Signalling through space without wires : being a description of the work of Hertz & his successors . s land. Fromthis book we take the following illustrations of the cohererand its connections :— Fig. 43 shows the coherer tied on to a glass tube, by which itis supported. Fig. 43 (Fig. 7 of Slabys book). Fig. 44 shows the simplest form of its connection to a one-cell battery A and a polarised relay B, which switches onanother battery of several cells a operating the Morse instru-ment or electric bell or sounder b and also the tapper-back c,the hammer of which raps gently on the coherer tube at
Signalling through space without wires : being a description of the work of Hertz & his successors . s land. Fromthis book we take the following illustrations of the cohererand its connections :— Fig. 43 shows the coherer tied on to a glass tube, by which itis supported. Fig. 43 (Fig. 7 of Slabys book). Fig. 44 shows the simplest form of its connection to a one-cell battery A and a polarised relay B, which switches onanother battery of several cells a operating the Morse instru-ment or electric bell or sounder b and also the tapper-back c,the hammer of which raps gently on the coherer tube at everysignal. -llilH- Ai -Q^O $* Fia. 44 (Fig. 8 of Slabys book).—Slabys arrangement of Coherer and oftapper-back and relay connections. The actual apparatus is depicted in two views, Figs. 45 and46, where will be recognised on the left-hand side the cohererand tapper-back; in the middle the batteries, both for relayand for coherer circuits ; and on the right-hand side a relayand the signalling or calling instrument, in this case shownas an ordinary electric bell. 64 SIGNALLING WITHOUT TELEGRAPHIC APPLICATIONS. 65
Size: 1183px × 2112px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidsi, booksubjectelectricity
