Popular science monthly . ^h^-4im i D 15 ®. Diagram of the Wiring in the Constructionof a Tuner Cabinet Set Lepel Improves His System AN important1916 patent isnumber 1,168,837issued to vonLepel for a methodof producing elec-trical drawing is areproduction of oneof the eight circuitdiagrams shown,and is typical ofthe invention. Adirect current gen-erator 2 suppliespower to the con-denser I throughimpedances 7 7 andresistances 6 6. Thedischarge of thecondenser i takesplace through theprimary of oscilla-tion transformer 5and across theparallel-platequenched spark-gaps shown
Popular science monthly . ^h^-4im i D 15 ®. Diagram of the Wiring in the Constructionof a Tuner Cabinet Set Lepel Improves His System AN important1916 patent isnumber 1,168,837issued to vonLepel for a methodof producing elec-trical drawing is areproduction of oneof the eight circuitdiagrams shown,and is typical ofthe invention. Adirect current gen-erator 2 suppliespower to the con-denser I throughimpedances 7 7 andresistances 6 6. Thedischarge of thecondenser i takesplace through theprimary of oscilla-tion transformer 5and across theparallel-platequenched spark-gaps shown at antenna andground are connected to the terminals ofthe secondary of transformer 5. If the constants of the circuit areproperly chosen, according to the theorywhich is explained in detail in thepatent, the combination of the quench-ing spark-gaps with the inertia coilswill result in an arcless discharge in theoscillation circuit, and the productionof practically perfect sustained oscilla-tions in the antenna circuit. When it isdes
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
