GB1332153A - Safety device for gas-burning appliances - Google Patents
Safety device for gas-burning appliancesInfo
- Publication number
- GB1332153A GB1332153A GB1332153DA GB1332153A GB 1332153 A GB1332153 A GB 1332153A GB 1332153D A GB1332153D A GB 1332153DA GB 1332153 A GB1332153 A GB 1332153A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electromagnet
- valve
- current
- switch
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
- F23N5/105—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples using electrical or electromechanical means
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
Abstract
1332153 Controlling gas burners A G SUTHERLAND Ltd 29 Oct 1970 [28 Jan 1970 17 Feb 1970] 4032/70 and 7447/70 Heading F4T [Also in Division H2] A safety device for a gas burning appliance comprises a magnetic flame-failure device having an electromagnet 1 powdered by the current from a thermocouple 2 which is heated by a main or pilot burner, the electromagnet maintaining a gas valve, (not shown) coupled to the armature 3, in an open position unless the main or pilot burner is extinguished, a switch controlled means being operative to apply an electrical signal to the electromagnet 1 so that the electromagnet can no longer retain the valve in its open position. In Fig. 1 the switch controlled means comprises the secondary 4 of a mains transformer 5, a rectifier diode 6, a current limiting resistor 7 and a thermally operated switch 8. The switch 8, which may be positioned in a part of the burner subject to overheating, closes above a specified temperature and a D.C. voltage of equal value but opposite polarity to that generated by the thermocouple is applied across the electromagnet causing the valve to close. In Fig. 5 a full wave rectifier 32 is connected across a secondary 24 of a mains transformer, closure of a thermally operated switch 28 resulting in current from the rectifier being fed via resistor 35 to the electromagnet, closing the valve. A cell 29 is connected across the rectifier and is continually charged so that if switch 28 closes during a mains failure, cell 29 supplies the current. Alternatively the full wave rectifier is omitted, the cell supplying the current at all times. In other embodiments the electrical signal is provided by the discharge of a capacitor or by an A.C. signal superimposed on the D.C. or the thermocouple. To permit the gas supply to be cut off in response to variables other than the absence of flame or over-heating a circuit comprising a transformer secondary 33, electrical switches 31 and a solenoid operated valve 30 in series with the main gas valve is provided, closure of both switches 31 serving to cut off the gas supply.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB744770 | 1970-10-29 | ||
GB403270 | 1970-10-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1332153A true GB1332153A (en) | 1973-10-03 |
Family
ID=26238779
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1332153D Expired GB1332153A (en) | 1970-10-29 | 1970-10-29 | Safety device for gas-burning appliances |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1332153A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2149597A (en) * | 1980-09-11 | 1985-06-12 | Electro Matic Prod Co | Battery charge system |
GB2169732A (en) * | 1985-01-16 | 1986-07-16 | Rinnai Kk | Safety apparatus for equipment incorporating a flame failure safety circuit |
FR2583856A1 (en) * | 1985-06-24 | 1986-12-26 | Bosch Siemens Hausgeraete | TEMPORIZED CUTTING CIRCUIT OF A GAS BURNER |
-
1970
- 1970-10-29 GB GB1332153D patent/GB1332153A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2149597A (en) * | 1980-09-11 | 1985-06-12 | Electro Matic Prod Co | Battery charge system |
GB2169732A (en) * | 1985-01-16 | 1986-07-16 | Rinnai Kk | Safety apparatus for equipment incorporating a flame failure safety circuit |
FR2583856A1 (en) * | 1985-06-24 | 1986-12-26 | Bosch Siemens Hausgeraete | TEMPORIZED CUTTING CIRCUIT OF A GAS BURNER |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |