Mechanical Drawing: Instruction Paper, Part 2 |
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Page 51
... axis of the cone , but not cutting the base , the curve formed is called an ellipse , as shown in Fig . 85b , this view being taken per- pendicular to the plane AB . If the FOCUS MAJOR MINOR AXIS FOCUS AXIS plane cuts a cylinder as ...
... axis of the cone , but not cutting the base , the curve formed is called an ellipse , as shown in Fig . 85b , this view being taken per- pendicular to the plane AB . If the FOCUS MAJOR MINOR AXIS FOCUS AXIS plane cuts a cylinder as ...
Page 52
... major axis ; the shortest line is called the minor axis ; and is perpendicular to the major axis at its middle point , called the center . An ellipse may be constructed if the major and minor axes are given or if the foci and one axis ...
... major axis ; the shortest line is called the minor axis ; and is perpendicular to the major axis at its middle point , called the center . An ellipse may be constructed if the major and minor axes are given or if the foci and one axis ...
Page 65
... axes . With C as a center and a radius LP equal to one - half the major axis , draw the arc , cutting the major axis at E and F. These two points are the foci . Now locate several points on P M , such as A , B , and G. With E as a ...
... axes . With C as a center and a radius LP equal to one - half the major axis , draw the arc , cutting the major axis at E and F. These two points are the foci . Now locate several points on P M , such as A , B , and G. With E as a ...
Page 67
... major and minor axes , UV and X Y. Take a slip of paper having a straight edge and mark off C B equal to one - half the major axis , and D B equal to one - half the minor axis . Place the slip of paper in various positions keeping the ...
... major and minor axes , UV and X Y. Take a slip of paper having a straight edge and mark off C B equal to one - half the major axis , and D B equal to one - half the minor axis . Place the slip of paper in various positions keeping the ...
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Common terms and phrases
1½ inches altitude angle equal Angle Fig angle formed arc cutting arc E F arcs intersecting arcs of circles assume the point border lines Central Angle chord circumference conical surface construction lines convenient radius-about cycloid cylinder describe an arc describe arcs describe the arc director circle directrix divide draw arcs draw radii draw the arcs Draw the line Draw the straight ellipse epicycloid equal to one-half equally distant Frustum given circle HERBERT CHANDLER hypocycloid inch describe inch draw inches long inking Plate Inscribed Angle involute isosceles triangle lateral faces line AC major axis MECHANICAL DRAWING middle point minor axis number of equal one-half the major parabola parallel parallelogram parallelopiped perpendicular distance point F points of division points of intersection polyhedron previous plates prism Problem 25 Problems 19 Proof pyramid quadrilateral radius equal regular polygon rhombus right angles sides are equal sphere T-square tangent vertex
Popular passages
Page 50 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.
Page 53 - Cycloid. The cycloid is a curve generated by a point on the circumference of a circle which rolls on a straight line tangent to the circle.
Page 45 - A Circle is a plane figure bounded by a curved line every point of which is equally distant from a point within called the center.
Page 65 - ... as a center, and a radius equal to AM describe short arcs cutting those already drawn as shown at N. With E as a center and a radius equal to LB draw arcs above and below LM as before. With F as a center and a radius equal to BM, draw arcs intersecting those already drawn as shown at O.
Page 67 - O and P, with A. The intersections of the horizontal lines with the oblique lines are points on the curve. For instance, the intersection of AL and the line V is one point and the intersection of AM and the line U is another. The lower part of the curve AD is drawn in the same manner.
Page 42 - Fig. 40, so that the two angles thus formed are equal, the lines are said to be perpendicular to each other and the angles formed are called right angles.
Page 62 - O is equally distant from A, B and C, since it lies in the perpendiculars to the middle points of AB and A C. Hence the circumference will pass through A, B and C. PROBLEM 14. To inscribe a Circle in a given Triangle. Draw the triangle LMN of any convenient size. MN may be made 3^ inches, LM, 2| inches, and LN, 3* inches.
Page 47 - The altitude of a prism is the perpendicular distance between the bases. The area of the lateral faces is called the lateral area.
Page 42 - If one straight line meet another and the angles thus formed are equal they are right angles. When two lines are perpendicular to each other the angles formed are right angles. An acute angle is less than a right angle. An obtuse angle is greater than a right angle. SURFACES. A surface is produced by the motion of a line; it has two dimensions, — length and breadth. A plane figure is a plane bounded on all sides by lines ; the space included within these lines (if they are straight lines) is called...
Page 49 - A cone is a solid bounded by a conical surface and a plane which cuts the conical surface.