Doody System Damper Regulator Patent (1909)

Published on June 16, 2014 | Comments

Thanks to Gerry Gill for finding the patent for this ingenious device that combined a damper regulator with a pressure gauge, water gauge, safety device. It was issued to B.R. Doody for low pressure steam and analogous systems in 1909.

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Doody System Damper Regulator Patent (1909)

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