The Bell Telephone: The Deposition of Alexander Graham Bell, in the Suit Brought by the United States to Annul the Bell Patents |
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action answer answer to Question apparatus appears application armature arranged attached battery believe Bell body Boston carried cause circuit claim coil connected constructed contained copy core corresponding course Cross Cross-Int described diaphragm direction drawings effect electrical electrical undulations electro-magnet employed evidence Examiner exhibited experiments fact February filed fork give given Gray Hubbard illustrated induced intended Interferences invention iron January July June last answer lecture letter matter means membrane ments method mode musical obtained occasion operation original passed patent of March Patent Office permanent magnet pitch placed plate pole position present produced Professor receiver receiving instrument recollection reed referred Reis relating remember resistance result shown in Fig similar sound speaking telephone specification statement steel substantially telegraph tion tone transmitting understand United vibration voice Washington wire