Radio, miracle of the 20th century ... a story of human achievement that stands unrivalled in the history of humanity, together with a colorful portrayal, giving a broad, general view of the whole subject of wireless telegraph and telephone and its marvelous development (1922)
Drinker, Frederick E. [from old catalog], Lewis, James G., [from old catalog] joint author · [Philadelphia, Printed by National publishing co.] · leaf 278
51 to another. Whether or not there is a change in voltageof these oscillations depends upon the capacity, induc-tance, and resistance of each circuit. There are varioustypes of transformers in use. However, they have thesame general characteristics, that is, an induction in onecircuit always acts… … able. The smaller one can be slid into the larger one.It is commonly termed a loose coupler. B shows a flat,spiral type whose coils can be made to approach eachother. C shows an arrangement for mounting the flatspirals and moving them on a hinge at H. D shows twocoils, the small one mounted inside…
Radio
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
