US3079982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burner control system
Assignee: White Rodgers Co
•
Filing: 1961-12-14
•
Granted: 1963-03-05
•
Expires: 1981-12-14
Abstract
No abstract record available.
Inventors
- 👤 Bernardus J Staring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:28
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/20; F23N5/02; F23N5/08; F23N5/085; F23N2227/00; F23N2227/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A FLAME RESPONSIVE ACTUATOR FOR A BURNER CONTROL SYSTEM INCLUDING A VOLTAGE DEPENDENT RESISTOR, AN ACTUATING RELAY HAVING A WINDING, A PHOTOCONDUCTIVE ELEMENT SHIELDED FROM AMBIENT LIGHT AND ARRANGED TO SEE BURNER FLAME WHEN IT EXISTS, A FIXED VALUE RESISTOR, AND A POWER SOURCE, CIRCUIT CONNECTIONS CONNECTING SAID FIXED RESISTOR, SAID VOLTAGE DEPENDENT RESISTOR, AND SAID RELAY WINDING IN SERIES RELATIONSHIP ACROSS SAID POWER SOURCE, AND CIRCUIT CONNECTIONS CONNECTING SAID PHOTOCONDUCTIVE ELEMENT IN PARALLEL WITH THAT PORTION OF SAID CIRCUIT CONNECTIONS INCLUDING SAID VOLTAGE DEPENDENT RESISTOR AND SAID RELAY WINDING ONLY, SAID VOLTAGE DEPENDENT RESISTOR HAVING SUFFICIENT CONDUCTANCE AT THE APPLIED VOLTAGE WHEN SAID PARALLEL CONNECTED PHOTOCONDUCTIVE ELEMENT IS NONCONDUCTIVE IN THE ABSENCE OF BURNER FLAME TO PERMIT OPERATIVE ENERGIZATION OF SAID RELAY WINDING, AND SAID PHOTOCONDUCTIVE ELEMENT BEING SUFFICIENTLY CONDUCTIVE WHEN BURNER FLAME EXISTS TO EFFECT A SUFFICIENT DROP IN THE APPLIED VOLTAGE ON SAID PARALLEL CONNECTED VOLTAGE DEPENDENT RESISTOR TO REDUCE ITS CONDUCTANCE TO THE POINT WHEREIN SAID RELAY WINDING IS NO LONGER OPERATIVELY ENERGIZED.
Claim 2
Dependent Claim
167 words
A FLAME RESPONSIVE ACTUATOR FOR A BURNER CONTROL SYSTEM INCLUDING A VOLTAGE DEPENDENT RESISTOR, AN ACTUATING RELAY HAVING A WINDING, A PHOTOCONDUCTIVE ELEMENT SHIELDED FROM AMBIENT LIGHT AND ARRANGED TO SEE BURNER FLAME WHEN IT EXISTS, A FIXED VALUE RESISTOR, AND A POWER SOURCE, CIRCUIT CONNECTIONS CONNECTING SAID FIXED RESISTOR, SAID VOLTAGE DEPENDENT RESISTOR, AND SAID RELAY WINDING IN SERIES RELATIONSHIP ACROSS SAID POWER SOURCE, AND CIRCUIT CONNECTIONS CONNECTING SAID PHOTOCONDUCTIVE ELEMENT IN PARALLEL WITH THAT PORTION OF SAID CIRCUIT CONNECTIONS INCLUDING SAID VOLTAGE DEPENDENT RESISTOR AND SAID RELAY WINDING ONLY, SAID VOLTAGE DEPENDENT RESISTOR HAVING SUFFICIENT CONDUCTANCE AT THE APPLIED VOLTAGE WHEN SAID PARALLEL CONNECTED PHOTOCONDUCTIVE ELEMENT IS NONCONDUCTIVE IN THE ABSENCE OF BURNER FLAME TO PERMIT OPERATIVE ENERGIZATION OF SAID RELAY WINDING, AND SAID PHOTOCONDUCTIVE ELEMENT BEING SUFFICIENTLY CONDUCTIVE WHEN BURNER FLAME EXISTS TO EFFECT A SUFFICIENT DROP IN THE APPLIED VOLTAGE ON SAID PARALLEL CONNECTED VOLTAGE DEPENDENT RESISTOR TO REDUCE ITS CONDUCTANCE TO THE POINT WHEREIN SAID RELAY WINDING IS NO LONGER OPERATIVELY ENERGIZED.
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) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |