The Thorn brand started life as the Electric Lamp Service Company Limited, established by Sir Jules Thorn on 29 March 1928, importing incandescent filament lamps and radio valves from the continent.
32.
By January 1886 the company's system had increased to include 1, 000 filament lamps on of circuit, and in 1887, it was decided for the company to provide a day time service.
33.
In January 1893 Franklin Pope wrote an article published on the head page of the " Electrical Engineer " titled " The Carbon Filament Lamp of 1859 The Story of an Overlooked Invention ."
34.
There is currently interest in banning some types of filament lamp in some countries, such as Australia planning to ban standard incandescent light bulbs by 2010, because they are inefficient at converting electricity to light.
35.
With conventional filament-lamp multi-lens signals the red aspect only remains alight for a fraction of a second when the junction-indicator is proved, as filament lamps can be proved correctly alight much more quickly than LED units.
36.
In 1899, the Berliner Elektrizit�ts-Werke ( BEW ), a Berlin electrical utility, decided to greatly increase its distribution capacity by switching to 220 volt nominal distribution, taking advantage of the higher voltage capability of metal filament lamps.
37.
The previous practice of a small filament lamp on the tip of the endoscope had left the choice of either viewing in a dim red light or increasing the light output-which carried the risk of burning the inside of the patient.
38.
In October 1908 the chairman reported to shareholders that the new metallic filament lamps had much reduced the demand for electricity and, while it would doubtless be followed by a great extension of demand, for the present there was a check on the sale of steam turbines.
39.
Imagine a good old fashioned tungsten filament lamp-or a florescent tube maybe . . . each little part of the filament or of the glowing surface is giving off a little bit of light . . . right down to the individual atoms-each one is emitting light.
40.
An EL film is a so-called Lambertian radiator : unlike with neon lamps, filament lamps, or LEDs, the brightness of the surface appears the same from all angles of view; electroluminescent light is not directional and therefore hard to compare with ( thermal ) light sources measured in lumens or lux.
