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.
Item Type:
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Patent
Partner:
UNT Libraries Government Documents Department