"Two ton" is the weight of the vehicle. "Worm" and "wheel" is how the drive is transmitted to the back axle. This was pioneered by Dennis in the UK and Pierce Arrow in the USA, who both used the worm and wheel as their logo.
The caption says "two-ton worm-drive armoured truck...", which makes much more sense than a two worm vehicle. A worm and wheel changes the direction of rotation and has a gearing (reduction) effect. More here: http://en.wikipedia.org/wiki/Worm_drive
My initial reaction was to say the truck is a White, so I'm a bit surprised to see it says manufactured by International. Vanderveen's "Army Vehicles Directory to 1940" says these hulls were mounted on White, Mack and Locomobile (Riker) chassis, so still a bit puzzled by the caption.
-- Edited by Runflat on Wednesday 22nd of June 2011 08:36:37 PM
There is another thing too: the article says that EIGHT vehicles were built, which is interesting, as we know that only three were built for New York National Guard.
I think this vechicle is Mack. Mack AB lorry was equipped with worm drive and it was 2 ton version.
Base of White was 1,5 ton and Locomobile was large sedan, not a lorry at all. Besides that, only one armoured car in a photo showing all three cars of NY National Guard is having two shielded machine guns, like this one in this article.
One more thing: this page of Mack is showing the same kind of photo as the article, but the car is full of writings. Look at the back and shadows, all same. Photos are different, because in another hatches are open, but I think the place and time are same. This makes to a conclusion that article and photo in it is a result of cencorship.
http://www.macktrucks.com/default.aspx?pageid=255
-- Edited by MTorrent on Thursday 23rd of June 2011 10:39:26 AM
-- Edited by MTorrent on Thursday 23rd of June 2011 10:40:25 AM
-- Edited by MTorrent on Thursday 23rd of June 2011 10:43:02 AM
And the explanation for International Motor Company is just regular free market economy: ownership arrangements.
History of Mack tells that:
"A new holding company, the International Motor Truck Corporation, is formed; it assumes the notes payable obligations of the International Motor Company and owns 98 percent of its stock. The International Motor Company, through its ownership of the Mack Brothers Motor Car Company, the Saurer Motor Company, and the Hewitt Motor Company, becomes the operating organization, with its main plants in Allentown, PA (Mack), Plainfield, NJ (Saurer), and Brooklyn, NY (Hewitt).
The International Motor Company also owns the International Mack Motor Corporation, which had been set up in December 1915 to run most of the company-owned branches. However, by the end of World War I, the title of this company is changed to the Mack-International Motor Truck Corporation."