| 194 / | HD | CHECK-ACTUATED CONTROL MECHANISMS |
|
| 302 | DF | INCLUDING MEANS TO TEST VALIDITY OF CHECK {4} |
| 303 | DF | .~ By testing material composition {4} |
| 304 |  | .~.~ Having electric circuit completed by check {7} |
| 305 | DF | .~.~.~> Circuit includes thermocouple |
| 306 | DF | .~.~.~> Circuit includes three or more contacts |
| 307 | DF | .~.~.~> Circuit includes movable contact {1} |
| 310 | DF | .~.~.~> And means to impart thrust to check {1} |
| 312 | DF | .~.~.~> And means to stop check at contact {1} |
| 315 | DF | .~.~.~> Circuit includes spring contact |
| 316 | DF | .~.~.~> Circuit includes elongated contact (e.g., long slide, etc.) |