Thermal switch having temperature sensitive pellet and movable contact

Claim 1

IN COMBINATION, IN A MINIATURE FUSE: A METALLIC CUPSHAPED CASING HAVING A HORIZONTAL BOTTOM, A CYLINDRACEOUS SIDE WALL, AN UPPER INWARD FLANGE AND A TRANSVERSE SHOULDER ADJACENT SAID INWARD FLANGE; A THERMALLY COLLAPSIBLE PELLET ADJACENT SAID BOTTOM; A RELATIVELY STRONG VERTICAL COMPRESSION COIL SPRING WITH ITS LOWER END EXERTING A DONWARD PRESSURE ON SAID PELLET; A HAT-SHAPED MEMBER HAVING A CROWN, A VERTICAL CYLINDRACEOUS WALL, AND A RIM, WITH SAID CROWN ON AND RECEIVING THE UPPER END OF SAID STRONG SPRING WITHIN SAID CROWN; A RELATIVELY RIGID VERTICAL COMPRESSION COIL SPRING WITH ITS LOWER END ON SAID RIM OF SAID HEAT-SHAPED MEMBER; A RELATIVELY RIGID INSULATOR COVER MEMBER IN SAID CASING WITH THE TOP OF ITS EDGE ENGAGING THE UNDER SIDE OF SAID INWARD FLANGE, AND WITH ITS UNDER SIDE ENGAGING SAID TRANSVERSE SHOULDER AND THE UPPER END OF SAID RELATIVELY WEAK SPRING; TWO VERTICAL LINE CONDUCTORS PASSING THROUGH SAID INSULATOR COVER MEMBER AND HAVING LOWER ENDS ENGAGING SAID CROWN WHEN SAID PELLET IS NOT COLLAPSED, SAID RELATIVELY WEAK SPRING MOVING SAID CROWN AWAY FROM SAID ENDS OF SAID LINE CONDUCTORS WHEN SAID PELLET IS THERMALLY COLLAPSED, THE TOP OF SAID CROWN BEING FLAT AND RECEIVING THE UPPER END OF SAID STRONG SPRING, THE LOWER ENDS OF SAID CONDUCTORS BEING FLAT, SAID WEAK SPRING BEING RELATIVELY WIDER AT ITS UPPER END AND RELATIVELY NARROWER AT ITS LOWER END, SAID WEAK SPRING BEING HELD SPACED FROM SAID CONDUCTORS BY SAID WIDER UPPER END AGAINST SAID INSULATOR COVER MEMBER AND BY SAID NARROWER LOWER END AGAINST SAID RIM.