IT977149B - Perfezionamento negli indicatori magnetici di pressione - Google Patents

Perfezionamento negli indicatori magnetici di pressione

Info

Publication number
IT977149B
IT977149B IT47974/73A IT4797473A IT977149B IT 977149 B IT977149 B IT 977149B IT 47974/73 A IT47974/73 A IT 47974/73A IT 4797473 A IT4797473 A IT 4797473A IT 977149 B IT977149 B IT 977149B
Authority
IT
Italy
Prior art keywords
improvement
magnetic pressure
pressure indicators
indicators
magnetic
Prior art date
Application number
IT47974/73A
Other languages
English (en)
Original Assignee
Pall Corp
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 Pall Corp filed Critical Pall Corp
Application granted granted Critical
Publication of IT977149B publication Critical patent/IT977149B/it

Links

Classifications

    • 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
    • H01H35/38—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by piston and cylinder
    • 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
    • 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
    • H01H36/0073—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 relative movement between two magnets

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Measuring Fluid Pressure (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
IT47974/73A 1972-01-31 1973-01-30 Perfezionamento negli indicatori magnetici di pressione IT977149B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22226672A 1972-01-31 1972-01-31

Publications (1)

Publication Number Publication Date
IT977149B true IT977149B (it) 1974-09-10

Family

ID=22831552

Family Applications (1)

Application Number Title Priority Date Filing Date
IT47974/73A IT977149B (it) 1972-01-31 1973-01-30 Perfezionamento negli indicatori magnetici di pressione

Country Status (8)

Country Link
US (1) US3785332A (it)
JP (1) JPS528198B2 (it)
CA (1) CA993277A (it)
DE (1) DE2304317C3 (it)
FR (1) FR2170032B1 (it)
GB (1) GB1412023A (it)
IT (1) IT977149B (it)
SE (1) SE391240B (it)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3974795A (en) * 1975-06-18 1976-08-17 Facet Enterprises, Inc. Filter Products Division Differential pressure indicating device
US4026153A (en) * 1975-08-08 1977-05-31 Pall Corporation Magnetic pressure indicator with sampling ports
US4172971A (en) * 1978-10-30 1979-10-30 Pall Corporation Magnetic pressure indicator with thermal lockout
US4426952A (en) * 1981-02-09 1984-01-24 Facet Enterprises, Inc. Temperature compensated differential pressure indicating device
JPS6146822U (ja) * 1984-08-30 1986-03-28 株式会社 コマバ製作所 固定具
US4729339A (en) * 1986-04-21 1988-03-08 Facet Enterprises, Inc. Pressure differential indicator with non-mechanical thermal lockout
GB2255826B (en) * 1991-05-13 1994-08-24 Pall Corp Indicators
US5437241A (en) * 1994-06-08 1995-08-01 Pall Corporation Differential pressure indicator
US5497725A (en) * 1994-06-17 1996-03-12 Theisen; Terry J. Sight indicator
GB2297161B (en) * 1995-01-23 1998-09-23 Pall Corp Differential pressure indicators
GB2297620B (en) * 1995-02-06 1998-10-07 Pall Corp Filter assemblies comprising differential pressure indicators
US7204149B1 (en) 2005-12-07 2007-04-17 D-M-E Company Apparatus for indicating pressure

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3140690A (en) * 1963-12-04 1964-07-14 Pall Corp Magnetic pressure indicator
US2942572A (en) * 1958-06-17 1960-06-28 Pall Corp Magnetic pressure indicator
US3077176A (en) * 1961-04-06 1963-02-12 Pall Corp Magnetic pressure-responsive devices
US3187711A (en) * 1963-12-19 1965-06-08 Pall Corp Magnetic pressure indicator
US3212471A (en) * 1964-04-03 1965-10-19 Purolator Products Inc Differential pressure indicator
US3568625A (en) * 1968-11-05 1971-03-09 Fairfield Facility Commercial Differential pressure indicator

Also Published As

Publication number Publication date
US3785332A (en) 1974-01-15
DE2304317C3 (de) 1980-01-10
SE391240B (sv) 1977-02-07
JPS4888979A (it) 1973-11-21
DE2304317A1 (de) 1973-08-09
CA993277A (en) 1976-07-20
GB1412023A (en) 1975-10-29
JPS528198B2 (it) 1977-03-07
DE2304317B2 (de) 1979-05-10
FR2170032A1 (it) 1973-09-14
FR2170032B1 (it) 1977-07-29

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