US3870929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition system and components thereof
Assignee: TDK Micronas GmbH
•
Filing: 1974-03-04
•
Granted: 1975-03-11
•
Expires: 1994-03-04
Abstract
Abstract A system for igniting, by a spark, the main burner of a gas fired device without the use of a pilot light from, for example, 12 or 24 volts. A unique oscillator provides the spark power and voltage. The oscillator also supplies the power to open the gas valve. A capacitor momentarily opens the valve. The valve is maintained open when a flame is present at the main burner.
Inventors
- 👤 Elmer A Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:08
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/12; F23N5/123; F23Q; F23Q3/00; F23Q3/004; F23N2227/00; F23N2227/36; F23N2233/00; F23N2233/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
220 words
A spark ignitor for a combustible fuel, said ignitor comprising: a first junction; a first switch for connection to a conductor having a positive potential to said first junction; first and second inductive means each having first and second leads; a charging resistor connected from said first junction to said first inductive means first lead;; a second switch for closure after said first switch is connected in parallel with said charging resistor; a silicon-controlled rectifier (SCR) having an anode, a cathode and a gate, said anode being connected from said first inductive means second lead; a diode having an anode connected from said SCR cathode, and a cathode connected to said second inductive means first lead, said second inductive means second lead being adapted for connection to a conductor of a negative potential; a main capacitor connected from said first inductive means first lead to said diode anode; said diode cathode being connected to said SCR gate; a second junction connected from said first inductive means first lead; starting means and hold off connected from said second junction to said SCR gate to fire said SCR when said second switch is closed; and conductor means connected with said first inductive means to establish an arc when the energy stored in said main capacitor is transferred to said first inductive means.
Claim 2
Dependent Claim
220 words
A spark ignitor for a combustible fuel, said ignitor comprising: a first junction; a first switch for connection to a conductor having a positive potential to said first junction; first and second inductive means each having first and second leads; a charging resistor connected from said first junction to said first inductive means first lead;; a second switch for closure after said first switch is connected in parallel with said charging resistor; a silicon-controlled rectifier (SCR) having an anode, a cathode and a gate, said anode being connected from said first inductive means second lead; a diode having an anode connected from said SCR cathode, and a cathode connected to said second inductive means first lead, said second inductive means second lead being adapted for connection to a conductor of a negative potential; a main capacitor connected from said first inductive means first lead to said diode anode; said diode cathode being connected to said SCR gate; a second junction connected from said first inductive means first lead; starting means and hold off connected from said second junction to said SCR gate to fire said SCR when said second switch is closed; and conductor means connected with said first inductive means to establish an arc when the energy stored in said main capacitor is transferred to said first inductive means.
Claim 3
Dependent Claim
220 words
A spark ignitor for a combustible fuel, said ignitor comprising: a first junction; a first switch for connection to a conductor having a positive potential to said first junction; first and second inductive means each having first and second leads; a charging resistor connected from said first junction to said first inductive means first lead;; a second switch for closure after said first switch is connected in parallel with said charging resistor; a silicon-controlled rectifier (SCR) having an anode, a cathode and a gate, said anode being connected from said first inductive means second lead; a diode having an anode connected from said SCR cathode, and a cathode connected to said second inductive means first lead, said second inductive means second lead being adapted for connection to a conductor of a negative potential; a main capacitor connected from said first inductive means first lead to said diode anode; said diode cathode being connected to said SCR gate; a second junction connected from said first inductive means first lead; starting means and hold off connected from said second junction to said SCR gate to fire said SCR when said second switch is closed; and conductor means connected with said first inductive means to establish an arc when the energy stored in said main capacitor is transferred to said first inductive means.
Claim 4
Dependent Claim
220 words
A spark ignitor for a combustible fuel, said ignitor comprising: a first junction; a first switch for connection to a conductor having a positive potential to said first junction; first and second inductive means each having first and second leads; a charging resistor connected from said first junction to said first inductive means first lead;; a second switch for closure after said first switch is connected in parallel with said charging resistor; a silicon-controlled rectifier (SCR) having an anode, a cathode and a gate, said anode being connected from said first inductive means second lead; a diode having an anode connected from said SCR cathode, and a cathode connected to said second inductive means first lead, said second inductive means second lead being adapted for connection to a conductor of a negative potential; a main capacitor connected from said first inductive means first lead to said diode anode; said diode cathode being connected to said SCR gate; a second junction connected from said first inductive means first lead; starting means and hold off connected from said second junction to said SCR gate to fire said SCR when said second switch is closed; and conductor means connected with said first inductive means to establish an arc when the energy stored in said main capacitor is transferred to said first inductive means.
Claim 5
Dependent Claim
112 words
The invention as defined in claim 1, wherein said starting and hold off means includes first and second resistors, a unijunction transistor having an emitter and first and second bases, an auxiliary capacitor, and third, fourth and fifth junctions, sid first resistor being connected between said second and third junctions, said second resistor being connected between said third and fourth junctions, said SCR anode being connected from said fourth junction, said transistor second base being connected from said third junction, said transistor emitter being connected from said fifth junction, said auxiliary capacitor being connected from said fifth junctionn to said SCR gate, said transistor first base being connected to said SCR gate.
Claim 6
Dependent Claim
196 words
Apparatus for periodically producing first signal portions of a higher frequEncy and for periodically producing second signal portions alternately with said first signal portions, said second signal portions being of a frequency lower than said higher frequency, said apparatus comprising: means for providing a source of potential including first and second leads; a circuit connected between said first and second leads, said circuit including first, second and third junctions, first and second inductor means, a capacitor, a silicon-controlled rectifier (SCR) having an anode, a cathode and a gate, and a diode, said first lead being connected to said first junction, said first inductor means being connected from said first junction to said SCR anode, said capacitor being connected between said first and second junctions, said SCR cathode being connected to said second junction, said diode being connected between said second and third junctions and being poled to be conductive toward said third junction, said second inductor means being connected from said third junction to said second lead, said SCR gate being connected from said third junction; and utilization means coupled to said circuit, said utilization means includes spark electrode means for ignition of a combustible fuel.
Claim 7
Dependent Claim
196 words
Apparatus for periodically producing first signal portions of a higher frequEncy and for periodically producing second signal portions alternately with said first signal portions, said second signal portions being of a frequency lower than said higher frequency, said apparatus comprising: means for providing a source of potential including first and second leads; a circuit connected between said first and second leads, said circuit including first, second and third junctions, first and second inductor means, a capacitor, a silicon-controlled rectifier (SCR) having an anode, a cathode and a gate, and a diode, said first lead being connected to said first junction, said first inductor means being connected from said first junction to said SCR anode, said capacitor being connected between said first and second junctions, said SCR cathode being connected to said second junction, said diode being connected between said second and third junctions and being poled to be conductive toward said third junction, said second inductor means being connected from said third junction to said second lead, said SCR gate being connected from said third junction; and utilization means coupled to said circuit, said utilization means includes spark electrode means for ignition of a combustible fuel.
References Cited (Backward Citations)
US3338288A
Cited
US3377125A
Cited
US3818377A
Cited
US3632285A
Cited
US3662185A
Cited
US3781163A
Cited
US3824432A
Cited
US3813581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |