Metal deforming – By use of tool acting during relative rotation between tool... – With oscillation of work-engaging tool surface about work...
Patent
1987-10-08
1988-11-22
Larson, Lowell A.
Metal deforming
By use of tool acting during relative rotation between tool...
With oscillation of work-engaging tool surface about work...
72109, 29 8, B21B 500, B21D 5344
Patent
active
047856475
ABSTRACT:
A ring sizer includes a handle assembly which rotates about a post with first roller and gear mounted on the post to cooperate with a second roller and gear on the handle assembly. A rotatable handle on the handle assembly moves the second roller and gear towards the first roller and gear. A pair of keeper pins on the handle assembly hold a ring on the first roller while the second roller exerts pressure on the ring shank to lengthen it. A groove in the second roller matches the cross-section of the ring shank to eliminate stretch marks and marring on the ring shank. The ring has a shank with a thick portion diametric to the jewel portion. The method of using a ring sizer calls for tightening the grooved roller adjacent the non-thick portions of the shank, so that no dents are caused in the shank. Beveled edges in the shank eliminate stretch marks and sharp edges during sizing.
REFERENCES:
patent: 110587 (1870-12-01), Palmer
patent: 455430 (1891-07-01), Peckham
patent: 681080 (1901-08-01), Simonds
patent: 802784 (1905-10-01), Remington
patent: 896428 (1908-08-01), Anderson
patent: 1591255 (1926-07-01), Wilson
patent: 2440536 (1948-04-01), Begley
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