Abstract: A frequency scanning radio system and programming means for selecting the frequencies to be used, and to determne whether or not the channels are in use. The programming means controls not only the direction but also the speed of the frequency scanning in addition to the frequencies monitored. The system further displays the frequency which is being monitored, whether selected by the programming means or selected manually. A further feature is an automatic shifting of frequency when the radio is transmitting into a repeater station.

Abstract: A radiation energy calibrating system and method which uses a pair of calibrated detectors for measurements of radiation intensity from X-ray tubes for a non-invasive determination of the electrical characteristics; i.e., the tube potential and/or current.

Abstract: A movable joint construction of human or animal skeletons in which simulated skeletal members are formed of a deformable plastic material capable of deforming sufficiently to permit a connector member formed integrally with one of the skeletal members to be snappably received within and retained within a socket portion formed in the mating surface of the other skeletal member. In a preferred embodiment, at least one of the skeletal members is provided with a simulated cartilage portion on an outer surface adjacent to the area of snap-fit connection with other juxtaposed adjacent skeletal members to thereby simulate the appearance and function of cartilage positioned between the bone members. In another embodiment, separate cartilage members are provided with connector members on either side thereof to be capable of being snappably received within and retained by connection means so as to be positioned between the two skeletal members.