Improvements in the manufacture of knob handles

摘要

507,609. Knobs. NEWTON, R W. Dec. 18, 1937, No. 35086. Convention date, July 1. [Class 52 (i)] . A hollow moulded knob is formed in two hemispherical parts 9, 11 one of which is apertured at a thickened part 18 to form the bearing, for a fixing pin on which the knob rotates.