A digital data processor adapted to be responsive to an applied signal input (x.sub.n) for generating an output signal indicative of a preselected function of the signal input, and comprising signal sampling memory means adapted to be responsive to an alternate one of the applied input signal and a clocked counter output as a read/write-address for generating a statistical amplitude density function d(x) representing the number of occurrences of an amplitude of a sampled input x. Digital attenua...

The computing module comprises a group of three circuits each intended to perform an elementary operation on the input signals and consisting of a summing circuit for receiving the signals E.sub.1 and E.sub.2 and delivering the sum signal S.sub.1 = E.sub.1 + E.sub.2, a subtracter for receiving the signals E.sub.1 and E.sub.2 and delivering the difference signal S.sub.2 = E.sub.1 - E.sub.2 and a multiplier for receiving the signals E.sub.1 and E.sub.3 and delivering the product signal S.sub.3 = E...

Computing apparatus for producing a digital output equal to ##EQU1## where N.sub.1 is a preset digital factor and V.sub.1 and V.sub.2 are analogue input signals. The apparatus includes a pulse generator arranged to receive in turn each of the signals V.sub.1 and V.sub.2 and to generate pulses at a frequency proportional to the magnitude of the signal, a counter for counting pulses received from the generator, timing means for measuring the time T taken for the count in the counter to reach the v...

A cost computing device for a fuel-dispensing system having a rotary disc with a plurality of light apertures arranged in four light aperture circles and a plurality of output heads for different places respectively of a multiple place unit volume fuel price range--each having a bank of four lamps for the four aperture circles respectively and a photoelectric cell adapted to be selectively operated by the light apertures of each aperture circle when the corresponding lamp is energized to generat...

A five product gasoline dispensing system having a cost counter for accumulating the cost of gasoline dispensed, five banks of price switches for the five gasoline products respectively settable for pre-establishing the amount of each place of the unit volume price for the respective product within a three place price range, a selector for selectively conditioning the system for dispensing each of the gasoline products and for activating the corresponding switch bank for establishing the unit vo...

A computing device for a multiple product gasoline dispensing system having a cost counter for accumulating the cost of gasoline dispensed, a bank of three price decade switches for each gasoline product settable for establishing the amounts of the three places respectively of a three place unit volume price, and a pulse generator for generating a pulse for each one-hundredth of a unit volume of gasoline dispensed. A sequencing circuit is operated by each pulse to sequentially set a binary prede...

An information storage and reproduction apparatus is provided in which information such as picture information is stored on a plurality of record members and selectively scanned to generate images in viewable or monitorable form. In one form of the invention, the information is provided on filmstrip as images and a scanning apparatus therefore is remotely controlled to selectively scan the recordings and generate images on a viewing screen located remote from the record members. In another form ...

A cost-computing device for a fuel-dispensing system having a rotary pulser disc with a plurality of light apertures arranged in four pulser circles, a plurality of output heads, each having a photoelectric pickup, angularly spaced about the axis of the pulser disc for being operated by the light apertures on the pulser disc, and a rotary selector disc associated with each output head having a plurality of light apertures arranged in four selector circles for selectively activating the pulser ci...

A colorimeter with a computing circuit by which the concentration of a sample fluid is linearly indicated. Light transmitted through a sample vial of the fluid is directed upon a photosensing device which provides an electrical signal corresponding to the intensity of a transmitted light. The electrical signal from the photosensing device is applied to a computing circuit which transforms the applied electrical signal into one linearly related to the concentration of the fluid under investigatio...

A mechanical digital computing apparatus has three banks of bistable devices, each device being movable between "0" and "1" positions manually and by the passage thereby of balls on a guide track. A number set up on one of the stores of bistable devices is operated on by a number set up on another store by the passage of balls along the guide track in a manner selected by function selection devices which influence the directions taken by the balls. The result appears on the third bank of bistabl...