CH642807GA3 - - Google Patents

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Publication number
CH642807GA3
CH642807GA3 CH231882A CH231882A CH642807GA3 CH 642807G A3 CH642807G A3 CH 642807GA3 CH 231882 A CH231882 A CH 231882A CH 231882 A CH231882 A CH 231882A CH 642807G A3 CH642807G A3 CH 642807GA3
Authority
CH
Switzerland
Prior art keywords
delta
test
permissible
result
value
Prior art date
Application number
CH231882A
Other languages
German (de)
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 filed Critical
Priority to CH231882A priority Critical patent/CH642807GA3/de
Priority to DE19833312963 priority patent/DE3312963A1/en
Publication of CH642807GA3 publication Critical patent/CH642807GA3/de

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D7/00—Measuring, counting, calibrating, testing or regulating apparatus
    • G04D7/006—Testing apparatus for complete clockworks with regard to external influences or general good working
    • G04D7/007—Testing apparatus for complete clockworks with regard to external influences or general good working with regard to the sealing of the case
    • 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)
  • Electric Clocks (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

In testing the leakproofness of a watch (2) or other hollow body, the internal volume (V) of the test specimen is considered. In this case, the deformation (hp-ho) of the base (9) is measured under increased pressure (p) by the sensor (11). In the event of a predetermined permissible leakage rate (PLz, e.g. 50 mu g/min), it is not permissible for the regeneration ( DELTA h) effected by the leak to exceed a permissible value ( DELTA hz) within the measuring time ( DELTA t). This value ( DELTA hz) is computed by the microcomputer (3) with the aid of the measured hp-ho- and the input DELTA t,p,V data upon attainment of the test pressure (p), the same applying to the result of the test after expiry of the test time ( DELTA t). Said result is displayed by means of lamps (NG, OK) or on the instrument (15). <IMAGE>
CH231882A 1982-04-16 1982-04-16 CH642807GA3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CH231882A CH642807GA3 (en) 1982-04-16 1982-04-16
DE19833312963 DE3312963A1 (en) 1982-04-16 1983-04-11 Method for operating a device for testing the leakproofness of watches and other hollow bodies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH231882A CH642807GA3 (en) 1982-04-16 1982-04-16

Publications (1)

Publication Number Publication Date
CH642807GA3 true CH642807GA3 (en) 1984-05-15

Family

ID=4231000

Family Applications (1)

Application Number Title Priority Date Filing Date
CH231882A CH642807GA3 (en) 1982-04-16 1982-04-16

Country Status (2)

Country Link
CH (1) CH642807GA3 (en)
DE (1) DE3312963A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3707197A1 (en) * 1987-03-04 1988-09-15 Siemens Ag METHOD FOR TIGHTNESS TESTING OF ELECTRICAL DEVICES ENCLOSED IN A GAS SEAL, IN PARTICULAR OVERVOLTAGE ARRESTER
US4899574A (en) * 1989-02-01 1990-02-13 The Mead Corporation Method and apparatus for detecting leaks in a sealed container
DE3936163A1 (en) * 1989-10-31 1991-05-02 Fraunhofer Ges Forschung Measuring soundness of hermetically sealed containers - subjecting flexible part to pressure in test chamber and comparing deformation arising from internal pressure
DE4017693C2 (en) * 1990-06-01 1995-11-16 Martin Lehmann Leakage test
CH683737B5 (en) * 1992-07-14 1994-11-15 Witschi Electronic Ag Procedures for examining cases.
CH684863B5 (en) * 1993-04-14 1995-07-31 Witschi Electronic Ag Method and device for testing the water tightness of housings.
CH684730B5 (en) * 1993-04-20 1995-06-15 Witschi Electronic Ag Procedure for determining the minimum required measuring time for a leak test of casings and an application of the method.

Also Published As

Publication number Publication date
DE3312963A1 (en) 1983-10-27

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