Draftsman's compass

Claim 1

A DRAFTSMAN''S COMPASS COMPRISING A FIRST LEG MEMBER RIGID FROM END TO END THEREOF AND HAVING A COMPASS POINTER RECEIVING BORE OPENING AT ITS LOWER END AND AT THE OUTER SIDE THEREOF IN UPWARDLY SPACED RELATION TO ITS LOWER END, A POINTER DISPOSED IN SAID BORE, A MANUALLY ADJUSTABLE MEANS FOR FIXEDLY SECURING SAID POINTER TO SAID FIRST LEG MEMBER, A SECOND LEG MEMBER OF SUBSTANTIALLY LESS LENGTH THAN SAID FIRST LEG MEMBER, SAID LEG MEMBERS BEING PIVOTALLY CONNECTED AT THEIR UPPER ENDS, MANUALLY OPERABLE MEANS FOR ADJUSTING SAID LEG MEMBERS RELATIVE TO EACH OTHER AND FOR SUPPORTING THEM IN THEIR ADJUSTED POSITION, SAID SECOND LEG MEMBER HAVING AN OUTWARDLY AND DOWNWARDLY PROJECTING PIVOT EAR AT ITS LOWER END, A LEAD HOLDER MEMBER HAVING LATERALLY SPACED PIVOT EARS ON ITS UPPER END DISPOSED IN EMBRACING RELATION TO SAID PIVOT EAR ON SAID SECOND LEG MEMBER, FRICTION ELEMENTS DISPOSED BETWEEN SAID PIVOT EARS ON SAID SECOND LEG MEMBER AND SAID LEAD HOLDER MEMBER, A PIVOT SWINGABLY CONNECTING SAID PIVOT EARS, SAID SECOND LEG MEMBER HAVING A STRAIGHT ABUTMENT SPACED UPWARDLY FROM SAID PIVOT AND INCLINED UPWARDLY AND OUTWARDLY OF THE AXIS OF THE SECOND LEG, SAID LEAD HOLDING MEMBER HAVING TWO ABUTMENTS ARRANGED ANGULARLY OVER THE TOP AND DOWNWARDLY ALONG THE INSIDE OF SAID PIVOT AND ALTERNATIVELY ENGAGEABLE WITH SAID ABUTMENT OF SAID SECOND LEG IN DRAFTING USE RELATION WITH SAID SECOND LEG IN GENERALLY EXTENDED RELATION BELOW SAID SECOND LEG AND IN OUTWARDLY ANGLED PROJECTING RELATION TO SAID SECOND LEG TO FACILITATE SHARPENING OF A LEAD IN SAID LEAD HOLDER MEMBER, THE FRICTION IN SAID CONNECTION FOR SAID LEAD HOLDER MEMBER TO SAID SECOND LEG MEMBER BEING SUCH AS TO HOLD THE LEAD HOLDER MEMBER IN DRAFTING USE POSITION AND ALSO WHEN ADJUSTED TO SAID ANGULAR POSITION.