--- In STMFC@..., Anthony Thompson <thompson@...> wrote:

Dennis S. (no longer signing his name) wrote:

As I understand this so far, the Bohn patent covered a hatch cover
that allowed the hatch plug to be left open while still baring
access to the ice bunker, while the Moore device is a permanently
installed heater.

The important Bohn patent, created by John Ames (No. 625309)
and sold to Bohn, was a "syphon" system of curved metal strips in the
bulkhead between the ice tanks and the car interior, supposedly to
assist air convection. There were also Bohn-patent details in the
collapsible bulkheads used in some cars. The hatch cover, to me, is
NOT the important Bohn device. I discussed this, and provided
literature citations, in the PFE book.

Tony Thompson Editor, Signature Press, Berkeley, CA

How'd I miss signing my name?

Thanks Tony. I wasn't aware of the internal workings of the Bohn device. Apparantly, there were some details to improve circulation in the Moore system, so they DO overlap in function.

Dennis E. Storzek the first, king of... (Oh wait, that's Garfield Goose :-)