"Roentgen" induction coils and other X-ray apparatus (1903)
James G. Biddle Company · Philadelphia : James G. Biddle · leaf 11
visable to minimize the arcing which occurs at the switchcontacts anci that they are much more desirable than knife switches.p. . . The finish is superior throughout. Either pol- ished mahogany or selected (juartered oak is fur-nished for the wood-work as desired. Polished hard rubber of… … Figure 2. Type A Coil for 20 or 110 volts Direct Current. This is the type of coil in most extensive use for X-Ray workand is operated on direct current, —either 20 \olts from battery ormotor-generator, or the commercial no volts. It has the Roentgen Self-Starting MecKanical In-terrupter,…
X-rays · Induction coils · Radiography
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