US3572208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic annunciation system
Assignee: Honeywell Inc
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Filing: 1968-12-30
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Granted: 1971-03-23
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Expires: 1988-12-30
Abstract
Abstract A PNEUMATIC ANNUNCIATION SYSTEM THAT COMPARES A THEREMOSTATIC SIGNAL PRESSURE WITH PRE-SELECTED HIGH AND LOW REFERENCE PRESSURES AND ANNUNCIATES THE SURPASSING OF EITHER REFERENCE PRESSURE BY THE SIGNAL PRESSURE. THE REFERENCE PRESSURES ARE DERIVED FROM THE OUTPUT PRESSURE OF A PRESSURE REGULATING VALVE, WHICH ALSO SERVES AS A SETPOINT PRESSURE. THE SYSTEM IS ARRANGED SO THAT A PREDETERMINED INTERVAL IS MAINTAINED BETWEEN THE REFERENCE PRESSURES AND THE SETPOINT PRESSURE WHEN THE PRESSURE REGULATING VALVE IS ADJUSTED.
Inventors
- 👤 Richard C Mott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:27
CPC Classifications
D; D05; D05B; D05B27/00; D05B27/10; D05B27/18; D05B27/185; F; F15; F15B; F15B21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |