The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 604
cuits on the Con-tinent of Europe, transmission results equal to twice thoseof any other transmitter have been obtained, and this claimappears to be to a large extent substantiated. A patent granted in 1908 (No. 6587) to the same persons was APPENDIX 575 connected with an arrangement of the granule… … Fig. 518.—L. M. Ericssons C.B. System arranged for Measured Rate System current could be passed through the cell and the heat generatedbe rapidly dissipated. A later patent specification (No. 12,918 of 1909) describesmethods of stretching the diaphragms so as to ensure that thegreatest amplitude of…
Telephone
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