Recorders – Performance of multiple functions of steam and gas engines – Pressure responsive element
Patent
1975-09-23
1977-07-26
Hartary, Joseph W.
Recorders
Performance of multiple functions of steam and gas engines
Pressure responsive element
219121L, 346 76L, 346137, 358128, 358297, G01D 1532
Patent
active
040386635
ABSTRACT:
A method and apparatus for writing video information with a laser on a recording surface employing a protective foil on the writing surface through which foil the laser write beam is focussed. A stream of filtered gas is passed between the foil and the writing surface to remove any gaseous or particulate by-products of the writing process, and to protect the writing surface from room contaminance.
REFERENCES:
patent: 3369101 (1968-02-01), DiCurcio
patent: 3626141 (1971-12-01), Daly
patent: 3636251 (1972-01-01), Daly et al.
patent: 3665483 (1972-05-01), Becker
patent: 3866398 (1975-02-01), Vernon
patent: 4001840 (1977-01-01), Becker
Day Paul Edwin
Kenney George Churchill
Cohen Simon L.
Hartary Joseph W.
North American Philips Corporation
Trifari Frank R.
U.S. Philips Corporation
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