Mechanical Telegraph-Sounder
Description:
Patent for "a sounder wherein a finger-lever and sounding-lever are combined together with a spring" (lines 13-15) and is "adapted for the use of learners for practicing the manipulation of a telegraph finger-key" (lines 8-10) including instructions and illustrations.
Date:
June 22, 1880
Creator:
Clopton, John B.
Partner:
UNT Libraries Government Documents Department