Vacuum Devices

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All samples that are vacuum devices (Including vacuum tubes, discharge lamps, incandescent lamps, probably a few other things, including things that LOOK like vacuum devices but aren't exactly) are listed on this page as well as their original element page.

These are my samples!

Smaller Carbon Filament Lightbulb

This is an unusually small bulb to have a carbon filament, but judging by the shape/curve of the filament, I'm pretty sure it's carbon.

Picked this one up at a local flea market, new in the box after probably 60 years.

Date added(year-month-day):20120229, sample number:96

Tags(Elements in sample):carbon, vacuum

Long Light Bulb

This rather long light bulb is commonly used in desk lamps where a long then source of light is wanted, however this one is a bit smaller then usual. Besides the tungsten filament, which is heat resistant and gets hot enough to give off light, there's also support wires holding it in place, made out of molybdenum, and they appear to be held in place with cobalt-blue glass!

Date added(year-month-day):20111130, sample number:86

Tags(Elements in sample):tungsten, molybdenum, vacuum

More Flashbulbs

This is, as of sometime in 2011, my entire collection of flashbulbs and flashbulb related items, including the external flash reflector you mount the bulbs in, and the 22.5 volt battery required to set them off, which is impossibly difficult to find these days.

Date added(year-month-day):20111130, sample number:85

Tags(Elements in sample):zirconium, vacuum

Vacuum Tube With Uranium AND Mercury

This most unusual vacuum tube, which serves as a rectifier for high voltage AC electricity, happens to also contain mercury, which vaporizes inside to help the almost-vacuum conduct a little better, and also employs uranium glass in the seals between metal and glass, because adding uranium slightly changes how the glass expands, so by having uranium glass between normal glass and metal, you can avoid the glass cracking/the metal falling out. Quite an unusual piece, a rare combination of three of my favorite things!

Date added(year-month-day):20111012, sample number:74

Tags(Elements in sample):uranium, mercury, vacuum, radioactive

High-Pressure Xenon Lamp

This high-pressure xenon lamp was used in a movie projector in a fairly typical movie theater, it's supposedly "burnt out" but I really have no way to test it, so I'm not sure. These are quite unusual because most movie theaters don't hand them out to anyone who asks, and they're expensive to get new, I thank my dad for this sample.

Date added(year-month-day):20110906, sample number:60

Tags(Elements in sample):xenon, vacuum

Krypton Flashlight Bulbs

These small incandescent flashlight bulbs contain some krypton (I don't know how much) which helps stop the filament from corroding (Because krypton is inert and will not corrode the tungsten filament) and also adds a little more white light due to the light ionization of krypton around the hot filament. Some people don't believe krypton does any good or that there is actually any in these bulbs, I've been working out a way to test though, I'll change this when I figure it out.

Date added(year-month-day):20110906, sample number:59

Tags(Elements in sample):krypton, vacuum

Carbon Filament

This unusual little light bulb was purchased at a local flea market like most my samples, and is very unusual because the filament, or little wire that glows red hot, is made out of a carbon fiber instead of a tungsten wire. It doesn't look too old, but carbon filaments haven't been used in a very long time, so I'd guess this is 60+ years old.

Date added(year-month-day):20110822, sample number:55

Tags(Elements in sample):carbon, vacuum

Mercury Vapor Lamp

Small mercury vapor lamp, found at a flea market from someone who had probably no idea what it was. If I had to guess this would be an excellent source of short-wave ultraviolet, if it didn't blind and give you cancer at the same time. Another reason I bought this is because I have a xenon projector lamp just like it, they make such a nice pair.

Date added(year-month-day):20110809, sample number:54

Tags(Elements in sample):mercury, vacuum

Tungsten Filaments

The incandescent light bulb has been around for quite awhile, and it's pretty standard around the world to use tungsten for the actual wire that glows red hot, due to tungsten having one of the highest melting points of any(affordable) element on the periodic table. These two bulbs are my smallest and biggest that still retain the "light bulb" look of having a brass base and everything. Small one is something like 0.06 watts, big one is 500 watts and I might add a very unusual find at a flea market, from a guy who got it from a barn sale and had it proudly hanging on his wall since high school.. I owe him one for passing it on to me

Date added(year-month-day):20110802, sample number:52

Tags(Elements in sample):tungsten, vacuum

Barium Getter

Vacuum tubes such as these require that there be little to no gas of any kind inside the envelope, in order to allow thermionic emissions to flow through open space. Perhaps you didn't understand that, but it's important that vacuum tubes have VACUUM. You can pump most the air out, but it's nearly impossible to pump it all out, so they take a metal that's reactive to air, and they vapor-deposit (Boil it and then let it settle) it on the inside of the glass, this way any air that's left will be absorbed by the metal and turn into metal nitride, or metal oxide. Barium is perfect for this.

Date added(year-month-day):20110726, sample number:33

Tags(Elements in sample):barium, vacuum

Xenon Flash Tube

Pretty much everyone knows what a strobe light is, and this is the bulb that makes the flashes(Filled with xenon to make very white light), but the actual importance of it is that the flashes of light are very brief, unlike other kinds of flashes that need to "cool down". Because these flashes are so brief, they can be carefully timed and used to pick up details from things moving by very fast, which makes checking products on a big assembly line much easier... Or you can just screw around and dance in the flickering light for a good time.

Date added(year-month-day):20110726, sample number:32

Tags(Elements in sample):xenon, vacuum

Zirconium Flash Bulbs

These old flash-bulbs where one-use, and basically caused a small bright explosion in a glass bulb for a "flash" for photography. This explosion was done by taking a reactive metal, sometimes magnesium but more often zirconium, and using thin strands of it which burn faster then thick chunks. It also helps if you fill the glass bulb with pure oxygen, which will speed up the burn. Occasionally these shattered when used, or got so hot you couldn't remove them for a few minutes.

Date added(year-month-day):20110726, sample number:27

Tags(Elements in sample):zirconium, vacuum

Argon Fluorescent Lamp Starter, Lit

See below for info on what this is, except in this picture, it's lit up using high voltage from a camera flash. Don't mess with these unless you know what you're doing, 300 volts to the heart will most likely stop it and kill you.

Date added(year-month-day):20110724, sample number:16

Tags(Elements in sample):argon, vacuum

Argon Fluorescent Lamp Starter

This is the starter switch of a large fluorescent lamp, being that it blocks the path of current for awhile making filaments in the end of the fluorescent bulbs heat up, and once heated, turns on the high voltage between them. This heating is required because the heat helps ionize some of the gas in the bulbs, and once partially ionized, it is DRASTICALLY easier to start an arc in any gas. The switch itself is two electrodes that do NOT touch until heated, and said heating can be achieved by an arc through argon gas, giving it just enough time delay to heat up the fluorescent tube.

Date added(year-month-day):20110724, sample number:15

Tags(Elements in sample):argon, vacuum

NE-2 Neon Bulb, Lit

Same bulb as the entry below, except I managed to turn it on with high-voltage circuitry from a camera flash I took apart. Don't mess with these unless you know what you're doing, 300 volts to the heart will most likely stop it and kill you.

Date added(year-month-day):20110723, sample number:8

Tags(Elements in sample):neon, vacuum

NE-2 Neon Bulb

These miniature neon bulbs were very commonly used in the control panels of old equipment, their main advantage being that they can run on 120 volts straight from the wall (With a resister to lower the amps). You can tell they're neon bulbs because the two wires inside the glass don't touch each other or have anything connecting them, therefor the gas between them becomes a plasma and emits light. If you have a orange glowing light switch someplace in your house, it probably has a NE-2 bulb in it just like this one.

Date added(year-month-day):20110723, sample number:7

Tags(Elements in sample):neon, vacuum

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