GB921262A - Improvements relating to variable resistors - Google Patents
Improvements relating to variable resistorsInfo
- Publication number
- GB921262A GB921262A GB6864/60A GB686460A GB921262A GB 921262 A GB921262 A GB 921262A GB 6864/60 A GB6864/60 A GB 6864/60A GB 686460 A GB686460 A GB 686460A GB 921262 A GB921262 A GB 921262A
- Authority
- GB
- United Kingdom
- Prior art keywords
- photo
- resistance
- conductive material
- hole
- variable
- 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
- 239000004020 conductor Substances 0.000 abstract 3
- 239000000839 emulsion Substances 0.000 abstract 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 abstract 1
- CJOBVZJTOIVNNF-UHFFFAOYSA-N cadmium sulfide Chemical compound [Cd]=S CJOBVZJTOIVNNF-UHFFFAOYSA-N 0.000 abstract 1
- 229910052980 cadmium sulfide Inorganic materials 0.000 abstract 1
- 229910052801 chlorine Inorganic materials 0.000 abstract 1
- 239000000460 chlorine Substances 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 239000011669 selenium Substances 0.000 abstract 1
- 229910052711 selenium Inorganic materials 0.000 abstract 1
- 239000010409 thin film Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F55/00—Radiation-sensitive semiconductor devices covered by groups H10F10/00, H10F19/00 or H10F30/00 being structurally associated with electric light sources and electrically or optically coupled thereto
- H10F55/20—Radiation-sensitive semiconductor devices covered by groups H10F10/00, H10F19/00 or H10F30/00 being structurally associated with electric light sources and electrically or optically coupled thereto wherein the electric light source controls the radiation-sensitive semiconductor devices, e.g. optocouplers
- H10F55/205—Radiation-sensitive semiconductor devices covered by groups H10F10/00, H10F19/00 or H10F30/00 being structurally associated with electric light sources and electrically or optically coupled thereto wherein the electric light source controls the radiation-sensitive semiconductor devices, e.g. optocouplers wherein the radiation-sensitive semiconductor devices have no potential barriers, e.g. photoresistors
- H10F55/208—Optical potentiometers
Landscapes
- Blocking Light For Cameras (AREA)
Abstract
921,262. Photo-electric devices. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Feb. 6, 1961 [Feb. 26, 1960], No. 6864/60. Class 40 (3). [Also in Group XXXVI] A variable resistor comprises a non-uniform light filter placed between a constant light source and a photo-conductive material so that the resistance between two terminals connected to the material is variable by relative movement of the filter. In Fig. 1, an opaque screen 5 with a hole or slit 6 is placed between electric light source 2 and a photo-conductive body 5 with terminals 8. A cylinder 9 consists of glass with a photographic emulsion coating of varying density situated opposite hole 6; cylinder 9 may be rotated by knob 10 to vary the intensity of light falling on body 7 and thus its resistance. The photo-conductive material may consist of selenium or cadmium sulphide, activated if desired with copper or chlorine, and may be a thin film, a sintered powder or a single crystal. In an alternative arrangement relative rotation of two polarized discs is used instead of the variable density emulsion. Two bodies of photo-conductive material may be used, each associated with a hole in the screen 5 and the associated filter element, the arrangement being such that turning knob 10 increases the resistance of one body while decreasing the resistance of the other thereby forming a potentiometer. Reference has been directed by the Comptroller to Specification 879,949.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB6864/60A GB921262A (en) | 1960-02-26 | 1960-02-26 | Improvements relating to variable resistors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB6864/60A GB921262A (en) | 1960-02-26 | 1960-02-26 | Improvements relating to variable resistors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB921262A true GB921262A (en) | 1963-03-20 |
Family
ID=9822157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6864/60A Expired GB921262A (en) | 1960-02-26 | 1960-02-26 | Improvements relating to variable resistors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB921262A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4459523A (en) * | 1983-03-11 | 1984-07-10 | Tipper Tie, Inc. | Motor speed control |
| WO1996008042A1 (en) * | 1994-09-05 | 1996-03-14 | Bloemen Joost Lodewijk Karel F | Digital potentiometer with a servo motor and an absolute optical position-encoder |
-
1960
- 1960-02-26 GB GB6864/60A patent/GB921262A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4459523A (en) * | 1983-03-11 | 1984-07-10 | Tipper Tie, Inc. | Motor speed control |
| WO1996008042A1 (en) * | 1994-09-05 | 1996-03-14 | Bloemen Joost Lodewijk Karel F | Digital potentiometer with a servo motor and an absolute optical position-encoder |
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