US1892131A - Microscope stand - Google Patents

Description

Dec. 27, 1932. M. BERGER I MICROSCOPE STAND Filed Nov. 25. 1930 Patented Dec. 27, 1932 UNITED STATES PATENT OFFICE mx BERGER, E JENA, GERMANY, assrenon 'ro THE Emu cam. mass, or JENA, enamm MICROSCOPE STAND application filed. November 25, 1930, Serial No. 497,978, and in Germany December 4, 1929.

I have filed an application in Germany, December 4, 1929, of which the following is a specification.

The great majority of microscopes are finely focused by a pinion head which is dis-. posed at the upper part of the stand at-the same height as the tube. However,iuse is made also of another type of microscopes, which have their pinion head at the lower 13 part ofthe stand and, therefore, are completely different in construction not only as regards the focusing device but also asregards the stand.

The present invention applies to micro- 5 scopes that have a lower pinion head and are s finely focused by means of the well-known devicein which the tube is supportedby a lever that, being actuated by a gearing, for instance a toothed-wheel gearing, imparts it a slow motion, and aims at providing this lever in the upper part of the stand, while the gearing is disposed in the lower part of the stand. Notwithstanding the fact that the pinion head for fine focusing is provided be- 13 low and that for better convenience its axis is even made tocoincide with-the tilting axis of the microscope stand, this arrangement permits of giving the stand its usual form again, which, compared with the construction 01? the hitherto known microscopes of this type, not only provides a considerable economical-advantage but also allows of overcoming the disadvantages regarding focus- 'ing accuracy inherent in the said kind of 3 microscopes. a

A' specially suitable device is obtained when the lever that is disposed in 'the upper .part of the stand and supports the tube is coupled by a push-rod to the gearing.

- The accompanying drawing shows a 'constructional example of the object of the invention partially in a section and partially in elevation. I

The stand represented in the drawing consists of a base plate a on which a hollow pillar bracket 1) is so mounted as toallow of being tilted on an. axis The pillar bracket 6 supports a tube a which, together with a slide 0 whereon it is coarsely adjustable by means of ahead 0, rests on a lever d onto which it is pressed byits own weight as .well

as by a spring e. In the lower part of the pillar bracket bis a toothed-wheel gearing which reduces the speed of the turning movementof a head 7 whose turning axis coin- 65 cides with the tilting axis A of the pillar b.

The toothed-wheel gearing consists, of a'pinion g which is fixed to the axle of the head 7 and meshes with a toothed-wheel g and of a pinion g which is fast with the axle of the toothed wheel 9 and-meshes with teeth h of a lever h. This lever-h turns about an axis B and is jointed at its free end to a push-rod z'which is connected also with the lever d.

As 'can be deduced from the foregoing, a

turning movenfent of the milled head 7' causes the tube'to be slowly raised or lowered according to the direction in which the head 7 is turned.

I claim -1. On a microscope stand a carrier adapted to hold a microscope tube and being movably mounted on the stand, a lever mounted in the. upper part of the stand and acting 'on the carrier, a pinion head disposed at the lower part of the stand, a gearing being situated in the lower part of the stand and coupled to the pinion head, and a push-rod connecting this gearing with thesaid lever.

2. On a microscope stand a base,-a hollow pillar. bracket tiltably mounted on the base, a carrier adapted to hold a microscope tube and being movably mounted on the pillar bracket, a lever provided in the upper part of-the pillar bracket and acting on the car 35 rier, a pinion head disposed at the lower part of the stand, a caring being situated in the lower. part. of t e pillar bracket, the axis of the pinion head coinciding with the tilting axis of the pillar bracket, a gearing being disposed in the lower part of the pillar bracket and-coupled to the pinion head, and a pushr'od connecting this gearing with the said lever.

MAX BERGER.

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