GB546777A - Improvements in or relating to electrically operated timing devices - Google Patents

Improvements in or relating to electrically operated timing devices

Info

Publication number
GB546777A
GB546777A GB770141A GB770141A GB546777A GB 546777 A GB546777 A GB 546777A GB 770141 A GB770141 A GB 770141A GB 770141 A GB770141 A GB 770141A GB 546777 A GB546777 A GB 546777A
Authority
GB
United Kingdom
Prior art keywords
circuit
closure
contact
contacts
bimetal strip
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
GB770141A
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.)
JOHN RUSSELL TAYLOR
Cutler Hammer Europe Ltd
Original Assignee
JOHN RUSSELL TAYLOR
Igranic 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 JOHN RUSSELL TAYLOR, Igranic Electric Co Ltd filed Critical JOHN RUSSELL TAYLOR
Priority to GB770141A priority Critical patent/GB546777A/en
Publication of GB546777A publication Critical patent/GB546777A/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

  • Thermally Actuated Switches (AREA)

Abstract

546,777. Thermal switches. IGRANIC ELECTRIC CO., Ltd., TAYLOR. J. R., and WRIGHT, S. R. June 18. 1941, No. 7701. [Class 38 (v)] In a timing device wherein closure of a switch 1 is followed after a given time interval by the closure of a circuit 2, closure of the switch 1 completes the circuit to the heater 4 of a thermal element such as a bimetal strip 3 which thereupon bends till it engages a contact 5 completing the circuit to a relay w which closes maintaining contacts c<SP>2</SP> and other contacts c' and opens contacts c<SP>3</SP>. The circuit of the heater 4 is thus broken, the bimetal strip 3 cools and eventually re-engages a contact 6 to complete the circuit 2. The time interval is thus the time during which the bimetal strip heats up and then cools down. The contact 5 may be an eccentrically-mounted disc and the load 2 may be a relay which can operate to close a maintaining circuit for 'itself and can open or close other circuits to control other operations. The arrangement may be used to start or stop a motor after a given time.
GB770141A 1941-06-18 1941-06-18 Improvements in or relating to electrically operated timing devices Expired GB546777A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB770141A GB546777A (en) 1941-06-18 1941-06-18 Improvements in or relating to electrically operated timing devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB770141A GB546777A (en) 1941-06-18 1941-06-18 Improvements in or relating to electrically operated timing devices

Publications (1)

Publication Number Publication Date
GB546777A true GB546777A (en) 1942-07-29

Family

ID=9838118

Family Applications (1)

Application Number Title Priority Date Filing Date
GB770141A Expired GB546777A (en) 1941-06-18 1941-06-18 Improvements in or relating to electrically operated timing devices

Country Status (1)

Country Link
GB (1) GB546777A (en)

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