GB895748A - Improvements relating to relay apparatus - Google Patents

Improvements relating to relay apparatus

Info

Publication number
GB895748A
GB895748A GB497459A GB497459A GB895748A GB 895748 A GB895748 A GB 895748A GB 497459 A GB497459 A GB 497459A GB 497459 A GB497459 A GB 497459A GB 895748 A GB895748 A GB 895748A
Authority
GB
United Kingdom
Prior art keywords
magnetic
filter
magnet
operate
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
Application number
GB497459A
Inventor
Norman Lee
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.)
Keelavite Co Ltd
Original Assignee
Keelavite 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 Keelavite Co Ltd filed Critical Keelavite Co Ltd
Priority to GB497459A priority Critical patent/GB895748A/en
Priority to ES0255387A priority patent/ES255387A1/en
Priority to FR817532A priority patent/FR1247205A/en
Publication of GB895748A publication Critical patent/GB895748A/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/06—Filters making use of electricity or magnetism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/143—Filter condition indicators
    • 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
    • H01H35/32—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by bellows
    • 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
    • H01H35/40—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by devices allowing continual flow of fluid, e.g. vane

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Relay Circuits (AREA)
  • Measuring Fluid Pressure (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Abstract

895,748. Filters. KEELAVITE CO. Ltd. Jan. 11, 1960 [Feb. 12, 1959], No. 4974/59. Class 46. [Also in Groups XXXV and XXXVII] A device which is sensitive to the pressure across a filter 20 to operate an indicator or control switch 32 when the filter is blocked comprises a spring-loaded magnetic armature 27 which moves when a magnet 26 is forced away from magnetic inserts 24, 25 in a wall 2 by a pressure sensitive bellows 7. The armature 27 is mounted on a lever 28 pivoted at 31, and when the magnetic circuit is broken by retraction of the magnet 26, it moves with snap-action under the action of spring 30 to operate the switch. Resetting may be automatic or by manual means 33. Magnetic material is excluded from the pressure side of the bellows by a magnetic filter 35.
GB497459A 1959-02-12 1959-02-12 Improvements relating to relay apparatus Expired GB895748A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB497459A GB895748A (en) 1959-02-12 1959-02-12 Improvements relating to relay apparatus
ES0255387A ES255387A1 (en) 1959-02-12 1960-01-29 Improvements relating to relay apparatus
FR817532A FR1247205A (en) 1959-02-12 1960-02-04 Improvements to electromagnetic relay control devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB497459A GB895748A (en) 1959-02-12 1959-02-12 Improvements relating to relay apparatus

Publications (1)

Publication Number Publication Date
GB895748A true GB895748A (en) 1962-05-09

Family

ID=9787385

Family Applications (1)

Application Number Title Priority Date Filing Date
GB497459A Expired GB895748A (en) 1959-02-12 1959-02-12 Improvements relating to relay apparatus

Country Status (3)

Country Link
ES (1) ES255387A1 (en)
FR (1) FR1247205A (en)
GB (1) GB895748A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3250873A (en) * 1964-03-20 1966-05-10 Marvel Eng Co Filter signal
US3301141A (en) * 1964-10-20 1967-01-31 Fairchild Hiller Corp Magnetically damped pneumatic control devices
US3335694A (en) * 1964-09-04 1967-08-15 Dwyer Mfg Co F W Bistable magnetic pressure indicator
US3412706A (en) * 1965-04-09 1968-11-26 Bowser Inc Differential pressure indicator
US3442248A (en) * 1967-01-11 1969-05-06 United Parmatic Corp Magnetic indicating device
US3841158A (en) * 1972-01-03 1974-10-15 Bailey Meter Co Differential pressure transmitter overrange protection
US4521651A (en) * 1982-10-12 1985-06-04 Mitsubishi Denki Kabushiki Kaisha Diaphragm apparatus having a magnetically imparted hysteresis characteristic
US4668889A (en) * 1986-06-06 1987-05-26 Adams Donald L Static overpressure protection system for differential pressure transducer
CN109029833A (en) * 2018-10-15 2018-12-18 河北领冠仪器仪表有限公司 A kind of magnetism differential pressure gauge and its application method
CN114496646A (en) * 2022-02-18 2022-05-13 朗松珂利(上海)仪器仪表有限公司 Remote transmission type gas density relay

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3250873A (en) * 1964-03-20 1966-05-10 Marvel Eng Co Filter signal
US3335694A (en) * 1964-09-04 1967-08-15 Dwyer Mfg Co F W Bistable magnetic pressure indicator
US3301141A (en) * 1964-10-20 1967-01-31 Fairchild Hiller Corp Magnetically damped pneumatic control devices
US3412706A (en) * 1965-04-09 1968-11-26 Bowser Inc Differential pressure indicator
US3442248A (en) * 1967-01-11 1969-05-06 United Parmatic Corp Magnetic indicating device
US3841158A (en) * 1972-01-03 1974-10-15 Bailey Meter Co Differential pressure transmitter overrange protection
US4521651A (en) * 1982-10-12 1985-06-04 Mitsubishi Denki Kabushiki Kaisha Diaphragm apparatus having a magnetically imparted hysteresis characteristic
US4668889A (en) * 1986-06-06 1987-05-26 Adams Donald L Static overpressure protection system for differential pressure transducer
CN109029833A (en) * 2018-10-15 2018-12-18 河北领冠仪器仪表有限公司 A kind of magnetism differential pressure gauge and its application method
CN114496646A (en) * 2022-02-18 2022-05-13 朗松珂利(上海)仪器仪表有限公司 Remote transmission type gas density relay

Also Published As

Publication number Publication date
ES255387A1 (en) 1960-04-16
FR1247205A (en) 1960-11-25

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