Abstract: A battery powered variable intensity hat mounted head lamp with a lamp shell mounting a lens and reflector assembly including an oscillator switching a power transistor mounted on the lamp shell for heat dissipation to control the lamp bulb, a printed circuit board in the lamp shell mounting the lamp bulb and the oscillator components, and a potentiometer mounted on the lamp shell for simultaneously varying both the on time and the off time in the duty cycle of the oscillator.

Abstract: Article orientation determining apparatus is exemplified in apparatus for determining if the tip ends of corn cobs are leading or trailing as they advance toward a kernel cutter head. The cobs pass between a column of sequentially pulsed radiation emitters and corresponding detectors which scan successive slices of the article and develop binary data indicative of the number of emitters that are unblocked during each scan. A computer uses the data to determine orientation and provides signals for controlling devices that act on misoriented articles. Means are provided for reversing the machine to clear a jam condition, for setting the number of reversals, for setting minimum acceptable cob length, for testing operation and for performing other functions. The scanner head is constructed to resist hostile environmental conditions.