US3373526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustically controlled closure apparatus
Assignee: National Research Development Corp UK
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Filing: 1965-05-25
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Granted: 1968-03-19
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Expires: 1985-05-25
Abstract
No abstract record available.
Inventors
- 👤 Parkin Peter Hubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:18
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/70; E05F15/71; E05F11/00; E05F11/02; E05Y; E05Y2800/00; E05Y2800/40; E05Y2800/422
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
ACOUSTICALLY CONTROLLED CLOSURE APPARATUS COMPRISING AN APERTURED MEMBER ADAPTED TO FORM PART OF A BOUNDARY WALL OF AN ENCLOSURE, A CLOSURE MEMBER MOVABLE BETWEEN A CLOSED POSITION IN WHICH AN APERTURE IN THE APERTURED MEMBER IS CLOSED AND AT LEAST ONE OPEN POSITION IN WHICH THE SAID APERTURE IS AT LEAST PARTIALLY OPENED, A SOUND DETECTION DEVICE RESPONSIVE TO A PREDETERMINED NOISE LEVEL ABOUT THE ENCLOSURE, CONTROL MEANS WHICH ARE CONTROLLED BY THE SOUND DETECTION DEVICE AND DELAY MEANS INCLUDED IN SAID CONTROL MEANS SAID CONTROL MEANS OPERATING, WHEN THE CLOSURE MEMBER IS AT LEAST PARTIALLY OPEN AND THE SOUND DETECTION DEVICE DETECTS A NOISE LEVEL IN EXCESS OF SAID PREDETERMINED LEVEL, FIRST TO CLOSE THE CLOSURE MEMBER AND, A PREDETERMINED TIME, DETERMINED BY SAID DELAY MEANS, AFTER THE NOISE LEVEL HAS FALLEN BELOW THE SAID PREDETERMINED LEVEL, SUBSEQUENTLY TO RE-OPEN THE CLOSURE MEMBER TO RESTORE IT TO ITS AT LEAST PARTIALLY OPEN POSITION.
Claim 2
Dependent Claim
154 words
ACOUSTICALLY CONTROLLED CLOSURE APPARATUS COMPRISING AN APERTURED MEMBER ADAPTED TO FORM PART OF A BOUNDARY WALL OF AN ENCLOSURE, A CLOSURE MEMBER MOVABLE BETWEEN A CLOSED POSITION IN WHICH AN APERTURE IN THE APERTURED MEMBER IS CLOSED AND AT LEAST ONE OPEN POSITION IN WHICH THE SAID APERTURE IS AT LEAST PARTIALLY OPENED, A SOUND DETECTION DEVICE RESPONSIVE TO A PREDETERMINED NOISE LEVEL ABOUT THE ENCLOSURE, CONTROL MEANS WHICH ARE CONTROLLED BY THE SOUND DETECTION DEVICE AND DELAY MEANS INCLUDED IN SAID CONTROL MEANS SAID CONTROL MEANS OPERATING, WHEN THE CLOSURE MEMBER IS AT LEAST PARTIALLY OPEN AND THE SOUND DETECTION DEVICE DETECTS A NOISE LEVEL IN EXCESS OF SAID PREDETERMINED LEVEL, FIRST TO CLOSE THE CLOSURE MEMBER AND, A PREDETERMINED TIME, DETERMINED BY SAID DELAY MEANS, AFTER THE NOISE LEVEL HAS FALLEN BELOW THE SAID PREDETERMINED LEVEL, SUBSEQUENTLY TO RE-OPEN THE CLOSURE MEMBER TO RESTORE IT TO ITS AT LEAST PARTIALLY OPEN POSITION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |