Method and apparatus for communicating in building structures an

Details Method and apparatus for communicating in building structures an Method and apparatus for communicating in building structures an

1971-06-07

1976-08-31

Habecker, Thomas B.

Communications: electrical

Systems

Selsyn type

340416, 179 82, H04M 1104

Patent

active

039784690

ABSTRACT:
There is disclosed a method and apparatus for communicating in multi- and single story building structures and parts thereof wherein a signal voltage source is connected to a metallic building structural member which is an integral part of the building. Multi-story buildings at least as high as fifty stories have been excited by utilizing a structural member such as a vertically extending stand pipe and like structural members. In such multi-story structures and in smaller structures such as one story frame, masonry and metal building structures, one of the terminals from the voltage source may be connected to earth ground by stakes or rods driven in the ground. Resistance means are inserted in the lines to limit the short circuit current and to provide a degree of impedance match.

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patent: 3551890 (1970-12-01), Silverman
J. G. De Graaf, "Selective Paging System Uses Coded Transmission," Electronics, Feb. 26, 1970, pp. 68-70.

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