Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1988-06-01
1989-09-19
Peng, John K.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 93, 21912123, 21912183, H04N 718
Patent
active
048686492
ABSTRACT:
The televisual monitoring apparatus incorporates at least one camera (10) fastened to the support of the welding machine. The camera (10) incorporates, interposed on the path of the light rays coming from the welding zone and upstream of a device (22) for conversion of the light rays into video signals, a filter (24) composed of a plate of ceramic material having light rotatory properties and electrodes disposed in contact with each of the two faces of the plate in accordance with a determined network. The monitoring device also incorporates, associated with the camera 10, an electronic video signal analysis and electrode potential control arrangement.
REFERENCES:
patent: 4168512 (1979-09-01), Ito et al.
patent: 4450339 (1984-05-01), Corby, Jr.
patent: 4488032 (1984-12-01), Case, Jr. et al.
patent: 4649426 (1987-03-01), Bolstad
patent: 4652916 (1987-03-01), Suzakl et al.
"Development of a CCTV System for Welder Training and Monitoring of Space Shuttle Main Engine Welds"; Gordon et al.; "Welding Journal", vol. 66, No. 3; Mar. 1987; pp. 47-54.
Framatome
Peng John K.
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