Web break detector

Claim 1

A WEB-BREAK DETECTOR FOR MOUNTING ON A WEB-FEDAPPARATUS AND HAVING THE MOVING WEB PASS THROUGH SAID DETECTOR COMPRISING THE COMBINATION OF: A PAIR OF SPACED APART END PLATES, A PIVOT PIN MOUNTED ON EACH OF SAID END PLATES, AN ELONGATED SUPPORT SHAFT CARRIED BY SAID PIVOT PINS, A PLURALITY OF DEPENDING BRACKET MEMBERS HAVING ONE END THEREOF RIGIDLY ATTACHED TO SAID SHAFT, AN ELONGATED VANE MEMBER CONJOINING THE OTHER END OF SAID BRACKETS AND EXTENDING SUBSTANTIALLY THE WIDTH OF THE MOVING WEB, AN ADJUSTABLE COUNTERWEIGHT MECHANISM RIGIDLY MOUNTED NEAR ONE END OF SAID SHAFT AND EXTENDING RADIALLY THEREFROM, A SMALL BLOCK MOUNTED ON THE OTHER END OF SAID SHAFT AND CARRYING THEREON A CONVENTIONAL MERCURY SWITCH; A HOLLOW TUBE ROTATABLY CARRIED BY THE AFORESAID END PLATES EXTENDING THE WIDTH OF THE MOVING WEB, SAID TUBE JUXTAPOSED THE LOWER END OF SAID VANE, A PLURALITY OF AIR EGRESS HOLES EXTENDING LINEARLY SUBSTANTIALLY THE LENGTH OF SAID TUBE, CONCENTRIC SLOTTED SLEEVES CARRIED ON EACH END OF SAID TUBE, A LOCKING MECHANISM APPENDED TO EACH OF SAID SLOTTED SLEEVES FOR SELECTIVELY POSITIONING THE SLEEVES WITH RESPECT TO SAID HOLLOW TUBE; AND MEANS MOUNTED ON SAID HOLLOW TUBE FOR RECEIVING PRESSURIZED AIR.