SU29979A1 - Angle Measuring Instrument - Google Patents

Description

By means of the proposed instrument, it is intended to achieve the ability to measure incoming angles.

In FIG. 1 and 2 show a protractor with a movable parallelogram in different positions; FIG. 3-moving parallelogram in perspective view; FIG. 4 shows a bar and FIG. 5 - a detail of the device.

The device for measuring angles consists of a protractor (Fig. 1 and 2) representing a semi-circle of metal arc 7, with an outer edge radius of 52 mm and an inner edge of 40 mm. The thickness of the arms 7 of the protractor (Fig. 4) is equal to 1 mm. The handle 7 at the ends of its spa semicircle is on the baseline 2. The scale notch on the protractor is usual from 0 to J8Cf. The numbers of the scale increase from right to left. The protractor base 2 has a length of 104 mm, a width of 6 mm and a thickness of 4 mm. In the basis 2 there are three holes for the axes of fastening the rods: in the center of the basis 2 and at a distance of 20 and 40 mm from this center, to the left. In the center of the baseline on axis 3, a turning bar 5 is reinforced. Marked holes are positioned geometrically exactly along the diameter line of the semicircle of the protractor.

The movable parallelogram is composed of the base 2 of the protractor of the bar 3 and the rod pivotally articulated with it (229)

it is 4, 5, 6, 7 (Fig. 1, 2, 3). The axial bonding points of all these rods paired with a parallelogram are exactly 20 mm apart. At the outer edge of the scale, the bar 3 is expanded and provided with an arrow 10, a cone 9 and a head 8 for movement.

Plank 5 has three holes and two slits: the hole for the main axis on the base 2 of the protractor, the hole for butt with rods # and 6, the slot for entering the rod and and the slit is 13 mm long, at 3-7 mm width, for the reference thread over the protractor squeeze. To avoid the sag of the movable parallelogram and the deformation from this cause of the axial fastening of the bar 3 with the base 2, this bar 3 is provided with the support I of the protractor 7, which is tightly sliding under the limb (Fig. 4).

Rods 4 5 vi 7 have cuts in their middle for passing crutches crossing them. Thanks to this construction, the movement of the middle parts of all the balancing rods is performed in one plane. The cuts in all the rods are made individually in different ways so that the complete addition of the entire parallelogram in two (forward and reverse) directions is possible (Figs. 1, 2, 3). The core has the form of a plate, 42 mm long. The rods 5 and 7 at the ends of the fasteners with the rod 4

have, thrusts, rods entering the slots - #.

At the point of convergence of the rods 4 and 5, directly measuring the incoming angle, there is no hinge, and these crutches remain free, however, at the same time (at any position of the parallelogram) in contact with each other with their ends. The ends of these angle-measuring rods 4 and 5, on their inner side, are cut obliquely to the plane passing through the middle of their axes.

PREDIMATIC AND 3 ABOUT.

A device for measuring angles, characterized in that in the center of the basic ruler 2 of the protractor on the axis U. a pivotally reinforced bar 5, with a common end articulated with rods 4, 5, b, 7, forming a movable parallelogram, which serves to measure the incoming angles, and at the other end the carrier arrow / O for reading the degree value of the measured angle.

.