GB707288A - Improvements in electrical switching devices for effecting timed operation - Google Patents

Improvements in electrical switching devices for effecting timed operation

Info

Publication number
GB707288A
GB707288A GB159253A GB159253A GB707288A GB 707288 A GB707288 A GB 707288A GB 159253 A GB159253 A GB 159253A GB 159253 A GB159253 A GB 159253A GB 707288 A GB707288 A GB 707288A
Authority
GB
United Kingdom
Prior art keywords
switching devices
electrical switching
timed operation
effecting timed
effecting
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
GB159253A
Inventor
John Francis Mackenzie
Arthur Smith
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric 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 Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB159253A priority Critical patent/GB707288A/en
Publication of GB707288A publication Critical patent/GB707288A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
    • H01H43/30—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action
    • H01H43/301—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material
    • H01H43/302—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material of solid bodies
    • H01H43/304—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material of solid bodies of two bodies expanding or contracting in a different manner, e.g. bimetallic elements

Landscapes

  • Devices For Supply Of Signal Current (AREA)
  • Telephonic Communication Services (AREA)

Abstract

707,288. Partly electromagnetic switches. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd. Aug. 14, 1951 [Aug. 26, 1950], No. 1592/53. Divided out of 707,231. Drawings to Specifications. Class 38(5) The subject-matter of this Specification is included in the Specification 707,231, but the claims differ. Specification 525,840 also is referred to.
GB159253A 1950-08-26 1950-08-26 Improvements in electrical switching devices for effecting timed operation Expired GB707288A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB159253A GB707288A (en) 1950-08-26 1950-08-26 Improvements in electrical switching devices for effecting timed operation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB159253A GB707288A (en) 1950-08-26 1950-08-26 Improvements in electrical switching devices for effecting timed operation

Publications (1)

Publication Number Publication Date
GB707288A true GB707288A (en) 1954-04-14

Family

ID=9724621

Family Applications (1)

Application Number Title Priority Date Filing Date
GB159253A Expired GB707288A (en) 1950-08-26 1950-08-26 Improvements in electrical switching devices for effecting timed operation

Country Status (1)

Country Link
GB (1) GB707288A (en)

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