A RARE PORTRAIT OR MEDALLION REDUCTION LATHE
A RARE PORTRAIT OR MEDALLION REDUCTION LATHEUnsigned, mid 19th centuryThe substantial triangular bed applied with two sliding perpendicular faceplate assembles, one larger than the other and with worm gear drive to rear sharing the same long horizontal driving screw terminating with stepped wooden pulleys to right hand side, the front applied with complex pin-pivot assemblies for the mounting and operation of the tracing and cutting bar with the right hand also automatically adjusted in the vertical plane by an arrangement of worm gears connected to the that driving the faceplates, the whole raised on open rectangular end uprights with out-swept hipped feet onto a rectangular platform base cut with slots for bench mounting, (incomplete). 72cm (28.5ins) wide, 28cm (11ins) deep, 36cm (14.25ins) high. The current lot is designed to create a smaller copy of a relief decorated medallion using a system of fine gearing, pivots, detents and a beam to geometrically project a tracing of the pattern mounted on the larger faceplate plate onto the smaller secondary plate at a smaller scale. This form of lathe, which uses principles similar to that of a pantograph, were developed in France during the late 18th century. The current lot however appears to be an English model very much in the style of Henry Maudslay (1771-1831), a British engineer who developed a series of finely engineered lathes for screw-cutting and other purposes during the late 18th and early 19th centuries.Condition Report: The lathe is incomplete as there is a block to the centre of the beam which has vacant pivot holes as well a yoke also with vacant pivot holes to unattached end. The smaller wheel appears to be a replacement. At the large wheel end is a vertical slide controlled by a fine screw fitted with a pivoted double-yoke assembly which also has vacant pivot holes to the second yoke again indicating that an additional part of the mechanism would be attached at this point. Otherwise all threads are operational and the tool is essentially in sound original condition but with bumps, scuffs and discolouration/staining to finishes commensurate with age and workshop use. Please ask the department for additional imagesCondition Report Disclaimer
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A RARE PORTRAIT OR MEDALLION REDUCTION LATHEUnsigned, mid 19th centuryThe substantial triangular bed applied with two sliding perpendicular faceplate assembles, one larger than the other and with worm gear drive to rear sharing the same long horizontal driving screw terminating with stepped wooden pulleys to right hand side, the front applied with complex pin-pivot assemblies for the mounting and operation of the tracing and cutting bar with the right hand also automatically adjusted in the vertical plane by an arrangement of worm gears connected to the that driving the faceplates, the whole raised on open rectangular end uprights with out-swept hipped feet onto a rectangular platform base cut with slots for bench mounting, (incomplete). 72cm (28.5ins) wide, 28cm (11ins) deep, 36cm (14.25ins) high. The current lot is designed to create a smaller copy of a relief decorated medallion using a system of fine gearing, pivots, detents and a beam to geometrically project a tracing of the pattern mounted on the larger faceplate plate onto the smaller secondary plate at a smaller scale. This form of lathe, which uses principles similar to that of a pantograph, were developed in France during the late 18th century. The current lot however appears to be an English model very much in the style of Henry Maudslay (1771-1831), a British engineer who developed a series of finely engineered lathes for screw-cutting and other purposes during the late 18th and early 19th centuries.Condition Report: The lathe is incomplete as there is a block to the centre of the beam which has vacant pivot holes as well a yoke also with vacant pivot holes to unattached end. The smaller wheel appears to be a replacement. At the large wheel end is a vertical slide controlled by a fine screw fitted with a pivoted double-yoke assembly which also has vacant pivot holes to the second yoke again indicating that an additional part of the mechanism would be attached at this point. Otherwise all threads are operational and the tool is essentially in sound original condition but with bumps, scuffs and discolouration/staining to finishes commensurate with age and workshop use. Please ask the department for additional imagesCondition Report Disclaimer
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