Signalling through space without wires : being a description of the work of Hertz & his successors . aa c3XI 0e3 o> oo o3 a o Xbo D oX 3 -t-> o3 a,g 03 -OCO d 08 Hi O Ph o Ph 5q Ph S3 O 03,0 O o Qj 03 n-, 02 Ph to ca- tsEn 66 SIGNALLING WITHOUT WIRES. A Morseinstrument is to be connected to the terminals M,and either it or the bell can be switched into the circuit atpleasure. The form of relay depicted is special to Slaby, butthe rest of the arrangements are practically identical withthose shown by Marconi at Dover. Fig. 47 gives a diagram of the actual connections. Fig. 48 is a picture
Signalling through space without wires : being a description of the work of Hertz & his successors . aa c3XI 0e3 o> oo o3 a o Xbo D oX 3 -t-> o3 a,g 03 -OCO d 08 Hi O Ph o Ph 5q Ph S3 O 03,0 O o Qj 03 n-, 02 Ph to ca- tsEn 66 SIGNALLING WITHOUT WIRES. A Morseinstrument is to be connected to the terminals M,and either it or the bell can be switched into the circuit atpleasure. The form of relay depicted is special to Slaby, butthe rest of the arrangements are practically identical withthose shown by Marconi at Dover. Fig. 47 gives a diagram of the actual connections. Fig. 48 is a picture of one of Slabys signalling stations,showing the way the elevated wire enters the Fig. 47 (Fig. 19 of Spark Telegraphy ).—Diagram of Slabys connectionsin the above apparatus. F is the coherer and K the tapper-back. During September, 1899, the Marconi method of signallingto long distances was demonstrated before the British Associa-tion at Dover. The chief feature of the installation was theelevated wire supported by a mast, and terminating at the topin a small conductor, which is usually made of wire netting,and is suspended from an insulating rod. The lower end olthis elevated wire passed into the building through anaperture, and was connected to one terminal of the usualRuhmkorff coil, the other terminal of which was signalling key was of the simplest description, being TELEGRAPHIC APPLICATIONS. 67 nothing more than a well-insulated Morse key worked byhand and causing a make-and-break in the primary circuit ofthe coil. The ordinary trembling break of the induction coilwas at work in the usual way, so that while the signalling keywas depressed contin
Size: 1142px × 2188px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidsi, booksubjectelectricity
