DE586913C - Adjustable leveling staff - Google Patents

Description

Adjustable leveling staff The invention relates to a leveling staff, with which it is possible to map each height point to be recorded to its position Sea level can be read directly to the millimeter without calculations.

There 'are band slats known, which by means of a rack and gear can be raised and lowered.

Furthermore, measuring rods are known, which with a screw device are provided. However, this is only an adjustment device for simple Measuring rods, especially those that have become too short through use and brought back to normal by means of a screw device.

The invention relates to adjustable leveling staffs whose Outer batten has a longitudinal slot that z. B. one tenth the size of a die Meter in different colors identifying, rotatable inner bar for observation releases.

With these leveling staffs, the innovation is based according to the invention in essential in the fact that the top plate located on the foot is a screw or Threaded rod carries, the screw nut of the common carrier of the outer batten and the inner batten forms and on its surface an interrupted by a web Has a circular groove. A pin attached to the bottom of the inner batten engages in this groove one, so that by turning to the right or left the up and down movements of the whole Staff for setting the position of the crosshair of the leveling instrument for the first time is effected on the known height of the starting point. As a result of the groove can afterwards the inside bar can be turned back to set the decimeter marks, without changing the height setting. All other high points can then can be read directly from the staff without calculations.

According to the invention, the inner batten can also have a cross section Form a regular decagon. -On their side faces are then used for decimeter reading Marks attached, which are on the individual surface i dm apart and vary in height by 1 cm from surface to surface.

Since the setting of these decimeter marks is attached to the one on the outside batten If the centimeter graduation is readable, there is no numbering on the staff.

The drawing shows the subject of the invention in an exemplary manner Embodiment, namely: Fig. I a front view of the leveling staff with indicated Ablation settings, Fig. 2 a partial section through the upper end of the Lath and view of the ten-sided inner lath with the staggered ones Marken, Fig.3 shows a partial section through the lower end of the staff with a view of the "built-in drive for the exact height adjustment, Fig. q. a floor plan the bar.

As with the well-known roller slat, it is the different meter colors (e.g. white, red, yellow, blue, etc.) supporting roller or inner batten a from the outer batten f such including that only a tenth of the circumference of the inner batten a is visible through the longitudinal slot (Fig. i) in the outer batten f.

In the illustrated embodiment, the inner batten consists of a roller a, the cross-section of which forms a regular decagon (Fig.4). On each these ten side faces are displayed as decimeter pointers one above the other at a distance of i dm marks z attached, which increase from surface to surface by i -cm.

In the lower part (Fig. 3) of the inner batten there is an opening through which a screw c is freely passed. This screw ends at the bottom in the top plate g. The outer lath f, which at the same time carries the inner lath a, rests on a nut b, which can be screwed up and down along the screw c. This screw nut b has a groove e running all around on its surface, which is only interrupted at one point h by a web. A pin d located at the bottom of the inner batten engages in this groove. So if you turn the inner batten in the direction of the arrow in Fig. 4, the height setting remains unchanged, and only one other of the ten side surfaces of the inner batten and thus another row of marks z in the longitudinal slot of the outer batten a is visible. In the opposite direction of rotation, on the other hand (in Fig. 4), the height of the entire staff is adjusted.

The. entire leveling staff can, in order to prevent the effects of the weather, be made of all metal.

When performing a leveling, the lath is raised using the top plate g, set up vertically at the starting point i1 of the leveling element (Fig. i).

This starting point is at its height above sea level after the land survey known and is believed to be at: 42.692 m above sea level.

At point i, where the crosshair of the leveling instrument meets the staff (Fig.i), the centimeters and millimeters of the starting height, i.e. 92 mm, must now be read on the actual staff f on the right (calculated from above in Fig. I), which is achieved by turning the ten-sided inner batten a. Here, the pin d causes the screw nut b to lift the entire staff f, a by stopping at the end h of the groove e , until the crosshairs of the leveling instrument give the reading 92.

By turning back the ten-edged inner lath a is now still the decimeter number 6 (42.692) is set, which is indicated by the on the ten-edged Decimeter pointer located on the inner batten a on the one on the outer batten f Centimeter division is effected.

So it is so that the decimeter pointer (calculated from above in Fig. I) indicates the 6th centimeter on the outside batten f and hereby indicates the 6th decimeter. (Fig. I at i - setting - 692 at the crosshairs of the leveling instrument) .

The full meters result here as well as with the well-known roller lath by the fact that the colors white, red, yellow, blue, etc. in wide, oblique directions Ribbons on .the inner lath a is applied one above the other in such a way that the reading a different number of meters is indicated by changing the color. In the present Case would have to remember the measurer that z. B. White - 41 m, Red - 42 m, Denote yellow - 43 m, blue - 44 m, etc.

If the horizontal measuring thread appears in position k for a new point when reading the height (Fig. I), the result is the height number 42.758 m. Because the meter color has remained the same, ie 42 m. The mark z appears on the 7th centimeter , so == decimeter: 7, and with the measuring thread one reads on the outside batten f on the right from 5.8 cm, so the total number of heights is: 42.748 m above sea level. Correspondingly, for the settings 1-_q.6.283 m; m-46.378 m and st - 46423 m.

This saves a calculation. Numbers are printed on the whole bar not available.

Claims (2)

PATENT CLAIMS: i: Adjustable leveling staff with longitudinal slot and rotatable inner lath, characterized in that the top plate located on the foot (g) carries a screw (c), the screw nut (b) of which supports the outer batten (f) and the inner batten (a) and on their surface one by a web (! t) has interrupted circular groove (s) into which groove (s) a bottom on the inner batten (a) attached tang (d) engages. 2. leveling rod according to claim i, characterized characterized in that the inner lath (a) forms a regular decagon in cross section and on their ten side faces spaced i dm apart from one another and closed by face Area bears marks (z) increasing by i cm, the setting of which is based on a centimeter graduation (Fig, i) the outer batten (f) can be read.