Screwdriver with handle for storing bits

作者: Richard Trincia

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摘要: A screwdriver is provided having a handle for storing bits. The stored bits are held in the transverse orientation with respect to long axis of by sleeves resiliant material which press fit into openings through handle. have internal diameters slightly smaller than outside being stored. To remove one use, user simply removes bit previously used and magnetically shaft presses it opening sleeve holding desired bit, thereby freeing and, at same time, used. then affixed magnetic means.

参考文章(2)
Gerhardt Gottfried Walter, Punch holder for hammer handles ,(1927)