angular adjustment of the cap piece can be made to direct the ?ow of water 45 and steam in any desired direction. By prefer~ once We secure the cap in position on the closure and the closure in position in and on the end of the casing by means of a union nut having a ?ange ?tting under the ?ange of the cap piece 50 and screwing upon the externally threaded lower end of the cylinder cock casing although it should be understood that we do not consider our inven tion in its broad sense as limited to any particu lar means for securing the parts together. 55 2 2,108,228 The apparatus and improved features which constitute our invention will be understood as further described in connection with the draw ing in which Figure 1 is a longitudinal section of the cylin der cock taken on the line 1-4 of Fig. 2, and Figure 2, a cross section taken on the line 2-2 of Fig. l. A indicates the casing of the cylinder cock 10 having at its top an internally threaded pro jection A1 adapted to be secured to a locomotive cylinder. The lower end of the casing which is of cylindrical shape is formed with an internal longitudinal groove indicated at B with a ma 15 chined end portion indicated at B1 and with an outer threaded portion indicated at 132. C in dicates a cylinder extending through the wall of the casing with an inner end opening into the casing and an outer end adapted to be connected to a source of ?uid pressure, preferably the boiler of the locomotive through a conduit, an end por tion of which is indicated at 01. D indicates a piston working in the cylinder‘ and having a piston rod extension from its inner end, indicated at D1, which piston rod extends across the cas ing A and is supported at its end as indicated at E and engaged by a spring E1 which applies constant resilient pressure, tending, through the piston rod, to force the piston D outward in its 3O cylinder C. D3 is an annular shoulder formed on the piston rod D, which, when the moving parts are actuated to close the valve G, abuts against a shoulder E‘2 on the guide E. The movement of the parts in the opposite direction to open the valve is limited by the abutment or the piston D against the outer end of the cylinder C. F indicates the bottom closure of the casing A which is preferably formed, as shown, with a cylindrical portion F1 adapted to fit in the cylin— drical end of the casing and terminating in a ?ange F2 adapted to ?t against the end B1 of the casing. A port F3 is formed through the closure which, in accordance with our present invention, is long and comparatively narrow and we provide on the outer cylindrical portion of the closure a pin or projection indicated at F4 which, when the closure is assembled with the casing, is adapted to‘ enter the groove B and so align the closure that its longitudinal port F3 will lie with its longer diameter at right angles to the line of travel of the piston D. The upper face F5 of the closure is machined so as to form a seat for a slide valve and the slide valve working on this seat, indi cated at G, is given a comparatively long and narrow form to correspond with the form of the port through the closure and is interengaged with the piston rod D1 as by means of projections G1 interengaging with shoulders D2 formed on the piston rod. A spring G2 interposed between the 60 top of the slide valve and the piston rod serves to press the valve against its seat. H is a cap having a peripheral ?ange H1 adapted to ?t against the ?ange F2 of the closure having a lat eral outlet opening indicated at H2. ~ J is a union nut having a ?ange J1 adapted to extend over the flange H1 of the cap and internally threaded to screw upon the threaded portion B2 of the cap piece as shown. In assembling the apparatus, the piston and iston rod extension D and D1 are inserted through the cylinder C, the slide valve inserted through the bottom opening of the casing and interengaged with the piston rod. The closure F is then inserted with its cylindrical portion Fl 75 extending into the bottom portion of the casing and its pin F4 inserted in the groove B, thus prop erly aligning the port F3 and the upper portion of the ?ange F2 resting on the end portion B1 of the casing. The cap piece H is then placed over the end of the closure with its flange H1 lying in in contact with the lower portion of the ?ange F2 and the cap piece having been angularly ad justed so that its lateral outlet H2 will lie in the desired direction, the union nut J is screwed upon the threaded end B2 of the casing until its ?ange 10 J1 is screwed down upon the ?ange H1 of the cap piece, clamping it against the ?ange F2 of the closure and clamping the ?ange F2 against the bottom of the casing. It will be understood that the casing A is in free communication with the end of the locomo tive cylinder and that when no pressure is ex erted against the outer end of the piston D, such pressure as may exist in the casing as well as the resilient action of the spring E1 acting on the 20 inner end of the piston will force it outward with the result that the slide valve G is shifted to a position to open the longitudinal port F3 and per mit any water and steam in the casing A to escape and that by a proper adjustment of the cap H such escaping ?uid may be given any di rection which is thought desirable‘. When high pressure fluid, such as steam from the boiler is admitted through the pipe C1 to the outer end of the cylinder C, the piston D is forced inward, shifting the slide valve G to a position to close the elongated port F3, thus preventing the escape of ?uid from the casing unless the pres sure inside of the casing and acting against the inner end of the piston D, shall temporarily ex ceed the pressure acting on the outer end of the piston as will be the case if condensed water from the engine cylinder shall ?ll the casing A and ac cumulate to some extent in the end of the loco motive cylinder. In such case the slide valve G 40 will be moved to open position, permitting the escape of accumulated water, after which escape pressure conditions will become such as to again close the exhaust slide valve G. It will be noted that by providing a relatively long and narrow exhaust port in the bottom clo sure with a correspondingly shaped slide valve to open and close the port that it is practicable to form an exhaust port or" large cross-sectional area which can be opened and closed by a rela tively short movement of the slide valve and a correspondingly short stroke inward or outward of the piston controlling the movements of the slide valve and it has been found that by so lim iting the movements of the moving parts that a material advantage is gained both in the opera tive functions of the apparatus and in the avoid ance of wear and tear on the moving parts par ticularly on the abutting surfaces which limit the movement of the parts to open and close the 60 valve. Again, it is thought desirable by users of cylinder cocks of the general character in ques tion to provide means for directing the exhaust in what is considered the least objectionable di rection and by providing an angularly adjustable 6-5 cap piece with a lateral outlet together with means, such as the union nut, for clamping the cap piece to the ?ange of the closure against the bottom of the casing. This requirement is very satisfactorily provided for. 70 Having now described our invention, what we claim as new and desire to secure by Letters Patent is: in a locomotive cylinder cock of the type com prising a casing, a separable closure for the lower 75 3 2,108,228 end of the casing having an exhaust port and a slide valve seat upon its upper surface, means for bottom closure as an elongated and comparatively narrow opening, forming the bottom closure and securely clamping the closure to the bottom of the lower end of the casing with interengaging the casing, a cylinder extending through the wall means whereby the bottom closure will be so of the casing and adapted to be connected to a aligned that the elongated exhaust port will be 5 source of‘ ?uid pressure at its outer end, a piston so disposed that its longer dimension will lie working in said cylinder and a slide valve con nected to be actuated by said piston and working transverse to the line of movement of the pis on the slide valve seat on the upper surface of 10 the bottom closure in which the movements of the piston and valve are limited :by abutments contacted at the end of each piston stroke to open or close the valve, the improvement which consists in forming the exhaust port through the ton and combining therewith a comparatively long and narrow slide valve adapted to open and close the exhaust port as the piston is actuated 10 in one direction or the other. RALPH A. LIGHT. JOSEPH W. PRICE, JR.