Abstract: This invention relates to a structural laminate having a plastic surface finish coat laminated to a structural base which has exceptional bond strength between the structural base and the plastic layer with which it interfaces. The structural base comprises a glass reinforced gypsum layer. The plastic laminate portion comprises a plastic surface finish coat, preferably a polyester gel coat or an acrylic resin, bonded to a reinforcing layer of curable polyester or epoxy resin reinforced with glass fibers. The reinforcing layer is adhered to a bonding layer which comprises glass fibers protruding from the reinforcing layer and coated with a limited amount of organic resin such as polyester or epoxy resin. The glass reinforced gypsum layer is applied to the protruding fibers of the bonding layer to form an interface having a bond strength of at least about 150 psi as determined by ASTM C297-68.

Abstract: A portable desk top tray for organizing and arranging desk implements such as a tape dispenser, stapler, calendar and the like, includes a top surface supported above a desk top by at least a front wall. The top surface has several depressions. Each depression is adapted to receive a respective desk implement and is of a size and shape to laterally confine the respective implement against substantial horizontal movement. Several elongated sockets open through the front wall and extend rearwardly therefrom at positions laterally spaced from the depressions. The top surface may also be provided with an upright wall structure shaped to conform to another respective one of the desk implements for receiving the same. One of the sockets may be positioned below and laterally between the upright wall structure.

Abstract: A conventional stereo tape recorder is used to record a series of reference pulses on each of the two channels or magnetic tape tracks followed in each instance by intermediate event pulses representative of behaviorial phenomena or units. The delay or time interval between reference pulses and event pulses is indicative of the particular behavior that has been observed. An astable or free running multivibrator for each channel provides the reference pulses, whereas a monostable or one-shot multivibrator, which is triggered by its companion astable multivibrator, provides the event pulses. A key-controlled resistance-capacitance circuit connected in the monostable circuitry functions to vary the delay or position of the event pulses with respect to the reference pulses. Individual keys, or combination of keys, are assigned codes representative of the various behaviors and subjects to be observed and recorded.