Design and performance of magnets in the automatic telephone (1912)
Hays, Don Llewelyn, Thvedt, Christian Bernhard · leaf 48
(19) … —CHRONOGRAPH RECORD--The aooompaning chrono-graph reoord shows the ratio oftime of make and break to thetime of one seoond. The drumon whioh the record was taken re.volved in the direction indicatedby the arrow. Length ABW includes threewave3 (on red line) each of whichrepresents a make and a…
Electromagnets · Telephone, Automatic · Theses
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
