Lock washer

Claim 1

A DISHED RESILIENT STAMPED SHEET-STEEL LOCK-WAHSER OF UNIFORM WALL-THICKNESS, HAVING A GENERALLY CYLINDRICAL OUTER PERIPHERY AND HAVING A PLURALITY OF CIRCUMFERENTIALLY DISTRIBUTED WEDGE-LIKE TEETH PROJECTING FROM THE CONCAVE FACE THEREOF ALONG AN OUTER MARGINAL PERIPHERAL ZONE THEREOF AND CONFINED TO SUCH ZONE AND RIGID IN RELATION TO THE BODY OF THE WASHER, EACH OF SAID TEETH HAVING TWO GENERALLY RADIALLY DISPOSED SIDE-SURFACES GENERALLY NORMAL TO THE CONCAVE FACE OF THE WASHER AND FORMED IN INTEGRAL CONTINUATION THEREOF THROUGHOUT THE RADIAL EXTENT THEREOF WITHOUT ANY SEVERANCE BETWEN SAID SIDE-SURFACES AND SAID CONCAVE FACE AND HAVING A CYLINDRICAL OUTER END-SURFACE BETWEEN THE OUTER ENDS OF SAID SIDE-SURFACES WHICH ENDSURFACE IS AN EXTENSION OF THE CYLINDRICAL OUTER PERIPHERY OF THE MAIN BODY OF THE LOCK-WASHER AND HAVING A SINGLE INCLINED SURFACE BETWEEN SAID SIDE-SURFACES AND EXTENDING FROM SAID END-SURFACE TOWARDS AND MERGING INTO THE CONCAVE FACE OF THE LOCK-WASHER, SAID END-SURFACE AND SAID INCLINED SURFACE INTERSECTING EACH OTHER AT AN ACUTE ANGLE AND FORMING A WORK-ENGAING ACUTE-ANGLED EDGE GENERALLY PARALLEL WITH THE OUTER PERIPHERY OF LOCK-WASHER INTERMEDIATE SAID TEETH THEREOF, AND DEPRESSIONS ALONG THE OUTER PERIPHERY OF THE LOCK-WASHER AND THE CONVEX FACE THEREOF OPPOSITE TO THE CORRESPONDING TEETH THEREOF.