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GB848842A - Improvements relating to limit switches - Google Patents

Improvements relating to limit switches

Info

Publication number
GB848842A
GB848842A GB1741357A GB1741357A GB848842A GB 848842 A GB848842 A GB 848842A GB 1741357 A GB1741357 A GB 1741357A GB 1741357 A GB1741357 A GB 1741357A GB 848842 A GB848842 A GB 848842A
Authority
GB
United Kingdom
Prior art keywords
limit switches
improvements relating
radio
motor
houston
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
GB1741357A
Inventor
David Spencer Simons
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB1741357A priority Critical patent/GB848842A/en
Publication of GB848842A publication Critical patent/GB848842A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
    • B66B1/46—Adaptations of switches or switchgear
    • B66B1/50—Adaptations of switches or switchgear with operating or control mechanisms mounted in the car or cage or in the lift well or hoistway
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/16—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)

Abstract

848,842. Stopping lifts by radio-activity. BRITISH THOMSON - HOUSTON CO. Ltd. May 30, 1958.[May 31, 1957], No. 17413/57. Drawings to Specification. Class 40(3). A shaft winder system comprising at least one cage supported by one or more ropes driven by a winding motor through a drum is provided with a limit switch which operates to stop the motor when a shutter on the rope interrupts a radio-active beam normally falling on a detector.
GB1741357A 1957-05-31 1957-05-31 Improvements relating to limit switches Expired GB848842A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1741357A GB848842A (en) 1957-05-31 1957-05-31 Improvements relating to limit switches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1741357A GB848842A (en) 1957-05-31 1957-05-31 Improvements relating to limit switches

Publications (1)

Publication Number Publication Date
GB848842A true GB848842A (en) 1960-09-21

Family

ID=10094757

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1741357A Expired GB848842A (en) 1957-05-31 1957-05-31 Improvements relating to limit switches

Country Status (1)

Country Link
GB (1) GB848842A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4273973A (en) * 1979-12-17 1981-06-16 Bruins Roger C Automatic electric downrigger shut-off switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4273973A (en) * 1979-12-17 1981-06-16 Bruins Roger C Automatic electric downrigger shut-off switch

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