Patent GB-131699-A (GB)
IPC: G08C19/38
Abstract: 131,699. BÚnard-Barbier et Turenne, and Granat, E. Aug. 15, 1918. Sights and methods of sighting. - Consists in electric mechanism for co-ordinating the movements of the guns and instruments of an antiaircraft system, in which the emitting and the receiving stations are provided with direct-current motors each adapted to act either as a transmitting or a receiving instrument and comprising (a) a stator provided with direct current winding connected to a fixed collector ring and connected by three wires to the stator of the other motor, (b) a rotor provided with a closed winding connected to two contact rings, and (c) two brushes fixed on the shaft of the rotor and operating on the collector ring for the purpose of distributing the current in the stator windings. The receiving-motor may be utilized for the direct actuation of a gun or the like, as a transmitter of orders, or as a controlling-motor for a main actuating-motor. In Fig. 1 are shown two instruments, one at the transmitting-station I and the other at the receiving-station II. Each comprises a stator S<1> or S<2>, and a rotor R<1> or R<2>. The stator has a continuous-current winding connected to a collector ring C<1> or C<2>. The two stator windings are connected by three lines l<7>, l<8>, l<9>, the terminals of which are equally spaced on the windings. The rotor has a closed winding terminating in two contact rings. On the shaft of the rotor are keyed the brush-holders B<1>, B<2>, which slide over the collector C<1> or C<2> as the rotor revolves. The instruments are fed by the continuous-current line L in such a way that the stator S<1> of the transmitting-instrument is fed through the switch D<1>, wires l<1>, l<2>, and brushes B<1>, and the rotor R<2> of the receiving-instrument through the switches D<2>, d<2> and wires l<5>, l<6>. When the rotor R' of the transmitting instrument is rotated by hand, the stator winding becomes a seat of alternating currents which by means of the connecting lines l<7>, l<8>, and l<9> are reproduced in the receiving-stator. This gives rise in the latter to a rotary flux which causes the rotor R<2> to rotate with the same velocity as the rotor R<1>. Instead of rotating the rotor R' by hand it can be rotated electrically by feeding it with current through the switch d<1>. The system is reversible so that the apparatus II can be the transmitter and I the receiver. In a modification, for longdistance transmission, the stator is provided with a secondary winding. Fig. 6 shows the application to a motor for the actuation of a heavy gun or a search-light. The controlling- motor I and the actuating-motor II are both connected by differential gear to a switch 9, 10 which controls the current to the motor II. The brushes 9 of the switch are keyed to a shaft 8 which is first rotated by the controlling-motor I through the differential gear to start the motor II, and is then rotated back to ths initial position by the motor II through the differential gear to stop the motor II. Fig. 8 shows the invention applied to a training-indicator for field guns. The distantlycontrolled motor and the hand-wheel V of the training-gear are connected through differential gear to a shaft carrying an indicating-disk 14. After the disk has been rotated by the motor E it is brought back to zero by rotation of the training-wheel V and the gun is then correctly trained. When applied to the elevating-gear of a field gun, Fig. 10, the distantly-controlled motor F displaces a level 31 which is then brought back to zero by the gun-elevating gear. The invention can also be applied to sight-actuating mechanism. Fig. 15 shows the invention applied to a long-base rangefinder in which the telescopes at the two posts A, J actuate instruments S<1>, R<1> which transmit the angles to a central station having two receiving- instruments S<2>, R<2> and two pointers. If the transmission of orders is effected always in the same direction, the construction of the receiving- apparatus can be simplified by dispensing with the collector ring and rotating brushes. The whole anti-aircraft system is shown diagrammatically in Fig. 16, the lower part of which represents the apparatus at the central control station. The movements of the listening-post G are indicated at the central station by a pointer O<1>, and of the search-light P and telescope H by a pointer O<2>. The guns U, U<1>, U<2>, U<3> are controlled by receiving-apparatus n<1>, n<2>, &c. connected to the transmitting-apparatus r<2>, r<3>, &c., the rotors of which are rigidly connected to a shaft K adapted to be rotated by a hand-wheel Q<2> which is operated to cause a pointer Q<1> to follow the movements of the pointer O<1>. The rotor of the transmitting- appara.tus can be adjusted on the shaft K to converge or diverge the fine of the battery.