| 摘要 |
430,091. Insulating cable joints by extrusion - machines. ELECTRICAL RESEARCH PRODUCTS, Inc., 195, Broadway, New York, U.S.A.-(Assignees of Malm, F. S. ; 936, Ridgewood Road, Millburn, New York, U.S.A.) Dec. 13, 1933, No. 35130. Convention date, Dec. 29,1932. [Class 87 (ii)] [See also Group XXXVI] For making good the insulation after the jointing of cables, the cable is inserted in clamps 23 and stretched by separating the standard 20 from the fixed standard 19 by the screw-mechanism 21. The supports are then moved laterally on the guides 12 until the cable enters the open side 35, Fig. 2, of an extrusion head, with the joint well clear of the left hand side of the head as viewed in Fig. 1. Perforated tapered dies in mating halves are then placed on the cable between the head and the joint and the cable is then fed axially through the head by rotation of the screw 13<a> either by hand from the crank 14 or by power from the clutch 15 engaged by operating the handle 18. The dies travel with the cable until they wedge in the head, after which the continued movement of the cable draws the joint through the dies. Insulating strip material from the reservoir 24 is masticated by the rollers 25 and then delivered by the tapered feed screw 27 through the tapering valved outlet 28 leading to the extrusion head, thence passing through the orifices in the dies to the cable. Byepass conduits 33 may be opened to allow some of the material to escape to the exterior of the machine in order to equalize the pressure at opposite sides of the dies and to fill all the parts of the machine at starting, before making a joint. The extrusion head is of massive construction with walls approximately equal in thickness to the radius of the die orifice. The casing of the feed screw is electrically heated, and the size of the outlet die is controlled by the sliding members 29 operated by screw-mechanism 30 working in conjunction with a pointer 31 and scale. The subject-matter of Specification 389,874 is disclaimed.
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