SU617299A1

SU617299A1 - Derivator

Info

Publication number: SU617299A1
Application number: SU762427486A
Authority: SU
Inventors: Илья Денисович Похилов
Original assignee: Pokhilov Ilya D
Priority date: 1976-12-06
Filing date: 1976-12-06
Publication date: 1978-07-30

Description

ватор накладывают на чертеж так, чтобы конец визирной линии 6 совпал с точкой 10. При этом визирна лини 11 отражени будет направлена в точку 12 отражени свернутой кривой 13. Затем поворачивают цилиндрический элемент 1 до тех пор, пока точка 12 отражени не совпадет с вершиной изображени кривой 13 на пересечении оптической диаметральной пр мой 8 с линией 7. Линии 6, 7 и И образуют общую пр мую истинного направлени нормали и касательной к дискретной точке 10. В таком положении на графике кривой 9 отмечают точки 0°, 90° и 180°.the guide is placed on the drawing so that the end of the sighting line 6 coincides with point 10. In this case, the sight line 11 of the reflection will be directed to the point 12 of the folded curve 13. Then rotate the cylindrical element 1 until the point 12 of the reflection coincides with the top of the image curve 13 at the intersection of the optical diametrical straight 8 with the line 7. Lines 6, 7 and I form the common straight true direction of the normal and tangent to the discrete point 10. In this position on the graph of curve 9 mark the points 0 °, 90 ° and 180 ° .

Затем дериватор снимают с чертежа и по отмеченным точкам провод т параллельно направлению линии касательную 14 к точке 10, а в направлении линии, проход щей через точку 10 и точку, соответствующую делению 90° транспортирной шкалы,- нормаль через точку 10.The derivator is then removed from the drawing and, at the marked points, the tangent 14 to point 10 is parallel to the line direction, and in the direction of the line passing through point 10 and the point corresponding to the 90 ° division of the transport scale is the normal through point 10.

Claims

Invention Formula

A derivator containing a transparent cylindrical element mounted on a transparent plate, characterized in that, in order to improve the accuracy of constructions, one part of the transparent plate contour is made along the epicycloid within 180 °, and the other part along the semicircle with the center coinciding with the center of the epicycloid, the radius equal to the diameter of the transparent cylindrical element and conjugated with the epicycloid

radial straight, perpendicular to its axis of symmetry, while the cylindrical element has a height equal to its diameter and is installed on the plate with its base so that its geometrical axis

passes through the center of the epicycloid, on the plane of the plate, the sight lines are directed along its axis of symmetry, and on the lateral surface of the cylindrical element are sight lines directed

along its lines intersecting with the target lines of the plate.

Sources of information taken into account in the examination 1. USSR author's certificate

No. 153361, cl. In 43L 11/00, 1961.

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