GB674084A - Improvements in electrically tripped switches - Google Patents
Improvements in electrically tripped switchesInfo
- Publication number
- GB674084A GB674084A GB19202/49A GB1920249A GB674084A GB 674084 A GB674084 A GB 674084A GB 19202/49 A GB19202/49 A GB 19202/49A GB 1920249 A GB1920249 A GB 1920249A GB 674084 A GB674084 A GB 674084A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contact
- stop
- plunger
- blade
- toggle
- 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
-
- 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
-
- 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
- H01H2071/109—Operating or release mechanisms with provisions for selecting between automatic or manual reset
Landscapes
- Breakers (AREA)
- Design And Manufacture Of Integrated Circuits (AREA)
- Control Of Resistance Heating (AREA)
- Switch Cases, Indication, And Locking (AREA)
Abstract
674,084. Thermal switches; snap-action switches. CRABTREE & CO., Ltd., J. A. June 22, 1950. [July 21, 1949] No. 19202/49. Class 38 (v). A switch which is opened on overload by thermal releases, such as those of Specification 624,581, has means which are adjustable to enable the contacts to be reset either automatically or manually. The trip-bar d of the releases a acts on a spring blade e riveted at g to a channelled member f, the other end of the blade e engaging V-notches h<SP>2</SP> in a member h so as to form a toggle, the other end of member h being pivoted to a blade spring i having an end hooked into an aperture l<SP>1</SP> in a resetting blade l. The latter is riveted at m to a fixed bracket n, and has a forked end to receive the rivet g. The upper bent-over end of member f is also hooked into aperture l<SP>1</SP>. Normally, the blade l presses the centre of the toggle to the right, Fig. 1, so that a contact o carried by spring i engages a fixed contact o<SP>1</SP>. On overload, the toggle is moved over-centre, Fig. 2, and contact o moves to the right until arrested by a stop s<SP>1</SP>, the position of which is adjustable by rotation of a plunger r having a cam which can engage the stop as claimed in Specification 674,119. In the Fig. 1 position, the cam r<SP>1</SP> is disengaged from the stop which prevents excessive movement of contact o which can thus be reset automatically by blade l. If the cam is rotated, the stop is moved to a position, Fig. 2, wherein the contact moves so far to the right that the toggle cannot return automatically, the contacts being reclosed by depression of the plunger so as to release the cam from the stop which moves to the Fig. 1 position, taking contact o with it. The plunger has a rib (not shown) co-operating with a fixed projection to prevent rotation of the plunger without initial depression thereof. A contact 6 carried by the plunger co-operates with fixed contacts n<SP>2</SP>, 7, respectively connected to contact o.and a terminal 2, so that the circuit may be broken by depression of the plunger. The stop is connected to a pilot lamp which is lit when the stop is engaged by the contact o. Specification 609,143 also is referred to.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB24681/51A GB674119A (en) | 1949-07-21 | 1949-07-21 | Improvements in electrically tripped switches |
GB19202/49A GB674084A (en) | 1949-07-21 | 1949-07-21 | Improvements in electrically tripped switches |
US415932A US2688674A (en) | 1949-07-21 | 1954-03-12 | Electric switch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB19202/49A GB674084A (en) | 1949-07-21 | 1949-07-21 | Improvements in electrically tripped switches |
Publications (1)
Publication Number | Publication Date |
---|---|
GB674084A true GB674084A (en) | 1952-06-18 |
Family
ID=10125439
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB19202/49A Expired GB674084A (en) | 1949-07-21 | 1949-07-21 | Improvements in electrically tripped switches |
GB24681/51A Expired GB674119A (en) | 1949-07-21 | 1949-07-21 | Improvements in electrically tripped switches |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB24681/51A Expired GB674119A (en) | 1949-07-21 | 1949-07-21 | Improvements in electrically tripped switches |
Country Status (2)
Country | Link |
---|---|
US (1) | US2688674A (en) |
GB (2) | GB674084A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2891128A (en) * | 1958-01-09 | 1959-06-16 | Adrian Medert | Thermostatic controls |
DE7910663U1 (en) * | 1979-04-11 | 1983-12-08 | Siemens AG, 1000 Berlin und 8000 München | Protection relay |
-
1949
- 1949-07-21 GB GB19202/49A patent/GB674084A/en not_active Expired
- 1949-07-21 GB GB24681/51A patent/GB674119A/en not_active Expired
-
1954
- 1954-03-12 US US415932A patent/US2688674A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
GB674119A (en) | 1952-06-18 |
US2688674A (en) | 1954-09-07 |
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