Air bubble leak detection test device

• US H1,045 H
• Filed: 11/19/1990
• Issued: 05/05/1992
• Est. Priority Date: 11/19/1990
• Status: Abandoned Application

• Current Assignee: Arthur D. Wilson
• Original Assignee: Arthur D. Wilson
• Inventors: Wilson, Arthur D.
• Primary Examiner(s): Gregory, Bernarr E.
• Application Number:
  US76/151,82
• Time in Patent Office: 533 Days
• CPC Class Codes: G01M 3/06 by observing bubbles in a liquid pool

Abstract

Improved measurement of leakage in fuze seals is obtained by employing an r bubble leak indicator. The fuze to be tested is connected to an air supply line coming from an air bubble leak indicator. The air bubble leak indicator has a narrow orifice submerged in a liquid, which in turn is connected to an air supply. When the system has stabilized, any leakage from the fuze seals will result in air bubbles passing through the liquid. A light source and light detector placed at the outlet of the orifice will electronically detect bubbles and provide an electronic indication of leakage. The system also offers a visual indication of leakage. All parts of the unit being tested remain in a dry condition.

Claims

1. A leakage detection test device, comprising:

test fixture means for supporting a unit to be tested and applying air pressure to it, having an input;

air supply means having an output;

air bubble detection means for detecting the passage of air, having an input connected to the air supply means, an internal chamber partially filled with a liquid, input orifice means positioned in the internal chamber in the liquid and connected to the input, and output means positioned in the chamber above the liquid and connected to the input of the test fixture means.

2. A leakage detection test device as set forth in claim 1 above where the air bubble detection means further includes light intensity detection means adjacent the input orifice means of the air bubble detection means.

3. A leakage detection test device as set forth in claim 2 above where the walls of the air bubble detection means are transparent.

4. A leakage detection test device as set forth in claim 3 above where the input orifice is narrow.

5. A leakage detection test device as set forth in claim 4 above where the light intensity detection means includes light source means and light detection means.

6. A leakage detection test device as set forth in claim 5 above further including leakage rate detection means connected between the air bubble detection means and the text fixture means.

7. A leakage detection test device as set forth in claim 6 above where the leakage rate detection means includes manometer means.