SU39447A1 - A device for solving rectangular triangles - Google Patents

Description

The invention relates to a device for solving rectangular triangles consisting of three rulers moving in the articulations, two of which remain mutually perpendicular at all times. Moving the rulers and changing the slope of one of them through the appropriate gears sets the counter's arrow in motion, giving the value of one of the adjacent corners, and also rewinds the tape, on which the trigonometric functions corresponding to this angle are plotted.

In the attached drawing of FIG. 1 is a front view of the instrument; FIG. 2 - side view; FIG. 3 and 4 are the respective vertical sections of the device and FIG. 5, b, 7 - details of the device device.

The device consists of a box 7, on which column 2 is mounted with a scale. Column 3 is moved along column 2, carrying rail 4 with a scale.

On the box 7, the rail 5 is pivotally secured with a scale, along which the holder 6 moves; the latter is pivotally connected to the rake 4.

If some values are set aside in column 2 and rails 4 and 5, they will be the sides of the triangle to be solved. In this case, specifying two of the magnitudes of the sides of the triangle.

all the other elements of it can be obtained on the device and, in addition, the trigonometric functions of the angles obtained. Column 2 is taken as an adjacent leg, rake 4 as the opposite and rake 5 as the hypotenuse.

The specified values are set on column 2 and rail 4 using handle 7, the rotation of which is transmitted through cylindrical gears 8 and 9 of axis W, from which the double bevel gear 77 rigidly mounted on it can be communicated by rotation of bevel gear M and 75 by moving the axis left or right with the button 12 held at the desired positions by the spring 75.

If the button 72 is set in such a way that the double bevel gear 77 is coupled with the bevel gear 74, then a screw 7.5, rigidly connected with it, will come into rotation, which will lead the uterine nut J6, and therefore the clip 5 with the rack 4 in column 2 to the required largest digital value. The upper end of the screw 75 is crowned with a clutch 77, on which a vernier is applied, which determines the size of the adjacent leg with an accuracy of three characters.

If the button 72 is set so that the double bevel gear 77 is engaged with the bevel gear 75, then

The roller 18 will come into rotation, rigidly connected to it. A sprocket J9 (Fig. 5 and b), which is freely moving along it, which is engaged with the comb 20, which is integral with the rail 4, which moves in the guide grooves of the casing 3, is mounted on the pin 18 on the key 18; the size of the opposite leg can also be specified with an accuracy of up to three characters.

On the holder 6, moving on the rail 5, a nonius is also applied for installation with an accuracy of up to three characters. The rail 5 terminates in a toothed sector 2 /, which engages with a double toothed sector 22, and the latter, in turn, with a cylindrical gear 23.

A gear 23, rigidly coupled through axis 24 with gear 25, is informed by the rotation of gear 34, on the hub of which is mounted an arrow 38, indicating on the dial 39 the resulting angle in degrees. At the same time, gear 34, which is integral with gear 33, via pairwise coupled gears 26 and 27, 32 and 3J, 28 and 29, which rotate freely on axles 24 and 35, imparts rotation to gear 30 and, therefore, rigidly associated with it axis 35, at the end of which the arrow 39 is reinforced, marking the angle on the dial scale to the nearest minute. From gear 29 through gear system 36, 37, 38, 39 and 40, the axis 41 is rotated, on which a drum 42 is rigidly mounted, winding a tape 43, passing through the outlet rollers 44 from the drum 45 under the slot 46 of the box 7. On the tape are repeated the values of the angles in degrees and minutes and the values of the trigonometric functions corresponding to these angles are plotted.

The drum 42, winding itself on the tape 43, unwound from the drum 45,

winds the spring 55 through the gear 53 rigidly seated on the axle 56 and then through the gear system 52, 5 /, 50, 49, 48.47 and 54.

When the sides 2, - and 5 of the triangle are set to the zero position, the degree and minute arrows 38 and 39 will also be set to the zero position due to the rigid coupling with the toothed sector 21. Also, the tape 43 will come to its initial position (zero) under the influence of the released spring 55.

The subject matter of the invention.

Claims (2)

1. A device for solving rectangular triangles, characterized by the use of three, pivotally connected, movable and equipped with the corresponding divisions of the rails 2,4 and 5, of which the rails 2 and always remain mutually perpendicular, and the rail 5, corresponding to the hypotenuse of the right triangle, with the purpose of reading one of the corners of the triangle adjacent to it, is connected by a corresponding transfer to the dial pointer 39 corners, as well as to the drum 42, rewinding the tape 43 from the drum 45 with the values of trigonometric khi values, corresponding to the counted angle and visible through the slit 46 at the base of the device. 2. The form of the device according to claim 1, characterized in that the rail 2 is made in the form of a column, inside which the screw / 5 can be rotated by the handle / can be rotated with a nut / 6 running on it, which is connected . is hingedly connected to the slide rail 4, which is movable on the rail 5, which can move in the race J when driven by the same handle / roller S. Fig 5 FIG / (1 FIG. IvU. ; S.j, -:, .... n - f. , : 1;: |: } I GnG-Mr-1 b | 4ir-jb4.ia R-; 0, iM g f ; " / m fig.B FIG. 4 li / i o .17 fc. iiTS eleven ; i IfcwJ T FIG. 7 one jV, -T, i iJs, i-i ,, I-oo,: ii jj-ii-i gy ri - eShYffi, 9-. 1 - .-., - Ue-i -, -, - iL . cCLf:;, i ifP, i SHEG / 4: - .. J; d . .i ::, iS one  j -h) i  "I l C -.- "/;,.: : - ::::: ;; r.JV t t S