US3834346A - Fluid circuit indicator - Google Patents

Fluid circuit indicator Download PDF

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Publication number
US3834346A
US3834346A US00289578A US28957872A US3834346A US 3834346 A US3834346 A US 3834346A US 00289578 A US00289578 A US 00289578A US 28957872 A US28957872 A US 28957872A US 3834346 A US3834346 A US 3834346A
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US
United States
Prior art keywords
chamber
fluid
aperture
set forth
sheet
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
US00289578A
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English (en)
Inventor
L Cowan
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.)
Leesona Corp
Original Assignee
Leesona 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 Leesona Corp filed Critical Leesona Corp
Priority to US00289578A priority Critical patent/US3834346A/en
Priority to JP48096540A priority patent/JPS4988575A/ja
Priority to NL7312006A priority patent/NL7312006A/xx
Priority to CA180,338A priority patent/CA1003280A/en
Priority to DE19732345993 priority patent/DE2345993A1/de
Priority to FR7333170A priority patent/FR2200520B1/fr
Priority to GB2496072A priority patent/GB1390248A/en
Application granted granted Critical
Publication of US3834346A publication Critical patent/US3834346A/en
Assigned to JOHN BROWN INDUSTRIES LTD., A CORP. OF DE. reassignment JOHN BROWN INDUSTRIES LTD., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: LEESONA CORPORATION; 333 STRAWBERRY FIELD RD., WARWICK, RI. A CORP. OF MA.
Assigned to LEESONA CORPORATION reassignment LEESONA CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE DATE 3-31-81 STATE OF DELAWARE Assignors: JOHN BROWN INDUSTRIES LTD.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/08—Means for indicating or recording, e.g. for remote indication
    • G01L19/12—Alarms or signals

Definitions

  • the device [51] 19/12 includes means defining a restricted zone and a supply [58] Fieid 4 117 of compressible material positioned in communication 73/388 R 91/1. 1 6 with the restricted zone.
  • the restricted zone is pro- 106 106 vided with aperture means exposing at least a portion of the compressible material for visual inspection.
  • Fluid inlet means are connected with a fluid circuit [56] References Cited and operate to admit pressurized flu1d to the restr1cted UNITED STATES PATENTS zone, in consequence of which the compressible mate- 3,203,229 8/1965 PBYQI 73/406 X rial is compressed
  • the contrasting relaxed com- 3,241,514 3/1966 Gnmland 6/70 pressed conditions of the compressible material afford gig- :6 visual indications of the condition of the fluid circuit.
  • the present invention relates to pressure indicators and relates, more particularly, to a device for providing an indication of the condition of a pressurized fluid circuit.
  • Non-electrical units commonly include elements having movable pistons operated on fluid from the fluid circuit, the position of the piston being available for visual inspection to thus provide a means by which an operator can derive an indication of the condition of the fluid circuit.
  • Electrical devices of the foregoing types are rather costly in that not only are they expensive to manufacture per se, but they must also include interfacing structure between the electrical device and the fluid source.
  • the present invention includes an element providing a restricted zone in the form of fluid receiving chamber.
  • a supply of a compressible material such as an elastomeric closed cell foam, is situated in communication with the chamber.
  • a lens overlays the sheet or layer of closed cell foam to secure the edges-of the sheet in position surrounding the chamber.
  • a fluid gap 34 is provided between the lens and the sheet.
  • FIG. 1 is a top plan view of a group of visual indicator devices in accordance with the present invention arranged in a gang on a common panel and indicating the condition at several separate locations within the fluid circuit;
  • FIG. 2 is a cross sectional view of one of the indicating devices of FIG. 1 shown in connection with a fluid element, the condition of this element being indicated by the device.
  • FIG. 1 of the drawing a mounting panel 10 is illustrated.
  • a plurality of indicatordevices l2a-d which are operable to indicate the condition at various points in a fluid circuit are arranged on panel 10.
  • indicators 12a are in the closed or non-operative condition indicating that fluid pressure is not present at the points in the circuit to which they are connected.
  • indicators 12b and 12d are shown in the open or operative condition, indicative of the fact that fluid pressure is present at the points in the fluid circuit at which they are connected. Therefore, by visual inspection of the indicators in block 10 ready diagnosis of the condition of the fluid circuit may be obtained by an inspector and, in the event of a malfunction in the circuit, the location of the malfunction can be readily traced with the aid of the indicators.
  • the indicator 12 includes a body 20 which, if several indicators are to be ganged or arrayed as shown in FIG. 1, may be a block common to all of the indicators so ganged or arrayed.
  • the body 20 is countersunk to provide a chamber 22 which is disposed centrally in the indicator.
  • a fluid inlet 24 is bored through the base of the chamber 22 and opens outwardly through the base of block 20.
  • the perimeter of chamber 22 is provided with an elevated lip 26 forming a complete margin around the chamber.
  • a single sheet'28 of closed cell foam material may be employed to accommodate all of the indicators so ganged.
  • a clear flat lens 30 of glass, plas tic or other transparent material overlays sheet 28 and isfastened to block by means of screws 32. By this means the sheet of closed cell foam material is sandwiched between lens and lip 26 to thereby provide a firm grip on the foam material 28 and form a fluid seal between said lens and said lip.
  • the closed cell foam material 28 is provided with a plurality of slits 36 and relief ports 38. As will be explained in further detail hereinafter the slits 36 and relief ports 38 provide clearances which contribute to prompt compression of sheet 28 when pressure is applied in chamber 22.
  • the fluid circuit may be considered to include a spring return, air actuated cylinder 40 containing a piston 42.
  • Air is supplied from a suitable source under pressure P, through line 44 to cylinder 40.
  • a tee 46 is present in the circuit to conduct the pressurized air to cylinder 40.
  • a further air line 48 is connected with tee 46 and is operable to deliver the pressurized air into chamber 22 via inlet 24.
  • the supply air is delivered to air cylinder 40 to extend piston 42.
  • line 48 is connected in the circuit the air to cylinder40 simultaneously is delivered to chamber 22.
  • the pressurized air is applied both to the lower and upper surfaces of sheet 28, the air passing through slits 36 and relief ports 38 and into air passage 34 to-be applied to both faces of the sheet in-its zone adjacent chamber 22.
  • the closed cell foam material compresses and is drawn toward lips 26.
  • Such retraction of the material is promoted by the clearances afforded by slits 36 and relief ports 38.
  • an inspector viewing this specific indicator would note the enlarged opening provided into chamber 22 by virtue of the retraction of sheet 28 of closed cell foam material.
  • the interior S2 of chamber 22 may be coated with a highly reflective material such as a paint contrasting in color with sheet 28.
  • a further advantage of the present invention resides in the fact that if the full level of air pressure required for extending piston 42 is impeded for some reason sheet 28 will not be in its full open position. Rather, the sheet will compress to a degree correlated with the amount of air admitted into chamber 22 and against the opposing surfaces of sheet 28.
  • an analog signal is provided having direct correspondence to the pressure existing in the fluid circuit and thereby providing a readout proportional to the air in the circuit at the point therein being diagnosed.
  • the present invention provides a new and novel device for indicating the condition of a pressurized fluid circuit which utilizes low air pressure, which provides an analog output signal and which is operable under relatively low fluid pressures.
  • the device also involves no moving parts and does not consume any appreciable amount of the fluid in the circuit.
  • a device for providing an indication of the conditions of a pressurized fluid circuit comprising, means defining a closed fluid receiving chamber, a body of compressible material positioned in said chamber defining therein an aperture, means in said chamber exposing at least a portion of said compressible material about said aperture for visual inspection, and fluid inlet means connected with said chamber operable to selectively admit pressurized fluid to said chamber of a pressure sufficient to compress said compressible material thereby to change the dimensions of said aperture and provide a visual indication of the pressure of said fluid.
  • a device as set forth in claim 1 including a housing having said chamber therein, and means about the periphery of said chamber holding said body of compressible material in a fluid tight seal to retain said fluid within said chamber.
  • a device as set forth in claim 3 wherein said means visibly exposing the material comprises lens means.
  • a device as set forth in claim 2 wherein said means about the periphery of said chamber comprises a lip around said aperture, and said compressible material is formed as a sheet substantially enclosing said aperture, and said means exposing the material comprises lens means overlaying said sheet and securing it on said lip.
  • a device as set forth in claim 1 including an indicator surface formed in the interior of said chamber of contrasting appearance to said material and visible through said aperture when said dimensions are increased.
  • a device as set forth in claim 5 including a fluid gap between said sheet and said lens means for admission of pressurized fluid received from said chamber.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)
US00289578A 1972-09-15 1972-09-15 Fluid circuit indicator Expired - Lifetime US3834346A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US00289578A US3834346A (en) 1972-09-15 1972-09-15 Fluid circuit indicator
JP48096540A JPS4988575A (de) 1972-09-15 1973-08-28
NL7312006A NL7312006A (de) 1972-09-15 1973-08-31
CA180,338A CA1003280A (en) 1972-09-15 1973-09-05 Fluid circuit indicator
DE19732345993 DE2345993A1 (de) 1972-09-15 1973-09-12 Anzeigevorrichtung fuer druckfluidkreise
FR7333170A FR2200520B1 (de) 1972-09-15 1973-09-14
GB2496072A GB1390248A (en) 1972-09-15 1973-09-14 Fluid pressure indicating devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00289578A US3834346A (en) 1972-09-15 1972-09-15 Fluid circuit indicator

Publications (1)

Publication Number Publication Date
US3834346A true US3834346A (en) 1974-09-10

Family

ID=23112138

Family Applications (1)

Application Number Title Priority Date Filing Date
US00289578A Expired - Lifetime US3834346A (en) 1972-09-15 1972-09-15 Fluid circuit indicator

Country Status (7)

Country Link
US (1) US3834346A (de)
JP (1) JPS4988575A (de)
CA (1) CA1003280A (de)
DE (1) DE2345993A1 (de)
FR (1) FR2200520B1 (de)
GB (1) GB1390248A (de)
NL (1) NL7312006A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3896851A (en) * 1974-01-28 1975-07-29 Leesona Corp Integrated modular fluid logic arrays displaying dynamic circuit operating conditions
US4166430A (en) * 1977-09-14 1979-09-04 Amerace Corporation Fluid pressure indicator
US4166429A (en) * 1977-09-14 1979-09-04 Amerace Corporation Fluid pressure indicator
US20180321063A1 (en) * 2016-08-15 2018-11-08 Stress Indicators, Inc. Chromaulic displacement transducer, method of manufacturing a chromaulic displacement transducer, and closed loop control system incorporating the same
US11125643B2 (en) * 2017-11-07 2021-09-21 Suzhou Rs Technology Co., Ltd. Sealing detection method for a sealing structure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56116638U (de) * 1980-02-07 1981-09-07

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3203229A (en) * 1962-06-28 1965-08-31 Budd Co Photoelastic leak detection methods
US3241514A (en) * 1964-10-12 1966-03-22 Geotechnical Corp Pneumatic pressure indicator
US3318328A (en) * 1965-05-26 1967-05-09 Combustion Eng Alarm system
US3372501A (en) * 1966-02-23 1968-03-12 George B. Greene Pneumatic display sign
US3492968A (en) * 1968-07-08 1970-02-03 Gardner Denver Co Fluid actuated visual indicator
US3556044A (en) * 1969-04-15 1971-01-19 Robertshaw Controls Co Indicating means
US3703879A (en) * 1971-04-06 1972-11-28 Charles K Huthsing Jr Pressure indicator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE917582C (de) * 1944-02-22 1954-09-06 Draegerwerk Ag Anzeigevorrichtung
US2761411A (en) * 1952-09-29 1956-09-04 Bendix Aviat Corp Pressure indicating device
FR1566635A (de) * 1968-03-26 1969-05-09
FR2079905A5 (de) * 1970-02-17 1971-11-12 Jouvenel & Cordier

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3203229A (en) * 1962-06-28 1965-08-31 Budd Co Photoelastic leak detection methods
US3241514A (en) * 1964-10-12 1966-03-22 Geotechnical Corp Pneumatic pressure indicator
US3318328A (en) * 1965-05-26 1967-05-09 Combustion Eng Alarm system
US3372501A (en) * 1966-02-23 1968-03-12 George B. Greene Pneumatic display sign
US3492968A (en) * 1968-07-08 1970-02-03 Gardner Denver Co Fluid actuated visual indicator
US3556044A (en) * 1969-04-15 1971-01-19 Robertshaw Controls Co Indicating means
US3703879A (en) * 1971-04-06 1972-11-28 Charles K Huthsing Jr Pressure indicator

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3896851A (en) * 1974-01-28 1975-07-29 Leesona Corp Integrated modular fluid logic arrays displaying dynamic circuit operating conditions
US4166430A (en) * 1977-09-14 1979-09-04 Amerace Corporation Fluid pressure indicator
US4166429A (en) * 1977-09-14 1979-09-04 Amerace Corporation Fluid pressure indicator
US20180321063A1 (en) * 2016-08-15 2018-11-08 Stress Indicators, Inc. Chromaulic displacement transducer, method of manufacturing a chromaulic displacement transducer, and closed loop control system incorporating the same
US10551225B2 (en) * 2016-08-15 2020-02-04 Stress Indicators, Inc. Chromaulic displacement transducer, method of manufacturing a chromaulic displacement transducer, and closed loop control system incorporating the same
US11125643B2 (en) * 2017-11-07 2021-09-21 Suzhou Rs Technology Co., Ltd. Sealing detection method for a sealing structure

Also Published As

Publication number Publication date
FR2200520B1 (de) 1978-12-08
GB1390248A (en) 1975-04-09
NL7312006A (de) 1974-03-19
JPS4988575A (de) 1974-08-23
CA1003280A (en) 1977-01-11
DE2345993A1 (de) 1974-03-21
FR2200520A1 (de) 1974-04-19

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Legal Events

Date Code Title Description
AS Assignment

Owner name: JOHN BROWN INDUSTRIES LTD.; 100 WEST TENTH ST., WI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:LEESONA CORPORATION; 333 STRAWBERRY FIELD RD., WARWICK, RI. A CORP. OF MA.;REEL/FRAME:003936/0206

Effective date: 19810501

AS Assignment

Owner name: LEESONA CORPORATION

Free format text: CHANGE OF NAME;ASSIGNOR:JOHN BROWN INDUSTRIES LTD.;REEL/FRAME:003936/0238

Effective date: 19810331