US3751943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling the jacks and needles of circular knitting machines
Assignee: C Terrot Soehne and Co
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Filing: 1970-09-09
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Granted: 1973-08-14
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Expires: 1990-09-09
Abstract
Abstract Apparatus for the control of jacks and needles of a circular knitting machine with a needle track. The machine has gradually sloping cam means disposed around the cylinder of the circular knitting machine which position the non-knitting needles, such cam means being so arranged that the needle butt or cam follower is indirectly moved by a gently sloping portion of the cam means, without having the needle butt of the non-knitting needles engage the steepest portion of the curve of the stitch cam mechanism; every needle is provided with a swinging jack having a jack butt or cam follower, and the retracting of the non-knitting needles is accomplished by the interaction of the gently sloping portion and the jack butt or cam follower. The apparatus results in a greatly longer life of the needles by avoiding impacts between the needle butts and the steepest portion of the stitch cam mechanism.
Inventors
- 👤 A Schindele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:51
CPC Classifications
D; D04; D04B; D04B15/00; D04B15/32; D04B15/66; D04B15/68
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
277 words
In a circular knitting machine, an arrangement for prolonging the life of jacks, needles, and cams of a circular knitting machine having a rotating cylinder and coacting stationary cam means, including a pluralIty of uniformly spaced stitch cam means, wherein a plurality of cylinder needles are operatively mounted in said cylinder for reciprocating movement in tracks of said cylinder, said cylinder needles being adapted to be moved into knitting and non-knitting positions, comprising in combination, a. each one of said cylinder needles having at least one radially projecting butt, b. a jack is pivotally connected to each cylinder needle, c. each jack having at least one radially projecting butt, d. a first stitch cam means having a steeply inclined cam surface, those of said cylinder needles which have been placed in their knitting positions being retracted by the coaction of said steeply inclined cam surface and said butts of said cylinder needles, e. a second cam means having a gradually inclined cam surface, f. those of said cylinder needles which have been placed in their non-knitting position do not come into contact with said steeply inclined cam surfaces and are actually retracted by the coaction of said gradually inclined cam surface and said butts of said jacks, g. common members for supporting both said first cam means and second cam means operatively mounted at each stitch cam of said stationary cam means, h. said second cam means having a wedge-shaped portion which coacts with said butts of said jacks to pivot the latter radially inwardly so that the butts thereof cannot engage said gradually inclined cam surface if the corresponding cylinder needle is in its knitting position.
Claim 2
Dependent Claim
277 words
In a circular knitting machine, an arrangement for prolonging the life of jacks, needles, and cams of a circular knitting machine having a rotating cylinder and coacting stationary cam means, including a pluralIty of uniformly spaced stitch cam means, wherein a plurality of cylinder needles are operatively mounted in said cylinder for reciprocating movement in tracks of said cylinder, said cylinder needles being adapted to be moved into knitting and non-knitting positions, comprising in combination, a. each one of said cylinder needles having at least one radially projecting butt, b. a jack is pivotally connected to each cylinder needle, c. each jack having at least one radially projecting butt, d. a first stitch cam means having a steeply inclined cam surface, those of said cylinder needles which have been placed in their knitting positions being retracted by the coaction of said steeply inclined cam surface and said butts of said cylinder needles, e. a second cam means having a gradually inclined cam surface, f. those of said cylinder needles which have been placed in their non-knitting position do not come into contact with said steeply inclined cam surfaces and are actually retracted by the coaction of said gradually inclined cam surface and said butts of said jacks, g. common members for supporting both said first cam means and second cam means operatively mounted at each stitch cam of said stationary cam means, h. said second cam means having a wedge-shaped portion which coacts with said butts of said jacks to pivot the latter radially inwardly so that the butts thereof cannot engage said gradually inclined cam surface if the corresponding cylinder needle is in its knitting position.
Claim 3
Dependent Claim
48 words
In a circular knitting machine, the arrangement as set forth in claim 1, wherein said stationary cam means includes a supporting ring coaxially disposed with respect to said rotating cylinder, said common supporting members for said first and second cam means being adjustably mounted in said supporting ring.
Claim 4
Dependent Claim
37 words
In a circular knitting machine, the arrangement as set forth in claim 2, including mechanical guide means coaxially mounted on said supporting ring for guiding said jacks from a radially inward position to a radially projected position.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |