GB178254A - Improvements in and relating to photosensitive devices - Google Patents

Improvements in and relating to photosensitive devices

Info

Publication number
GB178254A
GB178254A GB523321A GB523321A GB178254A GB 178254 A GB178254 A GB 178254A GB 523321 A GB523321 A GB 523321A GB 523321 A GB523321 A GB 523321A GB 178254 A GB178254 A GB 178254A
Authority
GB
United Kingdom
Prior art keywords
strips
relating
contacts
photosensitive devices
engagemen
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
GB523321A
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.)
General Electric Co
Original Assignee
General Electric 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 General Electric Co filed Critical General Electric Co
Priority to GB523321A priority Critical patent/GB178254A/en
Publication of GB178254A publication Critical patent/GB178254A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
    • H01H47/24—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil having light-sensitive input

Landscapes

  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

178,254. British Thomson - Houston Co., Ltd., (General Electric Co.). Feb. 15, 1921. Thermal switches.-A photo-sensitive switch, applicable for illuminating buoys at night, comprises a pair of bi-metallic strips 11, 12 one having a polished surface and the other blackened, contacts 13 on the strips being brought into engagemen when the apparatus is exposed to light, owing to unequal heating of the strips. Closure of the contacts energizes the device 17. The strips are carried on brackets on an insulating base 14 and are adjustable by screws 15.
GB523321A 1921-02-15 1921-02-15 Improvements in and relating to photosensitive devices Expired GB178254A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB523321A GB178254A (en) 1921-02-15 1921-02-15 Improvements in and relating to photosensitive devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB523321A GB178254A (en) 1921-02-15 1921-02-15 Improvements in and relating to photosensitive devices

Publications (1)

Publication Number Publication Date
GB178254A true GB178254A (en) 1922-04-20

Family

ID=9792200

Family Applications (1)

Application Number Title Priority Date Filing Date
GB523321A Expired GB178254A (en) 1921-02-15 1921-02-15 Improvements in and relating to photosensitive devices

Country Status (1)

Country Link
GB (1) GB178254A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2689889A (en) * 1951-03-20 1954-09-21 Gasaccumulator Svenska Ab Light responsive relay

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2689889A (en) * 1951-03-20 1954-09-21 Gasaccumulator Svenska Ab Light responsive relay

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