High frequency apparatus, design, construction and practical application; a practical treatise for electrical engineers, electricans, physicians, students and experimenters (1920)
Curtis, Thomas Stanley · New York, Norman W. Henley publishing company · leaf 135
thing but direct current isavailable in the vicinity. No rotary converter is necessaryand if the physician chances to be in a neighboring townwhere alternating current is unexpectedly found, the appa-ratus is equal to the emergency. For dentists this outfit is exceptionally well adapted.It is… … Fig. 64.—Powerful portable outfit comprising both kicking coil and transformerfor use on either direct or alternating current circuits the highest grade which combines the features of porta-bility, reliability, and general utility to a degree not ap-proached by the smaller outfits. The price of…
Electric apparatus and appliances
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