GB563841A - Improvements in and relating to electric switches suitable for electric discharge lamps - Google Patents
Improvements in and relating to electric switches suitable for electric discharge lampsInfo
- Publication number
- GB563841A GB563841A GB7697/43A GB769743A GB563841A GB 563841 A GB563841 A GB 563841A GB 7697/43 A GB7697/43 A GB 7697/43A GB 769743 A GB769743 A GB 769743A GB 563841 A GB563841 A GB 563841A
- Authority
- GB
- United Kingdom
- Prior art keywords
- discharge lamps
- switch
- electric
- filaments
- action
- 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
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
- H01H19/60—Angularly-movable actuating part carrying no contacts
- H01H19/62—Contacts actuated by radial cams
Landscapes
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
563,841. Retractive switches. BRITISH THOMSON-HOUSTON CO., Ltd. May 14, 1943, No. 7697. Convention date, May 20, 1942. [Class 38 (v)] Particularly for starting electric discharge lamps a rotary switch is moved from a stable " off " position through another stable position closing one circuit, to a position against the action of a spring, in which more circuits are closed all through the action of cams on a central rotatable member 12 and spaced pairs of contacts 20, 35, 40 around it. On release of the handle the operating member returns to the second-mentioned stable position, which is shown in the Figure. Thus in the extended position, with all circuits closed, the filaments of, say, two discharge lamps are in series and the main switch is on. After a few seconds the switch is released, the series connection is broken, a glow discharge starts across the filaments and the main switch 20 remains on until manually opened.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US443701A US2387055A (en) | 1942-05-20 | 1942-05-20 | Electric switch for discharge lamps |
Publications (1)
Publication Number | Publication Date |
---|---|
GB563841A true GB563841A (en) | 1944-08-31 |
Family
ID=23761859
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7697/43A Expired GB563841A (en) | 1942-05-20 | 1943-05-14 | Improvements in and relating to electric switches suitable for electric discharge lamps |
Country Status (3)
Country | Link |
---|---|
US (1) | US2387055A (en) |
FR (1) | FR968643A (en) |
GB (1) | GB563841A (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2574308A (en) * | 1940-02-15 | 1951-11-06 | Landis & Gyr Ag | Multiple pole switch for tariff clocks |
US2537581A (en) * | 1946-05-07 | 1951-01-09 | Edwin G Gaynor | Socket and switch |
US2495266A (en) * | 1947-06-06 | 1950-01-24 | A L Smith Iron Company | Starter switch for fluorescent lamps |
US2617918A (en) * | 1948-10-18 | 1952-11-11 | William A Foster | Fluorescent lamp shade structure |
US2605367A (en) * | 1949-10-03 | 1952-07-29 | Clarence W Cochran | Electric switch for illuminating fixtures |
US2626334A (en) * | 1950-01-03 | 1953-01-20 | Cutler Hammer Inc | Electric switch |
US3012110A (en) * | 1959-07-10 | 1961-12-05 | Magnetic Devices Inc | Electrical circuit control switch |
US3400232A (en) * | 1966-09-30 | 1968-09-03 | Ford Motor Co | Multiple function circuit controller and circuit |
US3619520A (en) * | 1969-03-04 | 1971-11-09 | Emerson Electric Co | Ballast circuit and switch therefor |
US7597574B2 (en) * | 2006-08-11 | 2009-10-06 | Asm America, Inc. | Lamp fasteners for semiconductor processing reactors |
-
1942
- 1942-05-20 US US443701A patent/US2387055A/en not_active Expired - Lifetime
-
1943
- 1943-05-14 GB GB7697/43A patent/GB563841A/en not_active Expired
-
1947
- 1947-07-31 FR FR968643D patent/FR968643A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR968643A (en) | 1950-12-01 |
US2387055A (en) | 1945-10-16 |
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