Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1984-09-26
1987-01-20
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250227, 356387, G01B 1102, G01B 1108
Patent
active
046381694
ABSTRACT:
Optical measuring devices for textile yarns require a homogeneous measuring field in order not to interpret changes in position of the yarn as additional changes in the cross-section or diameter. To form a homogeneous measuring field, it is proposed to insert in each case one light guide between the light source and the measuring field or between the measuring field and the light receiver, the purpose of the said light guide being to achieve a homogeneous light distribution in a measuring field intercepted by the yarn by means of internal reflection of the light passing therethrough. Such light guides can be made of transparent plastic and have the advantageous property that they can be curved, folded or twisted without the light guided by them escaping through the surface. By polishing or mirror-coating the surface of the light guides, the dispersion can be further reduced. The length of the light guides is also decisive as regards the degree of homogenization of the light flux in the measuring field; that is, the longer the guide, the more homogeneous the emerging light flux. Optical measuring devices of the said type can be used as sensors for at least approximate cross-section measurements in yarn scouring.
REFERENCES:
patent: 3221171 (1965-11-01), Locher
patent: 3248554 (1966-04-01), Chen
patent: 3619626 (1971-11-01), Rudolph
patent: 4037968 (1977-07-01), King et al.
Allen Stephone B.
Nelms David C.
Zellweger Uster Ltd.
LandOfFree
Measuring device for measuring the cross-section of textile yarn does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Measuring device for measuring the cross-section of textile yarn, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measuring device for measuring the cross-section of textile yarn will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2136130