US629086A

US629086A - Straightway valve.

Info

Publication number: US629086A
Application number: US67099698A
Authority: US
Inventors: Henry A Mcgrory
Original assignee: Individual
Current assignee: Individual
Priority date: 1898-02-21
Filing date: 1898-02-21
Publication date: 1899-07-18
Anticipated expiration: 1916-07-18

Description

- (Appliution 211 Feb 91, 18

(In Modem VENTOR.

WITNESSES.

WJM

.dttorneys UNITED STATES" P TENT GFFICE.

HENRY A. MOGRORY, OF DETROIT, MICHIGAN.

'STRAIGHTWAY valve. i

ammonia: formingpart or Letters" Pat nt no. 629,086, dated m 18, 1899. Application filed February 21, 1893- Seiidl No; 670,996. (No model) or ings, and to the letters of reference, marked thereon ,which form a part of this specification.

This invention relatesto straightway plugvalves; and it consists in the construction and arrangement of parts ,hereinafter fully set forth, and pointed out particularly in the claims. 1

The objects of the invention are to produce a quick-openin g straightway plug-valve in which the arrangements are such as to provide for quickly raising the valve from its seat before being turned in the operation of opening and closing the valve to obviate the cutting of the valve in its seat; to provide for accelerating the vertical movement of the valye, so that it may be seated or withdrawn from its seat with but a comparatively slight movement of the operating hand-wheel; to provide for arresting the valve, so as to bring the opening therethroughinto true alinement with the ports of the valve-case when open and to properly cover said ports with the solid side of the valve when closed; to provide a valve-seat comprising a narrow raised surface only around the port-openings either upon the valve orthe valve-case, so as to leave the greater portion of the surface of the valve free from the wall of the case, obviating the accumulation of dirt upon the valve-seat, so as to preventthe properseating ofthe valve, and to provide for eifecting aclosure around the valve-stem when the valve is raised independent of the stufing-box. These objects are attained by'the mechanism illustrated in the accompanying drawings, in which- Figure 1 is an elevation of my improved valve construction. Fig. 2 is a vertical central section therethrough. Fig. 3 is a vertical and horizontal section as on line'3 3 of Fig. 1. Fig. 4 is a transverse section through the valve-case, showing the plug-valve removed. I I I I Referring to the letters of reference, Adesi gnates the valve-case,which is a hollow globular body provided .with the opposed ports B. Aroundthe inner opening of these ports is a raised surface a, which comprises the valveseat and conforms to the contourof the valve. These raised surfaces at around the ports in the valve-case stand away from the inner wall oi the case, so that the plug-valve O has bearing upon said raised surfaces only, the body of the valve being free from the walls of the case, forming an open space 17 between the case and valve on the sides, as clearly shown in Fig. 3, which space I) communicates with the recess b in the base of the valve-case below the bottom ofthe valve.

The valve 0 comprises a tapering hollow shell having a solid top and bottom and provided with the openings d'through the opposedsides thereof, which are adapted when the valve isopen to register with the ports B in the valve case.

The valve 0 is provided with an integral stem D,which passes upward through the cap Eof the valve-case and carries at its upper end a cross-arm F, through the medium of which said stem may be turned to operate the valve.

The cap E of the valve-case is provided with a vertical stem G, through which the valve-stempasses and which throughout its length is externally screw-threaded. Upon the upper end of said stem G is the cap H of the stoning-box, through-which the valvestem also passes and which confines a suitable packing 0 around said valve-stem.

The upper end of the valve-stem D below the cross-arm F is provided with a left-hand screw-thread 2, whereby the upper end of said stem is adapted to screw through the tappethub f of the hand-wheel I, accomplishing the attachment of said hand-wheel to said valve-stem, but rendering said wheel rotarily movable thereon. Depending from said handwheel are the curvedarms J, which are united at their lower ends to a cross-piece or enlarged boss K, which is provided with a central tapped aperture, whereby said boss is adapt-' ed to screw over the right-hand screw-threads g of the stem G of the cap E, forming of said arms a yoke which is screw-threaded to said stem G and adapted to turn thereon.

By reason of the fact that the yoke of the ban d-wheel engages a ri ght-h and sore w-thread on the cap-stem G and the hub of the handwheel I engages a left-hand thread on the valvestem a rotation of said hand -wheel in either direction will cause said threaded parts to act in unison to raise or lower the valve, thereby requiring but a comparatively slight movement of the hand-wheel to raise the valve from its seat or to again seat the valve after a movement thereof.

It will now be understood that when the valve is closed and it is desired to seat the plug to make the-closu re tight thehand-wheel I is turned to the right to screw its yoke downward upon the stem of the cap, whereby a downward draft is exerted upon the valve stem through the engagement of a hand-wheel therewith. At the same time the turning of said hand-wheel to the right will cause said stem to screw downward therethrough because of the left-hand thread thereon, whereby the downward movement which is imparted to the valve by a given rotation with the hand-Wheel is multiplied by two, requiring but a slight movement of said wheel to firmly seat the valve.

