GB704957A - Improvements in or relating to electric switches required to operate when an appliedforce reaches a predetermined magnitude - Google Patents

Improvements in or relating to electric switches required to operate when an appliedforce reaches a predetermined magnitude

Info

Publication number
GB704957A
GB704957A GB2486150A GB2486150A GB704957A GB 704957 A GB704957 A GB 704957A GB 2486150 A GB2486150 A GB 2486150A GB 2486150 A GB2486150 A GB 2486150A GB 704957 A GB704957 A GB 704957A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
position
contacts
magnetic
gust
switches
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
GB2486150A
Inventor
Robert Noel Claude Strain
Henry Warburton Hall
Alexander Morrison Maclennan
William Gerald Glendinning
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00Switches operated by change of a physical condition
    • H01H35/24Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding

Abstract

704,957. Partly magnetic switches; actuation of switches. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Dec. 19, 1951 [Oct. 11, 1950], No. 24861/50. Class 38(5) A switch responsive to changes in fluid pressure comprises an armature exposed directly to the fluid and movable from a rest position in which it is held by magnetic attraction through a neutral position to a second rest position in which it is held by a second magnetic attraction. In the form shown in Fig. 1, explosions of gases in closed vessels are detected by the gas lifting an armature 29, which has a bleed hole in its centre, away from a ring magnet 26 and towards magnets such as 36a in which latter position it bridges contacts 30a, 30b. Fig. 3 shows a gust detector switch for use in aircraft. A sudden. rise in air pressure in pipe 65 moves vanes 70, 71, 72 into their other position in which contacts 61, 62 are bridged instead of 60, 61, or vice versa. A horse shoe magnet 52 attracts either vane 70 or 71. Closure of contacts 61, 62 operates a gust alleviating device and also a slow relay which changes over contacts so as to make 60 alive and 62 dead, so that the next gust is also detected and alleviated.
GB2486150A 1950-10-11 1950-10-11 Improvements in or relating to electric switches required to operate when an appliedforce reaches a predetermined magnitude Expired GB704957A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2486150A GB704957A (en) 1950-10-11 1950-10-11 Improvements in or relating to electric switches required to operate when an appliedforce reaches a predetermined magnitude

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2486150A GB704957A (en) 1950-10-11 1950-10-11 Improvements in or relating to electric switches required to operate when an appliedforce reaches a predetermined magnitude

Publications (1)

Publication Number Publication Date
GB704957A true true GB704957A (en) 1954-03-03

Family

ID=10218403

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2486150A Expired GB704957A (en) 1950-10-11 1950-10-11 Improvements in or relating to electric switches required to operate when an appliedforce reaches a predetermined magnitude

Country Status (1)

Country Link
GB (1) GB704957A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131614A (en) * 1982-11-22 1984-06-20 Gen Electric Co Plc Electrical switch
GB2132020A (en) * 1982-11-22 1984-06-27 Gen Electric Pneumatic ball contact switch
US6815639B2 (en) 2000-03-31 2004-11-09 Illinois Tool Works Inc. Method and apparatus for receiving a universal input voltage in a welding, plasma or heating power source
WO2006048136A1 (en) * 2004-10-29 2006-05-11 Rohde & Schwarz Gmbh & Co. Kg Electric switching device comprising magnetic and/or fluidic adjusting elements

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131614A (en) * 1982-11-22 1984-06-20 Gen Electric Co Plc Electrical switch
GB2132020A (en) * 1982-11-22 1984-06-27 Gen Electric Pneumatic ball contact switch
US6815639B2 (en) 2000-03-31 2004-11-09 Illinois Tool Works Inc. Method and apparatus for receiving a universal input voltage in a welding, plasma or heating power source
US6987242B2 (en) 2000-03-31 2006-01-17 Illinois Tool Works Inc. Method and apparatus for receiving a universal input voltage in a welding, plasma or heating power source
US7235759B2 (en) 2000-03-31 2007-06-26 Illinois Tool Works Inc. Method and apparatus for receiving a universal input voltage in a welding, plasma or heating power source
WO2006048136A1 (en) * 2004-10-29 2006-05-11 Rohde & Schwarz Gmbh & Co. Kg Electric switching device comprising magnetic and/or fluidic adjusting elements

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