. Electrical world. air brake sj-stem leads into the controller box to clear the latter of dust and to obtain a muffler ,150. ELECTRIC FIRE ALARM; Joseph A. Barten and Samuel R. Sneeringer. Philadelphia, Pa. App. filed April 30, 1903. ,170. METHOD OF ELECTRIC HEATING; Alfred H. Cowles, Cleveland, Ohio. App. filed Nov. 5, 1902. (See page 225.) ELECTRIC BLANKET; Charles Foglesong, St. Paul, Minn. Sept. 14, 1903. .\ blanket consisting of an asbestos layer ana awoolen layer with heating resistance interposed between them. METHOD OF CONTROLLING SPARK
. Electrical world. air brake sj-stem leads into the controller box to clear the latter of dust and to obtain a muffler ,150. ELECTRIC FIRE ALARM; Joseph A. Barten and Samuel R. Sneeringer. Philadelphia, Pa. App. filed April 30, 1903. ,170. METHOD OF ELECTRIC HEATING; Alfred H. Cowles, Cleveland, Ohio. App. filed Nov. 5, 1902. (See page 225.) ELECTRIC BLANKET; Charles Foglesong, St. Paul, Minn. Sept. 14, 1903. .\ blanket consisting of an asbestos layer ana awoolen layer with heating resistance interposed between them. METHOD OF CONTROLLING SPARK PRODUCTION; Lee DeForest, New York, N. Y. App. filed June 17, 1903. The method of cre-ating sparks between normally inoperative sparking terminals which con-sists in increasing at will the condition of ionization of the medium be- tween the sparking terminals. DEVICE FOR ICE FROM ANTENNAE; Lee De For-est, New York, N. and Walter G. Clark, Seattle, Wash. App. filedJune 17, 1903. Apparatus for s
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