To raise the plug from its seat before opening the valve, the hand-wheel is turned to the left, whereby the yoke is screwed upward upon the stem of the cap and the valve-stem is screwed upward through the hub of the hand-wheel, multiplying by two the upward movement of the valve for a given turn of said wheel. As it requires but a slight movement vertically of thevalve to seat it or free it from its seat a fraction of a turn of the hand-wheel in either direction with the arrangement shown will be sufficient to release or seat the valve, reducing the time required for its operation to the minimum. Upon the release of the plug-valve from its seat it is turned by means of the cross-arm F to cause the apertures d to register with the ports B of the valve-case, when it may be seated to retain it in said position. In closing the valve it is turned by means of said cross-arm until its solid sides stand over the ports B of the case, as shown in Fig. 2, when it is again seated to make the closure tight. The arrangement is such that about one-half of a turn of the hand-wheel is sufficient in opening the valve to raise said valve from its seat, when one-quarter of a turn of the cross-arm F will swing the openings in the valve so as to register with the ports in the valve-case, thus enabling the valve to be opened to its full area with less that what would be the equivalent of one turn of the hand-wheel of the ordinary globe-valve.

By reason of the fact that the valve is raised from its seat before it is turned no cutting of the valve in its seat is possible, as said valve in moving in its rotation is perfectly free from the valve-seat, thereby obviating any wear on the parts.

XV hen the valve shall have been raised sufficiently high to free itself from its seat, the beveled shoulder h at the base of the valve stem is caused to engage a seat 7 formed in the depending boss L of the cap which surrounds the valve-stem, thereby effecting a closure around said stem when the valve is open, permitting the stem to be packed at 0 without the escape of steam or other fluid.

To provide for arresting the plug-valve C in its rotation, so as to bring the aperture (1 therethrough into proper alinement with the ports of the valve-case when open and to cause the solid sides of said valve to properly cover'the inner openings of said ports when the valve is closed, suitable stop-pins o are seated in the bottom of the valve-case, be tween which a third pin 0, depending from the bottom of the valve, is adapted to reciprocate, the location of said stop-pins being such that the valve is properly limited in its rotary movement in both directions, as will be well understood, thus providing simple and efficient means for arresting said valve at the proper point inits reciprocation.

By providing a raised valve-seat at around the inner opening of the ports of the valvecase a valve-seat is produced which embraces but a small area of the surface of the valve, obviating the possibility of an accumulation of dirt interfering with'the propel-seating of the valve and causing any dirt which might be present upon the valve-seat to be swept therefrom into the spaces b on either side by the rotary movement of the valve.

Vhile I have shown the raised seats a as surrounding the aperture of the ports of the valve-case, it is evident that said raised seats may be placed upon the exterior of the valve around the openings therethrough and accomplish the same result without departing from the spirit of my invention.

Having thus fully set forth my invention, what I claim as new,'and desire to secure by Letters Patent, is-

1. In a straightway valve, the combination of the valve-case having a straight way therethrough, a plug-valve seated in said case, the valve-stem integral with the valve carrying a cross-arm at its upper end, a hand-wheel attached to said valve-stem and adapted to turn thereon, a fixed member mounted centrally on the valve-case and externally threaded, and a swinging yoke comprising the arms J and connecting-boss K depending from said hand-wheel and screwing onto said fixed threaded member of the valve-case.

2. In a straightway valve, the combination of the valve-case, the plug-valve seated therein, the cap of said valve-case having an externally-threaded stem, the stem of the valve passing through said stem of the cap and adapted to rotate and move vertically therein, the upper end of the valve-stem havinga left hand thread, the hand-wheel screwing onto said left-hand thread, the swinging yoke cornprising the arms, J and connecting-boss K depending from said hand-wheel and screwing onto the external thread of the cap-stem, and means for rotating the valve-stem. g

3. The combination of the valve-case, the

7 Valve therein,-the valve-stem passing through the case and having a left-hand screw-thread on its upper end, a stem projecting from the valve-case having a right-hand thread, the hand wheel 1 screwing onto the left hand threads of the valve-stem, a swinging yoke comprising the arms J and connecting-boss K depending fromsaid hand-wheel and eneaos V 3 adapted to nioye yerticaHy, the Valve-stem integral with the valve, carrying an external thread at its upper end, a hand-wheel screwed onto the threads at the upper end of the valvestem, afixed annular member mounted centrally on the valve-case, a yoke depending from the hand-Wheel comprising the opposed arms and connecting boss, the connectingboss of said yoke being attached to and adapted to turn upon the fixed annular member of the valve-case. I,

In testimony whereof I sign this specification in the presence at two Witnesses.

HENRY A. MOGRORY. Witnesses E. 0. WHEELER, 1

SJ WHEELER.