SU30840A1 - Gauge for leveling diameters - Google Patents

Description

The proposed device for leveling diameters consists of two equal lengths connected by a hinge, stakes (legs), one of which has a graduated ruler with a plumb. This ruler carries a vertical ruler, which serves to count the elevations and horizontal distance of the points of the stake ends when the vertical ruler touches the pin fixed on the other of the stakes at a distance equal to the horizontal ruler.

In FIG. 1 shows a general view of the device; FIG. 2, 3 and 4 schemes.

The proposed device (Fig. 1) consists of two identical lengths of stakes A and L, connected by a hinge D. At one of the stakes, the plummet G freely rotates onto the bolt E with the ruler C perpendicularly attached to it with the ruler C on the one hand and the counterweight P on the other hand .

This graduated ruler carries a vertical ruler F, which serves to count the elevations and horizontal distance points of the stakes when the ruler F contacts the pin S. The latter is fixed on the other collar A at a distance equal to the distance from the hinge D to the rotation point C.

(267)

If we take the distance between the stakes L and L equal to /, the length of the stakes 1.8 liter "and the distance from the bolt D to the hinge D equal to 0.36 m, then from the similarity of the triangles L D L and D, D, D (Fig. 2) we get:

JJ, yy d d .a 0.36. 1 П9П l / - 0.20 m.

When the device is tilted (Fig. 3) from a similarity of right-angled triangles L LM, it follows that the distance D K is proportional to the LV distance (the point L exceeds the point L). Thus, if meter divisions are applied on the C and F rulers in the resulting proportional scale, then when the instrument is positioned (Fig. 3), the actual horizontal distance AM will be read on the ruler C, and the elevation point L over the dot L. will be read on the ruler F

In order that the plumb line G can be moved and the legs L at the points D and D are made the same.

The work with the proposed device is performed as follows: holding the pins A and A in their hands, put them along the slope in an arbitrarily moved position (Fig. 4), then holding the device with the left hand, move the ruler F along the ruler C with the right hand until it touches the pin at point D.

The same action calms down the swing of the plumbing G. In the sequel, the leg A is put in place of the legs L, etc.

In view of the insignificant weight of lines C and F compared with a plumb G, the counterweight P can not be moved, having established it initially at the position of the ruler F on the division 1.5 m of the ruler C. With sufficient weight G the counterweight F can be left out.

If you wish to have the same horizontal distance, you can expand the stakes A to A to the extent that the right-handed ruler F does not touch the bar at point D while the desired horizontal distance is indicated on the ruler C. When the slope of the slope reverses, the device rotates near the leg A and the worker switches to the other side (Fig. 4).

The subject matter of the invention.

A device for leveling diameters, characterized in that one of two hinged joints A and A of equal length is equipped with a graduated ruler C with a plumb G, carrying a vertical movable ruler F, which serves to count the elevations and horizontal distance points of the ring ends when the ruler F is touching with pin S fixed on the other of the stakes at a distance equal to the distance from the hinge to the point of rotation of the ruler C.

FIG.

Р .ilf ;; eg.W, i; nfe S; 8 i; fД - gЦi; 1г

FIG. four