Tools – Watchmakers' – Mainspring winders
Patent
1976-03-30
1977-06-14
Smith, Al Lawrence
Tools
Watchmakers'
Mainspring winders
29231, B23P 500, G04D 304
Patent
active
040289672
ABSTRACT:
A tool for the precision press-fitting of watch bearings, watch hands, collets and other precision press-fit parts. The tool is used in conjunction and as an attachment with traditional watchmakers' staking sets. The tool consists of a cylindrical metal rod, hollow and slit at its lower end to accommodate friction-fit pushers of various end-dimensions. The cylindrical rod is threaded in metrical or inch pitch for one-third of its lower length to accommodate a knurled disk upon which are marked the divisions of a linear unit, similar to the thimble of a micrometer. At its upper end, the rod is milled to a short rectangular section. Upon this rectangular end is positioned a flat metal clamp with close fitting but not tight, rectangular hole. The clamp is split at its outer end, forming two legs which are form-bent downward to straddle the gooseneck of a staking set. The threaded, micrometer nut is threaded up against the bottom of the staking set's hollow punch-guide. In this set-up, any further manual movement of the knurled nut raises or lowers the cylindrical rod, thus performing the press-fitting functions.
REFERENCES:
patent: 892309 (1908-06-01), Russell
patent: 1543088 (1925-06-01), Ballard
patent: 2071401 (1937-02-01), Hansen
Parker Roscoe V.
Smith Al Lawrence
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