Patent US3602254A successfully refreshed from Google Patents.
US3602254A
Expired / Lapsed
US
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Valve position indicating system
Assignee: Henry Pratt Co LLC
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Filing: 1970-01-30
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Granted: 1971-08-31
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Expires: 1990-01-30
Abstract
Abstract A valve position indicator particularly suited for use with valves having a first shaft driven by an operator and a second stub shaft for journaling the valve member. A piece of magnetically conductive material is imbedded in an end of the stub shaft which protrudes from the valve casing and which is received in a housing formed in part of magnetically conductive material. Within the housing is a pair of magnetic pole pieces each having an electrical winding associated therewith. One of the windings is connected to AC power while the other may be connected to a meter so that, dependent upon the position of the magnetically conductive material imbedded in the stub shaft and thus the position of the valve, a greater or a lesser amount of current will be induced in the second winding with the amount of current induced in the second winding being indicative of the valve position.
Inventors
- 👤 Donald G Fawkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:12
CPC Classifications
F; F16; F16K; F16K37/00; F16K37/0025; F16K37/0041; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8225; Y10T137/8242
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
117 words
A valve position indicating system comprising: a valve casing; a valve member rotatable within said casing between open and closed positions; means mounting said valve member for rotation within said casing and including a first shaft secured to said valve member and having valve operating means associated therewith, and a second shaft secured to said valve member and movable therewith; electromagnetic means including a first element secured to said second shaft to be movable with the same and said valve member, and a second element stationarily secured to said casing, said electromagnetic means providing a signal whose magnitude is dependent upon the relative positions of said first and second elements; and indicating means responsive to said signal.
Claim 2
Dependent Claim
117 words
A valve position indicating system comprising: a valve casing; a valve member rotatable within said casing between open and closed positions; means mounting said valve member for rotation within said casing and including a first shaft secured to said valve member and having valve operating means associated therewith, and a second shaft secured to said valve member and movable therewith; electromagnetic means including a first element secured to said second shaft to be movable with the same and said valve member, and a second element stationarily secured to said casing, said electromagnetic means providing a signal whose magnitude is dependent upon the relative positions of said first and second elements; and indicating means responsive to said signal.
Claim 3
Dependent Claim
20 words
A valve position indicating system according to claim 1 wherein said electromagnetic means are located externally of said valve casing.
Claim 4
Dependent Claim
75 words
A valve position indicating system according to claim 1 wherein said first element comprises a piece of magnetically conducting material imbedded in an end of said second shaft; and said second element comprises a housing formed of a magnetically conducting material surrounding said second shaft end, magnetic pole means extending inwardly from said housing toward said second shaft end; and a pair of electrical windings, one on each of said inwardly extending magnetic pole mEans.
Claim 5
Dependent Claim
54 words
A valve position indicating system according to claim 3 wherein each of said inwardly extending magnetic pole means comprises a generally T-shaped member, said housing includes opposed apertures in a side thereof each receiving the base of a corresponding T-shaped member, and said windings are wrapped about a corresponding one of said T-shaped members.
Claim 6
Dependent Claim
170 words
A valve position indicator for use with a valve having a nonmagnetically conducting shaft with a magnetically conducting material imbedded therein and movable with a valve member comprising a generally closed housing formed at least in part of a magnetically conducting material and having at least one opening therein for receiving said valve shaft; means on said housing for securing said housing to a valve casing; a pair of magnetic pole elements within said housing in magnetically conducting relation with the magnetically conducting portion of said housing and adapted to form a magnetic flux path with said housing and the magnetically conducting material imbedded in the shaft; a primary winding operatively associated with one of said pole elements and adapted to be connected to a pulsating source of electrical power; and a secondary winding operatively associated with the other of said pole elements and adapted to provide a signal whose magnitude is dependent upon the relative position of the magnetic material imbedded in the shaft within said magnetic flux path.
Claim 7
Dependent Claim
170 words
A valve position indicator for use with a valve having a nonmagnetically conducting shaft with a magnetically conducting material imbedded therein and movable with a valve member comprising a generally closed housing formed at least in part of a magnetically conducting material and having at least one opening therein for receiving said valve shaft; means on said housing for securing said housing to a valve casing; a pair of magnetic pole elements within said housing in magnetically conducting relation with the magnetically conducting portion of said housing and adapted to form a magnetic flux path with said housing and the magnetically conducting material imbedded in the shaft; a primary winding operatively associated with one of said pole elements and adapted to be connected to a pulsating source of electrical power; and a secondary winding operatively associated with the other of said pole elements and adapted to provide a signal whose magnitude is dependent upon the relative position of the magnetic material imbedded in the shaft within said magnetic flux path.
Claim 8
Dependent Claim
56 words
A valve position indicator according to claim 5 wherein each of said pole elements comprises a generally T-shaped member having its base removably secured to said housing and having the associated one of said primary and secondary windings wound about its midsection with the top thereof generally parallel to the axis of said shaft receiving opening.
Claim 9
Dependent Claim
117 words
A valve position indicating system comprising a valve casing; a valve member rotatable within said casing between open and closed positions; means mounting said valve member for rotation within said casing and including a shaft secured to said valve member to be movable therewith and having an end extending from said casing; electromagnetic means including a first element secured to said shaft end externally of said casing to be movable with said shaft and said valve member, and a second element stationarily secured to said casing at the exterior thereof, said electromagnetic means providing a signal whose magnitude is dependent upon the relative positions of said first and second elements; and indicating means responsive to said signal.
Claim 10
Dependent Claim
117 words
A valve position indicating system comprising a valve casing; a valve member rotatable within said casing between open and closed positions; means mounting said valve member for rotation within said casing and including a shaft secured to said valve member to be movable therewith and having an end extending from said casing; electromagnetic means including a first element secured to said shaft end externally of said casing to be movable with said shaft and said valve member, and a second element stationarily secured to said casing at the exterior thereof, said electromagnetic means providing a signal whose magnitude is dependent upon the relative positions of said first and second elements; and indicating means responsive to said signal.
Claim 11
Dependent Claim
51 words
A valve position indicator system according to claim 7 wherein said first element is formed of a magnetically conducting material; and said second element comprises magnetic conducting means arranged to define a magnetic flux path including said first element, and a pair of electrical windings magnetically associated with said flux path.
Claim 12
Dependent Claim
38 words
A valve position indicator system according to claim 8 wherein said mounting means further comprises an additional shaft secured to said valve member; and drive means for said additional shaft for moving the valve member within said casing.
Claim 13
Dependent Claim
41 words
A valve position indicator system according to claim 9 wherein said magnetic conducting means includes a housing formed of magnetic conducting material and containing said shaft end and said windings, said housing being secured to the exterior of said valve casing.
Claim 14
Dependent Claim
26 words
A valve position indicator system according to claim 8 wherein said magnetic conducting means are mounted for selective adjustable positioning with respect to said first element.
Claim 15
Dependent Claim
46 words
A valve position indicating system according to claim 7 wherein said first and second elements are arranged with respect to each other and with respect to said valve member so that maximum magnetic coupling will be obtained when said valve member is in said open position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |