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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US3481452


Patent:US 3481452
Title:PICKIOS DRAFTSMAN KIT
Date:01.12.1969
Place:Jamaica (N.Y.)
Country:USA
Person:Anthony G. Pickios
Company:
Internal Links:Fraction of an Inch Adding Machine and FractronCalculator.jpg
Keywords:
Link to the patent office:
(without guarantee)
 US3481452 (espacenet),  US3481452 (uspto)


In order for the draftsman to make convenient and quick conversions of the numerical fractions, such as half inch, quarter inch measurements, etc., to whole numbers, a fractional calculator may also be provided on the lower portion of the frame means