Signals and indicators – Indicators – Rotary indicator with actuating means
Patent
1984-11-30
1986-08-12
Frankfort, Charles
Signals and indicators
Indicators
Rotary indicator with actuating means
358107, 356404, 356421, G01J 352
Patent
active
046049630
ABSTRACT:
A hand held and hand operated apparatus for analysis of the relationship between numerical values and displayed greyscale of pixels making up an image matrix. The apparatus has a pair of relatively movable members that are located relative to each other to display a greyscale in comparison relationship to window and level scales used to provide rapid analysis of a greyscale distribution of a given image. The members comprise a first cylindrical member concentrically accommodating a cylindrical sleeve. The first member has viewing ports ruled with scales representing values of selected window and level. The sleeve has the greyscale which can be selectively longitudinally and rotatably positioned relative to a viewing port to provide analysis information concerning the greyscale distribution of an image, such as the image on an X-ray film or displayed on a CRT.
REFERENCES:
patent: 2240053 (1941-04-01), Richardson
patent: 2322044 (1943-06-01), McFarlane et al.
patent: 2664879 (1954-01-01), Hardy
patent: 2941312 (1960-06-01), Mattucci
patent: 4112594 (1978-09-01), Impastato
Frankfort Charles
Scanlon Patrick R.
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