GB386825A - Improvements in or relating to electric motors with starting gears - Google Patents

Abstract

386,825. Motor driving-arrangements. STEPHAN-GETRIEBE GES., 4<III>, Hakenstrasse, Bremen, Germany. March 19, 1932, No. 8244. Convention date, Oct. 20, 1931. [Class 35.] In order to provide gradual loading of electromotors and thus allow the usual electric starter to be omitted, the torque is transmitted through epicyclic gearing of which the loose planet-carrier is either directly braked or indirectly retarded by braking a member geared thereto, the gear and braking-means being enclosed in the motor casing. The brake operating-gear may be so interconnected with the motor control switch that the current is controlled by operation of the brake. Brake shoes 3, Figs. 2 and 3, pivoted to the housing 1, can be gradually applied to a drum &c. 2 carrying planet-wheels 8, 9 meshing with driving and driven sun-wheels 7, 10. The sun-wheel 7 may be directly secured to the motor-shaft 6 or, as shown, driven therefrom by layshaft reduction or speed-up gearing 13 . . 17. Alternatively, the layshaft gearing may be interposed between the wheel 10 and shaft 12. In a modification, Fig. 4, the carrier 2 can be alternatively retarded indirectly by braking a further loose member 20 geared to a third pinion 18 on the planet-shaft 11 to yield a different final speed ratio. The Specification as open to inspection under Sect. 91 contains statements to the effect that an intermediate gear-wheel can be inserted between the wheels 7, 8 or 9, 10; and that the modification shown in Fig. 4 produces reversed drive. This subject-matter does not appear in the Specification as accepted.