335 / | HD | ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS |
2 | DF | ELECTROMAGNETICALLY ACTUATED SWITCHES {30} |
159 | .~ Plural independently operable switches {3} | |
160 | DF | .~.~> Interlocking {1} |
162 | DF | .~.~> With unitary housing, support or flux path |
163 | DF | .~.~> With unitary or common magnetic flux source |