GB634701A - Improvements in automatic electric circuit breakers having thermal overload release units - Google Patents

Improvements in automatic electric circuit breakers having thermal overload release units

Info

Publication number
GB634701A
GB634701A GB28121/48A GB2812148A GB634701A GB 634701 A GB634701 A GB 634701A GB 28121/48 A GB28121/48 A GB 28121/48A GB 2812148 A GB2812148 A GB 2812148A GB 634701 A GB634701 A GB 634701A
Authority
GB
United Kingdom
Prior art keywords
electric circuit
circuit breakers
automatic electric
thermal overload
blade
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
GB28121/48A
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.)
ERNEST BESAG
JA Crabtree and Co Ltd
Original Assignee
ERNEST BESAG
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 ERNEST BESAG, JA Crabtree and Co Ltd filed Critical ERNEST BESAG
Publication of GB634701A publication Critical patent/GB634701A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7427—Adjusting only the electrothermal mechanism
    • 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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7427—Adjusting only the electrothermal mechanism
    • H01H71/7445—Poly-phase adjustment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H01H83/22—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being imbalance of two or more currents or voltages
    • H01H83/223—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being imbalance of two or more currents or voltages with bimetal elements

Landscapes

  • Breakers (AREA)

Abstract

634,701. Automatic circuit-breakers. CRABTREE & CO., Ltd., J. A., BESAG, E., HILL, W. E., and WINTLE, T. D. G. Jan. 27, 1948, No. 28121. Divided out of 624,581. [Class 38 (v)] An automatic circuit-breaker, such as that of Specification 624,581, has a spring-pressed plunger n between a trip bar a and a trip blade h, so as to prevent the latter from being overstressed in case of excessive movement of the thermally-responsive devices acting on the bar a. The end g of plunger n passes freely through an aperture v<SP>1</SP> in a blade r which is adjustably secured by a screw s to the bar a, so as to be able to vary the distance between the end of plunger n and the blade h.
GB28121/48A 1947-02-19 1948-01-27 Improvements in automatic electric circuit breakers having thermal overload release units Expired GB634701A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4915/47A GB624581A (en) 1947-02-19 1947-02-19 Improvements in automatic circuit breakers having thermal overload release units

Publications (1)

Publication Number Publication Date
GB634701A true GB634701A (en) 1950-03-29

Family

ID=9786251

Family Applications (2)

Application Number Title Priority Date Filing Date
GB4915/47A Expired GB624581A (en) 1947-02-19 1947-02-19 Improvements in automatic circuit breakers having thermal overload release units
GB28121/48A Expired GB634701A (en) 1947-02-19 1948-01-27 Improvements in automatic electric circuit breakers having thermal overload release units

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB4915/47A Expired GB624581A (en) 1947-02-19 1947-02-19 Improvements in automatic circuit breakers having thermal overload release units

Country Status (2)

Country Link
US (1) US2527907A (en)
GB (2) GB624581A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997032329A1 (en) * 1996-02-26 1997-09-04 Felten & Guilleaume Austria Ag Electrical safety switch

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2668205A (en) * 1951-10-31 1954-02-02 Ite Circuit Breaker Ltd Multipole circuit breaker
US2872548A (en) * 1955-12-01 1959-02-03 Fed Pacific Electric Co Motor starters

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1031836A (en) * 1911-06-05 1912-07-09 Willys Overland Co Safety-lock for relatively reciprocal members.
BE443183A (en) * 1937-08-20
BE433900A (en) * 1938-04-26
US2289108A (en) * 1940-11-15 1942-07-07 Micro Switch Corp Electric switch construction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997032329A1 (en) * 1996-02-26 1997-09-04 Felten & Guilleaume Austria Ag Electrical safety switch

Also Published As

Publication number Publication date
GB624581A (en) 1949-06-13
US2527907A (en) 1950-10-31

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