GB1022611A - Means for preventing unauthorised interference with electrically operated machines - Google Patents

Means for preventing unauthorised interference with electrically operated machines

Info

Publication number
GB1022611A
GB1022611A GB1058361A GB1058361A GB1022611A GB 1022611 A GB1022611 A GB 1022611A GB 1058361 A GB1058361 A GB 1058361A GB 1058361 A GB1058361 A GB 1058361A GB 1022611 A GB1022611 A GB 1022611A
Authority
GB
United Kingdom
Prior art keywords
switch
electrically operated
solenoid
operated machines
preventing unauthorised
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
GB1058361A
Inventor
Percival Denison
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.)
G H Gledhill & Sons Ltd
Original Assignee
G H Gledhill & Sons 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 G H Gledhill & Sons Ltd filed Critical G H Gledhill & Sons Ltd
Priority to GB1058361A priority Critical patent/GB1022611A/en
Publication of GB1022611A publication Critical patent/GB1022611A/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
    • H01H3/02—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/12—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by voltage falling below a predetermined value, e.g. for no-volt protection

Landscapes

  • Lock And Its Accessories (AREA)

Abstract

1,022,611. Protective arrangements. G. H. GLEDHILL & SONS Ltd. March 23, 1962 [March 23, 1961], No. 10583/61. Heading H2H. In order to prevent unauthorized interference with an electrically operated machine incorporating time indicating means the switch 15 for controlling the machine is operated by way of a solenoid 10 the armature 12 of which is arranged to operate the switch 15 when the solenoid is energized, the energization thereof being initiated by manual operation of a second switch 17, all the apparatus being enclosed in a lockable casing. Thus should the supply be removed for any reason, re-energization of the solenoid 10 by operation of the switch 17 can only be made by an authorized person having a key to the casing.
GB1058361A 1961-03-23 1961-03-23 Means for preventing unauthorised interference with electrically operated machines Expired GB1022611A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1058361A GB1022611A (en) 1961-03-23 1961-03-23 Means for preventing unauthorised interference with electrically operated machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1058361A GB1022611A (en) 1961-03-23 1961-03-23 Means for preventing unauthorised interference with electrically operated machines

Publications (1)

Publication Number Publication Date
GB1022611A true GB1022611A (en) 1966-03-16

Family

ID=9970507

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1058361A Expired GB1022611A (en) 1961-03-23 1961-03-23 Means for preventing unauthorised interference with electrically operated machines

Country Status (1)

Country Link
GB (1) GB1022611A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2140988A (en) * 1983-05-25 1984-12-05 Bedfordshire County Council Power supply control unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2140988A (en) * 1983-05-25 1984-12-05 Bedfordshire County Council Power supply control unit

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