US3948062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic needle selecting means for circular knitting machines
Assignee: PRECISION FUKUHARA WORKS Inc
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Filing: 1974-06-26
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Granted: 1976-04-06
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Expires: 1994-06-26
Abstract
Abstract Electronic means for selective raising of the needles in circular knitting machines by the selective raising of jacks individually related to the needles in the cylinder needle slots, the jacks being of the rocking type having a fulcrum butt intermediate their ends. Alternate jacks are mechanically rocked to non-needle raising position while intervening jacks are mechanically rocked to needle raising position. A first electromagnet when selectively energized acts upon the intervening jacks at a point above their fulcrum butts to selectively rock selected ones of such jacks to non-needle raising position, while a second electromagnet when selectively energized acts upon the alternate jacks at a point below their fulcrum butts to selectively rock selected ones of such jacks to needle raising position. Those of such jacks which are in needle raising position are then mechanically raised thereby to raise their corresponding needles to knit level while those of such jacks which are in non-needle raising position are not raised thereby to cause their associated needles to remain at welt level.
Inventors
- 👤 Norishige Sumitomo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:35
CPC Classifications
D; D04; D04B; D04B15/00; D04B15/66; D04B15/68; D04B15/78
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
281 words
An electronic needle selecting device for a circular knitting machine having a circle of needles and a circle of jacks individually associated with the circle of needles, said jacks being movable between active and inactive positions and being adapted to be raised to raise said needles when in their active position, alternate ones of said jacks comprising a first series thereof while intervening ones of said jacks comprise a second series thereof, first jack moving means to move said jacks of said first series thereof to their active position, first electromagnetic means in addition to said first jack moving means and being operatively related to said first series of jacks to thereafter move selected ones thereof from their active to their inactive position when said first electromagnetic means is selectively pulsed according to a predetermined pattern, second jack moving means to move jacks of said second series thereof to their inactive position, second electromagnetic means in addition to said second jack moving means and being operatively related to said second series of jacks to thereafter move selected ones thereof from their inactive to their active position when said second electromagnetic means is selectively pulsed according to a predetermined pattern, and additional jack moving means following said first and said second electromagnetic means to thereafter raise those of said jacks of both of said series thereof which are in their active position thereby to raise such needles as are associated with such raised jacks, those of said jacks of both of said series thereof which are in their inactive position not being raised by said additional jack moving means whereby such needles as are associated with such non-raised jacks are not raised.
Claim 2
Dependent Claim
281 words
An electronic needle selecting device for a circular knitting machine having a circle of needles and a circle of jacks individually associated with the circle of needles, said jacks being movable between active and inactive positions and being adapted to be raised to raise said needles when in their active position, alternate ones of said jacks comprising a first series thereof while intervening ones of said jacks comprise a second series thereof, first jack moving means to move said jacks of said first series thereof to their active position, first electromagnetic means in addition to said first jack moving means and being operatively related to said first series of jacks to thereafter move selected ones thereof from their active to their inactive position when said first electromagnetic means is selectively pulsed according to a predetermined pattern, second jack moving means to move jacks of said second series thereof to their inactive position, second electromagnetic means in addition to said second jack moving means and being operatively related to said second series of jacks to thereafter move selected ones thereof from their inactive to their active position when said second electromagnetic means is selectively pulsed according to a predetermined pattern, and additional jack moving means following said first and said second electromagnetic means to thereafter raise those of said jacks of both of said series thereof which are in their active position thereby to raise such needles as are associated with such raised jacks, those of said jacks of both of said series thereof which are in their inactive position not being raised by said additional jack moving means whereby such needles as are associated with such non-raised jacks are not raised.
Claim 3
Dependent Claim
45 words
Device as in claim 1 wherein each of said jacks is a lever of the type which is rockable about a fulcrum intermediate its ends, and wherein said jacks are rockable about their said fulcrums in their movements between their said active and inactive positions.
Claim 4
Dependent Claim
86 words
Device as in claim 2 wherein said first jack moving means is a first jack cam, wherein said first jack cam acts upon said first series of jacks at one side of their fulcrums thereby to rock such jacks to their said active position, wherein said second jack moving means is a second jack cam, and wherein said second jack cam acts upon said second series of jacks at the other side of their said fulcrums thereby to rock such jacks to their said inactive position.
Claim 5
Dependent Claim
78 words
Device as in claim 3 wherein said first electromagnetic means acts upon said first series of jacks at said other side of their said fulcrums to rock selected ones of such jacks from their said active to their said inactive position, and wherein said second electromagnetic means acts upon said second series of jacks at said one side of their said fulcrums to rock selected ones of such jacks from their said inactive to their said active position.
Claim 6
Dependent Claim
136 words
Device as in claim 4 wherein first magnetic means is provided to magnetically retain said jacks of said first series thereof in their said active position when the latter are moved thereto by said first jack cam, wherein second magnetic means is provided to magnetically retain said jacks of said second series thereof in their said inactive position when the latter are moved thereto by said second jack cam, wherein said first magnetic means also magnetically retains said selected ones of said second series of jacks in their said active position when the latter are moved thereto by said second electromagnetic means, and wherein said second magnetic means also magnetically retains said selected ones of said first series of jacks in their said inactive position when the latter are moved thereto by said first electromagnetic means.
Claim 7
Dependent Claim
74 words
Device as in claim 5 wherein said first electromagnetic means acts to move said selected ones of said first series of jacks to their said inactive position by magnetically repelling the same when said first electromagnetic means is pulsed, and wherein said second electromagnetic means acts to move said selected ones of said second series of jacks to their said active position by magnetically repelling the same when said second electromagnetic means is pulsed.
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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) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |