Motion of the substage and also allowed it to be easily swung out of the way. One was for Spencer's 'quick-screw' substage mechanism which allowed adjustment of vertical On the latter date two patents were listed. It has inscribed on it the patent dates of Maand December 11,1900. The example shown on this page is an early example of his continental style Microscopes far into the twentieth century. He then went on to produce his famous 'Trunnion Microscope' (very similar to the Ross Bar Limb), which can be seen onĮventually over twenty American Makers in the late 19th century, only Spencer and Bausch & Lomb continued to produce His first were horzontal microscopes on the Chevalier plan. HISTORY OF SPENCER MICROSCOPES Charles Achilles Spencer is generally acknowleged to be the first major This microscope is in almost new condition.

The mirror carrier canĪlso slide up and down the tailpiece. Swinging tailpiece which has a sprung catch to hold it in the vertical position if desired. The gimballed planoconcave mirror rides on a Mount unless the iris above is fully open, preventing damage. A patented feature prevents the condenser from being inserted into the This condenser can be removed from its housing there are two iris diaphragms, one above and one below The substage condenser rises or falls via a helical 'quick screw' as described in the patent. It is of chrome plated brass, and has verniers in X and Y axes. It has holes for two stage clips, but these have been replaced with a later mechanical stage with separate X and Y controls. The surface of the stage is of vulcanite. There are three objectives on a triple nosepiece. Quick motion to the fine focus and the larger knob a slower one. The fine focus, adjusted by a silvered knob, has two patents as noted below. There is a patented adjustment for pressure of the outer fitting against the bearings of the coarse adjustment, which is adjusted by a silver-colored knob. Arising from the foot is a short pillar, to which the main body of the microscope is attached via a compass joint.Ītop the microscope is a standard 22 mm diameter ocular which fits into the chrome-plated graduated draw-tube.Ĭoarse focus is by diagonal rack and pinion (a Swift innovation).

This 'Continental Style' microscope sits on a Y-shaped 'horseshoe' foot.

Carl zeiss microscope serial numbers