Registers – Calculators – Tabular
Patent
1976-05-07
1978-10-17
Franklin, Lawrence R.
Registers
Calculators
Tabular
235 70A, G06G 102
Patent
active
041204514
ABSTRACT:
A currency converter formed of a fixed frame having a hollowed-out central area and two flat parallel surfaces wherein one surface defines two large generally parallel windows having a section of one reference line of indicia extending lengthwise across the top and bottom of each window wherein each section designates a range of currency of a reference country in the form of a logarithmic scale of currency values, a first and second small window positioned between the two large windows for displaying in one of the small windows an exchange rate comprising the currency value of the reference country for each unit of currency of a selected country and in the other small window an exchange rate comprising the units of currency of a selected country for each unit of currency of the reference country and with the other surface designing a plurality of apertures formed into at least two columns of spaced aligned apertures extending in a direction substantially perpendicular to the large windows, and a removeable slider positioned within and moveable through the central area having exchange currency indicia designating a range of currency units positioned to be viewed through the two large windows, a second line of indicia designating currency units of the reference country for each unit of currency of the selected country positioned to be viewed through one of the two small windows and on the opposite side thereof in a predetermined position the names of selected countries having units of currency in the range of exchange currency indicia and a listing of the unit of currency of a selected country and a method for using the converter is shown.
REFERENCES:
patent: 3680775 (1972-08-01), Schwarz et al.
patent: 3795795 (1974-03-01), Galbransen
Franklin Lawrence R.
Meaney, Jr. Daniel J.
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