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Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries (1914)

Hiscox, Gardner Dexter, 1822?-1908 · New York, N. W. Henley Publishing · leaf 34

An illustration from Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries, 1914, leaf 34
nds twisted together and coated with varnish to bind them and pre-vent them rubbing upon one another. 34. ACOUSTIC TELEPHONE. Wire suspension to facilitatetransmission of sound bymaking the angular turnsat about 45°, with rub-ber straps wired to a yokeof wood as shown. Smalldampers of rubber or… … 32 TRANSMISSION OF POWER. 35. ACOUSTIC TELEPHONE. The front board, A, of the boxis provided with a central aperture. The diaphragm, b^ is stretched over the central opening of a board, D, which hasstrengthening ribs on its under side and alongthe edges. An annular block of wood, F,whose thickness…

Mechanical movements

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