GB986421A - Improvements in or relating to light-sensitive probes - Google Patents

Improvements in or relating to light-sensitive probes

Info

Publication number
GB986421A
GB986421A GB1205261A GB1205261A GB986421A GB 986421 A GB986421 A GB 986421A GB 1205261 A GB1205261 A GB 1205261A GB 1205261 A GB1205261 A GB 1205261A GB 986421 A GB986421 A GB 986421A
Authority
GB
United Kingdom
Prior art keywords
flame
filter
increase
temperature
photo
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
GB1205261A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB986421A publication Critical patent/GB986421A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Radiation Pyrometers (AREA)

Abstract

986,421. Heat & flame sensing devices. M. CLAUSEN, [trading as DANFOSS VED, ING M. CLAUSEN]. April 4 1961 [March 31, 1960], No. 12052/61. Headings G1A. [Also in Division H1] A light-sensitive probe for a flame-detection system includes a thermally sensitive layer located between a photo-resistor and the flame for controlling the intensity of illumination incident on the detector. The arrangement is utilized to protect systems in which the increase in dark current due to a rise in temperature may erroneously give a flame present indication. As shown in Fig. 1, the casing of a photo-resistor 1 connected by wires 2 to a control circuit has an aperture 5 receiving light from a flame 3 via a filter 6 carried by a plate 7. The filter 6 is of a material such as Cu 2 Hg I 4 whose translucence is reduced by an increase in its temperature. The filter 6 may be replaced by, or combined with, a filter of which the spectral range is displaced from the most sensitive range of the detector with increase of temperature. In a modification, Fig. 2 (not shown), the photo-resistor is enclosed in a casing having its wall surfaces which are subjected to the incident light coated with a substance having decreasing translucence with increase in temperature.
GB1205261A 1960-03-31 1961-04-04 Improvements in or relating to light-sensitive probes Expired GB986421A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED33007A DE1189734B (en) 1960-03-31 1960-03-31 Photoelectric sensor, especially for flame guard

Publications (1)

Publication Number Publication Date
GB986421A true GB986421A (en) 1965-03-17

Family

ID=7041550

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1205261A Expired GB986421A (en) 1960-03-31 1961-04-04 Improvements in or relating to light-sensitive probes

Country Status (3)

Country Link
DE (1) DE1189734B (en)
DK (1) DK107049C (en)
GB (1) GB986421A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60501913A (en) * 1983-07-25 1985-11-07 クオンタム　グル−プ　インコ−ポレイテツド Photoelectric control device
EP0151611A4 (en) * 1983-07-25 1986-12-08 Quantum Group Inc Photovoltaic control systems.
US4906178A (en) * 1983-07-25 1990-03-06 Quantum Group, Inc. Self-powered gas appliance

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH129624A (en) * 1927-12-09 1929-01-02 Hartmann & Braun Ag Radiation pyrometer.
US2418845A (en) * 1944-03-15 1947-04-15 Comb Control Corp Optical safety device
CH253676A (en) * 1947-03-09 1948-03-31 Oertli W Ag Flame monitoring devices for firing systems, in particular for oil firing systems.
FR996822A (en) * 1949-08-24 1951-12-27 Home security appliance
DE950817C (en) * 1951-05-18 1956-10-18 Robert Girerd Arrangement for displaying and / or measuring the changes in a physical quantity
DE961218C (en) * 1955-03-18 1957-04-04 Johann Jost Reeh Measuring device for registering low temperature radiation
US2911456A (en) * 1955-11-23 1959-11-03 Volochine Theodore Pyrometer
DE1805334U (en) * 1959-06-23 1960-02-04 Siemens Ag RADIATION PYROMETERS WITH THERMOCOUPLES FOR TEMPERATURE MEASUREMENTS IN STOVE OVENS.

Also Published As

Publication number Publication date
DK107049C (en) 1967-04-17
DE1189734B (en) 1965-03-25

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