FR2420745A1 - Electrical switch pressure maintenance indicator - has bellows inside enclosure to move shaft with one end having transparent marked cover - Google Patents

Electrical switch pressure maintenance indicator - has bellows inside enclosure to move shaft with one end having transparent marked cover

Info

Publication number
FR2420745A1
FR2420745A1 FR7808425A FR7808425A FR2420745A1 FR 2420745 A1 FR2420745 A1 FR 2420745A1 FR 7808425 A FR7808425 A FR 7808425A FR 7808425 A FR7808425 A FR 7808425A FR 2420745 A1 FR2420745 A1 FR 2420745A1
Authority
FR
France
Prior art keywords
electrical switch
bellows
shaft
enclosure
pressure maintenance
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.)
Granted
Application number
FR7808425A
Other languages
French (fr)
Other versions
FR2420745B1 (en
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
Priority to FR7808425A priority Critical patent/FR2420745A1/en
Publication of FR2420745A1 publication Critical patent/FR2420745A1/en
Application granted granted Critical
Publication of FR2420745B1 publication Critical patent/FR2420745B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
    • G01L7/02—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges
    • G01L7/06—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the bellows type
    • G01L7/061—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the bellows type construction or mounting of bellows

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

Maintenance of pressure within a sealed enclosure containing electrical switch with automatic snuffing is indicated by a shaft whose movement is controlled by bellows within the enclosure. The indicator has a wall of synthetic moulded material for sealed enclosure (12) with an orifice (14) into which the bellows (16) is inserted. A shaft (26) of insulating material is fixed to a base end (20) of the bellows and its free end (28) protrudes through the orifice to be covered by a transparent cover (30). Marks (34) on the cover permit indication of state of sealing of enclosure. A stop (36) prevents excessive movement of the shaft.
FR7808425A 1978-03-20 1978-03-20 Electrical switch pressure maintenance indicator - has bellows inside enclosure to move shaft with one end having transparent marked cover Granted FR2420745A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7808425A FR2420745A1 (en) 1978-03-20 1978-03-20 Electrical switch pressure maintenance indicator - has bellows inside enclosure to move shaft with one end having transparent marked cover

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7808425A FR2420745A1 (en) 1978-03-20 1978-03-20 Electrical switch pressure maintenance indicator - has bellows inside enclosure to move shaft with one end having transparent marked cover

Publications (2)

Publication Number Publication Date
FR2420745A1 true FR2420745A1 (en) 1979-10-19
FR2420745B1 FR2420745B1 (en) 1980-08-22

Family

ID=9206188

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7808425A Granted FR2420745A1 (en) 1978-03-20 1978-03-20 Electrical switch pressure maintenance indicator - has bellows inside enclosure to move shaft with one end having transparent marked cover

Country Status (1)

Country Link
FR (1) FR2420745A1 (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE317861C (en) *
US1774437A (en) * 1925-08-26 1930-08-26 Cons Ashcroft Hancock Co Expansible collapsible element
US2537729A (en) * 1940-11-26 1951-01-09 Cameron Iron Works Inc Pressure gauge
US3013236A (en) * 1960-04-11 1961-12-12 Marlan E Bourns Pressure responsive electrical instrument
DE1299533B (en) * 1967-01-24 1969-07-17 Draegerwerk Ag Pressure indicator for breathing apparatus
DE1963511A1 (en) * 1969-12-18 1971-06-24 Rainer Bergmann Charge level indicator for fire extinguishers
FR2125955A5 (en) * 1971-02-17 1972-09-29 Sundstrand Data Control
US4012960A (en) * 1975-08-25 1977-03-22 Caterpillar Tractor Co. Pressure gauge with expansible bellows
FR2358649A1 (en) * 1976-07-13 1978-02-10 Renaud Georges Manometer for fertiliser spraying machine - comprises tubular casing containing deformable enclosure with scale pointer

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE317861C (en) *
US1774437A (en) * 1925-08-26 1930-08-26 Cons Ashcroft Hancock Co Expansible collapsible element
US2537729A (en) * 1940-11-26 1951-01-09 Cameron Iron Works Inc Pressure gauge
US3013236A (en) * 1960-04-11 1961-12-12 Marlan E Bourns Pressure responsive electrical instrument
DE1299533B (en) * 1967-01-24 1969-07-17 Draegerwerk Ag Pressure indicator for breathing apparatus
DE1963511A1 (en) * 1969-12-18 1971-06-24 Rainer Bergmann Charge level indicator for fire extinguishers
FR2125955A5 (en) * 1971-02-17 1972-09-29 Sundstrand Data Control
US4012960A (en) * 1975-08-25 1977-03-22 Caterpillar Tractor Co. Pressure gauge with expansible bellows
FR2358649A1 (en) * 1976-07-13 1978-02-10 Renaud Georges Manometer for fertiliser spraying machine - comprises tubular casing containing deformable enclosure with scale pointer

Also Published As

Publication number Publication date
FR2420745B1 (en) 1980-08-22

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Legal Events

Date Code Title Description
ST Notification of lapse