SU33694A1 - Planner - Google Patents

Description

Instruments for dividing a straight segment into equal parts, made in the form of a triangle made of transparent material with straight lines radiating from one angle, are known in the proposed instrument, the marked lines are replaced by stretched hairs, and for the purpose of determining the difference in point marks and a graduated ruler and a slider are applied to determine contour lines. Mobile yarns are used to mark the ends of the segment, fastened at one end to the hinge, and the other to the sliders.

The device is adapted specifically for interpolating marks when overlaying horizontal contours of a tachometric survey.

The drawing shows a general view of the device.

The proposed device consists of a triangular metal frame 7 with ray-shaped attached on it still thin metal hairs 2 on elastic springs hidden in the lower part of the frame. A movable graduated ruler 3 and a movable slider 4 with a metal rod 5, moving parallel to the ruler along the groove 6, are installed on top of the frame 7, in the lower part of it. Two thickened movable metal are placed between the frame 7 and the ruler 3, above the hairs 2.

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threads 9, attached in the upper part of the frame to the hinge 7, and in the lower part, to the sliders. These threads together with the sliders have a rotational movement in the direction of the arrows.

Suppose that on a straight line AB, between points C and D, which correspond to the marks of 27.3 and 37.8 m, the rounded horizons after 1 meter should be imposed.

With the help of ruler 5, having in the lower part decimal divisions, showing integer and tenths of a meter, and scles with the same divisions on the frame, the difference of marks of 37.8 and 27.3 m is found; To do this, put the slider 4 on the decremented one (7,8-thirds are discarded), aligning the core of the slider 5 with the division of 7,8. Then, moving the ruler 3 to the right, combine division 7.3 (subtracted) with the rod 5 of slider 4. On a scale of Narame, against the left end of the ruler, find the difference of 0.50. Adding the difference between the tens (30 - 20 10), the difference in marks between the points C and 5l is obtained (- that is, 9 full meters, and 1.5 g-derived from the sums of fractional segments at the ends C and D. (28 -27.3) + (37.8 -37) 1.5 m,

Then, setting the ruler zero against one of the hairs on the left side of the frame and taking this hair as the 28th horizontal, counting as 1 meter