GB565996A - Improvements in or relating to electrical switching devices for alternating current circuits - Google Patents
Improvements in or relating to electrical switching devices for alternating current circuitsInfo
- Publication number
- GB565996A GB565996A GB890143A GB890143A GB565996A GB 565996 A GB565996 A GB 565996A GB 890143 A GB890143 A GB 890143A GB 890143 A GB890143 A GB 890143A GB 565996 A GB565996 A GB 565996A
- Authority
- GB
- United Kingdom
- Prior art keywords
- break
- strip
- magnet
- switch
- occur
- 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
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/56—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Thermally Actuated Switches (AREA)
Abstract
565,996. Thermal switches ; interrupters. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., ROSEBY, P. N., and McNIATH, H. J. June 3, 1943, No. 8901. [Class 38 (v)] The movable contact member 32 of an A.C. switch is held in the closed position by an electromagnet 33 included in the switch circuit so that when a force acting downwards at 40 against the action of the magnet and of a spring 35 tends to move the member 32 from engagement with its contact 38, the actual break will occur when the A.C. current is passing through the zero point of its cycle and a sparkless break will occur. The force at 40 may be produced by a bimetal strip 31 having a heating coil in series with the switch contacts and the magnet and the device then acts as an interrupter which may be used for controlling a hot plate, the ratio of make to break being adjustable. In a modification, Figs. 1-2 (not shown), the moving contact strip 32 is also influenced by two bowed springs having a dead-centre action and in another modification, Fig. 4 (not shown), a rotary cam acts on the strip 32 through an intermediate adjustable wedge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB890143A GB565996A (en) | 1943-06-03 | 1943-06-03 | Improvements in or relating to electrical switching devices for alternating current circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB890143A GB565996A (en) | 1943-06-03 | 1943-06-03 | Improvements in or relating to electrical switching devices for alternating current circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB565996A true GB565996A (en) | 1944-12-07 |
Family
ID=9861493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB890143A Expired GB565996A (en) | 1943-06-03 | 1943-06-03 | Improvements in or relating to electrical switching devices for alternating current circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB565996A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2784275A (en) * | 1953-06-01 | 1957-03-05 | Paragon Electric Company | Current interrupting switch |
| EP0103284A2 (en) * | 1982-09-10 | 1984-03-21 | Ranco Incorporated | Snap-action switch for alternating current |
-
1943
- 1943-06-03 GB GB890143A patent/GB565996A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2784275A (en) * | 1953-06-01 | 1957-03-05 | Paragon Electric Company | Current interrupting switch |
| EP0103284A2 (en) * | 1982-09-10 | 1984-03-21 | Ranco Incorporated | Snap-action switch for alternating current |
| EP0103284A3 (en) * | 1982-09-10 | 1986-10-15 | Ranco Incorporated | Snap-action switch for alternating current |
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