EP0056619A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Yarn feeding finger control device for a circular knitting machine, in particular a single cylinder hose knitting machine
Assignee: Lonati SpA
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Filing: 1982-01-14
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Granted: —
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Expires: 2002-01-14
Abstract
Abstract For selectively controlling yarn feeding fingers (2) in a circular knitting machine the yarn feeding fingers (2) whereof are individually pivoted to a stationary structure (4) and movable between a rest position and an operative one, with the drive ends (2b) of the feeding fingers (2) there are associated respective electromagnets (11) the movable armatures (12) whereof act as by thrust application on the respective drive ends (2b) of the yarn feeding fingers (2). The selective energization of the various electromagnets (11) is accomplished through a memory device driven by a photoelectric unit located astride a disk formed with peripheral notches and made rigid with the machine main drum. Each forward step movement of the drum results in the sending of one or more pulses from the photoelectric unit to the memory device, wherein the knitting program is stored such that for each pulse or number of pulses there correspond an energization or de-energization control impulse to a given electromagnet (11).
Inventors
- 👤 Francesco Lonati
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 03:46
CPC Classifications
D; D04; D04B; D04B15/00; D04B15/66; D04B15/80; D04B15/38; D04B15/54; D04B15/58
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
180 words
A yarn feeding finger control device for a circular knitting machine, in particular a single cylinder hose knitting machine, comprising a plurality of yarn feeding fingers (2) pivoted individually to a stationary structure (4) of the machine and selectively movable between a rest position whereat one yarn guiding end (2a) thereof is moved away from the needles (7) and the respective yarn (6) is not picked up thereby, and an operative position whereat said..end (2a) is moved closer to the needles (7) and the yarn (6) is picked up thereby, the selective movement being accomplished by program controlled means, characterized in that with the yarn feeding fingers (2) there are associated respective electromagnets (11) for moving the yarn feeding fingers (2), and that a means (13) is provided for detecting the movement of a mechanical programming member (14) of the machine, as well as a memory device (15) electrically connected to said detecting means (13) and.driven thereby to selectively energize and de-energize individual electromagnets (11) in accordance with the advancing movement of said mechanical programming member (14) of the machine.
Claim 2
Dependent Claim
180 words
A yarn feeding finger control device for a circular knitting machine, in particular a single cylinder hose knitting machine, comprising a plurality of yarn feeding fingers (2) pivoted individually to a stationary structure (4) of the machine and selectively movable between a rest position whereat one yarn guiding end (2a) thereof is moved away from the needles (7) and the respective yarn (6) is not picked up thereby, and an operative position whereat said..end (2a) is moved closer to the needles (7) and the yarn (6) is picked up thereby, the selective movement being accomplished by program controlled means, characterized in that with the yarn feeding fingers (2) there are associated respective electromagnets (11) for moving the yarn feeding fingers (2), and that a means (13) is provided for detecting the movement of a mechanical programming member (14) of the machine, as well as a memory device (15) electrically connected to said detecting means (13) and.driven thereby to selectively energize and de-energize individual electromagnets (11) in accordance with the advancing movement of said mechanical programming member (14) of the machine.
Claim 3
Dependent Claim
78 words
A device according to Claim 1, characterized in that said mechanical programming member. (14) is the machine main drum, and that said detecting means (13) comprise.s a photoelectric unit (19) adapted for supplying electric pulses to said memory device (15) at each advancing step of said drum (14), the memory device (15) being effective to selectively and sequentially control the energization and de-energization of individual electromagnets (11) in accordance with the pulse sequence from said photoelectric unit (19).
Claim 4
Independent Claim
53 words
A device according to Claims 1 and/or 2, characterized in that said detecting means (13) comprises a disk (17) rotatively rigid with said drum (14) on one side thereof and formed with a plurality of peripheral notches (18), and a pair of photoelements arranged to be stationary with respect to said disk (17).
Claim 5
Dependent Claim
22 words
A device according to Claim 3, characterized in that several notches (18) are provided for each advancing step of said drum (14).
Claim 6
Independent Claim
68 words
A device according to one or more of the preceding claims, characterized in that the yarn feeding fingers (2) arranged alongside a center yarn feeding finger (2) have control ends -( 2b), opposedly located to the yarn guiding ends (2a), arranged on further outboard planes, different from the planes of movement of the respective yarn feeding fingers (2), and that said electromagnets (11) are staggered in several rows.
Claim 7
Independent Claim
35 words
A device according to one or more of the preceding claims, characterized in that said electromagnets (11) are provided with rod armatures (12) effective to apply a thrust action on said yarn feeding fingers (2).
Claim 8
Dependent Claim
27 words
A yarn feeding finger control device for a circular knitting machine, in particular a single 3 cylinder hose knitting machine, substantially as 4 herein described and illustrated.
Claim 9
Dependent Claim
27 words
A yarn feeding finger control device for a circular knitting machine, in particular a single 3 cylinder hose knitting machine, substantially as 4 herein described and illustrated.
References Cited (Backward Citations)
No citation records indexed.
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