Watchmen's Time Detectors Operated by Batteries or Magneto Generators (1900)
Holtzer-Cabot Electric Company · Holtzer-Cabot Electric Company · leaf 32
Gravity Drop. NEEDLE DROP. This compact form of drop is substantially, thesame as the Gravity (see above), except that the needleis fastened to the pivot, and the action inverted (seecut). It is thoroughly reliable, and those who preferthis style may be certain of good service. Needle Drop. FRENCH…
