Communications: electrical – Systems – Call station
Patent
1976-06-10
1978-03-07
Caldwell, Sr., John W.
Communications: electrical
Systems
Call station
73160, 226 44, 242 7544, G08B 2100
Patent
active
040782310
ABSTRACT:
A method and apparatus for monitoring the production of spun yarn in an open end rotor spinning machine. The spun yarn is withdrawn from the open end rotor spinning machine at a constant rate of speed. As a result of changes in mass of the yarn created by flaws therein, the centrifugal force within the rotor varies causing the tension in the yarn to vary accordingly. As the yarn is withdrawn from the rotor, it passes around a spring loaded arm which is displaced according to the centrifugal force applied to the yarn. The spring loaded arm is operately connected to a balance bridge circuit which generates an output signal corresponding to the displacement thereof. The output signal from the balance circuit is then fed to an integrator which integrates the signal to produce a slowly varying integrated reference signal. The output signal from the bridge circuit is also converted into a short time or instantaneous signal that is compared with the integrated signal for producing an out of tolerance signal if and when flaws occur in the yarn. The system produces an out of tolerance signal resulting from thin spots, thick or heavy spots, and/or breaks within the yarn.
REFERENCES:
patent: 2983464 (1961-05-01), Fuller
patent: 3458151 (1969-07-01), Eastcott
patent: 3497154 (1970-02-01), Lasarev et al.
patent: 3594755 (1971-07-01), Emmasingel
patent: 3667664 (1972-06-01), Schroeder
patent: 3725889 (1973-04-01), Glosek
patent: 3731069 (1973-05-01), Goto et al.
patent: 3912145 (1975-10-01), Meihofer
patent: 4007457 (1977-02-01), Aeppli
Artzt Peter
Bauer Herbert
Egbers Gerhard
Tabibi Sohrab
Caldwell Sr. John W.
Groody James J.
Schubert & Salzer
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