GB1272334A - A combustion control device for furnaces - Google Patents

A combustion control device for furnaces

Info

Publication number
GB1272334A
GB1272334A GB2343970A GB2343970A GB1272334A GB 1272334 A GB1272334 A GB 1272334A GB 2343970 A GB2343970 A GB 2343970A GB 2343970 A GB2343970 A GB 2343970A GB 1272334 A GB1272334 A GB 1272334A
Authority
GB
United Kingdom
Prior art keywords
flame
switch
current
coil
gate
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
GB2343970A
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.)
SIMICON CO
Original Assignee
SIMICON CO
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 SIMICON CO filed Critical SIMICON CO
Publication of GB1272334A publication Critical patent/GB1272334A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H01H71/162—Electrothermal mechanisms with bimetal element with compensation for ambient temperature
    • 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
    • F23N5/04—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using bimetallic elements
    • F23N5/042—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using bimetallic elements using electronic means
    • 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
    • F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
    • F23N5/082—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
    • F23N5/206—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays using electrical or electromechanical means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/22—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release
    • H01H73/30—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release reset by push-button, pull-knob or slide

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)
  • Thermally Actuated Switches (AREA)
  • Regulation And Control Of Combustion (AREA)

Abstract

1,272,334. Controlling burners. SIMICON CO. 14 May, 1970 [15 Oct., 1969], No. 23439/70. Heading F4T. A combustion control device for a furnace comprises a burner 34 control means connected to the A.C. mains, e.g. a source of 120 V., a low voltage (8 V.) control circuit including a cadmium sulphide flame detector 32, a semiconductor device in the form of silicon controlled rectifier SCR1, to actuate the control means in response to a signal from the flame detector 32, a bimetallic lockout safety switch 20 (see Specification 1,272,335) for interrupting current flow through the rectifier SCR1, a triac Q1 and a thermostat 24, a reed switch 25 having normally open contacts actuating the burner control means and being controlled by a pair of electrically insulated coils RC1, RC2 having additive flux linkages whereby energization of both coils RC1, RC2 is necessary to effect closing of switch 20 and continued energization of one coil RC1, by current rectified by diode D1 and capacitor C2, maintains switch closure. When thermostat 24 senses a demand for heat, flux is established in coil RC1 and the gate 60 of silica controlled rectifier SCR1 is triggered, and if the flame detector 32 senses no flame, current is riot shunted from gate 60, and silicon controlled rectifier SCR1 conducts, coil RC2 is energized to close contacts 26, 28 of reed switch 25, and triac Q1 passes power to burner 34. If detector 32 continues to sense no flame current in heater coil 23 effects cut-out of switch 20 after about 15 sec., but if flame is sensed, current will be shunted from gate 60 and cut-out will not occur. The device will fail-safe upon circuit failure.
GB2343970A 1969-10-15 1970-05-14 A combustion control device for furnaces Expired GB1272334A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US86652869A 1969-10-15 1969-10-15

Publications (1)

Publication Number Publication Date
GB1272334A true GB1272334A (en) 1972-04-26

Family

ID=25347795

Family Applications (2)

Application Number Title Priority Date Filing Date
GB5283770A Expired GB1272335A (en) 1969-10-15 1970-05-14 Electrical switch
GB2343970A Expired GB1272334A (en) 1969-10-15 1970-05-14 A combustion control device for furnaces

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB5283770A Expired GB1272335A (en) 1969-10-15 1970-05-14 Electrical switch

Country Status (4)

Country Link
US (1) US3624407A (en)
DE (2) DE2065212A1 (en)
FR (1) FR2065807A5 (en)
GB (2) GB1272335A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3732433A (en) * 1972-05-25 1973-05-08 Webster Electric Co Inc Combustion control circuit for a fuel burner
US3872320A (en) * 1973-09-12 1975-03-18 Lear Siegler Inc Furnace control circuit
US3892981A (en) * 1973-12-04 1975-07-01 Robertshaw Controls Co Electrical primary control system for furnaces
US3935473A (en) * 1973-12-06 1976-01-27 Robertshaw Controls Company Solid state stack switch control system
US3905748A (en) * 1974-06-24 1975-09-16 Robertshaw Controls Co Primary control system for furnaces
US4783600A (en) * 1986-11-25 1988-11-08 Shui Chang Automatic controller of the master gas switch

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3318358A (en) * 1966-03-04 1967-05-09 Liberty Comb Corp Burner igniter system
US3463600A (en) * 1967-03-15 1969-08-26 Honeywell Inc Control apparatus with redundant features
US3512372A (en) * 1967-12-28 1970-05-19 Matsushita Electronics Corp Defrosting controlling circuit means for electric refrigerator

Also Published As

Publication number Publication date
DE2029327B2 (en) 1975-01-30
DE2029327A1 (en) 1971-04-22
GB1272335A (en) 1972-04-26
DE2065212A1 (en) 1973-03-29
US3624407A (en) 1971-11-30
DE2029327C3 (en) 1975-09-18
FR2065807A5 (en) 1971-08-06

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee