The first hot filament diode tube was invented in 1904 by Fleming, the first hot filament triode tube was invented in 1907 by DeForest. However it was not until 1913 that it was determined that high vacuum was actually needed for efficient and reliable operation of these tubes. So true hot filament vacuum tubes were not made and used until 1913.
There are several types of filament tubes. The questioner was looking for the 1913 tubes invented by Coolige. These consisted of an evacuated glass envelope which insulates the anode at one end from the carthode at the other. This consisting of the tungsten filament and the anode a water-cooled block of copper.
Joseph Swan invented the carbon filament because to see light back in the days. Which turned out to be a light bulb.
Yes, the resistance of the filament of a light bulb is what generates enough heat to make the filament glow and produce light.
Much of modern technology was invented in that time, including the Internet, most of the technology relevant for computers, vacuum tubes, transistors, spacecraft, etc., etc., etc....
Higher input current means higher voltage. A bulb contains one filament (tungsten) when input power supply passing through this filament, the filament gets hot and makes a red color and then yellow. This filament needs only electrons flow, but if we are operating higher current bulb efficiency will down, when the filament burns out.
Because an 'ordinary' bulb has a metal filament which glows through resisting the electricity flowing through it. This eventually weakens the filament and it breaks. The 'energy-saver' bulbs are basically miniature fluorescent tubes - these have electrodes at either end of the tube which generate electricity, this 'excites' the molecules of the fluorescent coating - producing light. They only fail when there's no more coating inside the tube - which means they last MUCH longer !
John Dunlop invented the pneumatic tubes.
A Hungarian person
Filament bulb
Lewis Latimer
scienctists
James watt
Thomas A. Edison
Joseph Swan
yes he improved the light bulb that Edison invented using the carbon filament.
6.3
Thomas Edison It was actually Irving Langmuir (of General Electric), also an American. Edison's incandescent lamp used a carbon filament, as did that of his contemporary, England's Joseph Swan who got there before Edison (who invented a longer lasting carbon filament). William Coolidge improve on Langmuir's filament by making it longer (the familiar twisted shape) and brighter. Humphrey Davy had invented a platinum filament way back in 1809 that worked, but was too expensive for commercial use. Those that followed him failed to cotton on to the use of a metallic filament and went for carbon instead. What Tomas Edison can claim is the 'development' of a commercially useful light bulb using a carbon filament - though this was superseded by the tungsten filament not long after.
The float tube was invented in the 1950's by a fisherman. Float tubes were around for 30 years before they gained popularity in the 1980's.