Journal of the Textile Machinery Society of Japan

New Continuation and Automation System for Cotton Spinning

Ichisaburo Kaino

1963 Volume 9 Issue 2 Pages 62-75
Published: 1963
Released on J-STAGE: May 12, 2006

DOIhttps://doi.org/10.4188/jte1955.9.62

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Automatic Feedback Control of Woolen Card

Fumio Murakami, Susumu Kase, Toshio Shoman

1963 Volume 9 Issue 2 Pages 76-90
Published: 1963
Released on J-STAGE: May 12, 2006

DOIhttps://doi.org/10.4188/jte1955.9.76

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A series of field tests was made on feedback control equipment mounted on a woolen card to obtain a mathematical model describing its dynamic characterisrics.
Input signals to the control system, including the random noise generated by the photoelectrical measurement of web thickness, were then analyzed with the aid of statistical method to relate the above mentioned mathematical model to the actually measured values of roving weight variation.
It was found that the statistical methods of automatic control were highly useful for an accurate analysis of yarn-evening devices.

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Wear of Various Textile Guide Materials

Part 2: Effects of Parameters on Wear Rate of Copper Against Cotton Yarn

Kiyohisa Fujino, Kumeo Nakajima, Takashi Inoue

1963 Volume 9 Issue 2 Pages 91-100
Published: 1963
Released on J-STAGE: May 12, 2006

DOIhttps://doi.org/10.4188/jte1955.9.91

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Measurement of Electrification

Part 1: Analysis of Field-meter Indication

Norio Murasaki

1963 Volume 9 Issue 2 Pages 101-105
Published: 1963
Released on J-STAGE: May 12, 2006

DOIhttps://doi.org/10.4188/jte1955.9.101

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In making comparative measurements of a charged body with several types of field-meters, it is interesting to compare the indication made by one type with the indication made by another. Experiments we have made in this regard show that:
(1) The magnitude of an indication is a function of (a) the type of field meter, (b) the figure of the charged body and (c) the charge density.
(2) The magnitude of indication by one type cannot be taken as suggesting the magnitude by indication another type.
(3) There are cases where, although field-meter I indicates 30 KV and meter I1 indicates 1 KV for charged body A, they indicate 3 KV and 20 KV respectively, for charged body B.
Electrification cannot be measured sufficiently with an ordinary field-meter to form a basis for discussion of such phenomena. Sufficient measurement for the purpose can be made, however, with an earthed, large, circular mctal disk attached to the input terminal (inductive electrode of field-meter).
The following article discusses what radial length of disk is needed for measure- ment, what is the element of measurement, what is the indication by a meter, how to design a suitable field-meter and related questions.

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