Untitled

New Zealand Herald, Volume LXIX, Issue 21296, 24 September 1932, Page 4 (Supplement)

Here Is a sketch in which I have endeavoured to show you in simple, although somewhat fanciful fashion, an electric circuit between- a generator and this lamps and appliances which it supplies. M is the field magnet and C one of the large number of revolving coils in which the current is induced. CR denotes the collector rings secured to the revolving shaft. The ends of the coll are connected to these rings. The brushes (B) press on the rings and pick "Up the current from the coll. M\V denotes the main supply wires. There are three switches, S; one for the lamp L. one for the radiator RAD. and you will notice that the right-hand switch controls three lamps. Flex is the flexible cord to the radiator. The flexible cord is made up of two conductors, insulated from each other and each composed of many fino copper wires stranded together. These, of course, provide greater flexibility than two thick single wires would give. The arrows indicate the direction of the flow of the current. It should bo mentioned that a generator of the type shown is termed an "'alternator" because the current flows alternately in one direction and then in the other The current in the upper portion of the coil is supposed to be flowing toward you, as the arrow shows. When the coil has turned around so that this part is passing the lower pole of the magnet, the current will flow in the . reverse direction.