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Coin Controlled Electrical Weighing Scale.

Description: Patent for a new and improved coin-operated electrical scale. This design "relates to improvements in electrical weighing-scales that may be tripped by electricity; and the main object of [the] invention is to so arrange the electric circuit that it may be closed for tripping the indicator by inserting within the machine a coin or like-shaped metallic piece" (lines 16-22).
Date: November 13, 1888
Creator: Smith, William R.
Partner: UNT Libraries Government Documents Department