The instrument is supported by a weighted and turned wooden stand and column. The height is adjustable using a thumb screw. The shape of the instrument is a trapezoid. On the front is an oval-shaped cut-out. On the back is a large rectangular window in front of which can slide cut-out pieces (the one in there is a square with a small needle in its center). On one side is a circular opening. On the other side are two square openings, in front of which cut-out pieces can slide (one has a small piece of glass). There would have been at least one prism inside the instrument.
The instrument is supported by a weighted and turned wooden stand and column. The height is adjustable using a thumb screw. The shape of the instrument is a trapezoid. On the front is an oval-shaped cut-out.
Electrical operated dome-type sturdy stable heavy body with the resiliently mounted motor working on 220V AC 50 Hz single phase for vibration-free performance with built-in 5- speed regulator and non-removable swing-out rotor.
The motor stirrer having maximum speed up to 4000 r.p.m. Unit is clamped to C.P. rod fitted on a heavy cast iron base. The height and angle of the stirrer can be adjusted according to the requirement. Variable speed motor with 1/20 H.P. Regulator is fitted with S.S. stirrer rod to give smooth and noiseless operation.
Folding type smooth focusing with 3 elements high definition focusing lens supported by picture sharpness compensator to achieve brilliant projection with optimum contrast. Equipped with two low voltage 24V 250W halogen bulbs with a lever to instantly shift to second provided bulb in case of sudden failure of the running one. Mini turbo cooling fan thermal cut out for safety. Writing surface 285 x 285mm. Supplied in molded luggage case.