GB540136A - Combined shaft bearing and coupling - Google Patents

Abstract

540,136. Combined shaft coupling and bearing; electric switches. DEHN, F. B. (Globe-Union, Inc.). April 4, 1940, No. 6107. [Class 80 (ii)] [Also in Group XXXVII] An instrument adjusting device comprises a shaft 16 rotatably coupled to a bearing bush 25 rotatable in a fixed bearing sleeve 17, the shaft 16 being detachably secured against axial movement by a springy projection 38. As shown, for a volume control device, the shaft 16 is formed from a flat strip of material and is slotted and bent to form two projections 38. The shaft passes through a slot 30, Fig. 2, formed in one end 27 of the bushing 25. The end 27 has a peripheral flange 28. and the other end has tabs 29 which pass through slots, similar to the slots 30, formed in an insulating disc and in a member 31, the ends of the tabs being bent over at 29<SP>1</SP>. The member 31 is a combined rotatable stop member and switch operator. A disc 15 carries a contact 14 adjustable around a conductive strip 13 applied to the inner wall of a casing 11, the latter, together with the bearing sleeve 17, being clamped to a supporting member 19. In a modification the flange 28 is slotted to receive shoulders 34 on the shaft 16 and the slot 30 is formed at the other end of the bushing 25. In another modification, a pair of volume control devices are mounted side-by-side on a shaft. In Fig. 16, the invention is applied to a step-by-step or all-wave switch. The stator 90 is fixed to a frame 92 carried by the bearing sleeve 98 and has clips 96. The rotor 93 carries contacts 97 which provide the required switching action and maintain the rotor and stator in the same plane. The extremity 120 of the shaft 95 engages a rectangular slot in the rotor for rotary adjustment thereof.