Patent US3229271A successfully refreshed from Google Patents.
US3229271A
Expired / Lapsed
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Icing indicator system
Assignee: Individual
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Filing: 1962-02-27
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Granted: 1966-01-11
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Expires: 1982-02-27
Abstract
No abstract record available.
Inventors
- 👤 Martin S Frant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:45
CPC Classifications
G; G08; G08B; G08B21/00; G01; G01W; G01W1/00; G01W1/14; G08B19/00; G08B19/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
AN ICING INDICATOR SYSTEM COMPRISING A THERMOELECTRIC COOLER HAVING A POLISHED MIRROR-LIKE SURFACE, A SOURCE OF LIGHT ADAPTED TO DIRECT A BEAM OF LIGHT THEREON AND A PHOTOCELL ACTIVATED BY THE REFLECTED LIGHT, A DIFFERENTIAL THERMOCOUPLE FORMING A JUNCTION CONTACT AT ONE END WITH SAID SURFACE AND HAVING ITS OTHER END EXPOSED TO THE ATMOSPHERE, A THERMOMETRIC SWITCH EXPOSED TO THE ATMOSPHERE, ACTUATABLE BELOW A PREDETERMINED TEMPERATURE AND CONNECTED INTO SAID THERMOCOUPLE, A VOLTAGE DETECTIN CIRCUIT ELECTRICALLY CONNECTED TO SAID THERMOCOUPLE, A RELAYOPERATED SWITCH CONNECTED TO SAID CIRCUIT AND TO A SOURCE OF POWER AND A WARNING SIGNAL ELECTRICALLY CONNECTED TO SAID RELAY-OPERATED SWITCH AND ACTUATED BY SAID SYSTEM WHEN SAID RELAY-OPERATED SWITCH AND SAID THERMOMETRIC SWITCH ARE CLOSE DUE TO EXISTING TEMPERATURE AND DEWPOINT CONDITIONS WHICH ARE CONDUCTIVE TO ICING.
Claim 2
Dependent Claim
131 words
AN ICING INDICATOR SYSTEM COMPRISING A THERMOELECTRIC COOLER HAVING A POLISHED MIRROR-LIKE SURFACE, A SOURCE OF LIGHT ADAPTED TO DIRECT A BEAM OF LIGHT THEREON AND A PHOTOCELL ACTIVATED BY THE REFLECTED LIGHT, A DIFFERENTIAL THERMOCOUPLE FORMING A JUNCTION CONTACT AT ONE END WITH SAID SURFACE AND HAVING ITS OTHER END EXPOSED TO THE ATMOSPHERE, A THERMOMETRIC SWITCH EXPOSED TO THE ATMOSPHERE, ACTUATABLE BELOW A PREDETERMINED TEMPERATURE AND CONNECTED INTO SAID THERMOCOUPLE, A VOLTAGE DETECTIN CIRCUIT ELECTRICALLY CONNECTED TO SAID THERMOCOUPLE, A RELAYOPERATED SWITCH CONNECTED TO SAID CIRCUIT AND TO A SOURCE OF POWER AND A WARNING SIGNAL ELECTRICALLY CONNECTED TO SAID RELAY-OPERATED SWITCH AND ACTUATED BY SAID SYSTEM WHEN SAID RELAY-OPERATED SWITCH AND SAID THERMOMETRIC SWITCH ARE CLOSE DUE TO EXISTING TEMPERATURE AND DEWPOINT CONDITIONS WHICH ARE CONDUCTIVE TO ICING.
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |