Machine and process for reading cards containing medical specimens

摘要: Medical specimens suspected of containing certain microorganisms are introduced into cards wells having culture media therein. A reduction in the light transmitting characteristics any well indicates presence a microorganism. Each is examined at periodic intervals by projecting through it. This monitored plurality detectors located beyond, but nevertheless, alignment with well, and each detector provides signal which proportional to intensity cast upon If registers an unduly large decrease transmission, whereas others associated same emitter do not, this probably bubble ignored. enables machine look around bubbles. Adjustments made for change transmission caused distortion flexible walls ends wells. card has identification segments composed different bars, bar read projects it illuminated emitter, unless blocked out marking. predetermined number must register above prescribed threshold value establish absence marking read, disregard stray marks foreign particles on card. The moved incrementally reading head as viewing read.