GB624598A - Improvements in trip mechanism of automatic circuit breakers and similar electrical switchgear - Google Patents

Improvements in trip mechanism of automatic circuit breakers and similar electrical switchgear

Info

Publication number
GB624598A
GB624598A GB22582/47A GB2258247A GB624598A GB 624598 A GB624598 A GB 624598A GB 22582/47 A GB22582/47 A GB 22582/47A GB 2258247 A GB2258247 A GB 2258247A GB 624598 A GB624598 A GB 624598A
Authority
GB
United Kingdom
Prior art keywords
cap
blade
casing
screw
boss
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
GB22582/47A
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
Priority to BE484373D priority Critical patent/BE484373A/xx
Application filed by JA Crabtree and Co Ltd filed Critical JA Crabtree and Co Ltd
Priority to GB2258547A priority patent/GB624599A/en
Priority to GB22582/47A priority patent/GB624598A/en
Priority to US42494A priority patent/US2523897A/en
Priority to FR970308D priority patent/FR970308A/en
Priority to US43824A priority patent/US2606062A/en
Priority to DEP20502A priority patent/DE896677C/en
Publication of GB624598A publication Critical patent/GB624598A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H01H71/162—Electrothermal mechanisms with bimetal element with compensation for ambient temperature

Landscapes

  • Breakers (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

624,598. Automatic circuit breakers. CRABTREE & CO., Ltd., J. A., BESAG, E., HILL, W. E., and WINTLE, T. D. G. Aug. 14, 1947, No. 22582. [Class 38(v)] The thermal overload trip mechanism of a circuit-breaker suitable for motor control is provided with readily-adjustable, ambient-temperature compensating means comprising a bimetal blade e freely supported in the stem n<SP>2</SP> of a screw n adjustable in the casing c during manufacture, the blade e being further adjustable in use by a cam d on a rotatable knurled cap a to vary the distance x between the blade and a trip bar m. The screw n is held in an arcuate thread o by a spring blade p pressing against a shoulder c<SP>3</SP> of the casing, a clip r then being sprung into position over the screw to prevent access to it and to retain the casing-cover h. The cap a is rotatable on a boss b, and a bowed spring i retained by the boss presses against the cap to retain it in the set position, rotation of the cap being limited by a projection on it engaging a stop c' on the boss. The cap carries a sleeve f bearing markings which co-operate with a pointer g on the cover h.
GB22582/47A 1947-08-14 1947-08-14 Improvements in trip mechanism of automatic circuit breakers and similar electrical switchgear Expired GB624598A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
BE484373D BE484373A (en) 1947-08-14
GB2258547A GB624599A (en) 1947-08-14 1947-08-14 Improvements in thermal overload release devices for automatic circuit breakers
GB22582/47A GB624598A (en) 1947-08-14 1947-08-14 Improvements in trip mechanism of automatic circuit breakers and similar electrical switchgear
US42494A US2523897A (en) 1947-08-14 1948-08-04 Thermal overload release device for automatic circuit breakers
FR970308D FR970308A (en) 1947-08-14 1948-08-11 Circuit breaker
US43824A US2606062A (en) 1947-08-14 1948-08-12 Ambient temperature compensating means for automatic circuit breakers
DEP20502A DE896677C (en) 1947-08-14 1948-11-04 Overcurrent circuit breaker with thermal release

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB22582/47A GB624598A (en) 1947-08-14 1947-08-14 Improvements in trip mechanism of automatic circuit breakers and similar electrical switchgear

Publications (1)

Publication Number Publication Date
GB624598A true GB624598A (en) 1949-06-13

Family

ID=10181750

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22582/47A Expired GB624598A (en) 1947-08-14 1947-08-14 Improvements in trip mechanism of automatic circuit breakers and similar electrical switchgear

Country Status (5)

Country Link
US (2) US2523897A (en)
BE (1) BE484373A (en)
DE (1) DE896677C (en)
FR (1) FR970308A (en)
GB (1) GB624598A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2851556A (en) * 1956-01-09 1958-09-09 Square D Co Ambient temperature compensated relay
US2872548A (en) * 1955-12-01 1959-02-03 Fed Pacific Electric Co Motor starters

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB674085A (en) * 1949-07-21 1952-06-18 Crabtree & Co Ltd J A Improvements in and connected with thermal overload release devices for electric contactors or automatic circuit breakers
US3235683A (en) * 1961-04-12 1966-02-15 Beeman Lyle Air compressor control mechanism
GB1182811A (en) * 1966-03-23 1970-03-04 Matsushita Electric Ind Co Ltd Toasting Period Control Devices for Automatic Toasters.
US4891621A (en) * 1989-02-21 1990-01-02 Eaton Corporation Ambient compensator for thermal overload relay

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL27585C (en) *
DE568250C (en) * 1926-06-09 1933-01-16 Aeg Device for the protection of electrical equipment
US2155233A (en) * 1932-01-25 1939-04-18 Milwaukee Gas Specialty Co Control system
US2029980A (en) * 1933-05-26 1936-02-04 Besag Ernst Releasing arrangement for electric switches
GB440413A (en) * 1933-06-21 1935-12-23 Schiele & Bruchsaler Ind Werke Improvements in or relating to thermally operated release devices for automatic electric switches
GB436589A (en) * 1934-04-05 1935-10-07 John Ashworth Crabtree Improvements relating to the overload release arrangements of automatic switches or circuit breakers
US2171273A (en) * 1936-12-24 1939-08-29 Honeywell Regulator Co Adjustable thermostatic switch
AT155942B (en) * 1937-03-01 1939-04-11 Schiele Industriewerke Multipole circuit breaker.
US2295463A (en) * 1940-08-03 1942-09-08 Micro Switch Corp Thermostat
GB543191A (en) * 1940-08-12 1942-02-13 Crabtree & Co Ltd J A Improvements in and connected with moving contact carriers for automatically released electric switches

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2872548A (en) * 1955-12-01 1959-02-03 Fed Pacific Electric Co Motor starters
US2851556A (en) * 1956-01-09 1958-09-09 Square D Co Ambient temperature compensated relay

Also Published As

Publication number Publication date
US2606062A (en) 1952-08-05
DE896677C (en) 1953-11-16
BE484373A (en)
FR970308A (en) 1951-01-03
US2523897A (en) 1950-09-26

Similar Documents

Publication Publication Date Title
GB828754A (en) Pushbutton-operated overload switch
ES374717A1 (en) Circuit breaker with improved trip means
GB624598A (en) Improvements in trip mechanism of automatic circuit breakers and similar electrical switchgear
GB1021430A (en) Indicator for circuit interrupter
GB994368A (en) Improvements in electric circuit breaker
GB869424A (en) Improvements in or relating to current interrupting devices
GB555879A (en) Improvements in or relating to means for adjusting inaccessible elements
GB844635A (en) Improvements in or relating to snap-acting thermostatic switches
GB686739A (en) Improvements in handle-operated electric motor starting switches
GB994364A (en) Improvements in electric circuit breaker
GB837906A (en) Automatic electric cut-out
GB898533A (en) Improvements in or relating to thermally operated electric circuit breakers
GB634701A (en) Improvements in automatic electric circuit breakers having thermal overload release units
GB418361A (en) Improvements in or relating to automatic circuit-breakers
GB690263A (en) Improvements in or relating to control apparatus
GB661360A (en) Improved electric circuit overload protective device
GB1097913A (en) Overload tripping device for an automatic circuit breaker
GB426281A (en) Improvements in, or relating to, automatic circuit-breakers
GB384946A (en) Overload circuit breaker with thermal release device and variable resistance connected in parallel
GB755790A (en) Improvements relating to ignition distributors embodying a contact breaker device
GB1500526A (en) Electric circuit interrupting device
GB962930A (en) Electric circuit breaker
SU140910A1 (en) Thermorelay
GB709086A (en) Improvements in and relating to automatic electric circuit breakers
GB609143A (en) Improvements in and relating to the trip mechanism of automatic circuit breakers andsimilar electrical switchgear