Patent US3570234A successfully refreshed from Google Patents.
US3570234A
Expired / Lapsed
US
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Pair flyer twisting using flexible bow
Assignee: AT&T Inc
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Filing: 1969-01-08
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Granted: 1971-03-16
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Expires: 1989-01-08
Abstract
Abstract THIS DISCLOSURE DESCRIBES A FLYER-TYPE CONDUCTOR PAIR TWISTER IN WHICH THE BOW CONSISTS OF A FLEXIBLE TUBE WITH TWO SMALLER FLEXIBLE TUBES WITHIN, THROUGH WHICH CONDUCTORS ARE RESPECTIVELY THREADED. THE ENTRANCE END OF THE TUBE IS FIXED SO THAT IT DOES NOT ROTATE AS THE BOW ROTATES. ALL CONDUCTOR TWIST OCCURS BETWEEN THE BOW EXIT AND THE TAKE-UP CAPSTAN. THESE BEING FIXED POINTS, THE TWIST LENGTH IS FINELY CONTROLLABLE.
Inventors
- 👤 Harold W Friesen
- 👤 William F Macpherson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:57
CPC Classifications
D; D07; D07B; D07B3/00; D07B3/08; D07B3/10; D07B3/103; D07B3/02; D07B3/022; H; H01; H01B; H01B13/00; H01B13/02; H01B13/0214; D07B2207/00; D07B2207/20; D07B2207/202; D07B2207/203; D07B2501/00; D07B2501/40; D07B2501/406
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |