GB274194A - Improvements in or relating to control means for multiple-way electric circuit devices - Google Patents
Improvements in or relating to control means for multiple-way electric circuit devicesInfo
- Publication number
- GB274194A GB274194A GB997626A GB997626A GB274194A GB 274194 A GB274194 A GB 274194A GB 997626 A GB997626 A GB 997626A GB 997626 A GB997626 A GB 997626A GB 274194 A GB274194 A GB 274194A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- lamps
- quick
- wedge
- 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
- H01H61/00—Electrothermal relays
- H01H61/06—Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts
Landscapes
- Thermal Transfer Or Thermal Recording In General (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
274,194. Ollerenshaw, R. E. April 15, 1926. Thermal switches; switches, quick-action.-A switching-device for controlling an illuminated sign comprises a thermal element, e.g. a bimetallic strip 23, carrying a switch arm 31 adapted to engage in succession a series of contacts 32 - - 35 connected to lamps 2 - - 5. The device is combined with a quick-action interrupter 15, 8, in such a manner that after the lamps have been lit one after the other they are all extinguished simultaneously. With the parts in the position shown in Fig. 3, current flows through lamp 1 heating winding 25, and contacts 15, 8. The strip 23 becomes hot and bends downwards stressing a spring blade 28 on a lever 12, which is prevented from moving by the engagement of the member 8 with a spring-mounted wedge 10, and causing the arm 31 to engage successively the adjustable contacts 32 - - 35. Eventually the member 8 slips over the wedge 10 and the parts move rapidly into the position shown in Fig. 4 in which the circuit to all the lamps is broken at the contacts 15, 8. The strip 23 then cools and returns the parts into their original position. An arrangement is provided for shunting a portion of the heating winding 25. In a modification, the forked member 12 acts on a bowed spring which takes the place of the wedge 10 in providing a quick action. The member 23 may also be flexible instead of the member 28.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB997626A GB274194A (en) | 1926-04-15 | 1926-04-15 | Improvements in or relating to control means for multiple-way electric circuit devices |
FR625473D FR625473A (en) | 1926-04-15 | 1926-11-30 | Improvements to control means for multiple electrical circuit devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB997626A GB274194A (en) | 1926-04-15 | 1926-04-15 | Improvements in or relating to control means for multiple-way electric circuit devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB274194A true GB274194A (en) | 1927-07-15 |
Family
ID=9882237
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB997626A Expired GB274194A (en) | 1926-04-15 | 1926-04-15 | Improvements in or relating to control means for multiple-way electric circuit devices |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR625473A (en) |
GB (1) | GB274194A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2402346A (en) * | 2003-06-04 | 2004-12-08 | Peter Roy Howell | Portable electric warming device |
-
1926
- 1926-04-15 GB GB997626A patent/GB274194A/en not_active Expired
- 1926-11-30 FR FR625473D patent/FR625473A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2402346A (en) * | 2003-06-04 | 2004-12-08 | Peter Roy Howell | Portable electric warming device |
Also Published As
Publication number | Publication date |
---|---|
FR625473A (en) | 1927-08-11 |
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