Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 489
tedas described in his caveat, acted successfully as a speaking telephone.Bell, having first reduced his invention to practice, was successful inestablishing his rights over those of Gray. From the record, however^Gray is clearly entitled to at least share with Bell the honor for theinvention of… … I Fig. 3.—Bells modified telephone receiver (section). This receiver consists, as shown, of an electro-magnet M, oppositethe poles of which is a tightly-stretched membrane which closes a Dec., 1884.] Glimpses of the Electrical Exhibition. 46S mouth-piece T. A piece of watch spring in the form of a…
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