## Mechanical Drawing for High Schools: A Text with Problem Layouts |

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### Common terms and phrases

angle assembly drawing axes block bolt and nut bottom of space calipers center line circle arcs cone construction corners curve cutting planes cylinder detail drawing Develop surface diameter dimension line distance dividers draftsman draw a horizontal draw an arc draw arcs Draw lines Draw three complete drawn ellipse figure finished front view guide lines hole horizontal line hypotenuse Incandescent Lamps inch inclined isometric drawing layout left edge line of intersection locate machine measure mechanical drawing method necessary number of equal object oblique drawing one-half orthographic projection paper parallel perpendicular pictorial piece plane of projection position Prob problems projecting line record strip revolved scale screw threads shape sheet shown in Fig side views space draw straight line stroke T-square tangent three complete views three views top view triangle triangle matches triangular prism true length vanishing points vertical lines view working drawing

### Popular passages

Page 92 - The circular pitch is the distance from a point on one tooth to the corresponding point on the next tooth, measured along the pitch circle.

Page 49 - Perspective projection is the representation of an object as it actually appears to the observer located at a particular point.

Page 111 - An ellipse is the plane curve generated by a point moving so that the sum of its distances from two fixed points (Fi, F2), called the "focuses," is a constant equal to the long diameter, or major axis AB.

Page 75 - BILGE-STRAINERS. Each pipe leading from the bilges or from the drainage system of the vessel to the pumps will be fitted with a Macomb, or equivalent, strainer, above the floors. The baskets of Macomb strainers will have a diameter equal to one and one-half times the diameter of the pipe, and a length equal to twice the diameter of the pipe.

Page 107 - AB at a and b. With a and b as centers, and any radius greater than < .;. describe arcs intersecting at D.

Page 6 - Hold ruling pen perpendicular to the paper and inclined slightly in the direction in which the line is being drawn.

Page 52 - That is, horizontally aligned dimensions are read from the bottom of the sheet, and vertical dimensions from the right side of the sheet (never from the left).

Page 21 - There are two things which a designer, inventor, or builder must be able to do: first, he must be able to visualize, or to see clearly in his mind's eye, what an object looks like without actually having the object; second, he must be able to describe it so that it could be built. A picture can be made which would 6 — • • • 7 show, just as a photograph would do, the general appearance of the object, but it would not show the exact forms and relations of the parts of the object.

Page 120 - If a line be perpendicular to one of the planes of -projection, its projection on that plane is a point ; for, the projecting lines of all the points coincide with the given line.

Page 23 - Basic isometric sketch of a part. projection the top view is placed directly above the front view, and the right-side view to the right of and facing the front view (Figure 2.8).