GB702588A - Improvements in or relating to light responsive devices for controlling electrical circuits - Google Patents

Improvements in or relating to light responsive devices for controlling electrical circuits

Info

Publication number
GB702588A
GB702588A GB6856/52A GB685652A GB702588A GB 702588 A GB702588 A GB 702588A GB 6856/52 A GB6856/52 A GB 6856/52A GB 685652 A GB685652 A GB 685652A GB 702588 A GB702588 A GB 702588A
Authority
GB
United Kingdom
Prior art keywords
plates
switch
march
relating
points
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
GB6856/52A
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.)
Svenska AB Gasaccumulator
Original Assignee
Svenska AB Gasaccumulator
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 Svenska AB Gasaccumulator filed Critical Svenska AB Gasaccumulator
Publication of GB702588A publication Critical patent/GB702588A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/38—Radiation pyrometry, e.g. infrared or optical thermometry using extension or expansion of solids or fluids
    • G01J5/40—Radiation pyrometry, e.g. infrared or optical thermometry using extension or expansion of solids or fluids using bimaterial elements

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Thermally Actuated Switches (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Abstract

702,588. Thermal switches. SVENSKA AKTIEBOLAGET GASACCUMULATOR. March 17, 1952 [March 20, 1951], No. 6856/52. Class 38(5) A micro switch 5 is arranged between a pair of rectangular bi-metal plates 1, 2 and is normally held closed thereby. Plate 1 is made light-absorptive and plate 2 light-reflective so that on a certain increase of illumination, the centres of the plates deflect downwardly to different extents so that the' switch is opened. The plates 1, 2 are supported at their corners by points 3 against which they are pressed by clamps 4. The points 3 are mounted on spacing blocks 9 carried by blade springs 10 on supports 11. In order to equalize the resilience of individual plates, a spring 12 may be used. Ambient temperature changes cause equal downward deflection of plates 1 and 2 so that the switch is not operated. The whole device is enclosed in a transparent housing.
GB6856/52A 1951-03-20 1952-03-17 Improvements in or relating to light responsive devices for controlling electrical circuits Expired GB702588A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE702588X 1951-03-20

Publications (1)

Publication Number Publication Date
GB702588A true GB702588A (en) 1954-01-20

Family

ID=20315515

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6856/52A Expired GB702588A (en) 1951-03-20 1952-03-17 Improvements in or relating to light responsive devices for controlling electrical circuits

Country Status (4)

Country Link
US (1) US2689889A (en)
FR (1) FR1052504A (en)
GB (1) GB702588A (en)
NL (1) NL76283C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3618970A1 (en) * 1986-06-05 1987-12-10 Odo Dipl Ing Thom Differential thermostat

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB178254A (en) * 1921-02-15 1922-04-20 Gen Electric Improvements in and relating to photosensitive devices
US1461523A (en) * 1922-09-15 1923-07-10 American Gasaccumulator Co Light-controlled means for opening and closing an electric circuit
US2063997A (en) * 1930-10-22 1936-12-15 Safety Car Heating & Lighting System and apparatus for circuit controlling
US2367059A (en) * 1941-02-10 1945-01-09 Penn Electric Switch Co Burner control system
US2598808A (en) * 1948-04-24 1952-06-03 Ledin Sven Harald Heating apparatus and radiation relay therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3618970A1 (en) * 1986-06-05 1987-12-10 Odo Dipl Ing Thom Differential thermostat

Also Published As

Publication number Publication date
NL76283C (en)
FR1052504A (en) 1954-01-25
US2689889A (en) 1954-09-21

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