Patent
1987-06-08
1988-12-20
Lee, John D.
350 9616, G02B 636
Patent
active
047922044
ABSTRACT:
A process and a device for substantially eliminating tolerance-dependent variations of a preselectable space between the components of an optical communication apparatus is described. U-shaped recesses are provided in a metal casing for pressing in flange-type necks of, for example, optical transmitting and receiving devices. The parallel arranged devices are so spaced from each other that they are not subject to tolerance-dependent variations. For this purpose the metallic necks are coated with a plastic layer, and ribs provided at the lateral walls of the U-shaped recesses dig into the plastic layer. The necks are pressed in precisely at a predetermined spacing by means of a gauge. By the application of varying degrees of pressure when the ribs are pressed in on one side and the other side of the neck, one of the U-shaped recesses can be off-center.
REFERENCES:
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patent: 4639074 (1987-01-01), Murphy
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patent: 4657341 (1987-04-01), Sammueller
Johnson Alfred H.
Pohl Peter
Praeur Heinz
Schulz Dietmar
IBM Corp.
Lee John D.
Morris Jeffrey P.
Siemens Aktiengesellschaft
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