. Electrical world. n the line of the channel around whichclamps are placed to hold the parts of the insulator together. 761,111. PRODUCTION OF TUBES FROM REFRACTORY MATERIAL;Elihu Thomson, Swampscott. Mass. App. filed Aug. 28, 1902. \ pair ofelectrodes are surrounded by the refractory material in a divided stateand by drawing a gradually lengthening arc the material is fused and formsa tube. 761,117. ELECTRICAL REGULATING MECHA>ISM; Allyn B. Walton,Lorain, Ohio. App. filed June 25, 1902. The mechanism embodies anelectromagnet having two sets of poles forming two magnetic fields, oneof such
. Electrical world. n the line of the channel around whichclamps are placed to hold the parts of the insulator together. 761,111. PRODUCTION OF TUBES FROM REFRACTORY MATERIAL;Elihu Thomson, Swampscott. Mass. App. filed Aug. 28, 1902. \ pair ofelectrodes are surrounded by the refractory material in a divided stateand by drawing a gradually lengthening arc the material is fused and formsa tube. 761,117. ELECTRICAL REGULATING MECHA>ISM; Allyn B. Walton,Lorain, Ohio. App. filed June 25, 1902. The mechanism embodies anelectromagnet having two sets of poles forming two magnetic fields, oneof such fields being of greater impedance than the other, in connectionwith a movable coil in series with the magnet coil. 761,133. ELECTRIC SWITCH; Henry P. Ball, New York, N. Y. App. filedSept. 30, 1902. Relates to the mounting of the oil tank at the back of theswitchboard and the construction of the operating mechanism connectedtherewith. 51,258. W.^VE RECEIVER; Richard W. Shoernak^Pasadena. Cal. .\pp. filed May 2, 1902. OM* 134. AUTOMATIC SHORT CIRCUIT ALARM FOR ELECTRICALGAS LIGHTING OR OTHER SYSTEMS; Ferdinand M. Barrell, Brook-lyn, N. V. App. filed June 15. 1903- Details. ,150. TELEPHONE ATTACHMENT; George A. Cowgill, Euphemia, OhApp. filed July 16, 1903. (See page 1125.) ,182. ELECTRIC ARC LAMP; Joseph A. Rignon, Berlin, Germany. App,filed Aug. 21, 1902. Details. .198. HEAT ACTUATED ALARM SYSTEM; Charles E. Buell, Camden,N. J. App. filed May 28. 1903. APPARATUS FOR PRODUCING AX ALTERNATING MAGNETIC FIELD FOR THERAPEUTIC PURPOSES; Ernst Buhtz, Berlin. Germany. App. filed Jan. 30, 1904. Two or more magnets arranged about acommon shaft, the lines of force passing between their poles producing onrotation of the apparatus a vortex of Imes of force which is said to improve the therapeutic properties of the magnetic field. METHOD OF M.\KING ELECTRICAL HEATING E. Carpenter. New York, N. Y. App. filed Nov. 20, 1902. Theinsulating material while
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