Other

Sankosha Corporation

Chikashi Okabayashi

Minoru Yoneda

Makoto Ishizaki

Kiyotaka Ando

Takashi Shikano

The present invention relates to a grounding device in which a grounding member E having a grounding conductorand a conductive laminated portioncovering the grounding conductoris integrated with a foundation member B of a building so that the grounding member E and the foundation member B overlap partly or entirely. The grounding device is configured so that the grounding member having the grounding conductor and the conductive laminated portion covering the grounding conductor is integrated with the foundation member of the building are so that the grounding member and the foundation member overlap partly or entirely. This makes it possible to easily offer a small grounding resistance. Further, the foundation member of the building contacts the earth over a large area. This enables a small grounding resistance to be stably offered for a long period.

Grounding device and method of constructing the same

The present invention relates to a communication line surge protecting system in which a quarter wavelength open circuit for a wavelength used is disposed in each of a central conductor line and an external conductor line so as to allow a signal with a predetermined communication wavelength to pass therethrough, while blocking signals with frequency components of lighting surge and the like, and in which a ground line is further provided in the central conductor line and a quarter wavelength short circuit for the wavelength used is disposed in each of the ground line and the external conductor line so as to block the signal with the predetermined communication wavelength, while allowing the signals with the frequency components of lighting surge and the like to pass therethrough. The signal of the predetermined wavelength used passes through the communication line and is insulated from the ground. On the other hand, the signals for lighting surge and the like which have frequencies different from the predetermined one are hindered from passing through the communication line and are connected to the ground, to which the lighting surge is discharged. Therefore, connection equipment can be safely and reliably protected from lighting surge to obtain a good and reliable communication signal with few losses.

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Tokyo, Japan

Chikashi Okabayashi