SU148549A1 - Ultramicrotome - Google Patents

Description

Ultramicrotomes are known that contain a fixed frame, a caliper with a knife, and an electromagnet with an oil damper (see, for example, the works of CITEIN Advanced Scientific, Technical and Industrial Experience, Issue 10, P-61-72 / 10).

The disadvantage of these ultramicrotomes is the impossibility of calibrating the slice thickness directly in angstroms. In addition, they are inconvenient in operation and do not allow adjusting the thickness of the cuts regardless of the cutting speed.

The proposed ultramicrotome does not have these disadvantages. The essence of the invention is that the ultramicrotome feeding device is a metal rod, in the section two lithium titanate ceramics are located.

The drawing shows a diagram of the proposed ultramicrotome.

Ultramicrotome consists of a bed /, a spring 2, a metal rod 5, two Plates 4, lithium titanate, an electromagnet 5 and a knife 6.

A metal rod 3 is fastened to the fixed frame / spring 2, in the section of which two ceramics 4 of lithium titanate are mounted. The cuts are made when the object 7 is moved with the help of an electromagnet 5 (combining an adjustable oil damper inside itself) past the knife 6. During the direct course of the object, a constant voltage is applied to the plate 4. The magnitude of the object feed is determined by the applied voltage. The object is reversed when it is removed from the voltage plate. Subsequent cutting is applied to the plates with a higher voltage. The thickness of the cut is determined by the difference in the voltage applied during subsequent cuts.

The design of the ultramicrotome allows a series of cuts of 40-50 pieces to be made automatically, as well as single cuts (in particular, you can obtain cuts with a thickness of more than 0.1 m). Change current divider and resistance I can get different steps

No. 148549

stress and specified thickness of cuts. In order to increase the expansion of the piezoelectric plates and to simplify the manufacture of the object-holder rod, an electrical parallel connection of two plates 4 and their mechanical sequential connection were carried out. An ultramicrotome is provided with an automatic supply of voltage pulses by means of a jaw mechanism 10 interlocked with an electromagnet 5. Cutting speed is controlled by a damper 11.

The Central Design Bureau of the Ministry of Health of the USSR concluded from October 30, 1961 that the proposed ultra-micro has a industrial utility.

Subject invention

An ultramicrotome containing a fixed frame, a caliper with a knife, an electromagnet with an oil damper, characterized in that, in order to calibrate the thickness of the sections directly by wangstroms, the feeding device is made in the form of a metal rod, in the section of which two plates of lithium titanate are mounted.

Z 3