GB1109456A - Improvements in or relating to electrical safety systems - Google Patents

Improvements in or relating to electrical safety systems

Info

Publication number
GB1109456A
GB1109456A GB36892/65A GB3689265A GB1109456A GB 1109456 A GB1109456 A GB 1109456A GB 36892/65 A GB36892/65 A GB 36892/65A GB 3689265 A GB3689265 A GB 3689265A GB 1109456 A GB1109456 A GB 1109456A
Authority
GB
United Kingdom
Prior art keywords
relay
energized
flame
discharged
charged
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
GB36892/65A
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 GB1109456A publication Critical patent/GB1109456A/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
    • F23N2227/00—Ignition or checking
    • F23N2227/12—Burner simulation or checking
    • F23N2227/14—Flame simulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2229/00—Flame sensors
    • F23N2229/06—Flame sensors with periodical shutters; Modulation signals
    • 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

Abstract

1,109,456. Photo-electric burner control. ELECTRONICS CORPORATION OF AMERICA. Aug. 27, 1965 [Sept. 4, 1964], No. 36892/65. Heading G1A. [Also in Division F4] A burner control system is made to fail safe by periodically chopping the radiation from the flame falling on a detector 20. Thus when a flame is detected relay 24 is repeatedly energized and de-energized; in one state capacitor 44 is charged from a power source 40 and capacitor 46 is discharged through a relay 32, and in the other state capacitor 46 is charged and 44 discharged through the relay. Relay 32 is maintained energized by the repeated discharges to keep contacts 34 closed and the burner fuel valve 16 open. If the flame fails relay 24 remains de-energized and when 44 has discharged relay 32 drops out to close valve 16. If a fault develops whereby a flame signal is generated even when the cell 20 is unilluminated relay 24 remains energized and again valve 16 is closed. In a modification relay 32 is replaced by a double winding relay with the junction between the windings connected to the point 52, Fig. 2 (not shown). This permits the insertion of a resistance to make the discharge time of the capacitors 44 and 46 different. The relay 24 may be replaced by a switching transistor, Fig. 3 (not shown), or alternately illuminated photo-resistors.
GB36892/65A 1964-09-04 1965-08-27 Improvements in or relating to electrical safety systems Expired GB1109456A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US39447264A 1964-09-04 1964-09-04

Publications (1)

Publication Number Publication Date
GB1109456A true GB1109456A (en) 1968-04-10

Family

ID=23559092

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36892/65A Expired GB1109456A (en) 1964-09-04 1965-08-27 Improvements in or relating to electrical safety systems

Country Status (5)

Country Link
BE (1) BE669065A (en)
CH (1) CH449832A (en)
DE (1) DE1270214B (en)
GB (1) GB1109456A (en)
NL (1) NL6511430A (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE668829C (en) * 1934-09-16 1938-12-10 Zeiss Carl Fa Device for checking the operability of a photoelectric arrangement
DE943575C (en) * 1952-06-28 1956-05-24 Licentia Gmbh Procedure for self-securing photoelectric protection and control devices
DE1005675B (en) * 1953-07-09 1957-04-04 Licentia Gmbh Procedure for self-securing photoelectric protection and control devices
US3143161A (en) * 1963-04-26 1964-08-04 Electronics Corp America Self-checking condition responsive system

Also Published As

Publication number Publication date
DE1270214B (en) 1968-06-12
BE669065A (en)
CH449832A (en) 1968-01-15
NL6511430A (en) 1966-03-07

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