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| This is a Cutler-Hammer "Grid Leak” rheostat, circa 1924. The slotted metal link is there so that you can adapt it to parallel any capacitor. The pin that contacts the large disk is made from graphite. The ad states that the graphite pin wears away thus having to necessitate the occassional cleaning of the the large disk that it makes contact with. (Photo by Tom Brent) |
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| This Cutler-Hammer ad appeared in the January 1924 issue of Radio News, It explains the use of the grid leak rheostat. Click on image to enlarge. (Ad provided by Tom Brent) |