GB1345021A - Fuel burner safety control circuit - Google Patents

Fuel burner safety control circuit

Info

Publication number
GB1345021A
GB1345021A GB1999271*[A GB1999271A GB1345021A GB 1345021 A GB1345021 A GB 1345021A GB 1999271 A GB1999271 A GB 1999271A GB 1345021 A GB1345021 A GB 1345021A
Authority
GB
United Kingdom
Prior art keywords
switch
relay
control circuit
safety control
time delay
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
Application number
GB1999271*[A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Combustion Engineering Inc
Original Assignee
Combustion Engineering Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Combustion Engineering Inc filed Critical Combustion Engineering Inc
Publication of GB1345021A publication Critical patent/GB1345021A/en
Expired legal-status Critical Current

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
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/245—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electrical or electromechanical means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
    • H02H3/247—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage having timing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/04—Fail safe for electrical power failures

Abstract

1345021 Burner safety control circuit COMBUSTION ENG Inc 10 June 1971 [11 June 1970] 19992/71 Heading F4T A burner safety control circuit which distinguishes between transient power interruptions and emergency conditions comprises a safety shut off valve 34 across which is connected a time delay loop 36 whereby, in the case of a power interruption a trip delay unit 42 can maintain valve 34 energized (i.e. open) for a discrete period, e.g. of one second until a time delay switch 40 opens in delayed response to de-energization of its controlling relay 22 and a further switch 24 controlled by relay 22 maintains for the same discrete period a path for re-energization of relays 18 and 22 if the power interruption is only transient; in the event of emergency conditions such as flame failure or feedwater interruption however, a switch 14 responsive to boiler conditions opens to de-energize relay 18 which closes a switch 26 whereupon a relay 28 is energized and a second time delay switch 38 in loop 36 is opened after a discrete period much less than that of switch 40 (e.g. 0À1 second) to shut off valve 34. As well as switch 14 responsive to boiler conditions, a switch 30 may open if the emergency is in the burner system.
GB1999271*[A 1970-06-11 1971-06-10 Fuel burner safety control circuit Expired GB1345021A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4536970A 1970-06-11 1970-06-11

Publications (1)

Publication Number Publication Date
GB1345021A true GB1345021A (en) 1974-01-30

Family

ID=21937494

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1999271*[A Expired GB1345021A (en) 1970-06-11 1971-06-10 Fuel burner safety control circuit

Country Status (6)

Country Link
US (1) US3619724A (en)
JP (1) JPS5323540B1 (en)
CA (1) CA934466A (en)
ES (1) ES197257Y (en)
GB (1) GB1345021A (en)
ZA (1) ZA713755B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1089054A (en) * 1976-08-20 1980-11-04 William F. Helwig, Jr. Delay circuit
DE2815780C2 (en) * 1978-04-12 1986-10-23 Robert Bosch Gmbh, 7000 Stuttgart Safety device for controlling switching means in the supply line of electrical consumers in connection with a fuel metering system in an internal combustion engine
US4992040A (en) * 1990-03-19 1991-02-12 Honeywell Inc. Airflow switch checking circuit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3254871A (en) * 1963-10-31 1966-06-07 Auto Tronic Control Co Inc Time delay system
US3275058A (en) * 1963-11-27 1966-09-27 D G Controls Inc Oil burner control systems

Also Published As

Publication number Publication date
JPS5323540B1 (en) 1978-07-15
ES197257Y (en) 1975-09-01
US3619724A (en) 1971-11-09
ES197257U (en) 1975-04-01
CA934466A (en) 1973-09-25
ZA713755B (en) 1972-04-26

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees