. American telephone practice . FIG. AHEARN TRANSMITTER. fine dust tending to almost entirely fill the interstices between thelarger particles. Probably a more common cause for packing is that a few of thegranules may become wedged between the front and back elec-trodes, thus preventing the vibration of the front electrode. Some-times, in response to a very heavy sound wave, while the diaphragmis at the limit of its return stroke and the electrodes therefore at thefarthest possible distance apart, the mass of granules will settlemomentarily between the electrodes, and the diaphragm wil
. American telephone practice . FIG. AHEARN TRANSMITTER. fine dust tending to almost entirely fill the interstices between thelarger particles. Probably a more common cause for packing is that a few of thegranules may become wedged between the front and back elec-trodes, thus preventing the vibration of the front electrode. Some-times, in response to a very heavy sound wave, while the diaphragmis at the limit of its return stroke and the electrodes therefore at thefarthest possible distance apart, the mass of granules will settlemomentarily between the electrodes, and the diaphragm will beunable to spring back to its normal position. This may be demon-strated in almost any granular-carbon transmitter by placing thelips firmly against the mouthpiece, and drawing in the breath so asto draw the diaphragm forward. Upon releasing the pressure theinstrument will probably be found to be perfectly dead. This is a 72 AMERICAN TELEPHONE PRACTICE. trick often resorted to by salesmen to throw a bad light on a com-petito
Size: 1488px × 1678px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1900, bookdecade1900, bookidamericantelepho00mill
