Patent GB-191006312-A (GB)
Title: Improved System of Generating and Distributing Electricity for Motor Cars.
Inventor: HALL ROBERT FREDERICK
Filed: 1910-03-14
Granted: 1911-03-14
Abstract: 6312. Hall, R. F. March 14. [Cognate Applications, 8155/10, 9926/10, 12,893/10, and 17,330/10.] Switchboards; switches. - In a two-battery lighting system for motor - cars &c., a handoperated reversing-switch for changing the connexions between the dynamo and the batteries, the switches controlling the lamps &c. on the car, and a voltmeter and ammeter are mounted in a casing on the dash-board of the car. The rotary change-over switch 2 and lamp switches 11, 12, 13 are contained in a metallic casing 113 which also contains an ammeter and a voltmeter, Figs. 12 and 13. The ends of the lead covering of the cables are embraced and clamped in position by a screwed-on cover 124 having grooves which fit over the cables, similar grooves being provided in the back of the casing.. The lamp switches 11, 12, 13 are of the tumbler type. The rotary switch 2 comprises a disk 125 of insulating-material attached to a metallic plate 126 carried by a spindle 127 provided with a handle 128. The base plate 129 carries an insulated metallic ring 130 and two semicircular segments 131, 132, Fig. 17 ; the ring 130 being connected to the lamp switches 11, 12, 13 ; while the segment 131 is connected to the positive terminal of one battery and the segment 132 to the positive terminal of the other battery. The base 129 also carries a contact stud 138 connected to one contact of the ignition interrupter and a contact stud 139 connected to the other contact of the interrupter through the induction coil of the ignition system. The disk 125, Fig. 16, carries spring contacts 142, 143, an earthed spring finger 144, and spring contacts 146, 148 connected by an arm 147 which arm engages the positive stud 136 on the base 129. The switch is allowed to move in one direction only by means of a spring pressed pawl and notches in the periphery of the movable part. Centrifugal switches, one for cutting in the dynamo at a definite speed and the other for cutting it out at a predetermined higher speed, are mounted on the dynamo spindle. The centrifugal switch for cutting in and out the generator at low speeds consists of two segmental metallic pieces 56, 57, Fig. 7, independently hinged by links 58, 59 and 60, 61 to a revolving part 21 through lugs 64, 65. The outer end of the part 21 is bored out and slotted at 68, 69 to receive the arms 70, 71 of a copper disk 72. The arms 70, 71 carry platinum contacts 78, 79 adapted to engage similar contacts 80, 81 on the parts 56, 57 when the parts are moved against the action of the springs 82, 83 by centrifugal force. The switch for cutting out the dynamo above a predetermined speed is similar in construction with the exception that the contacts are normally engaged and are separated by centrifugal action. To prevent both pairs of contacts becoming pitted due to arcing, it is arranged that one pair shall separate before the other so that wear will occur at that pair only. Rotary distributors and interrupters. - The rotary distributing switch and interrupter, Fig. 5, is mounted upon a shaft 50 driven from the dynamo spindle through worm-gearing 51, 52. The shaft 50 is mounted in an adjustable footstep bearing, the position of which is varied by means of a pivoted lever 53, thereby advancing or retarding the ignition.