US794014A

US794014A - Stop-valve.

Info

Publication number: US794014A
Authority: US
Inventors: Joseph Hopkinson; Richard Kilburn
Original assignee: HOPKINSON AND Co Ltd J
Current assignee: J HOPKINSON AND Co Ltd; HOPKINSON AND Co Ltd J
Priority date: 1904-12-27
Filing date: 1904-12-27
Publication date: 1905-07-04
Anticipated expiration: 1922-07-04

Description

No. 794,014. PATENTED JULY 1905. J HUPKINWN 3; R. KILBURNQ STOP VALVE] APPLIUATION FILED 1220.27. 1904.

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MI I a% No. 794,014. IPATENTBD JULY 4. 1905. J. HOPKINSON & R. KILBURN.

STOP VALVE APPLICATION FILED DBO. 27, 1904.

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SPECIFICATION formingpart of Letters Patent l lo. 794,014t, dated, July 4:, 1905.

Application filed December 2'7, 1904. Serial No. 288,456.

Be it known that we, ,losnru l'llIHKlNSON and ltlcuano li iiin'nnn, subjects ol the King of (treat .liritain, residing at lrludderslield, lflnglalul, have invented certain no and uselnl lmprovcmcnts in thaw-Valves, ol which the Following is a s ecilication,

ln the specification of application tierial No. 2.l8,'l-ll we describe an invention applicable to screw-down stop-valves of the mushroom type lor steam and other ll uids wherein two valves are used working in opposite directions and arranged on opposite sides of a seating lloor or partition. Said valves are cmjinected together through their actuating mechanism and are arranged to close onto the seating-floor from opposite sides thereof and to nip said floor when closed without straining the valve-casing or bringing onesided pressure to hear on the seating-floor by the closing means. ln carrying out that invention we employed for one ol the valves a tubular spindle connected to a bridge having a limited movementon lixed guides, the spindle ol' the other valve being arranged to pass through the aforesaid tubular spindle and beillg connected to the bridge by a screwtln-eallcd sleeve. ln this construction, therel'ore, the connections are concentric.

Now according to the present invcntioi'l we GI'l'lplO V the same arrange:ncnt of valves for nippiiig the seating-lloor, but we dispense with the concentric arrznigmnent ol spindles, and in lieu thereol we pass the val vcspindlcs out in opposite directions through lids on opposite sides ol the casing, so that no spindle passes through the thoroughfare in the partition, as heretofore, and we actuate the spindles by connected gearing or by cm'inected levers or rods and screw mechanism.

Iln the accompanying ,drawings we have illustrated our improved valve in central Fig. 2 levers, and Fig. 3

ing a seat-Face on both sides thereol', and t, ll the two valves For closing the thorough- Iare through the partition. 'lhescvalvcs are inserted from opposite sides ol the valvecasing through openings which are closed by lids l l so that the spindle ol the lower 'alvedoes not pass through and partially obstruct the thoroughl'are, as it does in the arrangement described in the specification above relcrred to. The spindle c of the valve C passes through a slalllil'lg-box If in the lid ll], and the spindle (1 ol' the valve l) passes through a stnli'ing-boxf in the lid F. Both these stufling-boxes are accessible from the exterior and can be readily packed and adjusted when required.

la the arrangement shown in Fig. l the spindle 0 screws through a cross-bar (,1, carried by the lid l9, and the spindle screws through a cross-bar it, carried by the lid .l These cross-bars also form bearings lor the actuating-spindle ti, which is geared to the spindle c by gear-wlm-cls 'l I: and to the spindle (Z by gcar-wheels U 1/. The wheels 'l t a are lixed to their respective spindles; but the wl'lecl U has its bore screw-thrcadml and en gages with a screw-threaded part ol* the spindle s. V W are collars lived on the spindle l5 on opposite sides ol the wheel U, and Y is a. spring arranged between the collar V and the wheel U for a purpose hereinafter explained.

