GB274770A - Improvements in and relating to electric switches - Google Patents

Improvements in and relating to electric switches

Info

Publication number
GB274770A
GB274770A GB975427A GB975427A GB274770A GB 274770 A GB274770 A GB 274770A GB 975427 A GB975427 A GB 975427A GB 975427 A GB975427 A GB 975427A GB 274770 A GB274770 A GB 274770A
Authority
GB
United Kingdom
Prior art keywords
contacts
switch
springs
action
closed
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
GB975427A
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.)
EASTERN LAB Inc
Original Assignee
EASTERN LAB Inc
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 EASTERN LAB Inc filed Critical EASTERN LAB Inc
Priority to GB975427A priority Critical patent/GB274770A/en
Publication of GB274770A publication Critical patent/GB274770A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/18—Movable parts; Contacts mounted thereon
    • H01H21/22—Operating parts, e.g. handle
    • H01H21/24—Operating parts, e.g. handle biased to return to normal position upon removal of operating force
    • H01H21/26—Operating parts, e.g. handle biased to return to normal position upon removal of operating force adapted for operation by a part of the human body other than the hand, e.g. by foot

Landscapes

  • Slide Switches (AREA)
  • Eye Examination Apparatus (AREA)

Abstract

274,770. Croad, A. K. (Eastern Laboratories, Inc.). April 19, 1926. Retractive switches; switches, quick-action; contacts.-A pedal-operated switch has an actuating lever 4 pivoted in a bracket 1 and connected by a pin and slot connection to a switch arm 5 pivoted in a bracket 2 and carrying at its free ends 6 contacts 7 joined by a member 28 so that they bridge fixed contacts 11 when the switch is closed. Tension springs 10 are connected between the members 4, 5 in such a manner that the switch is opened and closed with a quick action and that when in the closed position (Fig. 2) on removing pressure from the operating pedal the switch is automatically moved to its inoperative position as shown in Fig. 1. The contacts 7 are adjustably mounted in their holders, being carried by stems 24 sliding through insulating sockets 23 and pressed downwardly by springs 25. Their relative movement under the action of these springs is limited by nuts 26 which are adjusted so that the contacts in opening remain in engagement until the lost-motion between members 4, 5 has been taken up and the springs 10 have crossed their dead-centre position.
GB975427A 1926-04-19 1926-04-19 Improvements in and relating to electric switches Expired GB274770A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB975427A GB274770A (en) 1926-04-19 1926-04-19 Improvements in and relating to electric switches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB975427A GB274770A (en) 1926-04-19 1926-04-19 Improvements in and relating to electric switches

Publications (1)

Publication Number Publication Date
GB274770A true GB274770A (en) 1927-07-19

Family

ID=9878132

Family Applications (1)

Application Number Title Priority Date Filing Date
GB975427A Expired GB274770A (en) 1926-04-19 1926-04-19 Improvements in and relating to electric switches

Country Status (1)

Country Link
GB (1) GB274770A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2155240A (en) * 1984-02-17 1985-09-18 Craig & Derricott Limited Electrical switches

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2155240A (en) * 1984-02-17 1985-09-18 Craig & Derricott Limited Electrical switches

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