Coating processes – Electrical product produced – Hollow article
Patent
1975-04-03
1976-10-05
Kendall, Ralph S.
Coating processes
Electrical product produced
Hollow article
313221, 313222, 427107, H01K 132
Patent
active
039845907
ABSTRACT:
Electric discharge lamps of extended life can be produced or cheaper materials used in their manufacture by providing on the internal surface of the envelope and on the exposed surfaces of internal components a protective coating of a metal phosphate or arsenate glass. External surfaces can also be protected against corrosion in air or in the atmosphere within an outer jacket, where this is employed. The coating may be applied in a liquid medium which, preferably after draining, is warmed to evaporate the medium and thereafter baked to form the vitreous coating.
REFERENCES:
patent: 2843504 (1958-07-01), Bakel et al.
patent: 3023337 (1962-02-01), Repsher
Cayless Maurice Arthur
Cole Susan Margaret
Mason David Robert
Wharmby David Osborn
Buffalow Edith R.
Kendall Ralph S.
O'Connell Robert F.
Thorn Lighting Limited
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