Process and apparatus for counting yarn breakages

Details Process and apparatus for counting yarn breakages Process and apparatus for counting yarn breakages

1975-07-11

1976-12-07

Petrakes, John

Textiles: spinning, twisting, and twining

Apparatus and processes

Web material

57 81, 57156, 340259, D01H 1332

Patent

active

039954170

ABSTRACT:
An electrical process and device are described wherein interruptions in the passage of yarn from a series of supply bobbins, used in succession, to a wind-up bobbin are detected by a yarn breakage surveying device that transmits an impulse for each interruption. Some of these interruptions are due to supply bobbin changing and others to yarn breakages. Only the interruptions due to breakages are transmitted to a counter by way of a gate that receives the said impulses as well as periodic signals from a timing device. The timing device is actuated for spaced periods initiated by signals from a differentiating circuit for each change from "no yarn" to "yarn present" indicated by the surveying device, the latter being connected to the differentiating circuit as well as directly to the timing circuit. Each timing circuit period is limited to a total which is less than the average period required for each supply bobbin to unwind, but for each yarn breakage a gap appears in an associated one of the periods, the gate transmitting an impulse to the counter only when such a gap arises.

REFERENCES:
patent: 3114233 (1963-12-01), Guri
patent: 3158852 (1964-11-01), Schacher
patent: 3430426 (1969-03-01), Bryan, Jr. et al.
patent: 3523415 (1970-08-01), Suzuki
patent: 3660972 (1972-05-01), Neill et al.
patent: 3673591 (1972-06-01), Schwartz
patent: 3680298 (1972-08-01), Saunders
patent: 3680299 (1972-08-01), Lee, Jr.
patent: 3772524 (1973-11-01), Erbstein

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