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Automatic Regulator for Pneumatic Flues
Patent for a regulated valve to automatically maintain air pressure in a pneumatic conveyor flue. Excessive air pressure causes a secondary valve to open and vent the pressure while at the same time impeding air flow downstream.
Date:
May 28, 1901
Creator:
Caffey, Charles B.
System:
The Portal to Texas History
Boat-Propeller.
Patent for a boat propeller, which is inexpensive and adaptable to small boats. The propeller can go forwards or backwards and use multiple oars.
Date:
February 5, 1901
Creator:
Caffey, John W.
System:
The Portal to Texas History