GB575823A - Improvements in and relating to electric switches with electrodynamically-reinforcedcontact - Google Patents

Improvements in and relating to electric switches with electrodynamically-reinforcedcontact

Info

Publication number
GB575823A
GB575823A GB6805/44A GB680544A GB575823A GB 575823 A GB575823 A GB 575823A GB 6805/44 A GB6805/44 A GB 6805/44A GB 680544 A GB680544 A GB 680544A GB 575823 A GB575823 A GB 575823A
Authority
GB
United Kingdom
Prior art keywords
blade
contact
april
conductor
displaced position
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
GB6805/44A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB575823A publication Critical patent/GB575823A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force

Landscapes

  • Thermally Actuated Switches (AREA)

Abstract

575,823. Electromagnetic switches; thermal switches. BRITISH THOMSON-HOUSTON CO., Ltd. April 13, 1944, No. 6805. Convention date, April 16, 1943. [Class 38 (v)] A thermal switch consists of a contact 13 mounted on a blade 14 fixed to block 15 and biased towards contact 12. A conductor 16 is mounted alongside the blade 14 and connected in series therewith. Their currents are in the same direction and the resultant electromagnetic attraction holds the contacts together until the pressure from rod 21 on a bimetallic strip 19 acting on the blade causes them to separate with a snap action. In Fig. 2 (not shown) a second fixed contact and conductor are arranged on the opposite side of the blade, whereby the latter is held electromagnetically in the displaced position and an alternative connection to the outside circuit is thereby made. The conductors are of different resistances so that when the contact is in the displaced position there is a reduction in the current passing to the heater.
GB6805/44A 1943-04-16 1944-04-13 Improvements in and relating to electric switches with electrodynamically-reinforcedcontact Expired GB575823A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US575823XA 1943-04-16 1943-04-16

Publications (1)

Publication Number Publication Date
GB575823A true GB575823A (en) 1946-03-06

Family

ID=22011496

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6805/44A Expired GB575823A (en) 1943-04-16 1944-04-13 Improvements in and relating to electric switches with electrodynamically-reinforcedcontact

Country Status (1)

Country Link
GB (1) GB575823A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3162743A (en) * 1961-09-19 1964-12-22 Nettie R Mcilvaine Thermally actuated switch compensated for ambient temperature variations
EP0471893A2 (en) * 1990-08-21 1992-02-26 Siemens Aktiengesellschaft Contact spring set for high electrical currents
EP1061542A1 (en) * 1999-06-18 2000-12-20 Schneider Electric Industries SA Electromagnetic multipolar switch

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3162743A (en) * 1961-09-19 1964-12-22 Nettie R Mcilvaine Thermally actuated switch compensated for ambient temperature variations
EP0471893A2 (en) * 1990-08-21 1992-02-26 Siemens Aktiengesellschaft Contact spring set for high electrical currents
EP0471893A3 (en) * 1990-08-21 1992-08-05 Siemens Aktiengesellschaft Contact spring set for high electrical currents
EP1061542A1 (en) * 1999-06-18 2000-12-20 Schneider Electric Industries SA Electromagnetic multipolar switch

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