GB1010201A - Light sensitive circuits - Google Patents

Light sensitive circuits

Info

Publication number
GB1010201A
GB1010201A GB643661A GB643661A GB1010201A GB 1010201 A GB1010201 A GB 1010201A GB 643661 A GB643661 A GB 643661A GB 643661 A GB643661 A GB 643661A GB 1010201 A GB1010201 A GB 1010201A
Authority
GB
United Kingdom
Prior art keywords
cell
amplifier
illuminated
lamp
light
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
GB643661A
Inventor
Henry Frederick Hartley
Peter Edmund Perera
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.)
Lucas Support Services Ltd
Original Assignee
Rotax Ltd
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 Rotax Ltd filed Critical Rotax Ltd
Priority to GB643661A priority Critical patent/GB1010201A/en
Publication of GB1010201A publication Critical patent/GB1010201A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
    • A23L3/26—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by irradiation without heating
    • A23L3/263—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by irradiation without heating with corpuscular or ionising radiation, i.e. X, alpha, beta or omega radiation

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Toxicology (AREA)
  • Nutrition Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

1,010,201. Light-sensitive circuits. ROTAX Ltd. Feb. 7, 1962 [Feb.22,1961], No. 6436/61. Heading G1A. [Also in Division H3] A light-sensitive circuit comprises an electronic amplifier such as a transisitor 4 connected across a D.C. supply in series with an electromagnetic device 6 and a lamp 5 and having a photoelectric cell 3 such as a phototransistor connected to its control terminal, the arrangement being such that when the photo-electric cell is not illuminated the amplifier is non-conductive but when the cell is illuminated current flows through the amplifier to illuminate the lamp. The lamp 5 when illuminated, being in close proximity to the cell increases the amount of light falling on the cell, this regenerative action causing the current flowing through the amplifier to build up to a value sufficient to operate the electromagnetic device 6. When the initial source of illumination is removed the control effected by the cell reduces the current flowing through the lamp until by degenerative action the amplifier ceases to conduct, and the electromagnetic device ceases to operate. A triode may be used in place of the transistor 4. The device 6 may be a solenoid used for tilting the driving mirror of a road vehicle when the mirror is illuminated by the headlamps of a following vehicle, or it may be used as an automatic parking or dipping switch for vehicles.
GB643661A 1961-02-22 1961-02-22 Light sensitive circuits Expired GB1010201A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB643661A GB1010201A (en) 1961-02-22 1961-02-22 Light sensitive circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB643661A GB1010201A (en) 1961-02-22 1961-02-22 Light sensitive circuits

Publications (1)

Publication Number Publication Date
GB1010201A true GB1010201A (en) 1965-11-17

Family

ID=9814446

Family Applications (1)

Application Number Title Priority Date Filing Date
GB643661A Expired GB1010201A (en) 1961-02-22 1961-02-22 Light sensitive circuits

Country Status (1)

Country Link
GB (1) GB1010201A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3388293A (en) * 1965-05-20 1968-06-11 Fabri Tek Inc Indicator lamp in a transistor emitter follower circuit with a lamp warmup resistor in parallel with the transistor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3388293A (en) * 1965-05-20 1968-06-11 Fabri Tek Inc Indicator lamp in a transistor emitter follower circuit with a lamp warmup resistor in parallel with the transistor

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