Another rare carbide cannon is the Krasher Kannon of 1930. Joseph Gombotz told me that Wily was very forcefull in policing his patents. When a competitor surfaced, Wily would threaten them with lawsuit and then offer to buy them out. This is supported by Conestoga advertising at the time that mentioned that infringers would be prosecuted. This may be part of the reason there are only a couple of Krashers and Daytons known to exist.
The carbide went in the little round container at the top and the water was below.
The plunger was pulled and then released to drop carbide into the water.
A small tube communicated the gas to the cannon chamber.
A larger plunger with internal valves expelled the products of combustion and drew in fresh air and acetylene.
I have fired this cannon, but it requires practice to get any rate of fire and the advertiesed 50 shots pre minute is not achievable.
Ignition was electric using a single cell battery. The gas generator shown above is a replica.