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Jen-son lathe with the headstock casting cantilevered away from the end of the bed.
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The jockey pulley, almost certainly a modification by a previous owner, that allowed the belt from the base-mounted countershaft to pass over the front face of the headstock.
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The carriage traverse handle (top right), like that fitted to the tailstock barrel, was of very distinctive design with finger cut-outs and a cast-in radial bar that extended beyond the rim and carried a knurled handle.
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The leadscrew ran down the centre of the bed, n the style of an early Drummond flat bed (with the changewheel drive passing through a mechanism that appears to have operated a dog clutch) the drive being taken down the back of the bed by a drive shaft to a set of gears arranged, in a 1 : 1 train, across the tailstock end of the bed.
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The compound slide rest used a short cross slide with a long (but not long enough) cast extension at the rear to protect the feed screw from swarf. In order to provide a long enough travel the cross-slide ways were extended well forwards but, with the slide in any normal working position, the front of the screw was left exposed. Unusually for a small lathe of this era the cross-feed micrometer dial was large and clearly engraved.
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The simple base-mounted countershaft, had a large central bearing with the drive and driven pulleys overhung on opposite sides.
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A foot pedal was provided to lift the countershaft and allow changes of speed.
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The drive from handwheels to leadscrew was taken by a rear-mounted drive shaft to a set of gears arranged, in a 1 : 1 train, across the tailstock end of the bed - although it is possible that the gearing could have been adapted to other ratios by the use of a banjo arm or pick-off gears.
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A slightly different Jen-son - possibly an earlier model
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Lever-action collet closer
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