| 摘要 |
<p>989,349. Rollers: heating arrangements. T.M.M. (RESEARCH) Ltd. Sept. 14, 1962 [Sept. 26, 1961], No. 34478/61. Heading D1D. [Also in Division H5] In a textile processing machine, yarn or fibre to be heated is caused to pass over a magnetizable, cylindrical shell 12 which is mounted on a rotatable driving shaft 13 and surrounds a stationary magnetic core 18 carrying an electric coil 20. Magnetic flux generated in core 18 by passage of alternating current through coil 20 produces a heating effect in shell 12. The core 18 is mounted on a stationary sleeve 17 surrounding shaft 13, and may compruse a solid block or laminations extending parallel to the rotary axis, and cut away to house coil 20. As shown a thermistor 21 is embedded in roller 12 and connected, through slip ring 22 and contact 23 to the power supply to maintain the roller at a constant temperature. A second thermistor 30 is connected through slip ring 29 to one input terminal of a scanning switch which connects a temperature indicator in turn to thermistors in successive heated rollers of the textile processing machine. A further slip ring 28 on shaft 13 provides a common earth reference potential.</p> |
