Metric conversion board

Details Metric conversion board Metric conversion board

1978-02-24

1979-05-08

Skogquist, Harland S.

35 1, 73343R, D 7 46, G09B 2900

Patent

active

041528450

ABSTRACT:
An English to metric conversion chart is provided on the face of a wooden board between a pair of spaced parallel grooves extending up and down on the board. A Fahrenheit thermometer is mounted in one of the grooves and a Celsius thermometer is mounted in the other of the grooves. A sheet of transparent plastic covers the face of the board and the grooves.

REFERENCES:
patent: D127809 (1941-06-01), Meehan
patent: D155660 (1949-10-01), Vernon
patent: D239688 (1976-04-01), Doman
patent: 540272 (1895-06-01), Rogers
patent: 797371 (1905-08-01), Raubold
patent: 1556866 (1925-10-01), Mueller
patent: 2148806 (1939-02-01), Voll
patent: 3983277 (1976-09-01), Ackerman
General Electric, 1966 Diary, "Measures and Weights", on pp. 8-9.

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