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US3860185A
Expired / Lapsed
US
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Rotation detector in a fixed length yarn winding apparatus
Assignee: Nippon Selen Co Ltd
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Filing: 1973-12-28
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Granted: 1975-01-14
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Expires: 1993-12-28
Abstract
Abstract A detector wherein detecting element is opposed to the peripheral side of a drum so that a magnetic or optical variation may be given whenever a screw fixing the shaft of said drum passes and that therefore the rotation may be accurately detected without detecting the number of revolutions of each drum or attaching any additional element as in the conventional technique.
Inventors
- 👤 Shozaburo Makino
- 👤 Seiji Otobe
- 👤 Shinichi Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:21
CPC Classifications
B; B65; B65H; B65H63/00; B65H63/02; B65H63/024; B65H63/028; B65H63/032; B65H63/0321; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
A rotation detector in a fixed length yarn winding apparatus comprising a drum engaging a bobbin for winding up yarn, a shaft through said drum rotatable therewith, a screw extending in the radial direction into said drum to fix the shaft to said drum and a detecting element adjacent to the peripheral side of said drum, said detecting element sensing the screw and producing signal pulses whenever the head part of said screw passes.
Claim 2
Dependent Claim
74 words
A rotation detector in a fixed length yarn winding apparatus comprising a drum engaging a bobbin for winding up yarn, a shaft through said drum rotatable therewith, a screw extending in the radial direction into said drum to fix the shaft to said drum and a detecting element adjacent to the peripheral side of said drum, said detecting element sensing the screw and producing signal pulses whenever the head part of said screw passes.
Claim 3
Dependent Claim
25 words
A detector according to claim 1 wherein said detecting element comprises a pick-up coil connected with a wound yarn stopping means through a frequency divider.
Claim 4
Dependent Claim
13 words
A detector according to claim 2 wherein said stopping means is a cutter.
Claim 5
Dependent Claim
26 words
A detector according to claim 2 wherein said stopping means is a controlling device operating to move a roll connecting said drum with a driving means.
Claim 6
Dependent Claim
37 words
A detector according to claim 2 wherein said screw is formed of a magnetic material, said coil is provided with a U-shaped magnetic core aNd a permanent magnet is inserted in a part of said magnetic core.
Claim 7
Dependent Claim
35 words
A detector according to claim 1 wherein a light reflecting layer is formed at least in the head part of said screw and said detecting element comprises a light source, prism and photoelectric converting means.
Claim 8
Dependent Claim
22 words
A detector according to claim 6 wherein said light source is a luminous diode and said photoelectric converting means is a phototransistor.
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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |