. Beck microscopes. Microscopes. No. 3280. No. 3280. Sloan object glass changer, including adapter, spanner and 2 fittings ... £1 17 6 No. 3281. Extra fittings 0 8 0 No. 3282. Case to hold 3 fittings with object glasses attached in dust-tight spring holders 0 11 6 This takes the place of the revolving nosepiece and has certain advantages. It consists of an adapter which screws on to the nose of the microscope. This adapter has on one side a sloping projection (A), and on the other a screw clamp (B) with a bevelled nut (C). The adapter is clamped to the nosepiece of the microscope by a screwed
. Beck microscopes. Microscopes. No. 3280. No. 3280. Sloan object glass changer, including adapter, spanner and 2 fittings ... £1 17 6 No. 3281. Extra fittings 0 8 0 No. 3282. Case to hold 3 fittings with object glasses attached in dust-tight spring holders 0 11 6 This takes the place of the revolving nosepiece and has certain advantages. It consists of an adapter which screws on to the nose of the microscope. This adapter has on one side a sloping projection (A), and on the other a screw clamp (B) with a bevelled nut (C). The adapter is clamped to the nosepiece of the microscope by a screwed ring (D), which is provided with slots, into which a halfpenny will fit, for tightening it up. Loose fittings are supplied, one of which is screwed on to each object glass. Each fitting has a bevelled gap which fits loosely over the bevelled nut (C) of the adapter and swings round into position when a turn of the milled head (B) forces the fitting against the sloping projection (A) and holds it firmly in position. An object glass can be changed almost as rapidly as with a revolving nosepiece, and it allows of the use of any number of object glasses. Each adapter has screwed studs with clamping screws, which form the stops in both directions when the object glass is in the correct position These can be adjusted by means of a spanner supplied for the purpose, so that each lens can be centred with an accuracy that is never possible with a revolving nosepiece, because the error of each individual object glass cannot be compensated for. No. 3257 No. 3300. No. 3301. No. Dust-tight double nosepiece Dust-tight triple nosepiece Dust-tight quadruple nosepiece -^- No. 3S11. No. 3810. No. 3812. No. 3257. Eyeshade, to shield the unemployed eye from light and enable it to remain open during observation No. 3277. Stage micrometer on 3x1 slip, engraved 1/10 and 1/100 m/m No. 3278. Stage micrometer on 3x1 slip, engraved 1/100 and 1/1000 inch No. 3276. Eyepiece micrometer, scale 5 m/m.,
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Keywords: ., bookcontributorgerstei, bookleafnumber93, booksubjectmicroscopes
