GB377315A - Improvements in or relating to variable electrical resistance devices - Google Patents
Improvements in or relating to variable electrical resistance devicesInfo
- Publication number
- GB377315A GB377315A GB1256631A GB1256631A GB377315A GB 377315 A GB377315 A GB 377315A GB 1256631 A GB1256631 A GB 1256631A GB 1256631 A GB1256631 A GB 1256631A GB 377315 A GB377315 A GB 377315A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistance
- wire
- elements
- granular
- resistance elements
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C10/00—Adjustable resistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C10/00—Adjustable resistors
- H01C10/16—Adjustable resistors including plural resistive elements
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Adjustable Resistors (AREA)
- Contacts (AREA)
Abstract
377,315. Variable resistances ; coatings and deposits ; sets of, and wire, resistances. GRAMOPHONE CO., Ltd., Hayes, Middlesex, and WHITE, J., 26, Connaught Gardens, Palmer's Green, London. April 28, 1931, No. 12566. [Class 37.] A variable electric resistance comprises resistance elements 1, 2 having different resistivities, and widths or cross-sectional areas which vary along their length, the widths or cross sections of adjacent elements at their surface of interconnection being proportional to their resistance per unit length at that surface. The elements 1, 2 may be of granular resistance material such as granular carbon with or without a graphite binding possessing different resistivities. The resistance elements are mounted on the frusto-conical base 3 of a hard cylindrical insulating container 4 and a wiper 7 is attached to a spindle 6, the end 8 of the wiper 7 bearing on a resilient disc 9 which makes contact with the entire width of the part of the resistance under the end 8. The granular resistance elements may be formed by applying a colloidal suspension of graphite to strips of paper or other fibrous supports, which are dried and then cut into the desired shape. The resistance elements may be formed of wire of metals or alloys having different resistivities and tapered sections, in which case the wire may be wound in a helical groove on a cylindrical member and sliding contact established by a brush, or the wire may be wound on a flexible strip of insulating material which may be bent to form an arc on which a rotatable contact arm, with or without an interposed resilient contact disc, may bear.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1256631A GB377315A (en) | 1931-04-28 | 1931-04-28 | Improvements in or relating to variable electrical resistance devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1256631A GB377315A (en) | 1931-04-28 | 1931-04-28 | Improvements in or relating to variable electrical resistance devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB377315A true GB377315A (en) | 1932-07-28 |
Family
ID=10007002
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1256631A Expired GB377315A (en) | 1931-04-28 | 1931-04-28 | Improvements in or relating to variable electrical resistance devices |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB377315A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2511807A (en) * | 1950-06-13 | Variable resistor | ||
US2938184A (en) * | 1957-11-26 | 1960-05-24 | Reeves Instrument Corp | Exponential potentiometer |
US3111639A (en) * | 1960-09-27 | 1963-11-19 | Zeiss Ikon Ag | Non-linear control potentiometer provided with a semi-conductive resistance layer |
US4283704A (en) * | 1978-05-18 | 1981-08-11 | Alps Electric Co., Ltd. | Variable resistor |
-
1931
- 1931-04-28 GB GB1256631A patent/GB377315A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2511807A (en) * | 1950-06-13 | Variable resistor | ||
US2938184A (en) * | 1957-11-26 | 1960-05-24 | Reeves Instrument Corp | Exponential potentiometer |
US3111639A (en) * | 1960-09-27 | 1963-11-19 | Zeiss Ikon Ag | Non-linear control potentiometer provided with a semi-conductive resistance layer |
US4283704A (en) * | 1978-05-18 | 1981-08-11 | Alps Electric Co., Ltd. | Variable resistor |
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