| 摘要 |
950,853. Moulding stator supports. TROLEX CORPORATION. June 2, 1960 [Feb. 1, 1960], No. 19604/60. Heading B5A. A stator for a rotary switch is formed by punching perforations 21 into a strip of metal 20 so as to form radially disposed fingers 14, each carrying hemispherical projections 24, half of which are located on each side of the strip 20, rolling the strip up, Fig. 9 (not shown), adjacent turns being separated by the projections, washing it in a bath of cleaning solution, locating it in a mould; Fig. 7, and then injecting plastic material containing fibre-glass through gate 30 into the mould cavity 29. The plastic material is guided by the inner surfaces 25 of the projections 24, Fig. 8, from one side of the strip to the other causing a differential rate of flow on opposite sides of the strip, and the projections 24 are embedded in the moulded ring 11. The strip is then fed to a punch press and the ends of the fingers are stamped out to form contacts, Fig. 1 (not shown). |
