Patent US3344705A successfully refreshed from Google Patents.
US3344705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Penumbra-avoiding shutter devices for viewers and projectors
Assignee: —
•
Filing: —
•
Granted: 1967-10-03
•
Expires: 1984-10-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:46
CPC Classifications
G; G02; G02B; G02B26/00; G02B26/02; E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/264
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
IN A SHUTTER DEVICE OF THE CHARACTER DESCRIBED, THE COMBINATION WITH A FRAME HOLDING A TRANSPARENT PANE, TWO PARALLEL ROLLERS ROTATABLY MOUNTED IN SPACED RELATION ON SAID FRAME BEHIND SAID PANE, TWO PLIABLE OPAQUE SHADES, ONE CARRIED ON EACH OF SAID ROLLERS, TO UNWIND AND WIND UP THEREON; THE LEAD EDGES OF SAID SHADES BEING BETWEEN SAID ROLLERS, STIFF MEMBERS MOUNTED ONE ALONG THE LEAD EDGE OF EACH OF SAID SHADES, AN ENDLESS BELT CONNECTING SAID ROLLERS; THE FLIGHTS OF SAID BELT CROSSING EACH OTHER AND SECURED TO SAID STIFF MEMBERS RESPECTIVELY; THE PLANE OF SAID BELT BEING SUBSTANTIALLY PERPENDICULAR TO SAID PANE, ELONGATED MEMBERS CARRIED PARALLEL, ONE BY EACH OF SAID LEAD EDGE MEMBERS AND IN A DIRECTION ALONG THE LEAD EDGE MEMBER IT IS CARRIED BY; SAID ELONGATED MEMBERS RESILIENTLY PRESSING AGAINST SAID PANE AND EACH OF SAID ELONGATED MEMBERS BEING INAT LEAST LINE CONTACT WITH SAID PANE AND MEANS TO MOVE SAID BELT.
Claim 2
Dependent Claim
156 words
IN A SHUTTER DEVICE OF THE CHARACTER DESCRIBED, THE COMBINATION WITH A FRAME HOLDING A TRANSPARENT PANE, TWO PARALLEL ROLLERS ROTATABLY MOUNTED IN SPACED RELATION ON SAID FRAME BEHIND SAID PANE, TWO PLIABLE OPAQUE SHADES, ONE CARRIED ON EACH OF SAID ROLLERS, TO UNWIND AND WIND UP THEREON; THE LEAD EDGES OF SAID SHADES BEING BETWEEN SAID ROLLERS, STIFF MEMBERS MOUNTED ONE ALONG THE LEAD EDGE OF EACH OF SAID SHADES, AN ENDLESS BELT CONNECTING SAID ROLLERS; THE FLIGHTS OF SAID BELT CROSSING EACH OTHER AND SECURED TO SAID STIFF MEMBERS RESPECTIVELY; THE PLANE OF SAID BELT BEING SUBSTANTIALLY PERPENDICULAR TO SAID PANE, ELONGATED MEMBERS CARRIED PARALLEL, ONE BY EACH OF SAID LEAD EDGE MEMBERS AND IN A DIRECTION ALONG THE LEAD EDGE MEMBER IT IS CARRIED BY; SAID ELONGATED MEMBERS RESILIENTLY PRESSING AGAINST SAID PANE AND EACH OF SAID ELONGATED MEMBERS BEING INAT LEAST LINE CONTACT WITH SAID PANE AND MEANS TO MOVE SAID BELT.
References Cited (Backward Citations)
US1813689A
Cited
US2378933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |