GB744714A - Improvements in or relating to thermally responsive electric devices for switching or switching and indicating - Google Patents

Improvements in or relating to thermally responsive electric devices for switching or switching and indicating

Info

Publication number
GB744714A
GB744714A GB29727/53A GB2972753A GB744714A GB 744714 A GB744714 A GB 744714A GB 29727/53 A GB29727/53 A GB 29727/53A GB 2972753 A GB2972753 A GB 2972753A GB 744714 A GB744714 A GB 744714A
Authority
GB
United Kingdom
Prior art keywords
blade
contact
cut
spring
hole
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
GB29727/53A
Other languages
English (en)
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB744714A publication Critical patent/GB744714A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
    • G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—Indicating faults in circuits or apparatus
    • H04M3/10—Providing fault- or trouble-signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fuses (AREA)
  • Scissors And Nippers (AREA)
GB29727/53A 1952-10-29 1953-10-27 Improvements in or relating to thermally responsive electric devices for switching or switching and indicating Expired GB744714A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE744714X 1952-10-29

Publications (1)

Publication Number Publication Date
GB744714A true GB744714A (en) 1956-02-15

Family

ID=20323200

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29727/53A Expired GB744714A (en) 1952-10-29 1953-10-27 Improvements in or relating to thermally responsive electric devices for switching or switching and indicating

Country Status (4)

Country Link
BE (1) BE523842A (enrdf_load_stackoverflow)
FR (1) FR1085707A (enrdf_load_stackoverflow)
GB (1) GB744714A (enrdf_load_stackoverflow)
NL (2) NL86509C (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
NL182243B (nl)
NL86509C (enrdf_load_stackoverflow)
BE523842A (enrdf_load_stackoverflow)
FR1085707A (fr) 1955-02-07

Similar Documents

Publication Publication Date Title
ES468351A1 (es) Interruptor electrico automatico bipolar.
GB856724A (en) Improvements in or relating to annunciators
DE3262238D1 (en) Contactor device with means for automatically breaking power circuits and with a local operating device
GB744714A (en) Improvements in or relating to thermally responsive electric devices for switching or switching and indicating
US2647969A (en) Electric switch
US2462212A (en) Protective switch
GB879669A (en) Improvements in or relating to electric switches
GB751489A (en) Improvements in and relating to electric snap-action switches
GB769506A (en) Snap action circuit breaker
GB1216977A (en) Improvements in and relating to electric circuit breakers
GB1096914A (en) Electrical contact arrangement
GB721435A (en) Improvements in or relating to electrical relays
GB784567A (en) Improvements in thermally operated overload circuit breakers
GB547270A (en) Improvement in thermo-responsive electric switches
GB1400155A (en) Electric circuit breakers
GB1478396A (en) Excess current switching device
GB1137435A (en) Improved device for tripping a circuit breaker
GB879813A (en) Improvements in and relating to electric switches
GB1091519A (en) Automatic electric circuit breaker
GB1259228A (enrdf_load_stackoverflow)
GB577654A (en) Improvements in or relating to protective devices for electrical apparatus
GB709114A (en) An improved thermal over-current electric circuit-breaker
GB493244A (en) Improvements in thermally actuated switches, relays and apparatus for fire detectionand like purposes
GB502712A (en) Improvements in, or relating to, overload release units for automatic circuit breakers and similar electrical switchgear
US3151320A (en) Alarm system with transferable indication