spring on it, and a button; by PAINE'S PATENT SYSTEM OF VENTILATING RAIL- The use of the ventilator just described, in pressing the finger on the button, while hold- winter, entirely removes all annoyances ol ing the can by the handle, the valve is opera- ROAD CARS. cold draughts, and maintains an… … ken measures to secure a patent for an im- of the carriage. The invention is so simple provement in chimneys to prevent them from in its detail, that one skilled in carpenter's the cones. The axis of the cones is set on a The accompanying engravings represent smoking. The nature of the invention…
Patents · Railroad · Steamboat · Tubes · Claim · Chimney · Square inches · Lime · Carbonic acid · Steam engines · Scientific American · Rotary motion · Ken measures · Patent office · Water space · York city · Square root
Internet Archive · Public domain (published before 1931). Free to use for anything.
