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"Providing
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DESIGN & BLUEPRINTING HANDBOOK, Volume 1 |
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GLOSSARY
0-9
A B
C D E
F G H
I J K L
M N O
P Q R
S T U
V W X
Y Z
Click
on a letter to browse through the Glossary terms.
To download a printable version of the entire
Glossary, click here.
TERMS
OF USE: This is copyrighted material.
You may not reproduce any text on this page in any format
without written permission from the publisher.
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Decimal
Inches. A unit of measurement whereby an inch is divided
into tenths rather than sixteenths. 1/2 inch would therefore
be 5/10 of a decimal inch. Decimal inches are a convenient measuring
system when you need to use a calculator to find measurements.
In contrast, fractions must be converted into a decimal equivalent
before punching the numbers into a calculator.
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Degrees.
The basic unit of measurement for angles. A circle is divided
into 360 degrees. An alternative to the degree is a unit known
as a radian. The radian is
often used in mathematical formulas for calculating the length
of an arc, in trigonometry, and
for certain values pertaining to circles. As a result, it may
sometimes be necessary to convert from degrees to radians and
vice versa when using these formulas. See also Radians.
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Derived.
Deduced or calculated from available information. As an example,
if you know the overall length of an object and also the length
from one end to a certain feature, you can derive the measurement
for the distance between the same feature and the opposite end
of the object.
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Design
drawings. Blueprints
created by industrial designers or craftsmen for constructing
industrial or consumer products. This is a subjective label
that can be applied to any number of different items. For example,
an industrial designer might produce design drawings for a toy
or for a bottle that contains a liquid product. A craftsman
might produce design drawings in order to construct a cabinet
or piece of furniture.
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Develop.
To "unfold" or "unroll" a three-dimensional
object in such a way as to create flat patterns that can then
be used to construct it from sheet material. See also Developments,
Unfold, Unroll.
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Developments.
Flat patterns that, when assembled, will yield a three-dimensional
object. See Develop.
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Diameter.
The distance across a circle, measured from the widest point
on either side. The diameter can be accurately measured by passing
a straight line through the exact center of the circle and extending
either end of the line until it meets the edges of the circle.
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Dimension
Lines. Lines used to indicate the start and end points of
measurements noted in a dimensioned
drawing (i.e. working
drawings). To conform to convention, dimension lines should
be positioned so as not to cause confusion or clutter in a drawing
and should have arrowheads
at both ends.
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Dimension
Numbers. Numbers placed over the center of dimension
lines to denote the values of the measurements being specified.
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Dividing
Line. A line added to a top or side plan
view to mark the location of the widest point along the
hull of a ship or fuselage of an airplane. All cross
section profiles forward of this point will appear in the
front plan view while all cross section profiles aft of this
point will appear in the rear plan view. The dividing line also
helps in the creation of a body plan. See also Body
Plan.
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Dodecahedron.
A three-dimensional geometric shape having 12 faces where each
face is in the shape of a five-sided pentagon.
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Drafting.
The process of creating mechanical drawings of an object in
such a way that measurements can be accurately extracted and/or
interpreted from them.
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0-9
A B
C D
E F G
H I J
K L M
N O P
Q R S
T U V
W X Y Z
Click
on a letter to browse through the Glossary terms.
To download a printable version of the entire
Glossary, click here.
All
written content on this page © 2007 Charles Adams. ALL RIGHTS
RESERVED.
Reproduction, in whole or in part, is prohibited without written
permission from the publisher.
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