GB612656A - Improvements in or relating to electrical delay devices - Google Patents

Improvements in or relating to electrical delay devices

Info

Publication number
GB612656A
GB612656A GB1628146A GB1628146A GB612656A GB 612656 A GB612656 A GB 612656A GB 1628146 A GB1628146 A GB 1628146A GB 1628146 A GB1628146 A GB 1628146A GB 612656 A GB612656 A GB 612656A
Authority
GB
United Kingdom
Prior art keywords
circuit
strip
bimetallic strip
contacts
armature
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
GB1628146A
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 GB1628146A priority Critical patent/GB612656A/en
Publication of GB612656A publication Critical patent/GB612656A/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

Landscapes

  • Thermally Actuated Switches (AREA)

Abstract

612,656. Switching systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., and ROSEBY, P. N. May 29, 1946, No. 16281. [Class 38 (iv)] [Also in Group XXXVII] In a combined electromagnetic and thermal device, contacts 32, 33, 34 are actuated for a period of time during which a thermal element heats up and cools down. On closing a contact device (not shown) between leads 43, 44 Fig. 3, circuit is completed from a source S through the relay coil 15 and the heating winding 25 of a bimetallic strip. The armature 18 is immediately attracted and by bearing on a roller 23 moves a strip 21 into engagement with a strip 22, thereby completing a maintaining circuit for the coil 15 and winding 25. The bimetallic strip 22 is also moved so as to operate the contact 33 by means of a buffer 31. The bimetallic strip is now heated and bends to the right till after a time the strips 21, 22 separate breaking the circuit of the electromagnet and the heater 25 so that the armature immediately returns to its original position and the bimetallic strip 22 bends back slowly, restoring the contacts 32, 33, 34 when it has reached its original position. The invention may be applied to the signalling system disclosed in Specification 593,378, [Group XXXVII], a preliminary signal of superposed high-frequency current initiating the operation and the switch 33 serving to open the initiating circuit and to connect up equipment for responding to the main signal during the delay period.
GB1628146A 1946-05-29 1946-05-29 Improvements in or relating to electrical delay devices Expired GB612656A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1628146A GB612656A (en) 1946-05-29 1946-05-29 Improvements in or relating to electrical delay devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1628146A GB612656A (en) 1946-05-29 1946-05-29 Improvements in or relating to electrical delay devices

Publications (1)

Publication Number Publication Date
GB612656A true GB612656A (en) 1948-11-16

Family

ID=10074488

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1628146A Expired GB612656A (en) 1946-05-29 1946-05-29 Improvements in or relating to electrical delay devices

Country Status (1)

Country Link
GB (1) GB612656A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2160017A (en) * 1984-06-05 1985-12-11 Inertia Switch Ltd Electrical switches

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2160017A (en) * 1984-06-05 1985-12-11 Inertia Switch Ltd Electrical switches

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