(under subclass 188) Insulators in which the insulating body is secured within the cap terminal by means including a ring, wedge, or other similar element interposed between the cap and the insulating body.
(1) Note. Where in addition to such interposed element a plastic bonding material is employed, the patent is placed in this class, subclass 189 and cross-referenced here.
(2) Note. For insulators having pin-type terminals secured by interposed rings or wedges, see this class, subclass 198.