. Journal of electricity, power, and gas . E in parallel with con-denser D. When the contact at I is open and assum-ing that the resonant circuit B C D is tuned to reso-nance under these circumstances, intense alternationswill appear in this resonant circuit BCD, withoutpassing through the telephone receiver R, because of its enormous reactance to high frequency now the interrupter I closes the circuit and throwsin this condenser E the accumulated energy in theresonant circuit BCD will discharge itself suddenlythrough the telephone receiver R. The reason for thisaction is appro
. Journal of electricity, power, and gas . E in parallel with con-denser D. When the contact at I is open and assum-ing that the resonant circuit B C D is tuned to reso-nance under these circumstances, intense alternationswill appear in this resonant circuit BCD, withoutpassing through the telephone receiver R, because of its enormous reactance to high frequency now the interrupter I closes the circuit and throwsin this condenser E the accumulated energy in theresonant circuit BCD will discharge itself suddenlythrough the telephone receiver R. The reason for thisaction is approximately as follows: While the coil A and I! are in resonance the con-denser C is charged and discharged at a rate corre-sponding to the frequency of the alternations. B there-fore offers no opposition to this charge and dischargebut assists it and maintains the intensity of the alter-nations. If, however, the condenser has a charge whenB is thrown out of resonance with A because of theclosing of I and the insertion of more capacity E the. Fig-. 2. discharge of the charge in C will be opposed by B andthe charge will have to find another path which it doesthrough R. This discharge takes place in a minutefraction of a second, thus producing a sharp tap in thereceiver. Rapid Telegraph Transmitter. Fig. 3 shows the rapid telegraph transmitterwhich is operated by means of a punched tape has a series of small holes down thecenter. The holes on each side of this centralline are punched by hand and those on one siderepresent the dots, while those on the other representthe dashes of the Continental code. The central line
Size: 1532px × 1632px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookidjo, booksubjectelectricity
