GB385283A - Improvements in or relating to electrothermic switches - Google Patents
Improvements in or relating to electrothermic switchesInfo
- Publication number
- GB385283A GB385283A GB8231/31A GB823131A GB385283A GB 385283 A GB385283 A GB 385283A GB 8231/31 A GB8231/31 A GB 8231/31A GB 823131 A GB823131 A GB 823131A GB 385283 A GB385283 A GB 385283A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- screw
- current supply
- lever
- windings
- 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
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/46—Thermally-sensitive members actuated due to expansion or contraction of a solid
- H01H37/50—Thermally-sensitive members actuated due to expansion or contraction of a solid with extensible wires under tension
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Thermally Actuated Switches (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
385,283. Thermal switches. ROZUMEK, E., 1, Am Fenn, Steglitz, Berlin. March 17, 1931, No. 8231. Convention date, March 18, 1930. Void [Published under Sect. 91 of the Acts]. [Class 38 (v).] A thermal switch of the hot wire type comprises a current supply bar 1 which carries a fixed contact 3 and is connected to and insulated from a second current supply bar 2 having a pivot 5 for a lever 6 carrying a contact 4. The lower end of the bar 2 carries a stirrup 9 to which is attached the lower end of a wire expansion winding 8, the upper end of which is attached to two straps 10. The lower ends of the straps 10 carry the lower end of a second winding, the upper end of which is attached by a pin to a stirrup 11 having a screw 12 which engages the contact-lever 6. When the windings expand on heating, their expansions are added and the screw 12 is raised to allow the switch to close under the action of a spring 7. A coiled compression spring surrounds the screw 12 and serves to keep the windings taut after the switch is closed. The screw 12 has a cylindrical end sliding in a hole in the lever 6 to prevent disengagement due to further heating after the switch is closed. In a modification, the two windings are mounted separately on each side of the current supply bars. The switch is mounted in an evacuated container and a flat condenser may be mounted between the current supply bars.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE354020X | 1929-07-01 | ||
DE385283X | 1930-03-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB385283A true GB385283A (en) | 1932-12-22 |
Family
ID=31888927
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB19989/30A Expired GB354020A (en) | 1929-07-01 | 1930-07-01 | Improvements in and relating to electrothermally operated electric vacuum switches |
GB8231/31A Expired GB385283A (en) | 1929-07-01 | 1931-03-17 | Improvements in or relating to electrothermic switches |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB19989/30A Expired GB354020A (en) | 1929-07-01 | 1930-07-01 | Improvements in and relating to electrothermally operated electric vacuum switches |
Country Status (4)
Country | Link |
---|---|
US (1) | US1923509A (en) |
BE (1) | BE377134A (en) |
FR (1) | FR698135A (en) |
GB (2) | GB354020A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3025373A (en) * | 1956-08-29 | 1962-03-13 | Bryant Electric Co | Relay |
US3493910A (en) * | 1966-12-16 | 1970-02-03 | Penn Controls | Hot wire type spring motor actuator for switches |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2644870A (en) * | 1951-04-14 | 1953-07-07 | Ira E Mccabe | Electric switch of the mercury type |
US2809253A (en) * | 1952-11-28 | 1957-10-08 | G V Controls Inc | Electrical control devices |
US3004129A (en) * | 1958-07-14 | 1961-10-10 | Sunbeam Corp | Thermal responsive device |
US3127489A (en) * | 1962-04-16 | 1964-03-31 | Frank J Wallace | Thermally responsive switch |
-
0
- BE BE377134D patent/BE377134A/xx unknown
-
1930
- 1930-06-24 US US463506A patent/US1923509A/en not_active Expired - Lifetime
- 1930-06-27 FR FR698135D patent/FR698135A/en not_active Expired
- 1930-07-01 GB GB19989/30A patent/GB354020A/en not_active Expired
-
1931
- 1931-03-17 GB GB8231/31A patent/GB385283A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3025373A (en) * | 1956-08-29 | 1962-03-13 | Bryant Electric Co | Relay |
US3493910A (en) * | 1966-12-16 | 1970-02-03 | Penn Controls | Hot wire type spring motor actuator for switches |
Also Published As
Publication number | Publication date |
---|---|
BE377134A (en) | |
US1923509A (en) | 1933-08-22 |
FR698135A (en) | 1931-01-27 |
GB354020A (en) | 1931-08-06 |
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