. Journal of radiology . gap at leisure, as |N view of the increasing use of highfrequency apparatus due to thegrowing recognition of the advantagesof electrotherapeutics considerable in-terest naturally follows the introductionof new appliances such as that designedand marketed by The Liebel-FlarsheimCompany of Cincinnati as its ModelP Dynelectron. An outstanding feature in the designof this apparatus is the total absence ofLeydin jars or salt water solutions, ex-ternal means for cooling the spark gap,breakable glass condenser plates, andno oil to spill or seep out of the trans-former. the in
. Journal of radiology . gap at leisure, as |N view of the increasing use of highfrequency apparatus due to thegrowing recognition of the advantagesof electrotherapeutics considerable in-terest naturally follows the introductionof new appliances such as that designedand marketed by The Liebel-FlarsheimCompany of Cincinnati as its ModelP Dynelectron. An outstanding feature in the designof this apparatus is the total absence ofLeydin jars or salt water solutions, ex-ternal means for cooling the spark gap,breakable glass condenser plates, andno oil to spill or seep out of the trans-former. the indicator will retain its position aslong as the cord is not released. Asquickly as the cord is released, the balland indicator both return to theiroriginal positions. The scale has large black figures ona white background and is easily readat a considerable distance. It is cali-brated in kilovolts (crest or peakvalues) in accordance with the presentpractice. The gap is arranged for use with thenew Acme 85 kv. Corona Proof. Roentgen Generator (120 kv. peakvalue) equivalent to seven and one-half inches, oi for use on a circuit of1 70 kv. (peak value) equivalentto twelve inches. It can be mountedeither on the transformer cabinet or inthe overhead system. This gap fills a very important placebecause it combines the conveniencenecessary for fast routine work withthe accuracy which is so essential inhandling a therapeutic and diagnosticagent of such importance as x-rays—something not heretofore attained. In order to overcome the difficultiesin operation of spark gap that havebeen more or less universal, particularlythose due to corrosion and oxidation ofthe points as well as the overheating ofthe points of the gap. The Liebel-Flarsheim Company has reduced theelectrical resistance of the spark gap asmuch as possible and provided an ex-traordinarily large radiating Liebel, President of that Com-pany, says this apparatus can beoperated continuously within safe tem-perature
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Keywords: ., bookauthoramerican, bookcentury1900, bookdecade1920, bookyear1922
