In 1961, engineers at the General Electric plant in Owensboro introduced a family of vacuum tubes called the Compactron.

12AE10 Compactron tube ( a dual pentode ), made by GE

Compactron tube: 12AE10, dual pentode

Variations of the Compactron design were made by Sylvania and by some Japanese firms.

The desire to include even more functions in one envelope resulted in the General Electric Compactron which had 12 pins.

They competed with the solid state revolution, and along with GE's Compactron, probably held it at bay for a few years.

Due to their specific applications in television circuits, many different Compactron types were produced.

Integrated circuits ( of the analogue and digital type ) gradually took over all of the functions that the Compactron was designed for.

New old stock replacements for almost all Compactron types produced are easily found for sale on the internet.

Advances in equipment and fabrication techniques give the sign or display manufacturer an extremely wide choice of production techniques, ranging from injection molding for intricate, smaller-size, mass-production signs ( generally 5000 units is the minimum ) to vacuum and pressure forming for larger signs of limited runs.

This vacuum formed sign is comprised of 27-in. ( or smaller ) panels formed of 0.080-in. clear butyrate sheet stock, masked and sprayed on the rear side.

This force is used in the formal definition of the ampere, which states that it is " the constant current that will produce an attractive force of 2 × 10 < sup >– 7 </ sup > newton per metre of length between two straight, parallel conductors of infinite length and negligible circular cross section placed one metre apart in a vacuum ".

In the IERS numerical standards, the speed of light in a vacuum is defined as c < sub > 0 </ sub > = in a vacuum, in accordance with the SI units.

The vacuum state is defined as the state with no particle or antiparticle, i. e., and.

Then the energy of the vacuum is exactly E < sub > 0 </ sub >.

Since all energies are measured relative to the vacuum, H is positive definite.

For an adiabatic free expansion of an ideal gas, the gas is contained in an insulated container and then allowed to expand in a vacuum.

The Apollo spacecraft could be tested in two vacuum chambers capable of simulating atmospheric pressure at altitudes up to, which is nearly a vacuum.

In electronic vacuum devices such as a cathode ray tube, the anode is the positively charged electron collector.

Most abacá fiber is pulped and processed into specialty paper used in tea bags, vacuum bags, currency, and more.

To conduct an atom probe experiment, such a needle is placed in an ultra high vacuum chamber.

After introduction into the vacuum system, the sample is reduced to cryogenic temperatures ( typically 20-100 K ) and manipulated such that the needle's point is aimed towards an ion detector.

A liquid in a vacuum has a lower boiling point than when that liquid is at atmospheric pressure.

According to Birkhoff's theorem, it is the only vacuum solution that is spherically symmetric.

One hypothesis is that dark energy is the energy of virtual particles ( which mathematically must exist in a vacuum due to the uncertainty principle ).

In physical cosmology, cosmic inflation, cosmological inflation or just inflation is the theorized extremely rapid exponential expansion of the early universe by a factor of at least 10 < sup > 78 </ sup > in volume, driven by a negative-pressure vacuum energy density.

The cathode ray tube ( CRT ) is a vacuum tube containing an electron gun ( a source of electrons or electron emitter ) and a fluorescent screen used to view images.

The vacuum level inside the tube is ultra-high vacuum on the order of

The bore is unrifled but is provided with an insert tube which is rifled and which, surprisingly, gives pretty fair accuracy even though it's only 3-1/2 inches long.

One simple method of measuring the expansion of the heart is to tie a thin rubber tube, filled with mercury, around the heart and record the change in resistance as the tube is stretched.

Make sure that the metal tube through which the wire passes is in the shape of an inverted `` L '', the foot of the `` L '' about three inches long, so that the puppet can hang directly under the light.

The stamens are usually found around the style, either aggregated densely or fused into a tube, probably an adaptation in association with the plunger ( brush ; or secondary ) pollination that is common among the families of the order, wherein pollen is collected and stored on the length of the pistil.

* In a cathode ray tube, it is the positive terminal where electrons flow out of the device, i. e., where positive electric current flows in.

In a tube, the anode is a charged positive plate that collects the electrons emitted by the cathode through electric attraction.

In ET AAS a transient signal is generated, the area of which is directly proportional to the mass of analyte ( not its concentration ) introduced into the graphite tube.

The mercury, is then swept into a long-pass absorption tube by bubbling a stream of inert gas through the reaction mixture.

Above, A is the variable cross-section area of the tube at the inlet and exit.

Mixing artist or student quality acrylic paint with household acrylic emulsions is possible, allowing the use of pre-mixed tints straight from the tube or tin, so presenting the painter with a vast color range at his or her disposal.

The resulting liquid change in the U tube is an indication of the wind speed.

The highly successful metal pressure tube anemometer of William Henry Dines in 1892 utilized the same pressure difference between the open mouth of a straight tube facing the wind and a ring of small holes in a vertical tube which is closed at the upper end.

The pipe from the straight tube is connected to the top of the sealed chamber and the pipe from the small tubes is directed into the bottom inside the float.

In the tube anemometer the pressure is measured, although the scale is usually graduated as a velocity scale.