GB1010201A - Light sensitive circuits - Google Patents
Light sensitive circuitsInfo
- 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
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.
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)
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 |
-
1961
- 1961-02-22 GB GB643661A patent/GB1010201A/en not_active Expired
Cited By (1)
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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