A selector device is provided herein for the random selection of a small set of balls from a larger set of balls. It includes a flat box having a transparent cover. The box is divided into an upper chamber and a lower chamber, the upper chamber containing a large set of balls therein, with a small set of the balls having a significantly different appearance from the first set of balls, e.g., by being colored differently. The lower chamber is formed by parallel channels through apertures. The cha...

The timer generates a selected number of control pulses per hour, at unpredictable (pseudo-random) intervals, for use with a time lapse video tape recorder used for time studies. The hour is divided into equal intervals to provide the number of samples required per hour, and one trigger pulse is generated randomly timed within each interval. A noise generator drives a counter whose outputs are loaded every Nth clock pulse into an N-stage shift register. The contents of the shift register are shi...

An automatic selector unit for repetitively actuating an automatic phonograph to play randomly selected records includes a first timer for measuring the elapsed time since a previous play and a continuously running second timer for generating periodic pulses. The unit actuates the scanning mechanism of the phonograph after a predetermined elapsed time to bring different records successively into position for play and thereafter actuates the player mechanism on the next pulse from the second time...

A random copolymer comprising ethylene, a 1,4,5,8-dimethano-1,2,3,4,4a,5,8,8a-octahydronaphthalene and optionally an alpha-olefin having at least three carbon atoms or cycloolefin. The mole ratio of polymerized units from the 1,4,5,8-dimethano-1,2,3,4,4a,5,8,8a-octahydronaphthalene to polymerized units from ethylene is from 3:97 to 95:5 and the 1,4,5,8-dimethano-1,2,3,4,4a,5,8,8a-octahydronaphthalene is incorporated in the polymer chain as polymerized units without ring-opening. The copolymer is...

A random generator is described which includes a plurality of rotatably mounted indicia reels. A stopping disc is mounted to rotate with each reel and has a plurality of equally spaced magnetic slugs disposed about the circumference thereof. An electromagnet is placed in close proximity of each stopping disc and adapted to be randomly energized to engage one of said plurality of magnetic slugs. The stopping disc is adapted to rotate at a rate faster than the indicia reel. Adjustment is provided ...

Disclosed is a random packing element for use in exchange process apparatus, for example. The packing element features bowed strips and projections to provide an abundant supply of liquid flow surfaces, drip points and gas flow-through passages to enhance the interfacing of fluids in the exchange process packing bed, with various shapes for the packing element achieved by selecting the pattern of bowing of the strips and the attachment areas. The packing element also displays strips shortened to...

A random number generator circuit includes a primary circuit configured to generate a value within a first range and a secondary circuit configured to generate a value within a second range. A detector circuit detects whether or not the value from the primary circuit is within the desired output range for the random number generator circuit, and selects either the value from the primary circuit or the value from the secondary circuit in response. The second range is the desired output range and ...

Disclosed is a random packing element for use in exchange process apparatus, for example. The packing element features boughed strips and projections to provide an abundant supply of liquid flow surfaces, drip points and gas flow-through passages to enhance the interfacing of fluids in the exchange process packing bed.

A random number generator circuit includes a primary circuit configured to generate a value within a first range and a secondary circuit configured to generate a value within a second range. A detector circuit detects whether or not the value from the primary circuit is within the desired output range for the random number generator circuit, and selects either the value from the primary circuit or the value from the secondary circuit in response. The second range is the desired output range and ...

A memory in which each cell comprises an MOS transistor merged with a storage capacitor and in which the cells are arranged to permit adjacent pairs of transistors in a common column to share a common source and the transistors in a common row to share a common gate electrode conductor. The memory uses a first polycrystalline silicon layer which is patterned to provide interconnected storage electrodes and a second polycrystalline silicon layer which is patterned to provide a plurality of stripe...