| 摘要 |
<p>1,113,214. Making waveguides. COMPAGNIE ELECTRO-MECANIQUE. 5 Aug., 1965 [6 Aug., 1964], No. 33556/65. Heading H1W. A waveguide is made from a thin metallic shell 11 and two layers 13, 14 of synthetic material, e.g. polyester, epoxide or silicone resin, the first (13) of which is applied and polymerized under pressure, the second (14) of which is applied and polymerized without pressure. The shell 11 is shaped, e.g. to rectangular section, from a metallic tube by application of an expansible mandrel consisting of two wedgeshaped parts. A four-part mandrel may be used to shape cross-sections having rounded shorter sides. In order to absorb differential expansion between metal and resin, a layer of suitable material may be interposed between the shell 11 and the layer 13. A two-part mould is used for application of layer 13. Both layers may incorporate several windings of glass fibre which are wound alternately in opposite directions. The outer layer 14, applied without a mould, serves for location of flanges 2. An end portion 1 la of the metallic shell is bent into the form of a flange and attached to the outer surface of the flange 2 by means of an adhesive layer of synthetic elastomer whereby a sealing contact between adjacent sections is achieved.</p> |
