Electric heating – Metal heating – By arc
Patent
1979-07-06
1981-07-07
Albritton, C. L.
Electric heating
Metal heating
By arc
219121L, 219121LL, 219121LM, B23K 2700
Patent
active
042776694
ABSTRACT:
Method and device for detecting the threshold of generation of a non-visible laser beam, wherein a dark colored film, enclosed in a transparent container, is placed in the path of the laser beam to cause the dark film to burn when the laser beam impinges thereon and wherein the transparent container prevents the vaporized film particles from the area impinged upon by the laser beam from escaping into the atmosphere.
REFERENCES:
patent: 3553421 (1971-01-01), Schawlow
patent: 3889272 (1975-06-01), Lou et al.
patent: 4087672 (1978-05-01), Yi
J. A. Parisi, IBM Technical Disclosure Bulletin, "Integrated Resistor Trimming", vol. 17, No. 10, p. 2878, Mar., 1975.
Alfano Robert R.
Schiller Norman H.
Albritton C. L.
Hamamatsu T.V. Co, Ltd
Kojima Moonray
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