We have already proposed a standard portrait for the assessment of preferable skin tone 1 . The present report describes a psychophysical experimental method, i.e., simultaneous triplet comparison that has been developed for the assessment of skin tone by using the portrait and that is characterized not only by a scalability, stability and reproducibility of the resulting scale values, but also by a reduced stress on observers. We have confirmed that the present simultaneous triplet comparison has a degree of scalability and stability almost equivalent to that of paired comparison that is most widely used for similar purposes, and that the stress on observers (expressed in terms of assessment time) is about half as much as that of paired comparison.
To trace the development of a full-automatic auto-doffer simple in mechanism and usuable in conventional spinning mills.The Doffer(1) The mechanism used is of an intermittent-movement and multi-spindle doffing system.(2) The width of the doffer is 189 mm. (3) Conventional ring frames and buildings may be used if there is a space of more than 300 mlii between the gear-end side (or out-end side) of a ring frame and a pillar.(4) One person can move the auto-doffer if an auto-doffer carrier is used. (5) The rails for the auto-doffer carrier need not be laid on the floor. (6) The doffing time per cycle is about 8 sec/10 sps. (7) The end-breakage rate for 10 ring frames as of June 1965 is about 2.5%.
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