Watchmen's Time Detectors Operated by Batteries or Magneto Generators (1900)
Holtzer-Cabot Electric Company · Holtzer-Cabot Electric Company · leaf 97
Fig. 2 … SPEED REGULATING RHEOSTAT. FIELD RHEOSTAT pM/E illustrate above our Motor Speed Regulator, and Field Rheostat, both ofwhich are absolutely fire-proof, being constructed entirely of bare iron andcopper wire with slate top and back and latticed iron-work casing. All our Motors, of whatever size and…
