Recorders – Record receiver deforming
Patent
1985-03-29
1987-10-13
Perkey, William B.
Recorders
Record receiver deforming
346 33P, G03B 3700
Patent
active
046994858
ABSTRACT:
In a fire tube boiler, combustion takes place in elongated boiler tubes, which are subject to corrosion, wear, deposition build-up and color changes. A cylindrical camera body, round in cross-section, is inserted into a still-hot boiler tube. The camera body is cooled by cooling fluid and is pushed along the tube using extension rods. A motion picture film strip, preferably color instant film within a cassette, is advanced by remote control, by the operator, to expose a sequence of film frames on the cassette's film plane, as the camera body is progressed within the tube. The tube is dark so that a camera shutter is not used. Instead, tiny light sources, such as incandescent bulbs and/or a swingable mirror, are used to select the exposure time of the film. A fixed-focus and fixed-distance lens system focuses the images from the tube's inner wall on the film plane.
REFERENCES:
patent: 2894436 (1959-07-01), Eber et al.
patent: 3172344 (1965-03-01), Jackson
patent: 3244085 (1966-04-01), Pulfer
patent: 3621767 (1971-11-01), Hyzer et al.
patent: 3691819 (1972-09-01), Guest
patent: 3832724 (1974-08-01), Duval
patent: 4131914 (1978-12-01), Bricmont
Lippman Robert
Schachter Mel
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