Patent US4012072A successfully refreshed from Google Patents.
US3198236A
Expired / Lapsed
US
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Flame detecting devices
Assignee: Honeywell Inc
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Filing: 1963-04-29
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Granted: 1965-08-03
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Expires: 1983-04-29
Abstract
No abstract record available.
Inventors
- 👤 Puech Fernand Alfred He Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:17
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/20; F23N5/02; F23N5/08; F23N5/085; F23N2239/00; F23N2239/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
CONTROL APPARATUS COMPRISING: FIRST RELAY MEANS INCLUDING ACTUATING MEANS CONSTRUCTED AND ARRANGED TO BE OPERATIVELY ENERGIZED ONLY BY D.C. VOLTAGE, SECOND RELAY MEANS HAVING ACTUATING MEANS, A SOURCE OF A.C. VOLTAGE, CIRCUIT MEANS CONNECTING THE ACTUATING MEANS OF SAID FIRST AND SECOND RELAY MEANS IN SERIES WITH SAID SOURCE OF A.C. VOLTAGE, SAID CIRCUIT MEANS BEING CONSTRUCTED AND ARRANGED TO APPLY A VOLTAGE HAVING A D.C. COMPONENT TO SAID FIRST AND SECOND RELAY MEANS TO THEREBY OPERATIVELY ENERGIZE THE ACTUATING MEANS OF BOTH OF SAID RELAY MEANS, PHOTOCONDUCTIVE MEANS HAVING A NORMALLY HIGH RESISTANCE AND A LOW RESISTANCE WHEN SUBJECTED TO LIGHT ENERGY, AND CIRCUIT MEANS CONNECTING SAID PHOTOCONDUCTIVE MEANS IN PARALLEL CIRCUIT TO THE ACTUATING MEANS OF SAID SECOND RELAY MEANS AND TO SAID SOURCE OF A.C. VOLTAGE WHEREBY THE PRESENCE OF LIGHT ENERGY IS EFFECTIVE TO APPLY A VOLTAGE TO SAID FIRST RELAY MEANS ACTUATING MEANS HAVING AN A.C. COMPONENT TO THEREBY OPERATIVELY DE-ENERGIZE THE ACTUATING MEANS OF SAID FIRST RELAY MEANS, THE ACTUATING MEANS OF SAID SECOND RELAY MEANS BEING OPERATIVELY DE-ENERGIZED ONLY IN THE EVENT THAT SAID PHOTOCONDUCTIVE MEANS EXPERIENCES AN ABNORMALLY LOW RESISTANCE.
Claim 2
Dependent Claim
188 words
CONTROL APPARATUS COMPRISING: FIRST RELAY MEANS INCLUDING ACTUATING MEANS CONSTRUCTED AND ARRANGED TO BE OPERATIVELY ENERGIZED ONLY BY D.C. VOLTAGE, SECOND RELAY MEANS HAVING ACTUATING MEANS, A SOURCE OF A.C. VOLTAGE, CIRCUIT MEANS CONNECTING THE ACTUATING MEANS OF SAID FIRST AND SECOND RELAY MEANS IN SERIES WITH SAID SOURCE OF A.C. VOLTAGE, SAID CIRCUIT MEANS BEING CONSTRUCTED AND ARRANGED TO APPLY A VOLTAGE HAVING A D.C. COMPONENT TO SAID FIRST AND SECOND RELAY MEANS TO THEREBY OPERATIVELY ENERGIZE THE ACTUATING MEANS OF BOTH OF SAID RELAY MEANS, PHOTOCONDUCTIVE MEANS HAVING A NORMALLY HIGH RESISTANCE AND A LOW RESISTANCE WHEN SUBJECTED TO LIGHT ENERGY, AND CIRCUIT MEANS CONNECTING SAID PHOTOCONDUCTIVE MEANS IN PARALLEL CIRCUIT TO THE ACTUATING MEANS OF SAID SECOND RELAY MEANS AND TO SAID SOURCE OF A.C. VOLTAGE WHEREBY THE PRESENCE OF LIGHT ENERGY IS EFFECTIVE TO APPLY A VOLTAGE TO SAID FIRST RELAY MEANS ACTUATING MEANS HAVING AN A.C. COMPONENT TO THEREBY OPERATIVELY DE-ENERGIZE THE ACTUATING MEANS OF SAID FIRST RELAY MEANS, THE ACTUATING MEANS OF SAID SECOND RELAY MEANS BEING OPERATIVELY DE-ENERGIZED ONLY IN THE EVENT THAT SAID PHOTOCONDUCTIVE MEANS EXPERIENCES AN ABNORMALLY LOW RESISTANCE.
References Cited (Backward Citations)
FR1262006A
Cited
US3079982A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |