US3690123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the automatic measurement of the length of yarn consumed in knitting machines
Assignee: Institut Français du Textile et de l'Habillement
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Filing: 1970-03-09
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Granted: 1972-09-12
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Expires: 1990-03-09
Abstract
Abstract The invention relates to a method of and device for displaying the length of yarn used in making a given number of stitches on a knitting machine. With regard to the dimensions of the device microswitches are set to be activated at an interval of time during which the machine knits a selected number of stitches different from said given number. Electrical pulses are generated as the yarn is fed and are counted during the interval between activation of the microswitches. The length of yarn used in making the given number of stitches is displayed on the counter.
Inventors
- 👤 Jean-Paul Delair
- 👤 Jean-Pierre Raisin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:28
CPC Classifications
D; D04; D04B; D04B35/00; D04B35/10; D04B15/00; D04B15/38
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
167 words
A device for measuring the length of yarn used in a given number of stitches by a knitting machine, said device comprising in combination: a. a feeder rotated by said yarn b. a pulse generator for generating pulses as said feeder rotates c. an output element connected to said pulse generator d. a counter connected to said output element e. first and second microswitches actuatable on operation of the machine f. a first circuit between said first microswitch and said output element g. a preselection counter connected to said first microswitch, and adapted selectively to pass a selected pulse h. a second circuit including said second microswitch connecting said preselection counter to said output element whereby a pulse from said first circuit to said output element causes said output element to pass pulses from said pulse generator to said counter and a pulse from said second circuit to said output element causes said output element to cease to pass pulses from said pulse generator to said counter.
Claim 2
Independent Claim
167 words
A device for measuring the length of yarn used in a given number of stitches by a knitting machine, said device comprising in combination: a. a feeder rotated by said yarn b. a pulse generator for generating pulses as said feeder rotates c. an output element connected to said pulse generator d. a counter connected to said output element e. first and second microswitches actuatable on operation of the machine f. a first circuit between said first microswitch and said output element g. a preselection counter connected to said first microswitch, and adapted selectively to pass a selected pulse h. a second circuit including said second microswitch connecting said preselection counter to said output element whereby a pulse from said first circuit to said output element causes said output element to pass pulses from said pulse generator to said counter and a pulse from said second circuit to said output element causes said output element to cease to pass pulses from said pulse generator to said counter.
Claim 3
Dependent Claim
24 words
A device as claimed in claim 1 further comprising a disc attached to said feeder, and alternate reflective and non-reflective segments to saId disc.
Claim 4
Dependent Claim
33 words
A device as claimed in claim 2 wherein said pulse generator comprises a light source and a photocell adjacent said disc to pick up light reflections from said reflective segments of said disc.
Claim 5
Dependent Claim
28 words
A device as claimed in claim 1 further comprising a member to said machine rotatable with said machine, and a dog on said member to actuate said microswitches.
Claim 6
Dependent Claim
21 words
A device as claimed in claim 4 wherein said microswitches are adjustable to be actuated by said dog at different intervals.
Claim 7
Dependent Claim
53 words
A device as claimed in claim 1 further comprising a third circuit including an intermediate element and a diode connected to said output element and a two way switch connected to said preselection counter and switchable to connect said preselection counter respectively a. to said second circuit or b. to said third circuit.
Claim 8
Dependent Claim
14 words
A device as claimed in claim 6 wherein said intermediate element is a thyristor.
Claim 9
Dependent Claim
19 words
A device as claimed in claim 1 further comprising a function selector and a diode in said first circuit.
Claim 10
Dependent Claim
31 words
A device as claimed in claim 1 wherein said second circuit additionally comprises an intermediate element energizable by a pulse from said preselection counter, and a control element and a diode.
References Cited (Backward Citations)
US3099142A
Cited
US3293760A
Cited
FR1470626A
Cited
FR1470628A
Cited
US3408500A
Cited
US3539782A
Cited
US3550400A
Cited
US3566134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |