US3667293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bimorph sensor for electrically measuring pressure changes
Assignee: Hercules LLC
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Filing: 1970-04-16
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Granted: 1972-06-06
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Expires: 1990-04-16
Abstract
Abstract A bimorph sensor for measuring pressure changes having a circular bimorph and a thin flexure comprising iron-nickel alloy supporting the circular bimorph at its circumference and said flexure having its outer extremity adapted to support said bimorph in a pressure cell comprising iron-nickel alloy, whereby a high electrical output is obtained from the said bimorph in response to pressure being applied thereto.
Inventors
- 👤 Alvin G Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:11
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0041; G01L9/008; G01P; G01P3/00; G01P3/62
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
135 words
An instrument for electrically measuring rate of change of pressure comprising: a. a fluid pressure cell; b. bimorph sensing means mounted in said cell to provide a sealed reference pressure chamber on one side thereof and a variable fluid pressure chamber on the other side thereof, said variable fluid pressure chamber being in communication with a static pressure conduit, said bimorph sensing means adapted to produce an electrical output in response to pressure changes in said variable pressure chamber; c. a weight centrally affixed to one side of said bimorph sensing means to produce an electrical output therefrom in response to acceleration; d. a thin flexure member supporting said bimorph sensing means within said pressure cell; and e. means responsive to the electrical output produced for generating a signal having informational value based on acceleration.
Claim 2
Dependent Claim
135 words
An instrument for electrically measuring rate of change of pressure comprising: a. a fluid pressure cell; b. bimorph sensing means mounted in said cell to provide a sealed reference pressure chamber on one side thereof and a variable fluid pressure chamber on the other side thereof, said variable fluid pressure chamber being in communication with a static pressure conduit, said bimorph sensing means adapted to produce an electrical output in response to pressure changes in said variable pressure chamber; c. a weight centrally affixed to one side of said bimorph sensing means to produce an electrical output therefrom in response to acceleration; d. a thin flexure member supporting said bimorph sensing means within said pressure cell; and e. means responsive to the electrical output produced for generating a signal having informational value based on acceleration.
Claim 3
Dependent Claim
248 words
An instrument for electrically measuring rate of change of pressure comprising: a. a first fluid pressure cell; b. first bimorph sensing means mounted in said first pressure cell to provide a sealed reference pressure chamber on one side thereof and a variable fluid pressure chamber on the other side thereof, said variable fluid pressure chamber being in communication with a static pressure conduit, said first bimorph sensing means adapted to produce an electrical output in response to pressure changes in said variable pressure chamber; c. a first thin flexure member supporting said first bimorph sensing means within said first pressure cell; d. a second fluid pressure cell; e. second bimorph sensing means mounted in said second pressure cell to provide a first variable fluid pressure chamber on one side thereof and a second variable fluid pressure chamber on the other side thereof, said first variable fluid pressure chamber being in communication with the variable fluid pressure chamber of said first pressure cell, and said second variable fluid pressure chamber being in communication with a pitot pressure conduit, said second bimorph sensing means adapted to produce an electrical output in response to changes in pitot pressure; f. a second thin flexure member supporting said second bimorph sensing means in said second pressure cell; and g. generating means responsive to the electrical outputs of said first and second bimorph sensing means for combining said outputs and generating a signal having informational value based on rate of change of total energy.
Claim 4
Dependent Claim
248 words
An instrument for electrically measuring rate of change of pressure comprising: a. a first fluid pressure cell; b. first bimorph sensing means mounted in said first pressure cell to provide a sealed reference pressure chamber on one side thereof and a variable fluid pressure chamber on the other side thereof, said variable fluid pressure chamber being in communication with a static pressure conduit, said first bimorph sensing means adapted to produce an electrical output in response to pressure changes in said variable pressure chamber; c. a first thin flexure member supporting said first bimorph sensing means within said first pressure cell; d. a second fluid pressure cell; e. second bimorph sensing means mounted in said second pressure cell to provide a first variable fluid pressure chamber on one side thereof and a second variable fluid pressure chamber on the other side thereof, said first variable fluid pressure chamber being in communication with the variable fluid pressure chamber of said first pressure cell, and said second variable fluid pressure chamber being in communication with a pitot pressure conduit, said second bimorph sensing means adapted to produce an electrical output in response to changes in pitot pressure; f. a second thin flexure member supporting said second bimorph sensing means in said second pressure cell; and g. generating means responsive to the electrical outputs of said first and second bimorph sensing means for combining said outputs and generating a signal having informational value based on rate of change of total energy.
References Cited (Backward Citations)
US2369788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |