First Principles of Mechanical And Engineering Drawing
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In our eReader you can find the full English version of the book. Read First Principles of Mechanical And Engineering Drawing Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book First Principles of Mechanical And Engineering Drawing
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Then prepare a similar model of the triangle and apply it to the plan of the cube on the line a c. With the sheet of paper on which the plan and elevation of the cube are drawn, fiat on the draw- ing-board, the triangular models will both stand perpendicular to the plane of the paper. If now the VP be bent over forwards on the IL as a hinge until it is at right angles to the HP, the direction of the ray of light with respect to both planes of projection will at once be seen, for the hypothenuse...s of the triangles with which the ray of light coincides are parallel to each other, and make equal angles with the YP and HP. It will also be proven by the aid of the model, that a line drawn in the YP and HP at an angle of 45 with the IL, cor- rectly represents the elevation and plan of a ray of light when making an angle of 35 16" with those planes. 35. We have now to explain why a distinction should be made in the quality of the lines used in inking-in an outline mechanical drawing. It will be readily understood on looking at any illumined object that there are some boundaries in its surfaces on which the light will fall direct, and others on which it will not so fall, but will cause them to cast a shadow on some other surface beyond them.
What to read after First Principles of Mechanical And Engineering Drawing?
You can find similar books in the "Read Also" column, or choose other free books by H Holt Butterfill to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Then prepare a similar model of the triangle and apply it to the plan of the cube on the line a c. With the sheet of paper on which the plan and elevation of the cube are drawn, fiat on the draw- ing-board, the triangular models will both stand perpendicular to the plane of the paper. If now the VP be bent over forwards on the IL as a hinge until it is at right angles to the HP, the direction of the ray of light with respect to both planes of projection will at once be seen, for the hypothenuse...s of the triangles with which the ray of light coincides are parallel to each other, and make equal angles with the YP and HP. It will also be proven by the aid of the model, that a line drawn in the YP and HP at an angle of 45 with the IL, cor- rectly represents the elevation and plan of a ray of light when making an angle of 35 16" with those planes. 35. We have now to explain why a distinction should be made in the quality of the lines used in inking-in an outline mechanical drawing. It will be readily understood on looking at any illumined object that there are some boundaries in its surfaces on which the light will fall direct, and others on which it will not so fall, but will cause them to cast a shadow on some other surface beyond them.
What to read after First Principles of Mechanical And Engineering Drawing?
You can find similar books in the "Read Also" column, or choose other free books by H Holt Butterfill to read onlineMoreLess
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