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Title: |
1857 article - G. M. Bodine, agent for watchmakers' lathe |
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Source: |
Transactions of the American Institute of the City of New York 1857 pg 118 |
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Insert Date: |
11/9/2024 7:57:22 AM |
This is one of the most complete lathes for watchmakers ever offered to the trade. It combines in one instrument all that is useful or desirable in the lathe way, and is adapted for doing the work of a universal jeweling and pivot lathe; the graver for turning pivots being held in the Slide Rest, instead of the hand. It is strong, and not liable to get deranged, and so simple that any ordinary workman can turn the smallest pivots as perfectly as the most experienced workman can by the old method. Pivots can be turned with a graver held in the hand, as on the ordinary lathes, when desired. The end of the Mandrill has an inside and outside screw; the outside screw is for the Pivot Chuck and Universal Head; the inside can be used for ordinary job work and small turning, and a variety of Chucks may be fitted to facilitate the finishing work. The Slide Rest is on an entirely new principle, combining unusual strength and firmness with great simplicity. The traversing part moves on an arc, and rises as you cut from the centre.
C is a cylindrical bar, projecting six inches beyond the Head, on which the Slide Rest and common turning rest T moves. D is a cylinder, with socket, to receive cutters for turning and jeweling; also centres for uprighting and turning, from two centres, moved back and forth by the large screw at the end. E is a cutter for turning pivots, in its place in the socket. P is a reciprocating screw, carrying the cutters to and from the centre.
Fig. 2, is a Chuck for turning pivots, having a screw cut inside of the shaft, to fit a corresponding screw on the Mandrill of the lathe, and has a part removed, to show the position of the back centre H, with a wheel and pinion chucked for turning. H is a back centre, with a conical hole to receive the end of a pinion, and is fitted so as always to present a true centre, and is sufficiently tight to retain its position in moving back and forth, to accommodate the different lengths of pinions. |
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