GB760970A - Snap action electric switches - Google Patents
Snap action electric switchesInfo
- Publication number
- GB760970A GB760970A GB5691/54A GB569154A GB760970A GB 760970 A GB760970 A GB 760970A GB 5691/54 A GB5691/54 A GB 5691/54A GB 569154 A GB569154 A GB 569154A GB 760970 A GB760970 A GB 760970A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- bar
- projection
- moving
- switch
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H35/00—Gearings or mechanisms with other special functional features
- F16H35/14—Mechanisms with only two stable positions, e.g. acting at definite angular positions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
- H01H5/04—Energy stored by deformation of elastic members
- H01H5/06—Energy stored by deformation of elastic members by compression or extension of coil springs
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermally Actuated Switches (AREA)
Abstract
760,970. Thermal switches. MIDLAND ELECTRIC MANUFACTURING CO., Ltd. Feb. 24, 1955 [Feb. 26, 1954], No. 5691/54. Class 38(5) A thermal snap action switch which is adapted so that the contacts may be reset automatically or manually includes a manually operated bar 25 which may move downwards in a recess 24 and which has two positions of rest, one at the top as shown in Fig. 1 and one midway down. A bimetallic strip 21 heated by an element 19 carries an operating piece 22. A toggle mechanism comprises an actuating member 11, a contact carrying member 10 (both pivoted on the member 8), and an overcentre spring 16. When the piece 22 moves to the left the member 11 turns anticlockwise and causes the member 10 to snap over to the right moving through the member 11, thereby opening the contacts. The member 11 returns to its original position under the action of spring 15 as the bimetal cools, but with the bar in its top position (as shown), the dead-centre line is not reached and the contacts remain set open. Movement of the bar downwards causes its sloping face to engage the projection 18 whereupon the member 10 snaps, back and closes the contacts. If however the bar 25 is initially set in its mid position, when the switch opens the projection 18 engages the bar and prevents the member 10 moving quite so far to the right, whereup as the bimetal cools and the member 11 returns to its original position the dead centre line is reached and the member 10 snaps back to close the contacts automatically. The contacts may also be opened by hand when the switch is closed by moving the bar. right down so that it engages the projection 17 on the member 11; the contacts closing again immediately on release. Figs. 4, 5 and 6 (not shown), show a plurality of similar switches in a bank, and also describe means for setting the bar 25 in its two positions.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5691/54A GB760970A (en) | 1954-02-26 | 1954-02-26 | Snap action electric switches |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5691/54A GB760970A (en) | 1954-02-26 | 1954-02-26 | Snap action electric switches |
Publications (1)
Publication Number | Publication Date |
---|---|
GB760970A true GB760970A (en) | 1956-11-07 |
Family
ID=9800832
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5691/54A Expired GB760970A (en) | 1954-02-26 | 1954-02-26 | Snap action electric switches |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB760970A (en) |
-
1954
- 1954-02-26 GB GB5691/54A patent/GB760970A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB739380A (en) | Improvements in or relating to automatic overload electric switches | |
GB1210102A (en) | Circuit interrupter | |
GB1472955A (en) | Excess current responsive switch | |
GB1399401A (en) | Electric switches | |
ES416155A1 (en) | Thermally responsive electrical device | |
GB1196797A (en) | Improvements in Current-Limiting Electric Circuit Breakers. | |
GB1243475A (en) | Molded-case electric circuit breaker with contact arm latch | |
GB1320474A (en) | Single or multi pole push button actuated excess current switch having thermal and or electromagnetic trip | |
GB819697A (en) | Improvements in operating mechanism for an electric circuit breaker | |
GB760970A (en) | Snap action electric switches | |
US2229981A (en) | Electric switch | |
US2516670A (en) | Electric switch | |
GB1103406A (en) | Manually reset thermally-responsive, electric, cut-out device | |
GB801978A (en) | Improvements in and relating to driving mechanisms for circuit-breakers | |
US2636958A (en) | Circuit breaker | |
GB1312153A (en) | Electric switch | |
GB464205A (en) | Improvements in and relating to thermally controlled electrical switches or circuit breakers | |
GB955587A (en) | Pushbutton operated electric circuit breaker | |
GB511656A (en) | Improvements in or relating to quick break electric switches | |
GB884814A (en) | Improvements in thermostatic switches | |
GB707569A (en) | Thermally, or electromagnetically, operable electric switches | |
GB1090933A (en) | Improvements in circuit breakers | |
FR1266897A (en) | Operating mechanism for an electrical switch with instantaneous on and off | |
SU6450A1 (en) | Clamping pushbutton switch with automatic opening device | |
ES249812U (en) | Thermal overload relay |