GB674084A - Improvements in electrically tripped switches - Google Patents

Improvements in electrically tripped switches

Info

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
Application number
GB19202/49A
Inventor
Ernst Besag
Thomas Daniel Guy Wintle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JA Crabtree and Co Ltd
Original Assignee
JA Crabtree and Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JA Crabtree and Co Ltd filed Critical JA Crabtree and Co Ltd
Priority to GB24681/51A priority Critical patent/GB674119A/en
Priority to GB19202/49A priority patent/GB674084A/en
Publication of GB674084A publication Critical patent/GB674084A/en
Priority to US415932A priority patent/US2688674A/en
Expired legal-status Critical Current

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.
GB19202/49A 1949-07-21 1949-07-21 Improvements in electrically tripped switches Expired GB674084A (en)

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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
GB674119A (en) 1952-06-18
US2688674A (en) 1954-09-07

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