To open the valve, the llztl'nlkWlHfGl K is rotated connter-clockwise, when the upper or main valve C will be lil'tcd from its seat by the action of the upper pair of gear-wheels; but the lower valve will be kept to its seat by the steaul-pressure under it, and the wheel U will travel down the spindle s until it comes against and is locked by the lixed collar \V, whereupon lurthcr rotation ol the hand-wheel in the same direction will open the valve l). 'lo close the valve, the halal-wheel K, is rotated clockwise, when both valves U and I) will begin to close si1nultancously; but the valve l) will reach its seat while the valve U is still open equal to the hill area. Further rotation of the halal-wheel in the same direction willcause a spring-plunger Z to release the wheel U, and the latter will then travel up the spindle S while the valve G is completing its closing movement. hen the valve 0 reaches its seat, the wheel U at the same time engages with the spring Y, and any further movement of the hand-wheel will press the valves tightly on their seats.

In the arrangement shown in Fig. 2 the spindles 0 (Z are suitably connected, respectively, to the inner ends of levers G H, which are fulcrumed, respectively, at f/ b and the outer ends of said levers are connected together by a screw-threaded link or rod J, tur nished with a hand-wheel IQ for rotating it. As shown, the lever H carries a pivoted nut L, through which the screw-threads ol* the rod J are screwed, and the lever (i construeted to be engaged by collars jj on the rod J, so that the said rod can rotate without moving the lever Ur, but cannot move longitudinally without carryiijig the lever (i with it. On turning the rod J in the proper dircctiou the 'alve C on the outlet side of the partition will he opened first, the other valve remaining closed; hut when the valve U is fully opened and comes against the lid, which terms a stop therefor, then the continued rotation of the rod J in the same direction will cause the valve 1 to open in the opposite direction to the valve (1. Similarly the rotation of the rod J in the other direction will first close the valve 1) and then the valve C. Instead of utilizing the lid as a stop for the valve C an external step can he provided.

In the arrangement shown in Fig. 3 the spindle of the valve C is screw-threaded and screws through a cross-bar M, which is con nected. by links N N to a second cross-bar O, lixed on the spindle of the valve D. P 1 are guide-rods to prevent rotation of the crossbar M. On turning the spindle e the valve 0 is raised until it comes against the lid, and then continued rotation of the spindle 0 in the same direction causes the cross har M to move downward, and so open the valve l).

The reverse action takes place when closing the valve.

In all the above-described arrangements of valve both valves control the thoroughfare through the seating-floor, and if either valve is tight notwithstanding that the other may leak no steam or fluid can pass through the thoroughfare.

hat we claim is i. In a stop-valve, the combination, with a val ve-casin g, of a partition having a thorought'are therethrough, a seat-'t'ace on each side of said partition, a pair of valves for engaging with the said seat-faces, the spindles of said valves passing out of the valve-casing on opposite sides thereof, and means for connecting and actuating said alve-spindles.

2. in a stop-\ 'alvc, the combination, with a valve-casing, oia partition havi ng a thoroughfare theretln-ough, a seat-face on each side of said partition, a pair ol" valves for engaging with the said seat-faces, the spindles of said valves passing out oi the valve-casing on opposite sides thereof, a crossha r l\l screwthreaded on one of the val ve-spi ndles, a crossbar 0 iixed to the other valve-spimlle, and links N, N uniting said cross-bars M, O.

3. in a stop-valve, the comljiination, with a val ve-casing, of a partition having a thoroughfare therethrough, a seat-face on each side of said partition, a pair of valves for enga ing with the said seat-faces, the spindles ol said valves passing out of the val ve-casing on opposite sides thereof, a cross-har M screwthreaded on one of the val ve-spindles, a crossbar 0 fixed to the other valve-spindle, links N, N uniting said cross-bars M, O, and guides P, P for the cross-bar M.

in testimony whereof we have hereunto set our hands in presence of two subscribing witnesses.

JOSEPH HOPKINSON. RICHARD KILBUHN. Witnesses:

JOHN R. SUALAM, 'lnonms ll. H i'ns'r.