. Electrical world. ratus is contained therein, entirely protected except whenactually in use. ELECTRICAL WORLD axd ENGINEER. Vol. XLIII. No. 2r. Mr. A. W. Hill has brought out a novel transmitter in which oneblock of carbon serves as the body of the casing and the stationaryelectrode. A sectional view of this transmitter is shown in Fig. 3,which indicates how the diaphragm, mounted between rubber pads,is clamped to the carbon block by the face plate. Within a centraland deeper recess in the carbon block the microphonic button is builtup. The recess is lined with an insulating tubular bushing,
. Electrical world. ratus is contained therein, entirely protected except whenactually in use. ELECTRICAL WORLD axd ENGINEER. Vol. XLIII. No. 2r. Mr. A. W. Hill has brought out a novel transmitter in which oneblock of carbon serves as the body of the casing and the stationaryelectrode. A sectional view of this transmitter is shown in Fig. 3,which indicates how the diaphragm, mounted between rubber pads,is clamped to the carbon block by the face plate. Within a centraland deeper recess in the carbon block the microphonic button is builtup. The recess is lined with an insulating tubular bushing, whichcontains the granular carbon. The bottom of the recess forms therear electrode, while the front electrode attached to a metal backingslides within the bushing, the joint being jacked by a felt ring. The two remaining patents to be included under this head describe concerning them the reader is referred to the patents as the subjectmatter does not seem of sufficiently general interest to warrantdiscussion FIG. 3.—HILL TR.\NSMITTER. respectively a receiver and a ringing generator. The novelty in thereceiver lies in the method of mounting the magnet within the casing is in three parts, a joint being made in the body near thebell. The magnetic system carries a collar secured to it near thecoils, and this collar forms the coupling for uniting the two partsof the body of the casing. The distance which the collar is screwedinto the bell piece of the casing determines the air space betweenthe diaphragm and poles. The tail piece is then screwed up like alock nut securing the whole in adjustment. W. C. Runge has beengranted the patent for this. MISCELLANEOUS. While the effects of electrostatic capacity have been brought wellunder control by the Pupin system of loading conductors, all othersteps towards ameliorating its detrimental qualities are J. S. Richmond, of New York, aims to do this in his transmis-sion system described in two recent patent
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
