Abstract: An automated periodontal probe uses a logic device to control the drive motor of a distendable probe rod. The movement of the probe rod is measurable and the force applied to the rod is quantifiable, therefore the device affords exacting repeatability of test procedures on periodontal tissues and permits an accurate survey of the gum pockets which survey may be displayed or recorded. Further the device can be calibrated to cause minimum discomfort to the patient.

Abstract: A portable device and a process for detection of persons and things by the Condensation Nuclei" technique. The disclosure sets out a new continuous flow device and process that collects an air sample, subjects it to supersaturation conditions when flowing for growing or condensation on air sample nuclei, and detects and counts the condensated or grown particles with a photo means and a conventional counter. An air sample is pumped through a heated tube humidifier where the sample becomes supersaturated for condensation. It is then carried by detector means for counting.

Abstract: The tracker tracks on a center of contrast on a selected target while trang gates are adjusted automatically to fit the target contrast area's shape and size. The appropriate bright or dark contrast detector is adjusted to allow discrimination of the target contrast from its background, thus allowing a tracking window to encompass the selected contrast area. Orthogonal error signals are provided for servoing a vidicon camera to maintain the viewed field centered on the target.