Registers – Calculators – Input-output calculator to indicator – printer – etc.
Patent
1976-07-06
1978-10-03
Tomsky, Stephen J.
Registers
Calculators
Input-output calculator to indicator, printer, etc.
G06G 114
Patent
active
041179730
ABSTRACT:
This invention relates generally to graphic calculating methods and apparatuses, and in particular to an apparatus by which the values and other factors pertaining to bonds, stocks and other securities may be calculated when certain values and other factors are known.
Heretofore, it has been customary to calculate certain values or factors of bonds and the like, given or knowing other values or factors, by mathematical computation according to certain formulas or by the use of certain tables. These methods have, of course, been accurate and have proved to be satisfactory except that in carrying them out, it has been necessary to do considerable work and up to now they have not incorporated all significant values or factors. The primary object of the present invention is to provide a simple device by the use of which certain values or factors of bonds and the like may be quickly ascertained without mathematical computation and, if they were available, without the use of tables.
REFERENCES:
patent: 2225905 (1940-12-01), Clement
patent: 2300401 (1942-11-01), Basler et al.
patent: 2309675 (1943-02-01), Schlomann et al.
patent: 2666577 (1954-01-01), Parker
patent: 3078036 (1963-02-01), Case
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