Foreign exchange ready reckoning chart

Details Foreign exchange ready reckoning chart Foreign exchange ready reckoning chart

1975-12-29

1977-07-12

Chamblee, Hugh R.

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Check, label, or tag

Baggage checks

G09F 1104

Patent

active

040344924

ABSTRACT:
A foreign exchange ready reckoning chart in which an indicator plate and a graduation plate are put together one over the other by means of an eyelet so as to rotate mutually and said indicator plate has windows cut open in sectoral form around said eyelet as a center to correspond respectively to the alternate step of circular graduations, the position of said windows at the upper half of the indicator plate being one step shifted from that of the windows at the lower half of the plate, and said graduation plate has graduations arranged in concentric circles around said eyelet as their center, the graduated figures being alternately in normal standing style and inverted standing style in every other circular step of graduations.

REFERENCES:
patent: 916564 (1909-03-01), Kristofek
patent: 2631391 (1953-03-01), Hanna
patent: 3365818 (1968-01-01), Greiner
patent: 3432942 (1969-03-01), Jack
patent: 3760165 (1973-09-01), Marcks
patent: 3914889 (1975-10-01), Wagner

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