English unit to metric unit conversion device

Details English unit to metric unit conversion device English unit to metric unit conversion device

1976-09-27

1982-06-29

Martin, Jr., William D.

Geometrical instruments

Miscellaneous

Light direction

33476, 33483, G01B 302

Patent

active

043366538

ABSTRACT:
A conversion chart having a transparent base sheet with a first series of divergent solid lines and a second series of divergent broken lines, with the first and second series of lines having a common base line. The first series of divergent lines are spaced along any perpendicular to the base line an integral number of units in an English system of units, such as feet or pounds mass and the broken lines are spaced along any perpendicular to a base line an integral number of corresponding units in a metric system of units, such as meters or Kilograms.

REFERENCES:
patent: 1155059 (1915-09-01), Heathcote
patent: 2300448 (1942-11-01), Ludwig
patent: 2353799 (1944-07-01), Ward
patent: 2547745 (1951-04-01), Cade et al.
patent: 2589525 (1952-03-01), Absher
patent: 3528077 (1970-09-01), Seiden

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