337 / | HD | ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES |
298 | DF | THERMALLY ACTUATED SWITCHES {7} |
382 | DF | .~ With longitudinally expansible solid element {7} |
384 | DF | .~.~ With manual or other mechanical contact control means {4} |
387 | .~.~.~ Comprising frictional clutch or lost motion means |