Temperature responsive force transmitting device

Claim 1

A TEMPERATURE RESPONSIVE MOTION TRANSMITTING DEVICE WHICH COMPRISES: A GENERALLY CYLINDRICAL TUBE HAVING OPPOSED CLOSED AND OPENENDS; AN EXPANSION MATERIAL WITHIN SAID TUBE ADJACENT THE SAID CLOSED END THEREOF, THE VOLUME OF WHICH MATERIAL CHANGES UPON CHANGES IN TEMPERTURE THEREOF; A PISTON SLIDABLY GUIDED WITHIN THE SAID OPEN END OF SAID TUBE; A NECK FORMED BY THE INNER WALL OF SAID TUBE INTERMEDIATE THE SAID ENDS THEREOF, DEFINED BY AN ELONGATED AND ESSENTIALLY STRAIGHT INNER WALL OF SAID TUBE; SPACED OUTWARDLY FLARED SHOULDERS EXTENDING COMPLETELY AROUND THE INTERIOR OF SAID TUBE AT OPPOSITE ENDS OF SAID NECK DEFINING AN OBTUSE ANGULAR SLOPE WITH THE INNER SIDE WALL OF SAID TUBE BEYOND EACH END OF SAID NECK; A RESILIENT PLUG SEATED WITHIN SAID TUBE AT SAID NECK HAVING PORTIONS THEREOF DISPOSED IN JUXTAPOSITION WITH EACH OF SAID SHOULDERS AND HAVING AN END PORTION POSITIONED ADJACENT AN END OF SAID PISTON; WHEREBY EXPANSION OF SAID MATERIAL WILL CAUSE BEING PLUG AND PISTON TO MOVE SLIDABLY WITH SAID TUBE.