Adjustable plunger switch

Claim 1

A PLUNGER SWITCH ADAPTED FOR FRICTONAL RETENTION IN AND AXIAL ADJUSTMENT THROUGH A CYLINDRICAL BORE THROUGH A SUITABLE SUPPORT MEMBER, SAID SWITCH COMPRISING A CASING WHICH INCLUDES A TUBE HAVING A FREE OPEN END, A PLUNGER GUIDED FOR AXIAL MOVEMENT THROUGH SAID TUBE WITH ONE END OF THE PLUNGER EXTENDING INTO SAID CASING, SPRING MEANS NORMALLY RESILIENTLY PROJECTION SAID PLUNGER AXIALLY TOWARD AND THROUGH THE FREE END OF SAID TUBE TO A PREDETERMINED OPERATIONAL POSITION, SWITCH CONTACTS CARRIED BY SAID PLUNGER AND CASING FOR ACTUATION RESPONSIVE TO AXIAL MOVEMENT OF THE PLUNGER, SAID PLUNGER BEING MOVABLE INWARDLY COMPLETELY THROUGH SAID FREE END, WHEREBY AXIAL PRESSURE ON THE PLUNGER IN EXCESS OF THAT REQUIRED TO THUS MOVE IT INWARDLY COMPLETELY THROUGH SAID FREE END MAY BE EXERTED ON SAID FREE END OF THE TUBE TO ADJUST THE AXIAL POSITION OF SAID TUBE WITHIN THE SAID BORE, SAID TUBE HAVING A MEDIAL FIRST PORTION SPACED AXIALLY FROM SAID FREE OPEN END AND NORMALLY OF GREATER EXTERNAL DIAMETER IN ONE DIAMETRAL PLANE THAN SAID THROUGH BORE TO PROVIDE A FRICTIONAL BUT AXIALLY ADJUSTABLE FIT OF THE TUBE WITHIN THE BORE, AND OF SMALLER INTERNAL DIAMETER THAN SAID BORE IN A DIAMETRAL PLANE TRANSVERSE TO SAID ONE DIAMETRAL PLANE FOR GUIDING ENGAGEMENT WITH SAID PLUNGER, A SECOND PORTION EXTENDING FROM SAID FREE OPEN END TO SAID FIRST PORTION BEING OF CYLINDRICAL CONFIGURATION AND PROPORTIONAL FOR FREE AXIAL RECEPTION AND MOVEMENT IN SAID BORE TO FUNCTION AS A PILOT FOR GUIDING SAID FIRST PORTION INTO THE BORE DURING ASSEMBLY OF SAID PLUNGER SWITCH.