Improvements in and relating to radio-frequency inductance coils

摘要

644,939. Inductances. KOLSTER BRANDS, Ltd. March 25, 1948, No. 8752. [Class 38 (ii)] Fine adjustment of the inductance value of a high-frequency inductance coil is effected by applying to a portion of the surface of the coil structure, lying within the magnetic field of the coil, a finely-divided metallic material carried in a quick-drying adhesive such as a cellulose varnish or molten wax. Magnetic and non-magnetic conductive materials are respectively used to increase and decrease the inductance value.