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COMPOUND BAR-LIMB MICROSCOPE WITH A 'CAPTAIN PERRY' ARM

MAKER:SWIFT

MODEL: 'PRESENTATION MICROSCOPE'

c.1877

SIGNED: 'JAMES SWIFT, 43 UNIVERSITY ST, LONDON W.C., PATENT'

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The mechanical stage has separate controls for X and Y motion and rotates via a pinion controlled by a knurled knob below the left side of the stage. This gear can be disengaged for manual rotation by moving the gear housing slightly aside. The stage calibrations include silvered scales for X and Y movements as well as a silvered rotational scale. The rotation scale is calibrated from 0-360 degrees in half degree increments, labeled every ten degrees. The finely divided stage X and Y calibrations are labeled from 0 to 100 in single increments and labeled every ten. In use, the slide sits on a top plate which can be pushed forward or backward on rales on top of the mechanical stage, independently of the mechanical movements. This slide can also be removed and reversed. One of the slide rests on this plate is fixed, but the other can be moved forward or backward on the moveable plate on which the slide sits to snug the slide up against the fixed rest. The moveable slide rest has two stage clips and a hole on each side to accept the stage-mounting accessories such as the stage forceps, as an alternative to the holes on the side of the limb. The entire stage is provided with adjustments for centering via knurled knobs on each side.

To see how the rotation gear engages and disengages, click on the last image.


swiftpres Stage


swiftpres Stage


swiftpres Stage


swiftpres Stage


swiftpres Stage