Metal working – Method of mechanical manufacture – Electrical device making
Patent
1984-06-13
1986-03-25
Goldberg, Howard N.
Metal working
Method of mechanical manufacture
Electrical device making
411176, 411180, 411187, 411424, 174 16HS, 361386, H05K 339, F16B 3900, F16B 3704, F16B 39282
Patent
active
045774021
ABSTRACT:
A stud with a threaded shank at one end and a flat head at the other end. Between the threaded shank and the flat head is a collar of smaller diameter than the head, but of larger diameter than the threaded shank. The collar has a knurled portion adjacent the head to secure the stud to a printed circuit board. At the juncture of the collar with the threaded shank, the collar forms a shoulder or seat upon which the heat sink and the semi-conductor case rest in spaced relation with the printed circuit board. A nut is then threaded onto the shank to secure the stud, the heat sink, the semi-conductor case and the printed circuit board to each other.
REFERENCES:
patent: 121060 (1871-11-01), Mutimer
patent: 1396455 (1921-11-01), Moore
patent: 2001290 (1935-05-01), Thomson
patent: 2024070 (1935-12-01), Sharp
patent: 3200296 (1965-08-01), Bruestle
patent: 3346286 (1967-10-01), Wescott
patent: 3699637 (1972-10-01), Rosiek
patent: 3908188 (1975-09-01), Kawamoto
patent: 4321423 (1982-03-01), Johnson et al.
patent: 4357746 (1982-11-01), Kytta
patent: 4403102 (1983-09-01), Jordan et al.
PEM.RTM. Fasteners for Use in or with PC Boards, Bulletin K480 by Penn Eng'r. and Mfg. Co., Copyright 1962, 1970, 1971, 1974, 1976 and 1980.
Arbes Carl J.
Goldberg Howard N.
Gore Gregory J.
Penn Engineering & Manufacturing Corp.
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