Re: Bohn Ventilators was Truss Rod Reefers

Anthony Thompson <thompson@...>

Mike Aufderheide wrote:
Could you give me a few line synopsis of how the Bohn
ventilators worked? Were they in place of standard
ice hatches. Did they function as ice hatches and
Andy Sperandeo has answered the basic question already. The "standard ice hatch," before the days of one-piece steel hatches, was really two parts: the plug, which fitted into the bunker opening and made a seal, and the cover, which was the weather protector. The Bohn ventilator just replaced the cover, as Andy described. There was still a plug inside, and it was still latched up when in ventilation service.

Tony Thompson Editor, Signature Press, Berkeley, CA
2942 Linden Ave., Berkeley, CA 94705
(510) 540-6538; fax, (510) 540-1937; e-mail, thompson@...
Publishers of books on railroad history

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