File:Woodwork and mechanical drawing (1914) (14779655301).jpg

Identifier: woodworkmechanic00foxw (find matches)
Title: Woodwork and mechanical drawing
Year: 1914 (1910s)
Authors: Fox, William Paul. (from old catalog)
Subjects: Woodwork Mechanical drawing
Publisher: Chicago, Ill., Fox brothers
Contributing Library: The Library of Congress
Digitizing Sponsor: Sloan Foundation

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See page 78. 4. In upper right-hand rectangle draw vertical lines ^4apart; use tee square and triangle. 5. In lower left-hand rectangle draw diagonal lines 45° tothe horizontal; use tee square and 45° triangle. 6. In lower right-hand rectangle draw both diagonals andboth diameters. Use light lines. Mark center. 7. Around this center draw a circle 2 in diameter. Usecompass. 8. Within this circle inscribe a square on the diameters.Use a tee square and 45° triangle. 9. Circumscribe a square around this circle. Use tee squareand triangle. 10. Using the center in (7) draw a circle 3 in diameter.Use compass. 11. Circumscribe this circle with a square. Draw in lightlines. Use tee square and triangle. 12. With tee square and 45° triangle draw diagonal linestangent to the circle in (10). The resulting enclosed figure isan octagon. 13. The completed figure consists of: (a) 2 circle with aninscribed and circumscribed square, (b) a3 circle with a cir-cumscribed octagon. See plate 22. — 77-
Text Appearing After Image:
— 78 — EXERCISES PRELIMINARY TO WORKING DRAWINGS LESSON NO. 2To Find Horizontal and Vertical Axes of Projection. 1. Select any rectangular prism no dimension of whichexceeds 4. 2. Secure three pieces of ordinary window glass each 6square. FIG. 157 Isometric drawing of a glass projection box with block in it. See Lesson No. 2,Sections 1, 2, 3, 4, 5, 6, and 7. — 79 — 3. Set these three pieces of glass together with cloth hinges,letting them thus enclose the rectangular prism. 4. Look down from above at the top of the prism. With apiece of chalk trace the lines you see on the glass. 5. From directly in front trace a front view on the glass. 6. From a direct side study trace a side view. 7. With dotted lines extend all these lines towards the glasssides. These dotted lines will intersect similar lines of the threeviews. 8. Remove the prism. Open the glass figure on a suitablesheet of paper. o o -Uj._

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