carbon arc lamp

This consisted of two carbon arc lamps mounted on a rotating table.

Carbon arc lamps use a mixture of rare earth elements to improve the light quality.

Carbon arc lamps have been used since the early 1900s but have a very short life.

These larger ones used a carbon arc lamp as their light source with a diameter of 20 inches (50 cm).

In the 1920s, carbon arc lamps were sold as family health products, a substitute for natural sunlight.

The searchlights were based around extremely high-powered Carbon Arc lamps.

In those sites, carbon arc lamps were used to simulate the flash of tram cables.

In popular use, the term arc lamp means carbon arc lamp only.

In a carbon arc lamp, the electrodes are carbon rods in free air.

Carbon arc lamps operate at high powers, and had high efficiency compared to other pre-1920s light sources.

This was a carbon arc lamp employing alternating current, which ensured that both electrodes were consumed at equal rates.

By 1905, non-explosive electric lamps were being used, such as when a French photographer employed carbon arc lamps.

By 1875 the lighthouse was using carbon arc lamps powered by a steam driven magneto.

The sheets were exposed to the artwork via a carbon arc lamp, washed with water and process chemicals, and then dried.

A Klieg light is an intense carbon arc lamp especially used in filmmaking.

The company's product range included dynamos, lifts, carbon arc lamps, electric traction motors for trams and drilling equipment.

In the early 1900s up until the late 1960s, carbon arc lamps were the source of light in almost all theaters in the world.

Carbon arc lamps consist of two carbon rod electrodes in open air, supplied by a current-limiting ballast.

Carbon arc lamp spots were common until the 1990s, using the arc between carbon rods as their light source.

Carbon arc lamps were started by making contact between two carbon electrodes, which were then separated to within a narrow gap.

After they were first introduced during the 1940s, these lamps began replacing the shorter-lived carbon arc lamps in movie projectors.

Thorium fluoride was used in manufacturing carbon arc lamps, which provided high-intensity illumination for movie projectors and search lights.

Batman craned his neck around, already knowing what he'd see: the beam of carbon arc lamp striking the clouds, framing the sign of the bat.

Even in these applications conventional carbon arc lamps are being pushed into obsolescence by xenon arc lamps.

Emil Behnke used a carbon arc lamp, lenses and reflectors to photograph human vocal cords at exposures of second.