Portable radio device for protecting a radio circuit from static

Details Portable radio device for protecting a radio circuit from static Portable radio device for protecting a radio circuit from static

1985-08-19

1986-12-23

Tolin, G. P.

Electricity: electrical systems and devices

Miscellaneous

174138D, 174159, 411903, H05K 700

Patent

active

046316400

ABSTRACT:
In a portable radio device comprising a housing (20), a printed wiring board (11) encased in the housing, and a machine screw (50) for fastening the board to the housing through a tapped and a via hole (17) and (25), the machine screw has head and threaded portions (51) and (52) and an insulating cap (55) of a cylindrical shape covering the head portion and having at least one groove. Preferably, a pair of the grooves (56, 57) are formed parallel to an axis of the machine screw. The head portion may be circular or polygonal in cross section and have at least one screw slot. At least one groove may be formed on an upper end surface of the insulating cap. Alternatively, the machine screw may wholly be made of an insulating material.

REFERENCES:
patent: 2191171 (1940-02-01), Lee et al.
patent: 2432986 (1947-12-01), Forman
patent: 2706774 (1955-04-01), Bowman
patent: 3078334 (1963-02-01), Forman
patent: 3102571 (1963-09-01), Scott
patent: 3105167 (1963-09-01), Broderick
patent: 3592100 (1971-07-01), MacKiewicz

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