Lead-sharpener

Claim 1

A PENCIL-LEAD SHARPENER COMPRISING A BASE HAVING A BOTTOM, A PERIPHERAL FLANGE PROJECTNG UPWARDLY FROM SAID BOTTOM AND A CENTRAL CIRCULAR PROJECTION EXTENDING UP FROM THE BOTTOM AND HAVING A PERIPHERAL GUIDING SURFACE A BELL-SHAPED BODY RECEIVED IN THE UPPER PORTION OF SAID PERIPHERAL FLANGE OF THE BASE AND FITTING TIGHTLY THEREIN, MEANS LIMITING ENTRY OF SAID BODY INTO SAID FLANGE SO THAT THE LOWER EDGE OF SAID BODY IS SPACED UPWARDLY FROM SAID BOTTOM, SAID BELL-SHAPED BODY HAVING A TOP PORTION WITH A CENTRAL APERTURE HAVING AN ANNUAL RESILIENT LIP AND DEFINING AN EQUATORIAL SEGMENT OF A SPHERICAL SURFACE WITH UPPER AND LOWER OPENINGS OF SMALLER DIAMETER THAN THE DIAMETER OF SAID SPERICAL SURFACE, A SOCKET EXTENDING THROUGH SAID APERTURE AND COMPRISING A SPHERICAL BALL PORTION FITTING CLOSELY AND REVOLVABLY IN SAID APERTURE AND HAVING A DIAMETER GREATER THAN THAT OF SAID UPPER AND LOWER OPENINGS AND BEING THEREBY RETAINED IN SAID APERTURE, AND A HOLLOW STEM PORTION EXTENDING DOWNWARDLY FROM SAID BALL PORTION AND HAVING A LONGITUDINAL PASSAGEWAY ADAPTED TO RECEIVE A PENCIL, AND AN INWARDLY FACING FRUSTOCONICAL ABRASIVE SURFACE INSIDE A LOWER PORTION OF SAID BELL-SHAPED BODY ABOVE THE LOWER EDGE THEREOF AND COAXIAL WITH SAID APERTURE AND SAID GUIDING SURFACE, SAID STEM PORTION BEING ORBITALLY MOVABLE AROUND AND IN ENGAGEMENT WITH SAID GUIDING SURFACE AND BEING GUIDED BY SAID GUIDING SURFACE TO MOVE THE LEAD OF A PENCIL RECEIVED IN SAID PASSAGEWAY ORBITALLY ALONG SAID ABRASIVE SURFACE TO SHARPEN SAID LEAD, A LOWER PORTION OF SAID CENTRAL PROJECTION OF SAID BASE AND A LOWER PROTION OF SAID FLANGE BELOW THE LOWER EDGE OF SAID BELL-SHAPED BODY DEFINING AN ANNULAR RECEPTACLE BELOW THE LOWER EDGE OF SAID ABRASIVE SURFACE TO RECEIVE PULVERANT MATERIAL ABRADED FROM SAID LEAD, THE CLOSE FIT OF SAID BALL PORTION IN SAID APERTURE PREVENTING ESCAPE OF SAID PULVERANT MATERIAL FROM THE TOP PORTION OF SAID BELL-SHAPED BODY IN THE EVENT THE SHARPENER IS INVERTED.