Abstract: The present invention is directed towards a method and apparatus for permitting human perception of more of the spectrophotometric values which define the color of an observed object. A first optical filter, worn over the left eye is provided having a spectral response containing three peaks; one for each of red, green, and blue, tuned to the maximum responsiveness of the human eye to red, green, and blue colors. A second optical filter, worn over the right eye, is similar to the left optical filter, but with the peaks tuned to complementary portions of the visual spectrum. In this manner, a dimension of color perception is added, because each eye sees different colors for the same object which when combined represent the actual color of the object.

Abstract: An optically encoded information bearing label containing a two dimensional array of data cells includes a finder pattern comprising a plurality of spots arranged in a predetermined geometric pattern substantially analogous to the predetermined geometric pattern of said two dimensional array of data cells. The finder pattern is detected by first scanning the image area to detect spots. The locations of detected spots are compared to the known geometry of the finder pattern in order to provide for rapid and reliable finding of the finder pattern and the information bearing label. Additionally, the detected finder pattern spots provide information for decoding the two dimensional data array in order to compensate for label magnification, tilt and other distortions.

Abstract: An improved infant crib includes a top frame, and a base panel. The crib side walls each comprise a pair of hinged side panels which are hinged to each other, to the base panel, and to the top frame so as to collapse inwardly drawing the base and top frame together. The crib includes two end panels which are hinged to the top frame so as to rotate inwardly from a vertical position to a horizontal position on the same plane as the top frame. When the end panels are in a vertical position, the side panels are locked in place forming a rigid structure. Extendable legs slide downward from channels within the end panels to support the crib above the floor. The resulting structure is strong when assembled, yet is easily and quickly collapsible to form a compact package suitable for stacking storage.

Abstract: A static load for a high voltage driver includes first and second depletion mode field effect transistors and a diode-connected enhancement mode field effect transistor. The static load is arranged with a switching transistor to form a high voltage driver circuit. When the output of the driver circuit is at a relatively low potential, current drawn from the high voltage power supply is substantially reduced by applying a source to gate potential through the diode-connected transistor to one of the depletion mode transistors below the threshold voltage of the depletion mode transistor.

Abstract: A cable TV security system utilizes three radio frequency signals as three data communication channels: one downstream channel and two upstream channels. A headend alarm processor transmits system commands on the downstream channel. A plurality of subscriber alarm units, connected to the cable TV system, transmit messages on the upstream channels to the headend alarm processor. The respective center frequency of both upstream channels is selectable by command on the downstream channel transmitted from the headend. In the event that one subscriber's alarm unit malfunctions whereby a continuous stream of upstream transmission jams one of the upstream channels, the headend alarm processor changes the respective transmitter frequency of the remaining subscriber alarm units to a clear channel frequency. Alternatively, the frequency or frequencies of the malfunctioning unit may be changed. In either case, system security coverage is rapidly restored.