Elbow Patterns for All Forms of Pipe: A Treatise Upon the Elbow Pattern Explaining the Most Simple and Accurate Methods for Obtaining the Patterns for Elbows in All Forms of Pipe Made from Sheet Metal, with Useful Mathematical Rules and Tables

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Sheet metal publication Company, 1918 - 92 σελίδες
 

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Σελίδα 80 - Approximate Thickness In Fractions of an Inch Approximate Thickness In Decimal Parts of an Inch Weight per Square Foot In Ounces Avoirdupois Weight per Square Foot In Pounds Avoirdupois Number of...
Σελίδα 67 - PERIPHERY of a circle is its entire bounding line ; or it is a curved line, all points of which are equally distant from a point within called the center.
Σελίδα 67 - BOOK II. THE CIRCLE. DEFINITIONS. 127. A Circle is a plane figure bounded by a curve, all points of which are equally distant from a point within called the Centre. The curve which bounds the circle is called the Circumference, and any portion of it is called an Arc.
Σελίδα 73 - F' are two fixed points, and if the point D moves about F in such a manner that the sum of its distances from F and F' is always the same, the point D will describe an ellipse, of which F and F
Σελίδα 75 - ' 1 and b' 1', and their intersection will be a point of the required curve. Other points in the curve of the hyperbola are similarly found, by drawing the intersecting lines n' 2, b' 2' ; n' 3, b
Σελίδα 82 - DECIMAL EQUIVALENTS OF MILLIMETERS AND FRACTIONS OF MILLIMETERS. 1 mm. = .03937 inches. Mm. Inches. Mm. Inches. Mm. Inches. 1-50 = .00079 26-50 = .02047 2 = .07874 2-50 .00157 27-50 .02126 3 .11811 3-50 .00236 28-50 .02205 4 .15748...
Σελίδα 82 - ... some extent, by the mint and the General Post Office. 1047. Linear measure. — The meter is the primary unit of lengths. 10 millimeters (mm) = l centimeter (cm) = 0.3937 inch. 10 centimeters =1 decimeter (dm) =3.937 inches. 10 decimeters = 1 meter (m) = 39.37 inches. 10 meters =1 decameter =393.37 inches. 10 decameters =1 hectometer =328 feet 1 inch. 10 hectometers =1 kilometer (km) =0.62137 mile. 10 kilometers =1 myriameter =6.2137 miles. The meter is used in ordinary measurements; the centimeter,...
Σελίδα 67 - Radius is the length of a straight line drawn from the center to the circumference, as cc or cd, Fig.
Σελίδα 59 - This lap cannot be too small, on the other hand it should not be too large as an increased width adds to the difficulty of assembling the elbow.
Σελίδα 77 - To find the area of an ellipse, multiply the length of the major axis by the length of the minor axis, and this product by .7854.

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