US154271A - Improvement in stop-valves - Google Patents

Improvement in stop-valves Download PDF

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US154271A
US154271A US154271DA US154271A US 154271 A US154271 A US 154271A US 154271D A US154271D A US 154271DA US 154271 A US154271 A US 154271A
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Prior art keywords
valve
plate
plates
valves
stop
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
    • F16K3/16—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together
    • F16K3/18—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together by movement of the closure members
    • F16K3/184—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together by movement of the closure members by means of cams
    • F16K3/186—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together by movement of the closure members by means of cams by means of cams of wedge from

Definitions

  • This invention consists in a novel construction and arrangement of the'two valveplates.
  • Figure y1 is a longitudinal central section Vof the valve, and Fig. 2 a side or edge view ot' the two valve-plates.
  • A represents the case or body of the valve
  • B the stem or spindle by which the valve-plates are moved
  • C and D the two valve-plates.
  • the body is constructed in the same general form as those now in use, with two valve-seats, c, which approachl each other toward the back or bottom of the case.
  • the valve-stem passes out through a stuffing-box in the end or extension of the case or body, and has its outer end provided with a handwheel, as usual.
  • the stem instead ot' having a singlethread cut upon it, as usual, has a lefthand thread cut upon one end, and
  • Fig. 1 One of these threads engages inthe neck ofthe case or body,.so that, as the stem is turned, it is moved endwise; while the other thread engages with the valve-plates, to move them lengthwise on the stem in the same direction that the latter is moving.
  • valve plates are moved at twice the spoed given them by a single thread, for the reason that, while they are carried along on the stem, the stem is also moved endwise in the same direction.
  • valve-plates C and D In my present valve, the only moving parts beside the screw are the two valve-plates C and D.
  • the former is provided on its back with a stud or block, c, having on its outsidev a spherical protuberance, d, to form a bearing for the other valve-plate, D, and having through its center a threaded hole to receive the screw-stem, as shown in Fig. 1.
  • the plate D isl ⁇ formed with an annular ange, e, on its back.
  • the plate C also has on its back, at the inner or lower side, two arms, g, and, at its upper edge, with a lip,
  • the plate D being mounted on the spherical bearing, is free to tip in any direction 5 while its ange c, being inside of the arms g and lip h, prevents it from sliding out of place.
  • the plates are carried inward, and forced tightly home between the two converging seats.
  • the plate C is carried directly by the screw, while the plate D is carried by the protnberance d and lip h.
  • valve-plate By passing the screw through the solid block on the valve-plate, the valve is rendered extremelysimple, cheap, andstrong, while at the saine time both plates are permitted to adapt themselves to their seats independently ot' each other.
  • the plate C having the block c, spherical protuberance d, arms g, and lip h, and the plate D, mounted on the protuberance, and having the annular ange c, as shown and described.

Description

` C. F'. M U R DUCK.
III
` WITNESSES- Stop-Valves. Y
Patented Aug. 18,1874.
HUH:
Jil/florney UNITED STATES PATENT OFFICE.
CHARLES F. MURDOCK, OF DETRCIT, MICHIGAN.
IM PROVEMENT IN STOP-VALVES.
Specification forming part of Letters Patent No. 154,271, dated August 18, 1874; application filed March 21, 1874.
To all whom it may concern:
Be it known that I, CHAnLEs F. MUE- DOCK, of Detroit, in the county ot' Wayne and State of Michigan, have invented certain Improvements in Stop-Valves, of which the following is a specification:
This invention consists in a novel construction and arrangement of the'two valveplates.
Figure y1 is a longitudinal central section Vof the valve, and Fig. 2 a side or edge view ot' the two valve-plates.
A represents the case or body of the valve; B, the stem or spindle by which the valve-plates are moved, and C and D the two valve-plates.
The body is constructed in the same general form as those now in use, with two valve-seats, c, which approachl each other toward the back or bottom of the case. The valve-stem passes out through a stuffing-box in the end or extension of the case or body, and has its outer end provided with a handwheel, as usual. The stem, instead ot' having a singlethread cut upon it, as usual, has a lefthand thread cut upon one end, and
a right-hand thread cut upon the other, as
shown in Fig. 1. One of these threads engages inthe neck ofthe case or body,.so that, as the stem is turned, it is moved endwise; while the other thread engages with the valve-plates, to move them lengthwise on the stem in the same direction that the latter is moving. Y
The' consequence of this arrangement is, that the valve plates are moved at twice the spoed given them by a single thread, for the reason that, while they are carried along on the stem, the stem is also moved endwise in the same direction. v
In my present valve, the only moving parts beside the screw are the two valve-plates C and D. The former is provided on its back with a stud or block, c, having on its outsidev a spherical protuberance, d, to form a bearing for the other valve-plate, D, and having through its center a threaded hole to receive the screw-stem, as shown in Fig. 1.
The plate D isl` formed with an annular ange, e, on its back. The plate C also has on its back, at the inner or lower side, two arms, g, and, at its upper edge, with a lip,
h, al1 of which extend down outside of the flange e, as shown in both gures.
The plate D, being mounted on the spherical bearing, is free to tip in any direction 5 while its ange c, being inside of the arms g and lip h, prevents it from sliding out of place.
`On turning the screw in the proper direction, the plates are carried inward, and forced tightly home between the two converging seats. The plate C is carried directly by the screw, while the plate D is carried by the protnberance d and lip h.
When the screw has its motion reversed, the plates are drawn back, and the valve opened, the plate D being held in position and aided in its movement by the arms g of plate C.
By having the spherical or ball-and-sock et joint between the plates they are both left free to adapt themselves to "their respective seats.
It will be seen that, as the plate C is mounted directly on the screw, a positive motion is imparted to it, so that there is no dauger of its being stopped or wedged fast by coming in contact with the slight obstructions which it will often meet.
By passing the screw through the solid block on the valve-plate, the valve is rendered extremelysimple, cheap, andstrong, while at the saine time both plates are permitted to adapt themselves to their seats independently ot' each other.
Having thus described my invention, what I claim is- 1. In combination with the valve-plate C, having the block or nut c and the spherical bearing d formed solidly on its back, the screw-stem B, passing through the block or nut, and the valve-plate D, mounted on the bearing, as shown.
2. In combination with the screw B, the plate C, having the block c, spherical protuberance d, arms g, and lip h, and the plate D, mounted on the protuberance, and having the annular ange c, as shown and described.
CHARLES F. MURDOCK.
Witnesses:
J. MCKENNEY, W. W. DODGE.
US154271D Improvement in stop-valves Expired - Lifetime US154271A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070194263A1 (en) * 2006-01-17 2007-08-23 Allegheny Coupling Company Valve arrangement
US20140103240A1 (en) * 2012-10-17 2014-04-17 Swagelok Company Actuator with dual drive

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070194263A1 (en) * 2006-01-17 2007-08-23 Allegheny Coupling Company Valve arrangement
US7578496B2 (en) * 2006-01-17 2009-08-25 Allegheny Valve And Coupling, Inc. Valve arrangement
US20140103240A1 (en) * 2012-10-17 2014-04-17 Swagelok Company Actuator with dual drive
US10690259B2 (en) 2012-10-17 2020-06-23 Swagelok Company Manually actuated valve with over-travel feature

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