US3229927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control systems
Assignee: GTE Sylvania Inc
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Filing: 1962-12-05
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Granted: 1966-01-18
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Expires: 1982-12-05
Abstract
No abstract record available.
Inventors
- 👤 Edmund U Cohler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:38
CPC Classifications
H; H02; H02P; H02P5/00; H02P5/46; H02P5/48; G; G11; G11B; G11B15/00; G11B15/56; G11B15/58; H03; H03M; H03M1/00; H03M1/12; H03M1/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
143 words
WEB TRANSPORT APPARATUS COMPRISING: AT LEAST ONE REEL FOR WINDING AND UNWINDING SAID WEB; A MOTOR FOR TURNING SAID REEL TO PREFORM SAID WINDING AND UNWINDING OPERATIONS; A WEB BUFFER UNIT; A SOURCE OF ELECTRIC POTENTIAL; A PLURALITY OF PHOTOCONDUCTIVE ELEMENTS; A PLURALITY OF IMPEDANCE ELEMENTS CORRESPONDING TO SAID PLURALITY OF PHOTOCONDUCTIVE ELEMENTS; SAID IMPEDANCE AND SAID PHOTOCONDUCTIVE ELEMENTS BEING SO SELECTED THAT EACH PHOTOCONDUCTIVE ELEMENT HAS A "LIGHT" RESISTANCE SUBSTANTIALLY LESS THAN, AND A "DARK" RESISTANCE SUBSTANTIALLY GREATER THAN, ITS CORRESPONDING IMPEDANCE ELEMENT; MEANS FOR SELECTIVELY CHANGEING COMBINATIONS OF SAID PHOTOCONDUCTIVE ELEMENTS FROM "LIGHT" TO "DARK" CONDITION IN ACCORDANCE WITH THE POSITION OF SAID WEB WITHIN SAID UNIT; AND, MEANS FOR CONNECTING SAID IMPEDANCE ELEMENTS TO SAID SOURCE OF POTENTIAL AND FOR SUMMING THE FLOW OF ELECTRIC CURRENT FROM SAID SOURCE THROUGH SAID IMPEDANCE ELEMENTS TO CONTROL THE OPERATIONS OF SAID MOTOR.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |