Patent GB-190418185-A (GB)
Title: Improvements in Means for Controlling Electric Power Distributing Systems.
Inventor: ROUTIN JOSEPH LOUIS
Filed: 1904-08-22
Granted: 1905-08-22
Abstract: 18,185. Routin, J. L. Aug. 22. Dynamos, regulating.-Relates to the regulation of generators in accordance with the load, an auxiliary generator and motor being employed to vary the field strength. The speed and voltage may be maintained constant or increased with the load. Simultaneously the prime mover may also be controlled. Fig. 1 shows an arrangement for keeping the speed and electromotive force of a generator constant. The generator G has a field D in series with which a rheostat R is provided. The resistance is varied in accordance with the potential difference by a coil H, the core of which is attached to a rod A carrying the mercury cup C. An auxiliary generator is provided having an armature g which may be on the same shaft as the main shaft. Its field has two oppositely-wound coils, one s in series with the main circuit and the other a potential winding d in series with a variable resistance r. Normally the coils neutralize one another. The auxiliary generator serves, when excited, to drive a small motor M, which is adapted to vary the resistance r and also, by screwing up a rod k<1>, to adjust the rheostat R, and may also regulate the prime mover. The centrifugal or other governor V also controls the rheostat R through the rods k, k<1> and sleeve f. The sensitiveness of the apparatus can be increased by arranging several auxiliary generators in cascade. Instead of the coil H acting directly on the rheostat, it may be arranged to close a relay control circuit. In a similar way the rods k, k<1> may control the relay circuit, or the lever A directly. Fig. 2 shows such an arrangement. The core N is connected to a rod pivoted at P and to a link B pivoted to the rod A' adapted to make either of the contacts shown. The rod A<1> is also pivoted on a rod provided with springs Y<1>, Y<2>. This rod is connected to an arm U pivoted at Q and oscillated by the rod k<1>. The relative movement may be varied by adjusting the connection with the slotted part J of the rod U. The operation of the regulating-means for the prime mover, which in some cases require considerable force, may be done indirectly, e.q., through a servomotor. Fig. 3 shows an arrangement for regulating a turbine, the sluices being moved by a hydraulic motor. The water under pressure is admitted through the tubes e<1>, e<2>, and discharged through the tube j. The rod P of the differential piston acts on the sluice stops, and the rod b which carries the pivot O<1> of the lever L<1> is connected to the stops and takes part in their displacement. The rheostat may be arranged to give a regular progressive variation in the current, and similar arrangements can be used with alternating currents. In the form shown in Fig. 4, the moving contact A carries projecting contacts l<1>. l<2> l<3>, l<4> adapted to engage the fixed contacts p1, p2, &c. The contacts l<1> &c. may be connected through resistances, or be made of suitable resistant material. The rod k, k<1> can be fixed in length, and the motor M made to act on the rod through worm gearing and a chain.