Lee Valley Tools Woodworking Newsletter
Vol. 1, Issue 5
July 2007
 
Featured Patents
 

  6.












A screw driver, comprising the combination with a transversely slotted chuck, of a plurality of parallel sided bits adapted to fit into said slot, the outer of said bits having notches forming offset inner ends, a U-shaped metal bit holder adapted to fit into said slot and having a squared stud arranged centrally of the bottom thereof, said stud being slightly wider than either of said bits and adapted to support said bits in an extended position, the offset ends of the outer bits being adapted to fit between the stud and the side walls of the holder leaving the inner bit projecting and adapted to be placed in said holder with said inner notched ends engaging said stud to support the outer ends of said outer bits in co-operative alignment with the inner bit, and means for clamping said holder and bits rigidly together.
     
    Peter L. Robertson
   

 
 

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