US4001638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition system
Assignee: Robertshaw Controls Co
•
Filing: 1974-11-29
•
Granted: 1977-01-04
•
Expires: 1994-11-29
Abstract
Abstract A solid state ignition system particularly adapted for use in igniting fuel oil, the system including plasma generator means, electronic trigger means and electronic brake means and being effective to produce an improved ionization arc between electrodes for the purpose of initiating fuel oil combustion.
Inventors
- 👤 Frederick T. Bauer
- 👤 Frederick J. Geary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:37
CPC Classifications
F; F23; F23Q; F23Q3/00; F23Q3/004
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
179 words
In an ignition system, the combination comprising plasma generating means adapted to be connected to a main line source of AC current, and combustion initiation means operatively connected to said plasma generating means, said plasma generating means including a silicon controlled rectifier having an anode, a cathode and a gate, a transformer having a primary winding and a secondary winding, a first capacitor, a first diode and a first resistor, said primary winding and said first diode being connected in series with said anode and said cathode, said first resistor being connected in parallel with said first diode, said first capacitor being connected in parallel with said anode and said cathode through said primary winding, said plasma generating means also incuding trigger means, said trigger means including said silicon controlled rectifier, second and third resistors, a second diode, a second capacitor and a trigger diode, said second resistor, said second diode, said second capacitor and said trigger diode being connected across said anode and said cathode of said silicon controlled rectifier, said third resistor being connected to said gate.
Claim 2
Dependent Claim
179 words
In an ignition system, the combination comprising plasma generating means adapted to be connected to a main line source of AC current, and combustion initiation means operatively connected to said plasma generating means, said plasma generating means including a silicon controlled rectifier having an anode, a cathode and a gate, a transformer having a primary winding and a secondary winding, a first capacitor, a first diode and a first resistor, said primary winding and said first diode being connected in series with said anode and said cathode, said first resistor being connected in parallel with said first diode, said first capacitor being connected in parallel with said anode and said cathode through said primary winding, said plasma generating means also incuding trigger means, said trigger means including said silicon controlled rectifier, second and third resistors, a second diode, a second capacitor and a trigger diode, said second resistor, said second diode, said second capacitor and said trigger diode being connected across said anode and said cathode of said silicon controlled rectifier, said third resistor being connected to said gate.
Claim 3
Dependent Claim
220 words
In an ignition system, the combination comprising plasma generating means adapted to be connected to a main line source of AC current, and combustion initiation means operatively connected to said plasma generating means, said plasma generating means including a silicon controlled rectifier having an anode, a cathode and a gate, a transformer having a primary winding and a secondary winding, a first capacitor, a first diode and a first resistor, said primary winding and said first diode being connected in series with said anode and said cathode, said first resistor being connected in parallel with said first diode, said first capacitor being connected in parallel with said anode and said cathode through said primary winding, said plasma generating means also including trigger means and electronic brake means, said trigger means including said silicon controlled rectifier, second and third resistors, a second diode, a second capacitor and a trigger diode, said second resistor, said second diode, said second capacitor and said trigger diode being connected across said anode and said cathode of said silicon controlled rectifier, said third resistor being connected to said gate, said electronic brake means comprising a third capacitor, a third diode and fourth and fifth resistors, said third diode, said third, fourth and fifth resistors and said third capacitor being connected in parallel with said first capacitor.
Claim 4
Dependent Claim
220 words
In an ignition system, the combination comprising plasma generating means adapted to be connected to a main line source of AC current, and combustion initiation means operatively connected to said plasma generating means, said plasma generating means including a silicon controlled rectifier having an anode, a cathode and a gate, a transformer having a primary winding and a secondary winding, a first capacitor, a first diode and a first resistor, said primary winding and said first diode being connected in series with said anode and said cathode, said first resistor being connected in parallel with said first diode, said first capacitor being connected in parallel with said anode and said cathode through said primary winding, said plasma generating means also including trigger means and electronic brake means, said trigger means including said silicon controlled rectifier, second and third resistors, a second diode, a second capacitor and a trigger diode, said second resistor, said second diode, said second capacitor and said trigger diode being connected across said anode and said cathode of said silicon controlled rectifier, said third resistor being connected to said gate, said electronic brake means comprising a third capacitor, a third diode and fourth and fifth resistors, said third diode, said third, fourth and fifth resistors and said third capacitor being connected in parallel with said first capacitor.
