Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition – Control element responds proportionally to a variable signal...
Patent
1980-09-05
1982-06-01
Bernstein, Hiram
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
Control element responds proportionally to a variable signal...
422245, B01D 9102
Patent
active
043327737
ABSTRACT:
A crystal growing apparatus primarily for use by hobbyists and for classroom instruction comprises a container for holding a solute and aqueous solvent, a heat source in the form of a light bulb placed at the base of said container and spaced from the center thereof, a motor placed at the top of the container and having an associated rotating shaft, a filament for holding the crystal in the aqueous solvent-solute mixture, a fastening means for holding said filament coaxial with the motor shaft and enabling the filament to be vertically adjusted with respect to the aqueous mixture and a thermostat connected with the motor and light bulb to accurately control evaporation of the solvent and movement of the solute back and forth from the dissolved-to-crystal-line state by means of the thermal current set up by the off-centered heat source and intermittent operation of the heat source and motor. The crystal growing device is relatively simple in construction yet enables the formation of large single crystals of a wide variety of substances and is so constructed so as to be most useful by crystal growing hobbyists and students studying this chemical phenomenon.
REFERENCES:
patent: 2047252 (1936-07-01), Bloomenthal
patent: 2266254 (1941-12-01), Osterheld
patent: 2428525 (1947-10-01), Osterheld
patent: 2537093 (1951-01-01), Friedman et al.
patent: 2589310 (1952-03-01), Tournier
patent: 2863740 (1958-12-01), Christensen
patent: 3306829 (1967-02-01), Patterson et al.
Crystal Growth 2nd Ed., Pamplin Pergamon Press, N.Y., 1980.
Bernstein Hiram
Jacobson Harvey B.
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