GB996726A - Improvements in or relating to condition sensing circuitry - Google Patents

Improvements in or relating to condition sensing circuitry

Info

Publication number
GB996726A
GB996726A GB49164/63A GB4916463A GB996726A GB 996726 A GB996726 A GB 996726A GB 49164/63 A GB49164/63 A GB 49164/63A GB 4916463 A GB4916463 A GB 4916463A GB 996726 A GB996726 A GB 996726A
Authority
GB
United Kingdom
Prior art keywords
condenser
transistor
flame
relay
electrode
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
GB49164/63A
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.)
Electronics Corp of America
Original Assignee
Electronics Corp of America
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 Electronics Corp of America filed Critical Electronics Corp of America
Publication of GB996726A publication Critical patent/GB996726A/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
    • F23N5/02—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
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
    • F23N5/123—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2229/00—Flame sensors
    • F23N2229/12—Flame sensors with flame rectification current detecting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2229/00—Flame sensors
    • F23N2229/14—Flame sensors using two or more different types of flame sensor
    • 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
    • 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
    • F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Control Of Combustion (AREA)

Abstract

996,726. Detecting burner flames. ELECTRONICS CORPORATION OF AMERICA. Dec. 12, 1963 [Dec. 18, 1962], No. 49164/63. Heading F4T. [Also in Divisions G1 and H3] A condenser 18, Fig. 1, is charged from an AC source by the rectifying action of a photocell 26 sensing a gas burner flame 12 or by an electrode 14 disposed in the flame and the condenser is partially discharged by a neon-filled glow discharge tube 30 to provide a signal which is applied to a transistor 40 in an amplifier adapted to energize a relay 54 having contacts controlling an indicator circuit. The primary winding of a stepdown transformer 34 is connected into the condenser discharge circuit and a further condenser 36 is connected across the primary winding to form therewith a damped oscillatory circuit so that a series of pulses are derived from the original discharge pulse. The transistor 40 is an NPN transistor connected in common emitter configuration. The amplifier also includes a PNP transistor 42 connected in emitter follower configuration and a PNP transistor 44 which produces an inverted pulse in the relay 54. A condenser 56 across the relay produces a slow release operation. In an alternative arrangement, Fig. 2, a condenser 88 is charged by the rectifying action of the flame electrode 60 or a photo-cell 66. When the neon tube 90 breaks down a normally conductive transistor 94 in a monostable vibrator comprising the transistor 94 and a second transistor 100 is rendered non- conducting and remains so until a condenser 112 has discharged. Initially the base electrode 122 of a third transistor 120 is positive so that the transistor is non-conducting but immediately after the vibrator is triggered the voltage on the base 122 becomes negative and the flame relay 130 is therefore energized. A condenser 110 extends the period at which the base is negative. A resistance 84 and a condenser 82 allow rapid charging of the distributed capacitance between the flame electrode leads and ground. Silicon controlled rectifiers or switches may be utilized to respond to the flame indicating signal.
GB49164/63A 1962-12-18 1963-12-12 Improvements in or relating to condition sensing circuitry Expired GB996726A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US245525A US3238423A (en) 1962-12-18 1962-12-18 Combustion control apparatus

Publications (1)

Publication Number Publication Date
GB996726A true GB996726A (en) 1965-06-30

Family

ID=22927030

Family Applications (1)

Application Number Title Priority Date Filing Date
GB49164/63A Expired GB996726A (en) 1962-12-18 1963-12-12 Improvements in or relating to condition sensing circuitry

Country Status (3)

Country Link
US (1) US3238423A (en)
CH (1) CH424059A (en)
GB (1) GB996726A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348104A (en) * 1964-12-14 1967-10-17 American Gas Ass Bias-controlled a. c.-operable voltage threshold circuit, and systems employing same
US3412293A (en) * 1965-12-13 1968-11-19 Honeywell Inc Burner control apparatus with photodarlington flame detector
US3423158A (en) * 1966-05-12 1969-01-21 American Radiator & Standard Combustion control circuit
US3437884A (en) * 1966-11-21 1969-04-08 Protection Controls Inc Flame monitoring circuit
GB1277402A (en) * 1968-08-27 1972-06-14 United Gas Industries Ltd Flame detection system
DE3026787C2 (en) * 1980-06-19 1982-08-26 LGZ Landis & Gyr Zug AG, 6301 Zug Intrinsically safe flame monitor
US4906178A (en) * 1983-07-25 1990-03-06 Quantum Group, Inc. Self-powered gas appliance
PL2265867T3 (en) * 2008-03-07 2019-04-30 Bertelli & Partners Srl Improved method and device to detect the flame in a burner operating on a solid, liquid or gaseous combustible
US10151492B2 (en) * 2014-10-22 2018-12-11 Grand Mate Co., Ltd. Ignition controlling device of gas appliance

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556961A (en) * 1947-02-24 1951-06-12 Honeywell Regulator Co Flame detection apparatus
US2705296A (en) * 1951-04-05 1955-03-29 Landis & Gyr Ag Fuel control apparatus
US3117311A (en) * 1958-06-21 1964-01-07 Frans C Lemaire Fire detectors
US3156908A (en) * 1961-12-04 1964-11-10 Viking Corp Flame responsive apparatus
US3170689A (en) * 1962-04-27 1965-02-23 Raymond E Brown Foul detecting system with transistor output switch
US3119021A (en) * 1962-10-01 1964-01-21 Howard I Podell Variable time delay sequencing arrangement

Also Published As

Publication number Publication date
CH424059A (en) 1966-11-15
US3238423A (en) 1966-03-01

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