Anyone have info on this diaphone?

E&NRCo.
Posts: 6
Joined: Sun Jan 15, 2017 5:10 pm

Anyone have info on this diaphone?

Postby E&NRCo. » Mon Oct 30, 2017 11:23 pm

I recently bought this diaphone, not even knowing what a diaphone was at that point. Reportedly this came off a vessel that was built in the early 1920s, probably here in the Pacific Northwest, and probably in Vancouver, B.C. I guess that might be relevant if this is a Canadian-made diaphone? There is no maker's plate and no sign of holes for one. On top of what I'll call the "generator" (until I get the terminology right!) there is a stamped three digit number as shown in the photos. The horn had some pretty heavy rust scale inside so the marine story fits from that angle. The only similar trumpets I have seen are on much larger Type F Diaphones. The trumpet is 43 inches long and about 13.5 inches in diameter at the mouth and weighs about 80 pounds I'd say. The piston diameter is 2 & 1/8" and overall length of the piston is 2 & 15/16".

The piston is a very close fit so I'm guessing either this one didn't get much use or it was very well lubricated when it was in use.

I have begun to restore it, and would appreciate any input on what this horn is exactly, how old and where it was made. Input on restoration dos and don'ts would also be helpful. Thanks in advance!
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E&NRCo.
Posts: 6
Joined: Sun Jan 15, 2017 5:10 pm

Re: Anyone have info on this diaphone?

Postby E&NRCo. » Mon Oct 30, 2017 11:25 pm

A few more photos.
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Timothy
Posts: 1
Joined: Wed Aug 16, 2017 8:07 pm

Re: Anyone have info on this diaphone?

Postby Timothy » Wed Dec 20, 2017 1:53 pm

Nice find. I was looking up info about diaphones a while ago and I found out that the very early diaphones had BRASS pistons. instead of aluminum, that gives it a deeper tone that can travel farther!

From the looks of it the exhaust slots at the rear of the horn are smaller then A gamewell diaphone so it must have a been a custom made diaphone. Also the front of the horn has screws holding the brass/bronze cylinder inside the casing so it can’t be a gamewell diaphone.


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