GB937207A - Improvements relating to electric cyclic control switches - Google Patents

Improvements relating to electric cyclic control switches

Info

Publication number
GB937207A
GB937207A GB3939359A GB3939359A GB937207A GB 937207 A GB937207 A GB 937207A GB 3939359 A GB3939359 A GB 3939359A GB 3939359 A GB3939359 A GB 3939359A GB 937207 A GB937207 A GB 937207A
Authority
GB
United Kingdom
Prior art keywords
switch
plate
cam
spring
bimetal
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
GB3939359A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB3939359A priority Critical patent/GB937207A/en
Publication of GB937207A publication Critical patent/GB937207A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/004—Mechanisms for operating contacts for operating contacts periodically
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H9/0207—Adjustable mounting of casings

Landscapes

  • Thermally Actuated Switches (AREA)

Abstract

937,207. Interrupters. C. S. DOUGLAS. Dec. 1, 1960 [Nov. 20, 1959], No. 39393/59. Class 38 (5). The relative durations of open and closed conditions of a cyclic switch for controlling input of energy to electrical appliances are varied by adjustment of the position of an otherwise-stationary switch unit with respect to a continuously running cam which acts on a switch-operating lever made of bimetal to compensate for changes in ambient temperature. In the embodiment of Fig. 1, a micro-switch 6 is pivoted at 5 on a plate 1 and its bimetal operating arm 7 is urged by a spring 9 into contact with a cam 3 driven by motor 2. Spring 9 also presses switch 6 against a screw 10 which is threaded in a bush 11 on plate 1 and is adjustable by a knob 12 with a pointer (not shown) moving over a scale 13. In another embodiment (Fig. 3), a motor 17 drives cam 18 to operate bimetal arm 27 of micro-switch 26 which is mounted on a plate 19 pivoted to a base-plate 16 at 20 and guided by pins 22 in slots 21. A spring 25 urges plate 19 counterclockwise with respect to plate 16 to engage a cam 23 thereon. Cam 23 is adjustable by spindle 24 to move plate 19, and hence switch 26, to vary the on/off ratio of the switch operation.
GB3939359A 1959-11-20 1959-11-20 Improvements relating to electric cyclic control switches Expired GB937207A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3939359A GB937207A (en) 1959-11-20 1959-11-20 Improvements relating to electric cyclic control switches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3939359A GB937207A (en) 1959-11-20 1959-11-20 Improvements relating to electric cyclic control switches

Publications (1)

Publication Number Publication Date
GB937207A true GB937207A (en) 1963-09-18

Family

ID=10409308

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3939359A Expired GB937207A (en) 1959-11-20 1959-11-20 Improvements relating to electric cyclic control switches

Country Status (1)

Country Link
GB (1) GB937207A (en)

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