Vigilink is effn the link you provided...

Maybe these might work...

http://photos.google.com/share/AF1QipP51xzkJbrPL3EGKwpRFDTPf0oq6-Nyk8zsBEOQ_B2mP1ZdV7zYOO6OOcgJ2pZm7Q/photo/AF1QipPhjF67NlYmqHm-xVfC__B0q8yDnznIQh659vmm?key=NDJUOEUyY2tjVEVlR2laa3laVjFmbl9kSHBySDNn" rel="nofollow - http://photos.google.com/share/AF1QipP51xzkJbrPL3EGKwpRFDTPf0oq6-Nyk8zsBEOQ_B2mP1ZdV7zYOO6OOcgJ2pZm7Q/photo/AF1QipPhjF67NlYmqHm-xVfC__B0q8yDnznIQh659vmm?key=NDJUOEUyY2tjVEVlR2laa3laVjFmbl9kSHBySDNn

http://photos.google.com/share/AF1QipOKJ1YfQ_Ts1noibjYCQtU6PIAyb25TJIk7eUV5WRciuIsuAhaVx1-S99KLtTDZYw/photo/AF1QipNWdME6g4TYmpTgde9v_HIwoYHz_1m2Lbl0dQae?key=R0Qzb0lIR00yNm05WnBEa1BuWE5WY2R0U0k3UXJn" rel="nofollow - http://photos.google.com/share/AF1QipOKJ1YfQ_Ts1noibjYCQtU6PIAyb25TJIk7eUV5WRciuIsuAhaVx1-S99KLtTDZYw/photo/AF1QipNWdME6g4TYmpTgde9v_HIwoYHz_1m2Lbl0dQae?key=R0Qzb0lIR00yNm05WnBEa1BuWE5WY2R0U0k3UXJn

JC- sorry about that, they work for me, thanks for putting up another link for people to see the pics.

John- good point, I hadn't thought about the fact that gas lights were on their way out at that point in time.  Probably a very short lived idea on tractors?  I wonder too how many were actually ever outfitted with such lights?  Not being familiar with exactly how they work, I can't speak to how the rough ride would affect them.  Anyone have any first hand knowledge of gas lights?

Yes and acetylene is a VERY unstable gas, I would imagine the accidents would have been plenty.  Transferring the stuff is very very dangerous, much like smoking and loading a black powder pistol.

I agree, it would be really neat to see one of those on a tractor! 

Very interesting Chris, I'd love to see and hear more about what information you have gathered.

He bought the G tractor after he got here ,He wanted to fill the trailer. LOL

 

 

 

 

 

 

 

So, the Prestolite tank is an Acetylene GENERATOR.  There's a certain amount of danger in any circumstance, but it's all a matter of perspective.  You could be killed by a glass of water... you could be burned by an exploding battery... or caught up in a PTO belt.  If you understand how and why it works, perhaps you won't think it so scary.

Acetylene lights were really the first 'high intensity' lighting system.  Acetylene gas, when passed through a proper nozzle, and behind a proper reflector, can lay down an awesome beam without a huge volume of fuel, and without generating rediculous amounts of waste heat... and it's NOT 'new' technology, it's very old, and very proven... and every bit as safe as oil lamps, but a whole lot cleaner burning.  Aside from cars, trucks, and tractors, they also were used on bicycles and motorcycles, Steamships and steamboats used acetylene lamps for searchlights and navigation lights. Railroad locomotives- ditch lamps and main lamps... Caving and Mining:  Miner's headlamps... Movies and stage- spotlights.

The acetylene generator is a simple gadget, works on a simple principle:

When you take a piece of Calcium Carbide (CaC2), and put a drop of water (H2O) on it, a chemical reaction occurs, and the primary byproduct is Calcium Hydroxide (CA(OH)2... and acetylene gas... C2H2.

2H2O + CaC2 -> Ca(OH)2 + C2H2

Low pressure.  Very low pressure.

As long as you keep dripping water on the carbide, it will keep emitting gas, but in return, the carbide is consumed... it turns into Calcium Hydroxide... 'limewater'.  Nothing dangerous there.

The acetylene generator doesn't 'hold' large quantities of acetylene... and it doesn't develop high pressure.  Stop the drip, the gas stops. 

The flame has to be set properly... there needs to be sufficient gas flow for the orfice to draw oxygen for a 'clean' white-hot burn.  Turn up the lamp too far, the flame gets dim, because the reaction is not fast enough to supply the flame.

Shaking, vibrations... no effect on an acetylene system.

The acetylene generator usually contains a water chamber (for storage), and a carbide box (for placement of carbide), and a storage box for extra carbide.  To operate the lamp, add water, and place a piece of carbide into the chamber.  Open the drip valve, wait a minute or so, then open the lamp.  Allow it to flow for a minute, to purge the air, then light, and adjust the lamp to full brightness.  To increase output, increase drip rate of water, and adjust lamp accordingly.  If you turn the water down too far, or the carbide runs out, the lamp will get weak, and eventually, extinguish.

To 'blow up', you need to disconnect the line to the lamp, put a ton of carbide in the bin, and flood the chamber, and wait for several hours for the area to accumulate gas.  Then it'll go woof... for a moment.

Jacob, that Prestolite acetylene tank shown in your brochure is a special version of the small acetylene tanks that are still in common use. The difference is that the valve is placed off to one side on the head of the tank, rather than at the center like a standard welding tank..  It can then be used mounted in the horizontal position with the valve to the top without drawing off the liquid acetone that is in the tank into the lighting system. Acetylene gas will dissolve in the liquid acetone under pressure and then can be safely stored at pressures much greater than the critical 15 psi which is all free acetylene can be compressed to without a big 'Boom"!! This Prestolite system was very commonly used on cars and trucks up to about 1912 when electric headlights became more practical. I still see the occasional one of those tanks around still being used for acetylene welding.

Guys with pre 1912 antique cars are always on the lookout for one of these tanks.

As Dave pointed out, acetylene generators were also used, but they were mounted in an upright position.

Dave, thank you for the great information!  It is always nice when someone can explain things in a way that makes sense.    But one thing that I'm not quite clear on here.  I understand your explanation for acetylene generator lamps (add calcium carbide, drip water on it, burn the resulting gas to make light) but this particular add is not that type of lamp is it?  Or am I not quite understanding everything?  This add calls for just the one tank "style B prest-o-lite tank, with gas and key"  and not a water tank, etc... like you describe.   So does that make this system more like an acetylene torch? tun on the tank full of acetylene gas, light the lamp.  No "making" the gas involved?

Thanks Phil, you typed faster than I.   I wonder how many of these ever got sold and put on 20-35's if this technology was on the way out by the 20's?

Jake- Phil is right... I was looking at the doc with my phone (small image) and didn't catch that it was a "B" tank.

Prestolite packaged acetylene in small tanks for vehicle lighting... basically, motorcycles and vehicles, small soldering/brazing torches, etc... and you could exchange a tank at hardware stores, farm co-ops, and stuff like that... a convenience thing- a consumer didn't have to carry a dry box of carbide and water (good thing in winter, right?).

Modern acetylene is compressed, then saturated in acetone.  This prevents the acetylene from being explosive if a tank, valve, or fitting becomes ruptured.  To get an understanding... grab a plastic bottle of Dr. Pepper, and open the cap.  IT foams up, and  spills out, right?  Now, open it SLOW.  You'll see bubbles form, but they'll burst before coming to the cap.  That's carbon dioxide, under pressure, and saturated in the soda syrup.  When you relieve the pressure, the lack of pressure allows the CO2 to expand and leave the bottle... but it can only leave so fast.

That's what happens in a 'modern' tank... and it's because of that solution that you cannot lay an acetylene tank on it's side for use... the acetone will get ejected (in a foamy mess) into the valve, regulator, hose, and torch immediately.

The prestolite tank that you see there, is not for a dissolved solution... it's pressurized gas.  it MAY be stuffed full of something fiberous (asbestos, etc) to limit it's exit in event of a problem.

I would not be surprised to find a fair amount fitted to tractors and used into the post WW2 era, simply because they worked.

Re. carbide gas generators... one of the 'big' companies that supplied carbide for lamps... was UNION CARBIDE.  Later on, when acetylene lamps were retired in favor of electric lamps, Union Carbide started making... Flashlight batteries.  ;-)