| 194 / | HD | CHECK-ACTUATED CONTROL MECHANISMS |
| 302 | DF | INCLUDING MEANS TO TEST VALIDITY OF CHECK {4} |
| 303 | DF | .~ By testing material composition {4} |
| 320 | DF | .~.~ Having magnetic field acting on check {3} |
| 321 | ![]() | .~.~.~ And scavenger mechanism {2} |
| 322 | DF | .~.~.~.~> Movable magnet |
| 323 | DF | .~.~.~.~> Movable portion within check passageway |