Patent US3611341A successfully refreshed from Google Patents.
US3611341A
Expired / Lapsed
US
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Pressure-magnetic detection system
Assignee: Individual
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Filing: 1968-09-17
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Granted: 1971-10-05
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Expires: 1988-09-17
Abstract
Abstract Detection system sensitive to both magnetic and pressure changes having a fluid filled hose integrated with an electrical conductor. The conductor can be either a single coiled wire, a wire mesh, or the fluid itself. Pressure changes are converted to electrical signals by a piezoelectric transducer.
Inventors
- 👤 David T Craig
- 👤 William F Gavin
- 👤 Robert B Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:01
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/22; G08B13/24; G08B13/2491; G08B13/2497; G08B13/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
92 words
A pressure-magnetic detection system comprising: a. a hose containing a fluid and an electrical conductor in the form of a wire mesh embedded within the hose; b. means for detecting magnetic changes of the electrical conductor; c. means for detecting pressure changes from disturbances in the fluid, the pressure detecting means including a piezoelectric transducer in contact with the fluid; and d. a logic module connected to the pressure and magnetic detecting means and providing an output upon coincidence of pressure and magnetic detection; e. an annunciator connected to the logic module.
Claim 2
Dependent Claim
92 words
A pressure-magnetic detection system comprising: a. a hose containing a fluid and an electrical conductor in the form of a wire mesh embedded within the hose; b. means for detecting magnetic changes of the electrical conductor; c. means for detecting pressure changes from disturbances in the fluid, the pressure detecting means including a piezoelectric transducer in contact with the fluid; and d. a logic module connected to the pressure and magnetic detecting means and providing an output upon coincidence of pressure and magnetic detection; e. an annunciator connected to the logic module.
Claim 3
Dependent Claim
102 words
A pressure-magnetic detection system comprising: a. a hose containing an electrical conductor in the form of a fluid; b. means for detecting pressure and magnetic changes of the electrical conducting fluid including a circular diaphragm mounted at one extreme of the hose in surface contact with the fluid and having an outer ring with an electrically conducting surface and a piezoelectric transducer mounted within the outer ring and insulated therefrom; and c. a logic module connnected to the pressure and magnetic detecting means and providing an output upon coincidence of pressure and magnetic detection; d. an annunciator connected to the logic module.
Claim 4
Dependent Claim
102 words
A pressure-magnetic detection system comprising: a. a hose containing an electrical conductor in the form of a fluid; b. means for detecting pressure and magnetic changes of the electrical conducting fluid including a circular diaphragm mounted at one extreme of the hose in surface contact with the fluid and having an outer ring with an electrically conducting surface and a piezoelectric transducer mounted within the outer ring and insulated therefrom; and c. a logic module connnected to the pressure and magnetic detecting means and providing an output upon coincidence of pressure and magnetic detection; d. an annunciator connected to the logic module.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |