Patent US3822086A successfully refreshed from Google Patents.
US3822086A
Expired / Lapsed
US
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Apparatus for recharging a tr tube
Assignee: United States Department of the Navy
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Filing: 1973-02-01
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Granted: 1974-07-02
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Expires: 1993-02-01
Abstract
Abstract A hydrogen gas reservoir outside main discharging chamber of a transmitter-receiver tube is allowed to leak hydrogen at a controlled rate through a palladium window in the envelope of the TR tube. An automatic pressure controlling unit is provided which comprises an electrical bridge circuit with a pressure sensing element in one arm of the bridge. An imbalance in the bridge circuit turns on a heater which raises the temperature of the palladium window which in turn lets hydrogen from the reservoir pass through it to recharge the TR tube.
Inventors
- 👤 S Paik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:26
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/02; H01J17/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
90 words
An apparatus for recharging a TR tube having an envelope, comprising: a pressure sensor housed inside the TR tube envelope; a hydrogen-absorbing window forming a part of the wall of said TR tube; a hydrogen gas reservoir located external of said TR tube envelope and in communication with said window; a heater element mounted in said reservoir adjacent said hydrogen-absorbing window of said TR tube; and means for energizing said heater element in response to loss of hydrogen gas pressure inside said TR tube as indicated by said pressure sensor.
Claim 2
Independent Claim
90 words
An apparatus for recharging a TR tube having an envelope, comprising: a pressure sensor housed inside the TR tube envelope; a hydrogen-absorbing window forming a part of the wall of said TR tube; a hydrogen gas reservoir located external of said TR tube envelope and in communication with said window; a heater element mounted in said reservoir adjacent said hydrogen-absorbing window of said TR tube; and means for energizing said heater element in response to loss of hydrogen gas pressure inside said TR tube as indicated by said pressure sensor.
Claim 3
Dependent Claim
16 words
The apparatus of claim 1 wherein said pressure sensor is an electrical resistance dependent pressure sensor.
Claim 4
Dependent Claim
32 words
The apparatus of claim 2 wherein means for energizing said heater element comprises an electrical bridge circuit having said electrical resistance dependent pressure sensor as one of the arms of the bridge.
Claim 5
Dependent Claim
25 words
The apparatus of claim 3 wherein said electrical bridge further comprises a high gain D.C. amplifier for sensing the null condition of said electrical bridge.
Claim 6
Dependent Claim
15 words
The apparatus of claim 2 wherein said electrical resistance dependent pressure sensor is a thermistor.
Claim 7
Dependent Claim
20 words
The apparatus of claim 3 wherein said electrical bridge further comprises a low level sensor and a high level sensor.
Claim 8
Dependent Claim
21 words
The apparatus of claim 1 wHerein said hydrogen-absorbing window mounted in the envelope of said TR tube is a palladium window.
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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |