Allis-Chalmers Betatron Lab



Every now and then I learn something new about Allis-Chalmers. One of those new tidbits I have recently discovered is the betatron lab the company had at the West Allis Works. Last year I had the opportunity to step inside this old testing lab and see some of the equipment left behind. The machine was essentially a giant X-ray used to inspect for imperfections in the large components made in the foundry. This was housed in a small concrete lab on the factory grounds.

A site was chosen on a bluff on the northeast side of the complex where the foundry dumped waste sand. It was close enough for equipment to be hauled in by rail and truck but also far enough away to avoid interference from ground vibrations caused by factory presses and hammers. The building was finished and operational in September of 1952 and cost $342,000. The company said that the cost of the betatron lab was recouped in less than a year from savings earned from inspecting equipment for quality and precision.

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The walls of the “L” shaped x-ray bay were constructed with steel reinforced concrete walls that were 6 feet thick and 20 feet high. Approximately 1000 cubic yards of concrete were used. The bay had a 25-ton bridge crane that moved components into position and then reloaded them on trailers or rail cars. The 22 million volt betatron hung suspended from a 7.5-ton bridge crane that allowed the unit to be moved around the entire work space. It could raised 20 feet above the floor, rotated 360 degrees around and tilted 170 degrees. In addition to the testing bay, the building had several other rooms for the testing processes. The control room housed the equipment that operated the giant x-ray behind the thick concrete walls. There was also a darkroom and viewing room that processed the film. Other areas included the electrical equipment room, storage, offices and wash rooms.

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Safety was one of the major components that went into designing and building the lab. The thick concrete structure shielded workers inside and out from the radiation exposure. Safety switches and warning devices were put in place to protect technicians from accidental exposure. After testing was completed, workers tested the lab with radiation meters to ensure no radiation escaped from the bay.

Allis-Chalmers made other betatron units for medical use in cancer treatment. Just another fine example of the sophisticated products the great Milwaukee manufacturer had a hand in.

AC Drafting Table

About 6 years ago I had the opportunity to acquire an awesome piece of AC history that I couldn’t pass up. We restored a Farmall M for an implement dealership, and the gentleman who set up the restoration said he had a piece of Allis-Chalmers history I might be interested in. He showed me these pictures of a drafting table from the Allis-Chalmers factory in West Allis.

I think I paid $70 for it. I have actually never seen it put together. I got it home and it went into the rafters in my folks’ garage. Seems silly, but it is a big piece of furniture! My plan was always to set it up once I got a place of my own, which is what is going to happen now. I think it would be fun to get a blueprint of a tractor or other part that AC drafted to display it on the drafting board side. Once in a while an AC blueprint will show up on Ebay, but maybe AGCO Corp would be able to help me out.

This drafting table is a May-O-Matic built by Mayline in Sheboygan, Wisconsin. The company began in 1939 specializing in drafting tables, blueprint files, and straightedges. I contacted the company to ask if they have any record or information about this desk. Unfortunately, the company does not because of its age; However, they were able to tell me this:

We don’t have a great deal of information to pass along.  The drawer pull was used until the late ‘70s, at least until 1977.  We do not have a record of how many Allis Chalmers bought, but I would imagine they had quite a large engineering department back then.

Like the Mayline representative said, Allis-Chalmers had a huge engineering department; which makes me wonder what happened to all the others when the place cleared out? I am pretty fortunate and happy that I acquired this piece. Once I get this all set up I will be sure to share some pictures of it.


AC Farm Brochures

I have a little collection of Allis-Chalmers farm equipment brochures sitting on my bookshelf. So I thought that I would take an hour out of my day (literally) and scan just two of the dozen or so that I have. One is on the hay making equipment the company manufactured, and the other is about the 8000 series tractors that Allis-Chalmers was making the last few years before the tractor line was sold. If I get enough interest, I might attempt to scan all of them and make a documents page.

 Click the picture to bring up the PDF.