"Ring armature of four pole dynamo; diagram of winding and connections, showing direction of the indced currents. the currents in the winding under the upper N and S poles are opposed to each other and flow to the external circuit by the positive brush 1, and back to this half of the armature by the negative brushes 3 and 4...The armature is said to be 'cross connected.' " -Hawkins, 1917

Ring Armature

"Ring armature of four pole dynamo; diagram of winding and connections, showing direction of the indced…

"In order to make the winding and connections clear, one coil and the commutator is shown assembled, although the latter is not put in place until after all the sections have been wound, the ends of the wires being temporarily twisted together until all can be soldered to the risers." — Hawkins, 1917

Siemens' drum winding

"In order to make the winding and connections clear, one coil and the commutator is shown assembled,…

"Testing the insulation resistance of a motor or generator from its winding to ground." —Croft 1920

Measure Insulation Resistance of Motor

"Testing the insulation resistance of a motor or generator from its winding to ground." —Croft…

"The screw is the sixth and last simple mechanical power. It may be consdered as a modification of the inclined plane, of as a winding wedge." -Comstock 1850

Screw

"The screw is the sixth and last simple mechanical power. It may be consdered as a modification of the…

"Illustrating the principle of Siemens' drum winding. In order to make the winding and connections clear, one coil and the commutator is shown assumbled, although the latter is not put in place until after all the sections have been wound, the ends of the wires temporarily twisted together until all can be soldered to the risers. the cores of these early machines were of wood, overspun circumferentially with iron wire before receiving the longitudinal copper windings." -Hawkins, 1917

Siemens' Drum Winding

"Illustrating the principle of Siemens' drum winding. In order to make the winding and connections clear,…

This stem winding watch is a mechanical watch which is wound automatically by the natural motion of internally rotating parts

Self Winding Watch

This stem winding watch is a mechanical watch which is wound automatically by the natural motion of…

"Core and edge strip winding for shunt field coils of large multipolar dynamo." -Hawkins, 1917

Winding

"Core and edge strip winding for shunt field coils of large multipolar dynamo." -Hawkins, 1917