Circuit interrupter

Claim 1

PRESSURE INDICATING MEANS COMPRISING, IN COMBINATION, A HOUSING HAVING A FILLING OF GAS, AN OUTER APERTURED CLOSURE FOR SAID HOUSING HAVING A BELLOWS EXTENDING THEREFROM INTO SAID HOUSING WITH AN INNER CLOSURE AT ITS INNER END SUBJECT TO THE PRESSURE OF SAID GAS, A ROD LIKE MEMBER SECURED AT ONE END TO SAID INNER CLOSURE AND EXTENDING LOOSELY THROUGH THE APERTURE IN SAID OUTER CLOSURE TO A POSITION OUTWARDLY THEREOF, A LATCH SECURED TO AND EXTENDING RADIALLY FROM THE OTHER END OF SAID ROD LIKE MEMBER AND MOVABLE THEREWITH FROM A FIRST POSITION CORRESPONDING TO PREDETERMINED GAS PRESSURE IN SAID HOUSING TO A SECOND POSITION CORRESPONDING TO A DIFFERENT GAS PRESSURE, AN INDICATOR DRUM TELESCOPED OVER SAID OTHER END OF SAID ROD LIKE MEMBER AND ROTATABLY MOUNTED ABOUT THE LONGITUDINAL AXIS THEREOF, A STOP BRACKET CARRIED BY AND EXTENDING RADIALLY INWARDLY FROM SAID INDICATOR DRUM, A SPRING BIASING SAID INDICATOR DRUM FOR ROTATION, SAID STOP BRACKET BEING ENGAGED BY SAID LATCH TO HOLD SAID INDICATOR DRUM AGAINST ROTATION UNDER THE INFLUENCE OF SAID SPRING AS LONG AS SAID LATCH IS IN SAID FIRST POSITION, MOVEMENT OF SAID LATCH TO SAID SECOND POSITION RELEASING SAID INDICATOR DRUM TO ROTATE TO AN ALTERNATE POSITION, AND FIRST AND SECOND INDICATOR MEANS ON SAID DRUM, SAID FIRST INDICATOR MEANS BEING VISIBLE WHEN SAID LATCH ENGAGES SAID STOP BRACKET AND SAID SECOND INDICATOR MEANS BEING VISIBLE WHEN SAID INDICATOR DRUM OCCUPIES SAID ALTERNATE POSITION.