GB866841A - Improvements in or relating to float-operated electric switch mechanism - Google Patents

Improvements in or relating to float-operated electric switch mechanism

Info

Publication number
GB866841A
GB866841A GB3931358A GB3931358A GB866841A GB 866841 A GB866841 A GB 866841A GB 3931358 A GB3931358 A GB 3931358A GB 3931358 A GB3931358 A GB 3931358A GB 866841 A GB866841 A GB 866841A
Authority
GB
United Kingdom
Prior art keywords
magnet
keeper
float
contact
magnetic
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
GB3931358A
Inventor
Timothy Kay Dinsdale
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.)
Teddington Aircraft Controls Ltd
Original Assignee
Teddington Aircraft Controls 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 Teddington Aircraft Controls Ltd filed Critical Teddington Aircraft Controls Ltd
Priority to GB3931358A priority Critical patent/GB866841A/en
Publication of GB866841A publication Critical patent/GB866841A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/02—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding actuated by movement of a float carrying a magnet
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/64—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Abstract

866,841. Magnetic switches. TEDDING- TON AIRCRAFT CONTROLS Ltd. Dec. 4, 1959 [Dec. 5, 1958], No. 39313/58. Class 38 (5). [Also in Group XVIII] In a float - operated switch having a contactcarrying permanent magnet repelled by a second permanent magnet on the float, a magnetic keeper between the magnets causes snap-action movement of the contact carrying magnet. The hollow float 4 is slidable in a perforated tube 3 secured to a body 1 threaded at 2 for securement in a tank. Flexible spiders 9 secured at their periphery by insulating rings 10 clamped to the body 1, carry a cylindrical magnet 8 which is coaxial with and opposed to the magnet 7 carried by the float. A contact ring 14 insulated from and carried by the magnet 8 cooperates with fixed contacts 15, 16, 17 on segments 18, 19 clamped to but insulated from the body 1. A sealed cover 20 encloses the contact chamber which is separated from the tube 3 by a wall 12 of the body 1 and by a thin saturable magnetic keeper 13. The magnet 8 is normally attracted to the keeper 13 and as the magnet 7 moves nearer to the keeper so that the gap between the keeper and magnet 7 becomes less than the gap between the keeper and the magnet 8 (dependent on the thickness of the wall 12), the magnet 8 is rapidly repelled upwards to close the contacts. When the magnet 7 is moved downwards the attraction between the magnet 8 and the keeper ensures rapid contact opening. A ballast chamber 6 on the float 4 may be weighted to set the operating level.
GB3931358A 1958-12-05 1958-12-05 Improvements in or relating to float-operated electric switch mechanism Expired GB866841A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3931358A GB866841A (en) 1958-12-05 1958-12-05 Improvements in or relating to float-operated electric switch mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3931358A GB866841A (en) 1958-12-05 1958-12-05 Improvements in or relating to float-operated electric switch mechanism

Publications (1)

Publication Number Publication Date
GB866841A true GB866841A (en) 1961-05-03

Family

ID=10408884

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3931358A Expired GB866841A (en) 1958-12-05 1958-12-05 Improvements in or relating to float-operated electric switch mechanism

Country Status (1)

Country Link
GB (1) GB866841A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2162690A (en) * 1984-08-02 1986-02-05 Lucas Electrical Electronics A Magnetic switch for fluid level monitor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2162690A (en) * 1984-08-02 1986-02-05 Lucas Electrical Electronics A Magnetic switch for fluid level monitor

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