. Electrical world. diagram in case they form an extensive sys-tem. Figs. 4 and 6 show a symbol which I would suggest, the ideabeing that parentheses enclosing a network or any portion of a net-work represent a shield surrounding that much of the network. Incase the terminals project through the shield they are shown pro-jecting through the parentheses. In case the shield is short-circuitedto one of the terminals of the network that is shown by a dot con-necting the proper parenthesis with the terminal. It is to be under-stood that the parentheses are electrically connected. The paren-thesis m
. Electrical world. diagram in case they form an extensive sys-tem. Figs. 4 and 6 show a symbol which I would suggest, the ideabeing that parentheses enclosing a network or any portion of a net-work represent a shield surrounding that much of the network. Incase the terminals project through the shield they are shown pro-jecting through the parentheses. In case the shield is short-circuitedto one of the terminals of the network that is shown by a dot con-necting the proper parenthesis with the terminal. It is to be under-stood that the parentheses are electrically connected. The paren-thesis may degenerate into an arrow head for convenience. Whenseveral shields are employed, brackets, braces and quotation marksmay be introduced. By designating shields by letters, as S, S, S,their connection may be shown in the same conventionalway as a ground connection. See Figs. 7 and 13. Fig. 7 shows a shielded balance. Each of the six branches hasits individual shield, which is connected to one of its terminals, and. FIG. 7. FIG. 8. the entire balance is surrounded by a shield which is shown six terminals to which the six individual shields are connectedmay be disposed with respect to the four corners of the bridge inany one of the possible ways. To each of the four comers individualshields may be connected or one of the corners may have no indi-vidual shield connected to it, as shown in Fig. 7. corner C. Thefloating shield may be directly connected to any one of the fourcorners of the bridge. If the connection were made to a corner,such as D, where three of the individual shields terminate, as isshown in Fig. 7, then a material reduction in the complexity of thesystem would result, for three of the branches would be reduced toa single shield, and only the remaining three branches would have adouble shield. In fact, but one double shield would be absolutelynecessary, for, if the telephone circuit has a double shield, it doesnot make any material difference whether a
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
