Humidistat adaptable for response to changes in relative or absolute humidity or function as a thermostat

Claim 1

A HUMIDISTAT COMPRISING A MOUNTING BRACKET, A ROTATABLE ADJUSTING MEMBER HAVING A THREADED MOUNTING IN A WALL OF SAID BRACKET AND TERMINATING IN A FREE ABUTMENT END INWARDLY OF SAID WALL, AN ELECTRIC SWITCH UNIT HAVING A RESILIENT CONTACT MEMBER ADAPTED TO MOVE TO CIRCUIT MAKE-AND-BREAK POSITIONS, SAID CONTACT MEMBER REQUIRING AN EXTERNAL FORCE TO MOVE IT TO ONE OF SAID POSITIONS AND BEING SPRING-BIASED TO THE OTHER OF SAID POSITIONS, A PUSHBUTTON TYPE PLUNGER ADAPTED TO ACTUATE SAID CONTACT MEMBERTO ONE OF SAID POSITIONS AGAINST ITS BIASING FORCE, A FIRST SWITCH LEVER OF GENERALLY BELL-CRANK SHAPE HAVING AN ARM ADAPTED TO DEPRESS SAID PLUNGER BUTTON AND A LEVER ARM PROJECTING FREE, AN ADJUSTING LEVER MOVABLY SUPPORTED ADJACENT THE INNER ABUTMENT END OF SAID ADJUSTING MEMBER, A SPRING BIASING SAID ADJUSTING LEVER TOWARD THE ABUTMENT END OF SAID ADJUSTING MEMBER, THE ONE END OF SAID ADJUSTING LEVER PROJECTING FREE IN SPACED RELATION TO THE FREE ARM OF SAID FIRST SWITCH LEVER, A HUMIDITY ELEMENT CONSISTING OF A LENGTH OF HUMIDITYRESPONSIVE MATERIAL CONNECTED TO THE FREE ARM OF SAID FIRST SWITCH LEVER AND THE FREE END OF SAID ADJUSTING LEVER, A SECOND SWITCH LEVER FULCRUMED AT AN INTERMEDIATE POINT AND HAVING ITS INNER EXTREMITY ADAPTED TO ENGAGE AND ACTUATE SAID PUSHBUTTON PLUNGER INDEPENDENTLY OF SAID FIRST SWITCH LEVER AND ITS OUTER EXTREMITY TERMINATING IN THE REGION OF SAID ADJUSTING MEMBER INWARDLY OF SAID WALL, A CAM SECURED ON THE INNER EXTREMITY OF SAID ADJUSTING MEMBER FOR ROTATION THEREWITH AND HAVING A CAM SEGMENT ADAPTED TO ENGAGE THE OUTER END OF SAID SECONDNAMED LEVER WHEN SAID ADJUSTING MEMBER IS ROTATED TO EITHER ONE OF ITS EXTREME POSITIONS AND ACTUATES SAID PUSHBUTTON PLUNGER INDEPENDENTLY OF SAID FIRST LEVER, SAID CAM BEING PROVIDED WITH DETENT NOTCHES ONE FOR EACH