Page:Canadian patent 30172.djvu/6

 In illustration of the details of construction which the invention involves, reference is made to the accompanying drawings. The Figure being a diagram of the converter and the generator with their proper electrical connections.

A is a core which is closed upon itself, that is to say, it is of an annular, cylindrical or equivalent form; and as the efficiency of the apparatus is largely increased by the subdivision of this core it is made of thin strips plates or wires of soft iron electrically insulated from one another as far as practicable. Upon this core by any well known method are wound, for example, four coils B B B' B' which constitute the primary coils and which are composed of long lenths of comparatively fine wire. Over these coils shorter coils of coarser wire C C C' C' are wound which constitute the induced or secondary coils. The construction of this or any equivalent form of converter may carried further by enclosing these coils with iron, as, for example, by winding over the coils a layer or layers of insulated iron wire.

The device is provided with suitable binding posts to which the ends of the coils are connected. The diametrically opposite coils B B and B' B' are connected respectively in series and the four terminals are connected to the binding posts. The induced coils are connected together in any desired manner. For example, coils C C may be connected in multiple arc when a quantity current is desired, as for running a group of incandescent