Abstract: A glue detecting system uses linear filament lamps and photodiodes mounted in the ends of nonreflective tubes to distinguish between diffuse and specular reflections from the surface of a moving article. Sensor photodetectors are positioned directly over the locations where glue beads are intended to be present; reference photodiodes observe the surface where no glue is intended. The spacing between certain photodiodes in the direction of movement of the article may be used to determine the velocity of the article, and the intensity of the reflections is used to determine the presence of glue in the desired areas, and the presence of unwanted glue in other areas; the duration of the specular reflections is used to determine the volume of glue present. An alarm circuit indicates an insufficient amount of glue in the desired areas or the presence of unwanted glue in undesired areas.

Abstract: A method and apparatus for controlling the temperature inside an incubator. The incubator includes a heater for heating the air circulating therein. A temperature controller measures the skin temperature of an infant therein and at least one other temperature within the incubator environment which has a significant effect on the infant's skin temperature. The controller responds to the measured temperatures and other calculated temperatures to either turn on or turn off the incubator air heater so as to keep the temperature difference between the infant's skin and the environment, which affects skin temperature, below a preset maximum. The controller also causes the rate of temperature changes within the incubator to be minimized.