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Mechanical applicances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical mvements, powers and devices"; (1917)

Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing company · leaf 36

An illustration from Mechanical applicances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical mvements, powers and devices";, 1917, leaf 36
nds twisted together and coated with varnish to bind them and pre-vent them rubbing upon one another. 34. ACOUSTIC TELEPHONE. Wire suspension to facilitate transmission of sound bymaking the angular turnsat about 450, with rub-ber straps wired to a yokeof wood as shown. Smalldampers of rubber or… … 3^ TRANSMISSION OF POWER. y. 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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