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Improvements in Escapements for Time-Pieces
Patent for inprovements in escapements for time-pieces involving levers and duplex escapements as a way of improving force and regularity in time-pieces. Patent gives instructions and provides illustrations.
Date:
October 21, 1879
Creator:
Laughlin, Abner G.
System:
The Portal to Texas History
Improvement in Spring-Hinges.
Patent for a new spring hinge design which will "either open or close the door or gate after it has passed an angle of forty-five degrees" (lines 20-22) including illustrations.
Date:
June 24, 1879
Creator:
Barry, William G.
System:
The Portal to Texas History