GB106127A - Improvements in or relating to Variable-speed Gearing. - Google Patents

Abstract

106,127. Zweigbergk, T. von. May 8, 1916. Machines with two or more armatures.-Epicyclic variable-speed gearing is associated with a dynamo-electric machine comprising two concentric armatures A<2>, C<1> and common stationary fieldmagnet poles F, one armature C<1> being connected to the retarded element B<6> of the gearing and used as a generator, and the other armature A<2> being used as a motor driven by the generator. The two armatures and the windings F<1> on the field-magnet-poles are all connected in series, and the electrical control is effected by the movement of the brushes A<4>, C<2> of one or both machines. The armature A<2> is secured to a spider A' on the end of the driving-shaft A which is connected to a second shaft B by a dog-clutch B'. At the other end of the shaft B, there is secured a pinion B<2> which meshes with an idler planet wheel (not shown); this planet wheel meshes with a planetary pinion B<4> which is formed integral with or is connected to another pinion B<5> which in turn meshes with a pinion B<6> mounted on a hollow shaft C to which is secured the armature C<1>. The planetary wheels B<4>, B<5> are mounted at the end of the driven shaft E. The gear train is chosen so that, when the shaft E is held stationary and the shaft B acts as the driving-shaft, the armature C<1> is driven at twice the speed of the armature A<2> but in the opposite direction. The armature C<1> is provided with one half the number of conductors that the armature A<2> has. The shaft E is driven at different speeds, or in the reverse direction, by suitably adjusting the brush-rocker arms A<6>, C<3> of the two armatures so that the wheel B<6> is either rotated at a diminishing speed to increase the speed of the shaft E or' is rotated in the reverse direction by the armature C<1> acting as a motor to obtain a reverse drive of the shaft E.