GB2322449B - Detecting pressure changes - Google Patents

Detecting pressure changes

Info

Publication number
GB2322449B
GB2322449B GB9701908A GB9701908A GB2322449B GB 2322449 B GB2322449 B GB 2322449B GB 9701908 A GB9701908 A GB 9701908A GB 9701908 A GB9701908 A GB 9701908A GB 2322449 B GB2322449 B GB 2322449B
Authority
GB
United Kingdom
Prior art keywords
pressure changes
detecting pressure
detecting
changes
pressure
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 - Lifetime
Application number
GB9701908A
Other versions
GB2322449A (en
GB9701908D0 (en
Inventor
David Laurence Melton
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB9701908A priority Critical patent/GB2322449B/en
Publication of GB9701908D0 publication Critical patent/GB9701908D0/en
Publication of GB2322449A publication Critical patent/GB2322449A/en
Application granted granted Critical
Publication of GB2322449B publication Critical patent/GB2322449B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0089—Transmitting or indicating the displacement of pistons by electrical, electromechanical, magnetic or electromagnetic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/14—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means involving the displacement of magnets, e.g. electromagnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/247—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow the switch being of the reed switch type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
    • H01R13/6683—Structural association with built-in electrical component with built-in electronic circuit with built-in sensor

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Measuring Fluid Pressure (AREA)
GB9701908A 1997-01-30 1997-01-30 Detecting pressure changes Expired - Lifetime GB2322449B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9701908A GB2322449B (en) 1997-01-30 1997-01-30 Detecting pressure changes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9701908A GB2322449B (en) 1997-01-30 1997-01-30 Detecting pressure changes

Publications (3)

Publication Number Publication Date
GB9701908D0 GB9701908D0 (en) 1997-03-19
GB2322449A GB2322449A (en) 1998-08-26
GB2322449B true GB2322449B (en) 2001-07-18

Family

ID=10806824

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9701908A Expired - Lifetime GB2322449B (en) 1997-01-30 1997-01-30 Detecting pressure changes

Country Status (1)

Country Link
GB (1) GB2322449B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202004012769U1 (en) 2004-08-14 2004-10-14 Huber, Erich Electrical switching component with differential pressure switch
DE102010028857B4 (en) * 2010-05-11 2012-03-22 Fiwarec Valves & Regulators Gmbh & Co. Kg Automatic fire extinguishing system
US10466124B2 (en) * 2016-12-19 2019-11-05 Kidde Technologies, Inc. In-situ functionality test feature for advance pneumatic detector

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3916130A (en) * 1974-03-29 1975-10-28 Houdaille Industries Inc Pressure switch for a sump pump
US3924086A (en) * 1974-03-27 1975-12-02 Robertshaw Controls Co Pressure responsive magnetic switch
WO1981002062A1 (en) * 1980-01-08 1981-07-23 Varian Techtron Pty Ltd Fluid pressure monitoring device
US4371753A (en) * 1976-12-21 1983-02-01 Graf Ronald E Miniature fluid-controlled switch
US4393713A (en) * 1980-01-27 1983-07-19 Mecilec Digital pressure-measuring device
US4533908A (en) * 1981-12-09 1985-08-06 Yasui Sangyo Co., Ltd. Warning means for a safety valve of a hydraulic power unit and a hydraulic power unit having the same
US4672231A (en) * 1986-01-14 1987-06-09 Texas Instruments Incorporated Control circuit particularly adapted for use with lubrication sensor apparatus
US5285652A (en) * 1993-04-08 1994-02-15 General Electric Company Sensor for pressure controlled switching valve for refrigeration system
US5490425A (en) * 1994-03-14 1996-02-13 Ferrofluidics Corporation Ferrofluid pressure sensor and warning device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3924086A (en) * 1974-03-27 1975-12-02 Robertshaw Controls Co Pressure responsive magnetic switch
US3916130A (en) * 1974-03-29 1975-10-28 Houdaille Industries Inc Pressure switch for a sump pump
US4371753A (en) * 1976-12-21 1983-02-01 Graf Ronald E Miniature fluid-controlled switch
WO1981002062A1 (en) * 1980-01-08 1981-07-23 Varian Techtron Pty Ltd Fluid pressure monitoring device
US4393713A (en) * 1980-01-27 1983-07-19 Mecilec Digital pressure-measuring device
US4533908A (en) * 1981-12-09 1985-08-06 Yasui Sangyo Co., Ltd. Warning means for a safety valve of a hydraulic power unit and a hydraulic power unit having the same
US4672231A (en) * 1986-01-14 1987-06-09 Texas Instruments Incorporated Control circuit particularly adapted for use with lubrication sensor apparatus
US5285652A (en) * 1993-04-08 1994-02-15 General Electric Company Sensor for pressure controlled switching valve for refrigeration system
US5490425A (en) * 1994-03-14 1996-02-13 Ferrofluidics Corporation Ferrofluid pressure sensor and warning device

Also Published As

Publication number Publication date
GB2322449A (en) 1998-08-26
GB9701908D0 (en) 1997-03-19

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)

Effective date: 20010820

732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Expiry date: 20170129