IT977149B - Perfezionamento negli indicatori magnetici di pressione - Google Patents
Perfezionamento negli indicatori magnetici di pressioneInfo
- 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
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)
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)
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)
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 |
-
1972
- 1972-01-31 US US00222266A patent/US3785332A/en not_active Expired - Lifetime
-
1973
- 1973-01-29 CA CA162,299A patent/CA993277A/en not_active Expired
- 1973-01-30 SE SE7301226A patent/SE391240B/xx unknown
- 1973-01-30 DE DE2304317A patent/DE2304317C3/de not_active Expired
- 1973-01-30 FR FR7303251A patent/FR2170032B1/fr not_active Expired
- 1973-01-30 IT IT47974/73A patent/IT977149B/it active
- 1973-01-30 GB GB465273A patent/GB1412023A/en not_active Expired
- 1973-01-31 JP JP48012799A patent/JPS528198B2/ja not_active Expired
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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