Patent US2167460A successfully refreshed from Google Patents.
US3807232A
Expired / Lapsed
US
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Explosion proof gauge transducer
Assignee: Dresser Industries Inc
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Filing: 1972-08-23
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Granted: 1974-04-30
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Expires: 1992-08-23
Abstract
Abstract An encapsulated, self-contained gauge transducer to provide output information from a variable pressure source to a variety of output devices such as an indicating gauge. A housing contains a Bourdon tube sealed at both ends and surrounded by a fluid fill of incompressible liquid. Pressure variations from a source are communicated via a diaphragm in the housing wall through the liquid fill to be exerted externally against the Bourdon tube. A magnet is operably connected to the free end of the Bourdon tube for rotational displacement therewith in response to tube deflections imposed by pressure change.
Inventors
- 👤 R Wetterhorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:41
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/06; G01L19/0627; G01L19/0645; G01L19/0618; G01L19/08; G01L7/00; G01L7/02; G01L7/04; G01L7/043
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
180 words
An explosion proof gauge transducer comprising in combination: a. a substantially encapsulating housing; b. a Bourdon tube within said housing, said Bourdon tube being sealed at both its ends including a first end fixedly secured against movement and a second end free for deflection movement in response to pressure changes to which it is externally exposed; c. magnet means operably connected to said second tube end for displacement in correlation with the deflection movement thereof; d. an incompressible fluid fill within said housing in surrounding relation to said Bourdon tube; e. diaphragm means exposed on one surface to said fluid fill and adapted for exposure of another surface to a connected pressure source to communicate pressure changes from said pressure source through said fluid to externally against said Bourdon tube; and f. overload protection means for protecting said Bourdon tube and said diaphragm means against the effects of a predetermined overpressure applied by said pressure source, said protection means comprising deflection limiting means imposed on said Bourdon tube for limiting deflection response thereof to a predetermined value of increasing pressure.
Claim 2
Dependent Claim
180 words
An explosion proof gauge transducer comprising in combination: a. a substantially encapsulating housing; b. a Bourdon tube within said housing, said Bourdon tube being sealed at both its ends including a first end fixedly secured against movement and a second end free for deflection movement in response to pressure changes to which it is externally exposed; c. magnet means operably connected to said second tube end for displacement in correlation with the deflection movement thereof; d. an incompressible fluid fill within said housing in surrounding relation to said Bourdon tube; e. diaphragm means exposed on one surface to said fluid fill and adapted for exposure of another surface to a connected pressure source to communicate pressure changes from said pressure source through said fluid to externally against said Bourdon tube; and f. overload protection means for protecting said Bourdon tube and said diaphragm means against the effects of a predetermined overpressure applied by said pressure source, said protection means comprising deflection limiting means imposed on said Bourdon tube for limiting deflection response thereof to a predetermined value of increasing pressure.
Claim 3
Dependent Claim
13 words
A transducer according to claim 1 in which said Bourdon tube is C-type.
Claim 4
Dependent Claim
16 words
A transducer according to claim 1 in which said Bourdon tube extends helically within said housing.
Claim 5
Dependent Claim
66 words
A transducer according to claim 3 in which said protection means includes an annular collar extending inwardly of said housing and the Bourdon tube at said first end is fixed secured to said collar to be coaxially positioned thereon, said collar being of diameter corresponding substantially to the internal diameter of the tube when exposed to the maximum pressurE at which it is intended to operate.
Claim 6
Dependent Claim
46 words
A transducer according to claim 4 in which said collar extends linearly through the coil of said Bourdon tube for at least a substantial portion of its coil length to support said tube against diametral contraction when subject to a predetermined overpressure exceeding said maximum pressure.
Claim 7
Dependent Claim
26 words
A transducer according to claim 1 including accommodating means adapted to receive a magnetically actuated intelligence readout unit in magnetically coupled relation with said magnet means.
Claim 8
Dependent Claim
19 words
A transducer according to claim 6 in which said accommodating means provides for detachable receipt of said readout unit.
Claim 9
Dependent Claim
46 words
A transducer according to claim 1 in which said housing is of jointless one piece solid stock of tubular section having rupture characteristics substantially comparable to the system with which it is to be used, and having an open end in which to support said diaphragm.
Claim 10
Dependent Claim
38 words
A transducer according to claim 8 including a perforated disc member intermediate said diaphragm and the fluid fill in said housing and an annular ring securing said diaphragm against said disc in the open end of said housing.
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) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |