| 摘要 |
1. In a cryptographing machine, a commutator comprising a disc of insulation having an axial opening therethrough and having a peripheral flange thereon, and having a plurality of slots formed in its inner surface, a plurality of contacts anchored in a ring in one surface of said disc, a plurality of second contacts each having a springy end retaining that contact in readily detachable position in one of said slots and a springy intermediate portion and a contact proper supported by said intermediate portion, and conductors connecting said contacts to said second contacts in pairs disposed heterogeneously around said ring.
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