Patent
1989-12-05
1991-07-09
Lee, John D.
350 9621, G02B 636
Patent
active
050299662
ABSTRACT:
The invention relates to a plug pin which receives an LWG coaxially and which consists of a hard basic material having a low coefficient of thermal expansion. An accurate working of the convex surface of the plug pin is possible without any problems in that its outer convex surface is provided on at least a part of its length with a coating, having a thickness of less than 300 .mu.m, in particular less than 150 .mu.m, of a material which can be subjected to a chipping treatment better than the basic material.
REFERENCES:
patent: 4166668 (1979-09-01), MacLeod
patent: 4289374 (1981-09-01), Franken et al.
patent: 4390237 (1983-06-01), Marazzi
patent: 4695124 (1987-09-01), Himono et al.
patent: 4722584 (1988-02-01), Kakii et al.
patent: 4746188 (1988-05-01), Loffler
patent: 4869571 (1989-09-01), Hubner et al.
Jostes Karl-Theo
Serapins Klaus
Bartlett Ernestine C.
Heartney Phan T.
Lee John D.
U.S. Philips Corp.
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