SU114710A2 - Self-leveling level - Google Patents

Description

Self-leveling auth. St. No. 111448 allows only horizontal leveling, which limits its use.

The proposed level, in addition to geometric leveling with a horizontal beam, also allows trigonometric leveling with an inclined beam. i

This is achieved by the fact that the telescope of the level is provided with a horizontal axis of rotation, and the grid of the autocollimation device .a - with additional strokes located on both sides of the central line.

A general view of the level is shown in FIG. one.

The instrument's telescope 7 is provided with a horizontal axis 2, which allows the tube to be rotated in a vertical plane to produce an inclined line of sight.

The automatic installation of the line of sight occurs due to the presence of a dual-focus autocollimation device with an optical transmission system 3 and a liquid sensing element 4.

FIG. Figure 2 shows the optical layout of the level, explaining its effect. Rays of light a, hitting the telescope after passing the lens 1 and the focusing lens 2 in it, give an image of the staff on the plane of the reticle 3, on which the ranging strokes and the control horizontal line are applied. The number 4 denotes the optic tube of the optic tube.

A bifocal autocollimation device consists of a 5-silver concave-spherical grid with additional strokes applied on both sides of the central

a stroke, from the Lummer 6 cube, the collimator lens 7 and the liquid (with castor oil) sensitive element 8. The transmitting system consists of an extension lens 9, a prism 10 and a rotary prism //.

Rays of light b, after passing through the transparent lines of the grid 5, after passing through the cavity of the telescope, Lummer cube 6, lens 7, fall onto the surface of the reflecting fluid 8. Reflected from the latter, the rays through lens 7 fall into cube 6, from the inner edge of which they an extension lens 9, a prism 10 vi rotary prism // builds an image of a light line on the plane of the reticle 3. The field of view of the warmer tube is shown in FIG. 3

With a horizontal position of the telescope through the ocular on the left half of the grid, the central light from the reference line is visible (for geometric leveling), which, when the pipe is inclined within + 15, the field of view practically does not change its reference to the rail.

Additional illuminated reference lines (positive and negative lines for oblique sighting) are visible in the ocular with appropriate inclinations of the pipe, i.e. with a positive inclination of + 3 ° in the ocular, there is a visible line marked with a plus sign (FIG 3); at a negative angle of inclination in the “minus” sign (FIG. 3). Additional self-aligning lines also do not change the readings on the rail when the inclinations of the optic tube are within ± 15 degrees from exact oblique aiming.

Subject invention

Self-leveling auth. St. No. 111448, characterized in that, in order to realize an inclined self-aligning line of sight, its telescope is provided with a horizontal axis of rotation, and the grid of the autocollimation device is equipped with additional irdes, located on either side of the center: a dash line.

FIG. one

4 3