Selectively operated, clock-controlled repetitive calculator
OwnerArthur L. Mostowinventor
Life of this patent
Estimating the term…
Abstract
A portable calculator which performs selected arithmetic computations including addition, subtraction, multiplication and division includes a selectively operative clock circuit. When activated, the clock circuit repetitively performs the preselected mathematical computation at predetermined intervals to obtain a total quantity that is a function of a specific time period.
Claims8
A device for performing multiple repetitive mathematical calculations including in combination:
- a calculator including means to enter a desired number;
- storage means to store a number representing a total, means for displaying said number representing the total, means for combining said entered number with said number representing a total stored in said storage means to develop a new number representing a total, and a clock circuit coupled to said calculator and operative at predetermined intervals to operate said combining means, said clock circuit including an oscillator selectively operative to repetitively develop pulses at a predetermined repetition rate and switch means coupled to said oscillator and said combining means operative in response to each of said pulses to switch and operate said combining means to combine said entered number with said number representing a total to develop a new number representing a new total.
The device of claim 4 wherein said combining means includes a switch, said switch means being coupled to said switch.
In a calculator including means to perform selected mathematical computations and display the quantity obtained by such performance, the improvement comprising;
- a clock circuit selectively operative to repetitively effect said performance by the performing means of said selected mathematical computations at predetermined time intervals and the display of a quantity obtained by such performance per specified time, said selected mathematical computations including addition, subtraction, multiplication, and division.
In a calculator having a keyboard through which selected quantities are entered and mathematical functions are selected, means for performing said mathematical functions, actuatable means for rendering the performing means operative to perform one of the selected functions and means for storing and displaying the entered quantities and computational results obtained by said performance of the performing means;
- the improvement including selectively operable clock means for generating timing pulses, and switch means connecting the clock means to the calculator in bypass relation to the actuatable means for rendering the performing means repetitively operative in response to said pulses to perform said selected functions with respect to a selected quantity initially entered, whereby the cumulative computational results corresponding to the repetitive operation of the performing means are displayed as a function of time.
Dependencies are inferred from the claim text.