US3597139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual coil gas burner control circuit
Assignee: Whirlpool Corp
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Filing: 1969-07-09
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Granted: 1971-08-03
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Expires: 1989-07-09
Abstract
Abstract A fuel control and ignition system for a gaseous fuel burning apparatus such as a clothes dryer which uses an igniter and includes two gas valves in series in the gas fuel line to the burner. Both of the gas valves must be turned on before the burner can ignite. The first valve is controlled by a pair of coils in circuit with the timing switch and thermostat one coil of which is in circuit with a temperature responsive switch and the second valve is controlled by a coil in circuit with the timing switch and thermostat and also the igniter element. The temperature responsive switch is connected in parallel with the coil of the second valve to bypass it until the temperature sensitive switch opens in response to the igniter and burner to allow the second valve to be actuated.
Inventors
- 👤 Alvin J Elders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:53
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
135 words
A fuel ignition system for controlling fuel flow to a burner from a supply line comprising (a) a pair of solenoid actuated valves arranged in series in said supply line, (b) first and second windings in control of said first solenoid valve, (c) a third winding in control of said second solenoid valve, (d) a temperature responsive switch connected in parallel with at least one of said windings to shunt it when said switch is closed, and (e) an igniter mounted in heat transfer relationship to said temperature sensitive switch and connected in series therewith, said ignition also being connected in parallel with at least one of said windings and in series with another of said windings for reducing the holding power of the winding in parallel with said igniter when said switch is open.
Claim 2
Dependent Claim
135 words
A fuel ignition system for controlling fuel flow to a burner from a supply line comprising (a) a pair of solenoid actuated valves arranged in series in said supply line, (b) first and second windings in control of said first solenoid valve, (c) a third winding in control of said second solenoid valve, (d) a temperature responsive switch connected in parallel with at least one of said windings to shunt it when said switch is closed, and (e) an igniter mounted in heat transfer relationship to said temperature sensitive switch and connected in series therewith, said ignition also being connected in parallel with at least one of said windings and in series with another of said windings for reducing the holding power of the winding in parallel with said igniter when said switch is open.
Claim 3
Dependent Claim
121 words
A fuel ignition system for controlling fuel flow to a burner from a supply line comprising (a) a pair of solenoid-actuated valves arranged in series in said supply line, (b) first and second windings in control of said first solenoid valve, (c) a third winding in control of said second solenoid valve, (d) a pair of power leads connected to opposite sides of the first windings on said first solenoid valve, (e) said second and third windings connected in series between said first and second power leads, (f) a temperature responsive switch connected in parallel with said third winding, and (g) an igniter mounted in heat transfer relationship to said temperature sensitve switch and connected in parallel with the second winding.
Claim 4
Dependent Claim
121 words
A fuel ignition system for controlling fuel flow to a burner from a supply line comprising (a) a pair of solenoid-actuated valves arranged in series in said supply line, (b) first and second windings in control of said first solenoid valve, (c) a third winding in control of said second solenoid valve, (d) a pair of power leads connected to opposite sides of the first windings on said first solenoid valve, (e) said second and third windings connected in series between said first and second power leads, (f) a temperature responsive switch connected in parallel with said third winding, and (g) an igniter mounted in heat transfer relationship to said temperature sensitve switch and connected in parallel with the second winding.
Claim 5
Dependent Claim
197 words
A fuel ignition system for controlling fuel flow to a burner from a supply line comprising (a) flow control means comprising first and second solenoid-actuated valves connected in series in said supply line, (b) first and second actuating means comprising first and second windings on the first solenoid, (c) third actuating means comprising a third winding on the second solenoid, (d) a temperature responsive electrical circuit connected to the third actuating means to control it as a function of temperature and wherein said temperature responsive electrical circuit comprises a pair of power leads with the first sides of the first and second windings connected to a first of said power leads, (e) an igniter with one side connected to said first power lead, the second side of the first winding and the first side of the third winding connected to the second of said power leads, the second sides of said second and third windings and the igniter connected together, and (f) a temperature sensitive switch mounted in heat transfer relationship to said igniter and said burner and connected between the second power lead and the second sides of the second and third windings and the igniter.
Claim 6
Dependent Claim
197 words
A fuel ignition system for controlling fuel flow to a burner from a supply line comprising (a) flow control means comprising first and second solenoid-actuated valves connected in series in said supply line, (b) first and second actuating means comprising first and second windings on the first solenoid, (c) third actuating means comprising a third winding on the second solenoid, (d) a temperature responsive electrical circuit connected to the third actuating means to control it as a function of temperature and wherein said temperature responsive electrical circuit comprises a pair of power leads with the first sides of the first and second windings connected to a first of said power leads, (e) an igniter with one side connected to said first power lead, the second side of the first winding and the first side of the third winding connected to the second of said power leads, the second sides of said second and third windings and the igniter connected together, and (f) a temperature sensitive switch mounted in heat transfer relationship to said igniter and said burner and connected between the second power lead and the second sides of the second and third windings and the igniter.
Claim 7
Dependent Claim
34 words
A fuel ignition system for controlling fuel flow to a burner from a supply line according to claim 3 comprising an impedance connected between the second winding and the second side of said igniter.
Claim 8
Dependent Claim
25 words
A fuel ignition system for controlling fuel flow to a burner from a supply line according to claim 4 wherein said impedance comprises a resistor.
Claim 9
Dependent Claim
28 words
A fuel ignition system for controlling fuel flow to a burner from a supply line according to claim 3 wherein said igniter comprises a silicon carbide resistive element.
Claim 10
Dependent Claim
32 words
A fuel ignition system for controlling fuel flow to a burner from a supply line according to claim 3 comprising a thermostat switch connected in series with one of said power leads.
Claim 11
Dependent Claim
33 words
A fuel ignition system for controlling fuel flow to a burner from a supply line according to claim 3 comprising a timer controlled switch connected in series with one of said power leads.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |