GB1143903A - Electrical switch - Google Patents
Electrical switchInfo
- Publication number
- GB1143903A GB1143903A GB1296267A GB1296267A GB1143903A GB 1143903 A GB1143903 A GB 1143903A GB 1296267 A GB1296267 A GB 1296267A GB 1296267 A GB1296267 A GB 1296267A GB 1143903 A GB1143903 A GB 1143903A
- Authority
- GB
- United Kingdom
- Prior art keywords
- strip
- contacts
- energization
- switch
- coil
- 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
- H01H61/01—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal mechanisms
- H01H71/16—Electrothermal mechanisms with bimetal element
Landscapes
- Manufacture Of Motors, Generators (AREA)
- Thermally Actuated Switches (AREA)
Abstract
1,143,903. Thermal switches. DANFOSS A.S. 20 March, 1967 [9 April, 1966], No. 12962/67. Heading H1N. Energization of a heating coil 9 causes contacts 1, 2 to close and after a delay to re-open. Two mutually opposed bimetal strips 5 and 6 are cantilever mounted end to end with the strip 5 being approximately twice as long as strip 6 to render contacts 1, 2 independent of ambient temperature. A thermal insulation layer 7 surrounds strip 5 so that strip 6 is rapidly heated to close the contacts 1, 2, and strip 5 is more slowly heated to provide subsequent opening of the contacts. On de-energization of coil 9, the more rapid cooling of strip 6 ensures that the contacts 1. 2 are not reclosed as strip 5 restores. The switch may be used to start a single-phase motor 11 by connecting the coil 9 in series with the running winding 12, and the contacts 1, 2 in series with a starting winding 11 to provide a short energization thereof. A plungeroperated switch (14, Fig. 2, not shown) actuated by excessive bending of strip 6 due to very high ambient temperature, may be provided as an overheat cut-out. Instead of contacts 1, 2 a snap-action switch (not described) may be actuated by the end of strip 5.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED0049833 | 1966-04-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1143903A true GB1143903A (en) | 1969-02-26 |
Family
ID=7052183
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1296267A Expired GB1143903A (en) | 1966-04-09 | 1967-03-20 | Electrical switch |
Country Status (5)
Country | Link |
---|---|
DE (1) | DE1590295A1 (en) |
DK (1) | DK115130B (en) |
FR (1) | FR1524411A (en) |
GB (1) | GB1143903A (en) |
NL (1) | NL6704782A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1061220B (en) * | 1976-03-18 | 1983-02-28 | Texas Instruments Italia Spa | IMPROVEMENT IN DOOR-LOCKING DEVICES FOR WASHING MACHINES AND SIMILAR OPERATION BY BIMETAL WITH VOLTMETRIC HEATING |
-
1966
- 1966-04-09 DE DE19661590295 patent/DE1590295A1/en active Pending
-
1967
- 1967-03-20 GB GB1296267A patent/GB1143903A/en not_active Expired
- 1967-04-04 NL NL6704782A patent/NL6704782A/xx unknown
- 1967-04-05 FR FR101660A patent/FR1524411A/en not_active Expired
- 1967-04-10 DK DK196767A patent/DK115130B/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE1590295A1 (en) | 1970-05-27 |
NL6704782A (en) | 1967-10-10 |
DK115130B (en) | 1969-09-08 |
FR1524411A (en) | 1968-05-10 |
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