Pressure control switch

Claim 1

FOR USE WITH A MINIATURE PRECISION SNAP SWITCH, A FLUID RESPONSIVE ACTUATING DEVICE COMPRISING A HOLLOW SLEEVE HAVING A PORTION AT ONE END OF RELATIVELY SMALL INTERNAL DIAMETER AND A PORTION AT THE OPPOSITE END OF RELATIVELY LARGE DIAMETER, A STATIONARY HOLLOW CYLINDRICAL MEMBER LOCATED WITHIN SAID SMALL DIAMETER PORTION, A SUBSTANTIALLY CUP-SHAPED ACTUATING MEMBER HAVING AN INNER SURFACE SLIDABLE ON AN OUTER SURFACE OF SAID HOLLOW CYLINDRICAL MEMBER AND LOCATED IN THE LARGE DIAMETER PORTION OF SAID SLEEVE, SAID CUP-SHAPED ACTUATOR HAVING AN OUTWARDLY EXTENDING PROTUBERANCE ON THE EXTERIOR THEREOF PROJECTING AWAY FROM SAID HOLLOW CYLINDRICAL MEMBER, A COVER HAVING A CENTRAL OPENING THEREIN IN ALIGNMENT WITH AND ACCOMMODATING SAID PROTUBERANCE AND CLOSING THE LARGE DIAMETER END OF SAID SLEEVE MEMBER, AND MEANS ON SAID COVER FOR MOUNTING AN ELECTRICAL SWITCH HAVING A CONTACT MEMBER IN A POSITION TO BE ACTUATED BY SAID PROTUBERANCE.