. Electrical world. s, Cal. App. filed Aug. 25, 1902. Electricalimpulses whose periods of vibrations are synchronous with musical vibra-tions, are created by causing musical sounds to vary the resistance of anelectric circuit; an induced current created therefrom is administeredtherapeutically. 594. MAGNET; Henry F. Campbell. Boston, Mass. App. filed May 16,1901. A magnet comprising parallel horseshoe-shaped bars arranged tohave an air space between them and a pole piece adjustably mounted uponthe lower ends of the bars. 646. COMBINED ELECTRICAL BATTERY RECEPTACLE AND BELLSUPPORT; William A. H
. Electrical world. s, Cal. App. filed Aug. 25, 1902. Electricalimpulses whose periods of vibrations are synchronous with musical vibra-tions, are created by causing musical sounds to vary the resistance of anelectric circuit; an induced current created therefrom is administeredtherapeutically. 594. MAGNET; Henry F. Campbell. Boston, Mass. App. filed May 16,1901. A magnet comprising parallel horseshoe-shaped bars arranged tohave an air space between them and a pole piece adjustably mounted uponthe lower ends of the bars. 646. COMBINED ELECTRICAL BATTERY RECEPTACLE AND BELLSUPPORT; William A. Harvey, Scranton, Pa. App. filed Sept. 9, 689. PLUG FOR TELEPHONE-SWITCHBOARDS; Frank D. Pearne,Chicago, 111. App. filed April 20, 1903. (See page 272.)704. TELEPHONE SWITCHING AND SIGNALING APPARATUS;Malcolm C. Rorty, Dedham. Mass. App. filed Jan. 3, 1902. (See page 272.),720. INCANDESCENT LAMP; Walter A. Springall, San Antonio, filed June 25, 1903. A multi-filament lamp having contacts in its. Transformer. into neck by cuit by twisting the INSULATOR; Louis Steinberger. New York, N. Y. App. filed May25, 1903. A knob of insulating material covered by a metal casing andhaving an opening through which the conductor is to be threaded. BINDING POST; Louis Steinberger, New York, N. Y. App. filedJune 22, 1903. The post has two threaded portions succeeding eachother and of different diameters, each one carrying its own wire clamp,ing devices. TROLLEY POLE; John J. Tartt, Los Angeles, Cal 750,733. App. filed Jackson, Ossipee,Jackson, Boston, March 30, 1903. An arm carrying the wheel is pivoted to the upper endof the pole and actuated by its own spring, the construction being suchthat vibrations of the pole will not be communicated to the arm. 750,753. ELECTRIC FURNACE; Ramon Chavarria Contardo, Sevres, filed Aug. 24. 1900. (See page 274.) 750,765. ELECTRIC MOTOR; Thaddeus W. Heermans, Chicago, 111. .\ Dec. 4, 1899. Both the fi
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