The most studied arcs are precisely formed between the carbon electrodes (cathode and anode). Air c

Call her "arc" the light phenomenon that occurs when a strong current bridges the gap between two electrodes placed within a gas; the air, for example. Its name comes from Davy, who noticed the phenomenon using charcoal electrodes.
The most studied arcs are precisely formed between the carbon electrodes (cathode and anode). Air currents often cause a powdery deposit. Most arcs must luminosity to incandescence volatilized particles in the cathode or the anode of the spiked to give coloring substances arc (red, violet, etc.). It is sometimes added to the anode carbon diverse substances such as calcium, which, when incandescent volatilize continuously radiates light spectrum. Also potassium, which in contact with air burns with violet light and large heat release. the light 103.9 The intrinsic brightness of the light source is a function of its temperature; therefore, to obtain a light source with high brightness, a substance that can be maintained at the highest temperature possible was employed.
As the carbon was that possessed the highest point volatilization known, it was believed that the carbon arc was capable of higher brilliance artificially achieved (this occurs at a temperature of 3,000 degrees C). However, more recent observations it was known was possible to get a much higher brightness.
In the manufacture of the carbon products of the distillation of petroleum are often used. Impurities removed, is given the final shape (cylindrical) coals and subjecting them to high temperature, they become part of graphite. But it was Bremen who suggested the light 103.9 adding to the coals substances to increase its luminous power ('Flame') and other qualities the light 103.9 ('effect').
The dust that is formed during combustion, go to part as oxide and dioxide, finally carbonated. An ashtray located in the bottom of the balloon, drilling small openings, determine a suitable evacuation both powdery residues, as gas. In the latter case, particularly when the coals are mineralized, releasing smoke outside (unlike the pure carbon).
Displaced by large filament, arc lamps were used for years in the powerful "projection the light 103.9 headlights" for cinematography (coals can still be achieved in a trade) and, especially, in the spotlights.
One of them, the Sperry 152.4 cm Flak projector model 1941, was entered in the Register of Army Regulation eighteen months before the case Trancas. By then, the Commander in Chief of the Army Raúl Poggi, orders your manual description, operation and maintenance (AG FT-1) "shall the light 103.9 be compulsorily acquired" by battalions, regiments, and particularly reiteration artillery personnel Army. From reading know the principles governing the design of the projector:
It is characterized by high light intensity and consists of an arc of high intensity also automatically maintained at the focal point of a mirror reflector protected by a drum. Said drum is mounted in a manner allowing the full rotation in the direction and movement in elevation, through a manual control system or electrical distance. The lamp holding a pair of coals or electrodes, the mechanism of regulation allows the advancement of carbon negative to positive and tries to start a new arc.
The drum is equipped with a ventilation system so that the vapors released from the particles and can be continuously swept arc (coal dust and other debris produced the light 103.9 during operation). the light 103.9 The duration of the combustion the light 103.9 of the carbon rods or a graduation used for loading 150 amperes is approximately ninety minutes. For this lamp carbons usually specially made intensive use.
The execution of maneuvers location and projection of the light beam is essential for its speed, range and accuracy. Suffice it to say that should reach easily illuminate a plane, the light 103.9 say, 16 kilometers (although the visibility of the object depends not his enlightenment itself, but the contrast between the object illumination and glare in the surrounding area).
The command consists of a control unit that provides the synch data projector with a pager sound, and the remote control of the projector, making it move and turn towards elevation. The whole system of this model-that is not the only-requires a generator, consisting basically of a petrol engine and generator, convenient