APPARATUS FOR MEASURING AND MARKING APERTURE MASKS

An apparatus for measuring and marking aperture masks for color television cathode ray tubes according to hole size utilizing a light source positioned on one side of the mask and a light detection means positioned on the other side. Upon receiving the portion of light which passes through the mask,...

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Bibliographische Detailangaben
1. Verfasser:	SMITH C,US
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ELECTRICITY MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS PHYSICS TESTING
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Beschreibung
Zusammenfassung:	An apparatus for measuring and marking aperture masks for color television cathode ray tubes according to hole size utilizing a light source positioned on one side of the mask and a light detection means positioned on the other side. Upon receiving the portion of light which passes through the mask, the light detection means converts the light to a first electrical signal and sends this signal to a comparing means, which simultaneously receives a second signal representative of the proper hole size designated for the mask from a selection means. Should the two signals compare favorably, a control signal is derived which actuates a marking means for consequently marking the measured mask. Should the two signals not compare, the measured mask is not marked and is therefore rejected.