US3653443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire extinguishing system for cook stoves and ranges
Assignee: Individual
•
Filing: 1970-09-25
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Granted: 1972-04-04
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Expires: 1990-09-25
Abstract
Abstract An automatic fire extinguishing system for a cooking range having top burners includes a hood mountable over the range. A tank containing fire extinguishing fluid is removably mounted in the hood. The tank has a solenoid operated valve connected in circuit with a thermostat and power line to discharge fluid from the tank when the thermostat is operated. The range may have electric or gas burners. A solenoid operated switch or solenoid operated valve is connected in circuit with the thermostat to open the power line to the electric burners or to open the gas main to the gas burners when the thermostat operates. An automatically operated exhaust fan and alarm are also provided. The system includes manually operable set and reset switch means.
Inventors
- 👤 Walter E Dockery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:22
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/20; A; A62; A62C; A62C3/00; A62C3/006; F24C15/2021; Y; Y10; Y10S; Y10S55/00; Y10S55/36
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
159 words
An automatic fire extinguishing system for a cooking range having top burners comprising a hood mountable over the range, said hood having a closed top, vertical side walls and an open bottom; a tank containing fire extinguishing fluid removably disposed inside the walls of the hood; a solenoid operated valve on said tank for releasing said fluid when the solenoid is energized; at least one thermostat set to operate at a predetermined temperature and disposed for sensing the temperature of a fire between the range and hood; an electric power line; and circuit means interconnecting the thermostat, solenoid and power line for actuating the valve when the thermostat operates upon the occurrence of a fire between the range and hood, and relay means in said circuit connected between the power line and said solenoid and arranged for energizing the solenoid and keeping the solenoid energized regardless of the temperature sensed by the thermostat after the thermostat is once operated.
Claim 2
Dependent Claim
159 words
An automatic fire extinguishing system for a cooking range having top burners comprising a hood mountable over the range, said hood having a closed top, vertical side walls and an open bottom; a tank containing fire extinguishing fluid removably disposed inside the walls of the hood; a solenoid operated valve on said tank for releasing said fluid when the solenoid is energized; at least one thermostat set to operate at a predetermined temperature and disposed for sensing the temperature of a fire between the range and hood; an electric power line; and circuit means interconnecting the thermostat, solenoid and power line for actuating the valve when the thermostat operates upon the occurrence of a fire between the range and hood, and relay means in said circuit connected between the power line and said solenoid and arranged for energizing the solenoid and keeping the solenoid energized regardless of the temperature sensed by the thermostat after the thermostat is once operated.
Claim 3
Dependent Claim
42 words
An automatic fire extinguishing system as defined in claim 1, further comprising an apertured pipe arranged as a rectangular ring inside the hood and connected to said tank via said valve for spraying said fluid on the range and across the hood.
Claim 4
Dependent Claim
61 words
An automatic fire extinguishing system as defined in claim 1, wherein said range includes electric burners, said system further comprising switch means connected in said power line for cutting off power supplied to the burners, and another solenoid connected in said circuit and arranged to open said switch means when the first named solenoid is energized by operation of said thermostat.
Claim 5
Dependent Claim
88 words
An automatic fire extinguishing system as defined in claim 3, further comprising relay means in said circuit connected between the power line and both solenoids and arranged for energizing the solenoids and keeping the solenoids energized regardless of the temperature sensed by the thermostat after the thermostat is once operated; and reset switch means connected in circuit with said relay means for resetting the same to deenergized condition and for deenergizing the solenoids to close the first named switch means and to close said valve on the tank.
Claim 6
Dependent Claim
34 words
An automatic fire extinguishing system as defined in claim 1, further comprising reset switch means connected in circuit with said relay means for resetting the same to deenergized condition and for deenergizing said solenoid.
Claim 7
Dependent Claim
65 words
An automatic fire extinguishing system as defined in claim 5, further comprising a motor driven fan arranged to draw fumes and smoke from the hood; and time delay relay means connected in circuit with said first named relay means and said fan for operating the fan only after a predetermined time has elapsed following operation of said solenoid to discharge said fluid from said tank.
Claim 8
Dependent Claim
33 words
An automatic fire extinguishing system as defined in claim 6, further comprising an alarm connected in circuit with the first named relay means for actuation thereby when said first relay means is energized.
Claim 9
Dependent Claim
55 words
An automatic fire extinguishing system as defined in claim 1, wherein said range includes gas burners and a gas main connected to said burners, said system further comprising another solenoid operated valve connected in said circuit and arranged to close said gas main when the first named solenoid is energized by operation of said thermostat.
Claim 10
Dependent Claim
53 words
An automatic fire extinguishing system as defined in claim 1, further comprising reset switch means connected in said circuit for deenergizing said solenoid after the same has become energized; and manually operable set switch means connected in said circuit and arranged to energize said solenoid independently of the temperature sensed by said thermostat.
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |