Random rhythm-pattern generators have been proposed that can select one of several rhythm-patterns (i.e. pulse trains with different repetition cycles) prepared beforehand, change their playing order, and if necessary change the kind of instrumental musical sounds whenever the beating reaches a predetermined number, in order to produce a random accompaniment rhythm sound. The prior art rhythm-pattern generators played the rhythm-patterns only in a fixed order. Therefore, they had the disadvantag...

A random vibration generator includes a hollow tabletop for supporting equipment to be subjected to vibration, and a sinusoidal reaction-type vibration machine connected to the tabletop to produce a sinusoidal vibration of adjustable frequency and amplitude. The hollow tabletop is horizontally divided into four sections, each containing a number of projectiles such as heavy balls which roll and bounce about within the compartments in the tabletop, impacting with the floor and ceiling of the comp...

A die includes a first, sealed cube having six transparent, window forming faces. A second cube within the first cube has six insignia bearing faces, each in register with and in relatively close proximity to a corresponding face of the first cube. An optical shielding liquid within the container fills the container so that when the die is at rest a transparent bubble is formed between an upper, horizontally disposed insignia bearing face and the container face in registration with the upper fac...

An apparatus having a digital circuit containing a variable-modulus counter and a frequency source for rapidly cycling the variable-modulus counter through all of its states is used to produce a random sample from the set of digits through which the variable-modulus counter is cycling upon the actuation of a pushbutton-controlled sampling circuit. The sample is added to previous samples, if any, and displayed or may be cleared. A modulus selector is used to determine the modulus, or operating ra...

A fuzing device for a submunition or munition comprises an airtight housing ontaining a pressure chamber communicating through an orifice to a diaphragm with a firing pin attached thereto. The fuze is actuated by pressurizing the chamber with gas which flows through the orifice at a predetermined rate until the total pressure on the diaphragm causes it to deform sufficiently to activate a detonator.

A pumping apparatus actuated by waves in a large body of water for pumping water to a remote location. The pumping apparatus is bouyant and comprises a barge structure carrying a compression system having a plurality of pumping units disposed substantially colinearly along the length of the barge structure. The pumping units are actuated by float members which rise and fall responsive to waves in the water body in which the pumping apparatus is disposed. To this end, each of the float members is...

An exemplary embodiment of the present invention provides a source of random width and random spaced rectangular voltage pulses whose mean or average frequency of operation is controllable within prescribed limits of about 10 hertz to 1 megahertz. A pair of thin-film metal resistors are used to provide a differential white noise voltage pulse source. Pulse shaping and amplification circuitry provide relatively short duration pulses of constant amplitude which are applied to anti-bounce logic cir...

A system is provided for sorting binary data records, which includes random access memory means for storing the data records and from which the data records may be retrieved in an ordered sequence. There is no sorting time mode within the system itself, and the system has but two modes of operation, an input mode and an output mode. The time required for sorting the data is dependent only on the rate at which the data records are fed into the system and the rate at which the data records are ret...

A method is provided for the production of homogeneous copolymers from monomers having differing reaction rates; in particular copolymers of acrylonitrile or of vinylidene chloride are disclosed. The monomers are fed to the reaction mixture at a rate sufficient to maintain a constant monomer ratio in the reaction mixture throughout the course of the reaction, the rate of addition being determined by the rate of evolution of heat as measured by the rate that a cooling system removes heat evolved ...

A pseudo-random number generator produces a substantially Gaussian distribution of output numbers from a succession of uniform random numbers. In each cycle uniform random numbers are produced and applied to an adder operative to form cumulative sums. A counter is responsive to carry signals from the adder and the outputs of the adder and counter are combined to form an output pseudo-random number. The number of permitted adding operations is preset.