Telegraphy – Systems – Simplex-reversing periodic
Patent
1975-05-08
1976-06-29
Britton, Howard W.
Telegraphy
Systems
Simplex-reversing periodic
178DIG36, 235 92MT, H04N 718
Patent
active
039670546
ABSTRACT:
A television system for dimensional measurement of an object to produce an output analog voltage representative of the dimensional measurement and providing a direct visual readout of the dimensional measurement, which system includes a televising video signal having horizontal synchronizational signals and video information signals in horizontal scan lines which televising means has integral therewith means for generating a horizontal sweep voltage to control a horizontal line scan between successive horizontal synchronized signals, gating means responsive to a predetermined number of gating pulses established by a horizontal and vertical field of view positioning means, an amplifier for amplifying the composite video signal, generating means responsive to the black/white voltage level of the gated video information signal of each of a predetermined number of horizontal line scan increments for generating first and second control signals when the black/white level is at preselected levels, storing means such as a sample and hold circuit which is responsive to the control signals to sample and hold electrical signals representative of the average voltage levels of the horizontal sweep voltage at each horizontal line scan increment when the first and second control signals are generated, a differential amplifier for generating an analog output voltage derived from the difference in stored voltage levels and display means responsive to the analog output voltage for producing a visual read out of the dimensional measurement of the object.
REFERENCES:
patent: 3180205 (1965-04-01), Heppe
patent: 3321575 (1967-05-01), Lewczyk
patent: 3814845 (1974-06-01), Hurlbrink
Britton Howard W.
Circon Corporation
Meaney, Jr. Daniel J.
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