JPS5737242A - Apparatus for inspecting airtightness - Google Patents

Apparatus for inspecting airtightness

Info

Publication number
JPS5737242A
JPS5737242A JP11310080A JP11310080A JPS5737242A JP S5737242 A JPS5737242 A JP S5737242A JP 11310080 A JP11310080 A JP 11310080A JP 11310080 A JP11310080 A JP 11310080A JP S5737242 A JPS5737242 A JP S5737242A
Authority
JP
Japan
Prior art keywords
pressure
airtightness
pressure chamber
constitution
leak
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.)
Pending
Application number
JP11310080A
Other languages
Japanese (ja)
Inventor
Satoshi Omori
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.)
Mitsutoyo Manufacturing Co Ltd
Original Assignee
Mitsutoyo Manufacturing Co 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 Mitsutoyo Manufacturing Co Ltd filed Critical Mitsutoyo Manufacturing Co Ltd
Priority to JP11310080A priority Critical patent/JPS5737242A/en
Publication of JPS5737242A publication Critical patent/JPS5737242A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/36—Investigating fluid-tightness of structures by using fluid or vacuum by detecting change in dimensions of the structure being tested
    • G01M3/363—Investigating fluid-tightness of structures by using fluid or vacuum by detecting change in dimensions of the structure being tested the structure being removably mounted in a test cell

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

PURPOSE:To make the inspection of airtightness, simpler by providing a pressure chamber used to place an airtight vessel in a fixed position, a pressurizing device to make said chamber under pressurized state, and a strain gauge for detecting the pressure difference between the pressure in the pressure chamber under a pressurized state and the pressure in the airtight vessel. CONSTITUTION:A semiconductor strain gauge 22 used to detect the deformation of glass 12a produced by the pressure difference between the pressure in a pressure chamber 10 and that in a wrist watch 12 is allowed to stick to the surface of the glass 12a via a rubber sheet 24 and a metal plate 26. A detection signal 100 outputted from a voltage amplifier 30e is converted into 100a, 100b or 100c depending upon the amount of the leak in the wrist watch 12, and the signal is compared with a small and modium leak reference voltage Vcc and a large leak reference voltage VD regularly and supplied to one of the AND inputs of AND circuits 52, 56. With this constitution, the airtightness of the vessel under test can readily be inspected.
JP11310080A 1980-08-18 1980-08-18 Apparatus for inspecting airtightness Pending JPS5737242A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11310080A JPS5737242A (en) 1980-08-18 1980-08-18 Apparatus for inspecting airtightness

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11310080A JPS5737242A (en) 1980-08-18 1980-08-18 Apparatus for inspecting airtightness

Publications (1)

Publication Number Publication Date
JPS5737242A true JPS5737242A (en) 1982-03-01

Family

ID=14603476

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11310080A Pending JPS5737242A (en) 1980-08-18 1980-08-18 Apparatus for inspecting airtightness

Country Status (1)

Country Link
JP (1) JPS5737242A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59125887A (en) * 1982-12-24 1984-07-20 Takashi Mori Feeder for carbonic acid gas and oxygen in device for growing organism
JPS60202342A (en) * 1984-03-27 1985-10-12 Matsushita Refrig Co Pressure-reduction-degree checking device of packed body
JPH0972819A (en) * 1995-09-05 1997-03-18 Hamuron Tec:Kk Method and equipment for testing airtightness

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59125887A (en) * 1982-12-24 1984-07-20 Takashi Mori Feeder for carbonic acid gas and oxygen in device for growing organism
JPS6260060B2 (en) * 1982-12-24 1987-12-14 Takashi Mori
JPS60202342A (en) * 1984-03-27 1985-10-12 Matsushita Refrig Co Pressure-reduction-degree checking device of packed body
JPH0972819A (en) * 1995-09-05 1997-03-18 Hamuron Tec:Kk Method and equipment for testing airtightness

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