A typewriter in which the work of printing or of pressing the type faces
against the paper, or printing ribbon, is done by electro-magnetic
attraction. The keys close electric circuits, throwing the
electro-magnetic action into play. This involves the use of electricity
for what is ordinarily only a mechanical process. The strength of the
impression, however, is independent of the touch of the operator. It has
not come into very extensive use.

[Transcriber's note: IBM introduced widely used electric typewriters in
1935.]