How to Make Patent Drawings by Jack Lo & David Pressman

How to Make Patent Drawings by Jack Lo & David Pressman

Author:Jack Lo & David Pressman [Jack Lo and David Pressman]
Language: eng
Format: epub
Publisher: NOLO
Published: 2019-01-15T00:00:00+00:00


Illustration 6.18—Vary Hatching to Distinguish Adjacent Regions

Illustration 6.19—Hatch Angle on Different Areas of Same Part

Illustration 6.20—Thin Versus Thick Hatch Lines

Illustration 6.21—Enlarged View

Inventions With Moving Parts

An invention with moving parts should be shown with the parts positioned in an initial or at-rest condition. Movement of the parts may be shown in several different ways.

Arrow. If the movement of a part is simple, it may simply be indicated by an arrow, such as the rotation of the hinged arm in Illustration 6.22.

Moved part. If it is necessary for comprehension, a part may be drawn in solid lines to show it in its initial position and drawn in phantom lines (dot-dot-dash lines) in the same figure to show it in a moved position. This should be done only if there is no risk of confusion. Illustration 6.23 shows both the original and moved positions of a sleeve on a rod.

Separate figures. The initial position of a part may be shown in solid lines in one figure, and its moved position in solid lines in a separate figure, such as the sleeve and rod in Illustration 6.24. The movement of the part may be indicated by an optional arrow. The separate figures should not be connected.

Long sequence. A complicated invention should be illustrated with a sequence of figures to clearly show the movements and interactions of all the parts in as many distinct steps as necessary. Illustrations 6.25 through 6.32 show the different figures for illustrating a fairly complicated invention—a dual-cycle toilet flusher that provides selectable small- and big-capacity flushes.



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