Fusing materials for glass by application of heat.


Related Terms

PEEPDOOR

A small door in a furnace with a glass opening through which combustion may be observed.

OSTWALD VISCOMETER

A viscometer in which liquid is drawn into the higher of two glass bulbs joined by a length of capillary tubing, and the time for its meniscus to fall between calibration marks above and below the upper bulb is compared with that for a liquid of known viscosity.

OPTICAL LANTERN

A device for projecting positive transparent pictures from glass or film onto a reflecting screen; it consists of a concentrated source of light, a condenser system, a holder (or changer) for the slide, a projection lens, and (usually) a blower for cooling the slide. Also known as slide projector.

NICHOLS RADIOMETER

An instrument, used to measure the pressure exerted by a beam of light, in which there are two small, silvered glass mirrors at the ends of a light rod that is suspended at the center from a fine quartz fiber within an evacuated enclosure.

MERCURY BAROMETER

An instrument which determines atmospheric pressure by measuring the height of a column of mercury which the atmosphere will support; the mercury is in a glass tube closed at one end and placed, open end down, in a well of mercury. Also known as Torricellian barometer.

MELTING FURNACE

A furnace in which the frit for glass is melted.

MALLORY BONDING

Hermetically sealing polished silicon chips to polished glass plates by placing the two pieces together, heating them to about 350 C (662 F), and applying approximately 8000 volts across the assembly.

LOOK BOX

Box with glass windows built into distillation-column rundown lines (or other flow lines) so that the stream of condensate from the condenser can be watched.

LIQUID-IN-GLASS THERMOMETER

A thermometer in which the thermally sensitive element is a liquid contained in a graduated glass envelope; the indication of such a thermometer depends upon the difference between the coefficients of thermal expansion of the liquid and the glass; mercury and alcohol are liquids commonly used in meteorological thermometers.

LEHR

A long oven in which glass is cooled and annealed after being formed. Also spelled lear; leer.

Related questions

MarineProHelp 2018 - 2020