US3590256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device with photoelectric bubble indicator for the checking of gas-tight containers and the like by immersion in a liquid
Assignee: Individual
•
Filing: 1969-07-01
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Granted: 1971-06-29
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Expires: 1989-07-01
Abstract
Abstract The disclosure relates to a device for testing gastightness of pressurized containers immersing them in a liquid and counting the bubbles eventually issued from the tested containers. The device essentially comprises a tank containing a liquid into which is dipped a bell provided with a vertical shaft having at least a transparent portion adapted to be filled by the liquid contained in the tank, said transparent portion of the shaft being placed between a light source and a photocell. The container to be tested is immersed in said liquid and the eventual bubbles issued by it are revealed by the photocell and counted by a correlate counting device.
Inventors
- 👤 Teodorico Neeff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:43
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/06; G01M3/10; G01M3/38
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
42 words
The device of claim 5 wherein said bell-shaped receiver includes a protective wall extending in spaced concentric relationship to said vertical shaft, the space between said vertical shaft and protectivE wall being employed to house said photoelectric transmitter means and photocell receiver.
References Cited (Backward Citations)
US1613962A
Cited
US1926474A
Cited
US1995699A
Cited
US2333791A
Cited
US2961869A
Cited
US3251218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |