Patent US4222247A successfully refreshed from Google Patents.
US4222247A
Expired / Lapsed
US
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Needle selection mechanism for an automatic knitting machine
Assignee: Dainippon Screen Manufacturing Co Ltd
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Filing: 1978-12-14
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Granted: 1980-09-16
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Expires: 1998-12-14
Abstract
Abstract A needle selection mechanism for an automatic knitting machine, comprising at least two selector levers mounted to a carriage which is adapted to move along a needle retainer in which are disposed a plurality of selectors for knitting needles, wherein each selector is individually engageable with one of the selector levers, and different selectors are engageable with different selector levers, and wherein the selector levers set the selectors to either "knit" or "welt" positions.
Inventors
- 👤 Takeji Hashimoto
- 👤 Yoshio Nagao
- 👤 Yasushi Doi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:48
CPC Classifications
D; D04; D04B; D04B15/00; D04B15/66; D04B15/68; D04B15/78
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
133 words
A needle selection mechanism for an automatic knitting machine comprising a needle retainer, a plurality of selectors for knitting needles disposed in the needle retainer, at least two selector levers for selectively setting the selectors to either "knit" or "welt" position, and a carriage adapted to move along the needle retainer, characterized in that: the mechanism further includes a pulse generator which generates clock pulses of rectangular wave form and having a pitch synchronized with the movement of the carriage past the selectors, and a timing control circuit for controlling the timing of the moving of the selector levers by using timing pulses made from the leading edge or the trailing edge portions of the rectangular pulses for advancing the selector levers when the carriage is moved at high or low speed, respectively.
Claim 2
Dependent Claim
133 words
A needle selection mechanism for an automatic knitting machine comprising a needle retainer, a plurality of selectors for knitting needles disposed in the needle retainer, at least two selector levers for selectively setting the selectors to either "knit" or "welt" position, and a carriage adapted to move along the needle retainer, characterized in that: the mechanism further includes a pulse generator which generates clock pulses of rectangular wave form and having a pitch synchronized with the movement of the carriage past the selectors, and a timing control circuit for controlling the timing of the moving of the selector levers by using timing pulses made from the leading edge or the trailing edge portions of the rectangular pulses for advancing the selector levers when the carriage is moved at high or low speed, respectively.
Claim 3
Dependent Claim
28 words
A mechanism according to claim 1, wherein each selector lever is individually engageable with one of the selector levers and different selectors are engageable with different selector levers.
Claim 4
Dependent Claim
19 words
A mechanism according to claim 2, wherein substantially no two adjacent selectors are engageable with the same selector lever.
Claim 5
Dependent Claim
22 words
A mechanism according to claim 3, wherein two selector levers are provided and alternate selectors engage in turn with alternate selector levers.
Claim 6
Dependent Claim
19 words
A mechanism according to either claims 1 or 4, wherein each selector lever is moved by a torsion solenoid.
Claim 7
Dependent Claim
20 words
A mechanism according to claim 5, wherein each selector lever is coupled to the torsion solenoid by a spring plate.
Claim 8
Dependent Claim
24 words
A mechanism according to claim 1, wherein the mechanism is constructed symmetrically so as to be operable with the carriage moving in either direction.
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) | 1983-09-16 | 1984-03-17 | 1984-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-16 | 1988-03-17 | 1988-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-16 | 1992-03-17 | 1992-09-16 | $7700.00 | Window Closed / Lapsed |