GB1282692A - Pneumatic gauging equipment - Google Patents

Pneumatic gauging equipment

Info

Publication number
GB1282692A
GB1282692A GB2222470A GB2222470A GB1282692A GB 1282692 A GB1282692 A GB 1282692A GB 2222470 A GB2222470 A GB 2222470A GB 2222470 A GB2222470 A GB 2222470A GB 1282692 A GB1282692 A GB 1282692A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
dimension
capacitor
nozzle
valve
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
GB2222470A
Inventor
David Malcolm Marsh
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.)
TI Group Services Ltd
Original Assignee
TI Group Services 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 TI Group Services Ltd filed Critical TI Group Services Ltd
Priority to GB2222470A priority Critical patent/GB1282692A/en
Publication of GB1282692A publication Critical patent/GB1282692A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B13/00—Measuring arrangements characterised by the use of fluids
    • G01B13/02—Measuring arrangements characterised by the use of fluids for measuring length, width or thickness
    • G01B13/06—Measuring arrangements characterised by the use of fluids for measuring length, width or thickness for measuring thickness
    • G01B13/065—Height gauges
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B13/00—Measuring arrangements characterised by the use of fluids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
    • G01L11/004—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by the use of counterbalancing forces
    • G01L11/006—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by the use of counterbalancing forces hydraulic or pneumatic counterbalancing forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
    • G01L13/02—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements
    • G01L13/025—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements using diaphragms

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)
  • Measuring Arrangements Characterized By The Use Of Fluids (AREA)

Abstract

1282692 Measuring dimensions electrically T I (GROUP SERVICES) Ltd 4 May 1971 [8 May 1970] 22224/70 Headings G1N and G1U [Also in Division H3] To gauge the dimension of a workpiece air from a source is forced through a nozzle M, the back pressure in the nozzle being dependent on the dimension L. This pressure is applied to one side of a flexible diaphragm D whose other side is subjected to a back pressure controlled by a valve V which closes in dependence of the movement of the diaphragm. The diaphragm thus moves to an equilibrium portion dependent on the dimension L. In the invention the diaphragm itself directly closes the valve V, and is constituted by a metal or metalized material which forms, with a wall of the housing a capacitor whose value is indicative of the diaphragm displacement. The diaphragm may be a printed circuit board which may extend beyond the housing to carry the circuitry for measuring the capacitor. This capacitor, CD in Fig.3, controls the frequency of a multi-vibrator MV which feeds a diode rectifier circuit providing a current proportional to this frequency, the current being converted to a voltage by an amplifier E. The output is read on a meter MM which may be calibrated in length. This output may be fed to a "go; no-go" circuit in which upper and lower limits are set by potentiometers P1, P2, so that a lamp L1 or L2 lights up if the dimension is outside prescribed limits. A linear relationship between dimension and capacitance is achieved.
GB2222470A 1970-05-08 1970-05-08 Pneumatic gauging equipment Expired GB1282692A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2222470A GB1282692A (en) 1970-05-08 1970-05-08 Pneumatic gauging equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2222470A GB1282692A (en) 1970-05-08 1970-05-08 Pneumatic gauging equipment

Publications (1)

Publication Number Publication Date
GB1282692A true GB1282692A (en) 1972-07-19

Family

ID=10175937

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2222470A Expired GB1282692A (en) 1970-05-08 1970-05-08 Pneumatic gauging equipment

Country Status (1)

Country Link
GB (1) GB1282692A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2150375A (en) * 1983-11-18 1985-06-26 Brian Montandon Distributing device
US4594881A (en) * 1984-08-09 1986-06-17 Nihon Kuatsu System Corp., Ltd. Pressure detecting apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2150375A (en) * 1983-11-18 1985-06-26 Brian Montandon Distributing device
US4594881A (en) * 1984-08-09 1986-06-17 Nihon Kuatsu System Corp., Ltd. Pressure detecting apparatus

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Legal Events

Date Code Title Description
PS Patent sealed
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PLNP Patent lapsed through nonpayment of renewal fees