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

What I claim as my invention is:
 
  1.








A screw driver, comprising the combination with a chuck having a transverse slot in the end adapted to hold a plurality of bits, of a plurality of rectangular parallel-sided screw driver bits adapted to be placed side by side in said slot and having transverse slot-engaging ends, the outer bits having stepped portions, means carried by said chuck co-operating with the stepped portions of said bits to effect their relative positioning in the slot to be used either singly or collectively in accordance with their position in said slot, and means for clamping said bits within said slot.
     
  2.








In a screw driver, the combination with a transversely slotted chuck, of a plurality of screw driver bits each formed of a length of square steel having a tapered end extending from side to side thereof, said bits being adapted to be arranged side by side in the chuck slot, the outer bits having notched inner ends, means adapted to cooperate with the notched inner ends of said bits to support the same in extended or retracted position in the slot with their outer tapered ends in or out of operative alignment, and means for clamping said tools in their adjusted positions in the slot.
     
  3.









In a screw driver, the combination with a transversely slotted chuck, of a bit holder arranged in the chuck slot having means at its inner end to cooperate with the inner ends of the bits, a plurality of screw driver bits nested side by side in the chuck slot having outer reduced screw engaging ends, the outer bits having their inner ends notched to co-operate with said bit holder means whereby said bits may be supported in an extended or retracted position in the chuck slot in accordance with their position in the holder, and means for clamping said bit holder on said bits to hold the latter rigidly together in their positioned relation.
     
  4.











In a screw driver, the combination with a transversely slotted chuck, of a plurality of screw driver bits each formed of a length of square steel having a tapered end extending from side to side thereof, said bits being adapted to be arranged side by side in the chuck slot, the outer bits having notched inner ends, a U-shaped holder member fitting in the chuck slot and embracing said bits therein, said U-shaped holder having a raised portion adapted to co-operate with the notched inner ends of said outer bits to support the latter in their extended or retracted position with their outer tapered end in or out of alignment with the intermediate bit or bits in accordance with the position of said notched bits in the holder, and means for clamping said tools in their adjusted positions in the slots.
     
  5.





A screw driver as claimed in claim 4 in which said bits are formed with square shoulders on their inward ends and said U-shaped holder is chamfered at its outward end to facilitate placing of the bits therein, the bits fitting snugly between the walls of the holder whereby the natural resiliency of the latter will retain the bits against accidental displacement.
 
 

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