GB717881A - Improvements in and relating to overload protected electric switches - Google Patents
Improvements in and relating to overload protected electric switchesInfo
- Publication number
- GB717881A GB717881A GB15143/52A GB1514352A GB717881A GB 717881 A GB717881 A GB 717881A GB 15143/52 A GB15143/52 A GB 15143/52A GB 1514352 A GB1514352 A GB 1514352A GB 717881 A GB717881 A GB 717881A
- Authority
- GB
- United Kingdom
- Prior art keywords
- block
- plunger
- spring
- fingers
- depressions
- 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
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/22—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release
- H01H73/30—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release reset by push-button, pull-knob or slide
Landscapes
- Breakers (AREA)
- Push-Button Switches (AREA)
- Thermally Actuated Switches (AREA)
Abstract
717,881. Automatic circuit-breakers. MECHANICAL PRODUCTS, Inc. June 16, 1952 [Oct. 24, 1951], No. 15143/52. Class 38(5). An overload-released switch comprises a plunger 30 having a button 33 slidable in a block 34 and urged by a spring 42 and having at the other end forks 31 slidable in cavities 46 on either side of a block 50 secured to the bottom of the casing 10. A hollow insulating block 18 carrying the moving contacts 14 on spring arms 16 and slidably mounted on the plunger 30 has fixed thereto an inverted U-shaped bimetal latch 20 serially connected between the arms 16 and normally engaging an abutment 60 on the plunger under the action of springs 61, in which condition outwardly biased spring fingers 56 fixed to the plunger by a rivet 58, are stressed inwardly by the hollow interior of the block 18, Figs. II, III. Depressions 59 in the free ends of the fingers 56 are thus held within similar depressions 54 in the block 50 and the switch is held closed. On overload the latch 20 leaves the abutment 60 and springs 61 open the contacts, also the block 18 leaves the fingers 56 which spring outwardly, Fig. IV, and permit the spring 42 to eject the plunger, whereby the latch 20, 60 is reset and the fingers 56 are stressed inwardly within the block 18. Hence when the button 33 is depressed to close the switch, the depressions 59 snap into the depressions 54 to assist in the final movement of the contacts 14 and hold the contacts 12, 14 engaged. Specification 711,881 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US252909A US2645691A (en) | 1951-10-24 | 1951-10-24 | Snap action electric switch with overload protection |
Publications (1)
Publication Number | Publication Date |
---|---|
GB717881A true GB717881A (en) | 1954-11-03 |
Family
ID=22958055
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB15143/52A Expired GB717881A (en) | 1951-10-24 | 1952-06-16 | Improvements in and relating to overload protected electric switches |
Country Status (7)
Country | Link |
---|---|
US (1) | US2645691A (en) |
CH (1) | CH308366A (en) |
DE (1) | DE968304C (en) |
ES (1) | ES205818A1 (en) |
FR (1) | FR1059149A (en) |
GB (1) | GB717881A (en) |
NL (2) | NL80601C (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2912546A (en) * | 1958-05-02 | 1959-11-10 | Texas Instruments Inc | Electrical switch structures |
DE1788140B1 (en) * | 1961-03-28 | 1973-03-29 | Arrow Hart Inc | OVERCURRENT SWITCH |
US3217125A (en) * | 1961-06-07 | 1965-11-09 | Wood Electric Corp | Circuit breaker having a cam means for very rapid opening of the contacts |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE649003C (en) * | 1934-12-21 | 1937-08-12 | Aeg | Installation self-switch with a push-button latch release |
US2255330A (en) * | 1941-06-05 | 1941-09-09 | Bulldog Electric Prod Co | Switch |
US2485736A (en) * | 1945-06-16 | 1949-10-25 | Mechanical Products Inc | Switch |
US2458807A (en) * | 1945-07-16 | 1949-01-11 | Hopax Ind Inc | Thermostatic switch |
US2438186A (en) * | 1946-01-25 | 1948-03-23 | Stewart Warner Corp | Time-delay switch |
-
0
- NL NLAANVRAGE7200449,A patent/NL171551B/en unknown
- NL NL80601D patent/NL80601C/xx active
-
1951
- 1951-10-24 US US252909A patent/US2645691A/en not_active Expired - Lifetime
-
1952
- 1952-06-16 GB GB15143/52A patent/GB717881A/en not_active Expired
- 1952-06-20 FR FR1059149D patent/FR1059149A/en not_active Expired
- 1952-07-06 DE DEM14678A patent/DE968304C/en not_active Expired
- 1952-07-09 CH CH308366D patent/CH308366A/en unknown
- 1952-10-15 ES ES0205818A patent/ES205818A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL171551B (en) | |
CH308366A (en) | 1955-07-15 |
US2645691A (en) | 1953-07-14 |
ES205818A1 (en) | 1953-03-01 |
NL80601C (en) | |
DE968304C (en) | 1958-02-06 |
FR1059149A (en) | 1954-03-23 |
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