Claim 5
Dependent Claim
182 words
In an electrical control system for oil burners, the combination comprising plasma generating means adapted to be connected to a main line source of AC current, and combustion initiation means controlled by said plasma generating means, said plasma generating means including a silicon controlled rectifier having an anode, a cathode and a gate, a transformer having a primary winding and a secondary winding, a first capacitor, a first diode and a first resistor, said primary winding and said first diode being connected in series with said anode and said cathode, said first resistor being connected in parallel with said first diode, said first capacitor being connected in parallel with said anode and said cathode through said primary winding, said plasma generating means also including trigger means, said trigger means including said silicon controlled rectifier, second and third resistors, a second diode, a second capacitor and a trigger diode, said second resistor, said second diode, said second capacitor and said trigger diode being connected across said anode and said cathode of said silicon controlled rectifier, said third resistor being connected to said gate.
Claim 6
Dependent Claim
182 words
In an electrical control system for oil burners, the combination comprising plasma generating means adapted to be connected to a main line source of AC current, and combustion initiation means controlled by said plasma generating means, said plasma generating means including a silicon controlled rectifier having an anode, a cathode and a gate, a transformer having a primary winding and a secondary winding, a first capacitor, a first diode and a first resistor, said primary winding and said first diode being connected in series with said anode and said cathode, said first resistor being connected in parallel with said first diode, said first capacitor being connected in parallel with said anode and said cathode through said primary winding, said plasma generating means also including trigger means, said trigger means including said silicon controlled rectifier, second and third resistors, a second diode, a second capacitor and a trigger diode, said second resistor, said second diode, said second capacitor and said trigger diode being connected across said anode and said cathode of said silicon controlled rectifier, said third resistor being connected to said gate.
Claim 7
Dependent Claim
223 words
In an electrical control system for oil burners, the combination comprising plasma generating means adapted to be connected to a main line source of AC current, and combustion initiation means controlled by said plasma generating means, said plasma generating means including a silicon controlled rectifier having an anode, a cathode and a gate, a transformer having a primary winding and a secondary winding, a first capacitor, a first diode and a first resistor, said primary winding and said first diode being connected in series with said anode and said cathode, said first resistor being connected in parallel with said first diode, said first capacitor being connected in parallel with said anode and said cathode through said primary winding, said plasma generating means also including trigger means and electronic brake means, said trigger means including said silicon controlled rectifier, second and third resistors, a second diode, a second capacitor and a trigger diode, said second resistor, said second diode, said second capacitor and said trigger diode being connected across said anode and said cathode of said silicon controlled rectifier, said third resistor being connected to said gate, said electronic brake means comprising a third capacitor, a third diode and fourth and fifth resistors, said third diode, said third, fourth and fifth resistors and said third capacitor being connected in parallel with said first capacitor.
Claim 8
Dependent Claim
223 words
In an electrical control system for oil burners, the combination comprising plasma generating means adapted to be connected to a main line source of AC current, and combustion initiation means controlled by said plasma generating means, said plasma generating means including a silicon controlled rectifier having an anode, a cathode and a gate, a transformer having a primary winding and a secondary winding, a first capacitor, a first diode and a first resistor, said primary winding and said first diode being connected in series with said anode and said cathode, said first resistor being connected in parallel with said first diode, said first capacitor being connected in parallel with said anode and said cathode through said primary winding, said plasma generating means also including trigger means and electronic brake means, said trigger means including said silicon controlled rectifier, second and third resistors, a second diode, a second capacitor and a trigger diode, said second resistor, said second diode, said second capacitor and said trigger diode being connected across said anode and said cathode of said silicon controlled rectifier, said third resistor being connected to said gate, said electronic brake means comprising a third capacitor, a third diode and fourth and fifth resistors, said third diode, said third, fourth and fifth resistors and said third capacitor being connected in parallel with said first capacitor.
Claim 9
Dependent Claim
28 words
The combination as set forth in claim 4, said combustion initiation means including said secondary winding, and a pair of spaced electrodes electrically connected to said secondary winding.
Claim 10
Dependent Claim
19 words
The combination as set forth in claim 5, including choke means electrically connected in series with said primary winding.
Claim 11
Dependent Claim
19 words
The combination as set forth in claim 6, including additional resistance means connected in series with said choke means.
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) | 1980-01-04 | 1980-07-05 | 1981-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-04 | 1984-07-05 | 1985-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-04 | 1988-07-05 | 1989-01-04 | $7700.00 | Window Closed / Lapsed |