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Franz Pivoda
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Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms
(AREA)
Calculators And Similar Devices
(AREA)
Abstract
25,313. Pivoda, F. Nov. 14, 1910, [Convention date]. Slide-rules for calculating interest consist of a pair of circular logarithmic scales a, c, parts of which are shown in the Figure, for days and rate of interest, respectively, running oppositely and d having between them a slide b carrying principal and interest. The starting-point of the a and c scales are arranged to lie opposite the same numbers on the principal and interest scales in the slide b respectively. On setting the days opposite the principal, the required interest can be read on the scale on the slide b opposite the given rate of interest on the scale c.
GB191125313D1910-11-141911-11-14Device for Calculating the Interest of a Principal.
ExpiredGB191125313A
(en)