GB617674A - Improvements relating to clock controlled electric switches - Google Patents

Improvements relating to clock controlled electric switches

Info

Publication number
GB617674A
GB617674A GB3062046D GB3062046D GB617674A GB 617674 A GB617674 A GB 617674A GB 3062046 D GB3062046 D GB 3062046D GB 3062046 D GB3062046 D GB 3062046D GB 617674 A GB617674 A GB 617674A
Authority
GB
United Kingdom
Prior art keywords
switch
contacts
load
improvements relating
parallel
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
GB3062046D
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.)
EK Cole Ltd
Original Assignee
EK Cole 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 EK Cole Ltd filed Critical EK Cole Ltd
Priority to GB3062046D priority Critical patent/GB617674A/en
Publication of GB617674A publication Critical patent/GB617674A/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

  • Measurement Of Unknown Time Intervals (AREA)
  • Control Of Temperature (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

617,674. Switching systems. COLE, Ltd., E. K., and MARTIN, A. W. Oct. 15, 1946, No. 30620. [Class 38 (iv)] [Also in Group XXXVII] A time-controlled switch for connecting a load L to a source E comprises contacts S<SP>2</SP>, S<SP>1</SP> actuated by switch-on and switch-off cams C<SP>2</SP>, C<SP>1</SP>, both of the slow build-up and quick release type, a thermal switch S<SP>3</SP> being connected in parallel with the contacts S<SP>2</SP> and arranged to close a short time after the latter, so that no sparking occurs as the contacts S<SP>2</SP> slowly open. The heater T of the switch S<SP>3</SP> is de-energized when the contacts S<SP>1</SP> open and may alternatively be connected in parallel with the load L. One contact of the switch S<SP>3</SP> is carried by a bimetal strip and the co-operating contact may be similarly mounted to compensate for ambient temperature variation. The apparatus may be incorporated in an electric clock and control a radio receiver.
GB3062046D 1946-10-15 1946-10-15 Improvements relating to clock controlled electric switches Expired GB617674A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3062046D GB617674A (en) 1946-10-15 1946-10-15 Improvements relating to clock controlled electric switches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3062046D GB617674A (en) 1946-10-15 1946-10-15 Improvements relating to clock controlled electric switches

Publications (1)

Publication Number Publication Date
GB617674A true GB617674A (en) 1949-02-09

Family

ID=10310508

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3062046D Expired GB617674A (en) 1946-10-15 1946-10-15 Improvements relating to clock controlled electric switches

Country Status (1)

Country Link
GB (1) GB617674A (en)

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