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A simple method for preparing layers of sodium salicylate.
Efficient method for producing fine-grained and uniform layers of sodium salicylate over any desired area
A simple environmental chamber for rotating- beam fatigue testing machines.
Humidity-controlled fatigue testing of metals, using gas-tight sleeve of polyethylene film to provide a chamber on a rotating-beam fatigue machine
A simple balloon technique for measuring the radiation patterns of radio aerials.
Meteorological balloon for measuring radiation patterns of antenna systems at frequencies from 20 mc to 500 mc
Adaptive dynamic response characteristics of the human operator in simple manual control.
Operator adaptation to sudden changes in controlled element gain and polarity based on tracking error and response time
A simple way of demonstrating the phase reversals in the tem sub 10, tem sub 20, tem sub 30 modes of a gas laser source.
Youngs double source experiment used to demonstrate phase reversal for three mode patterns of gas laser source
Carbon arc ignition improved by simple auxiliary circuit
High voltage, low current pulse in series with arc power supply efficiently ignites a carbon arc. The easily and economically produced circuit is useful with arc burners and searchlights and with plasma jets.
Simple control device senses solar position
The amount of solar radiation incident on a specially prepared bimetallic strip is simply and reliably controlled by a light valve. This device is valuable for systems requiring temperature regulation.
Simple optical system used to align spectrograph
Optically fast, portable spectrograph incorporates auxiliary optics in a boresight technique to use the zero order of the grating for visual alignment. This device obtains moderately resolved spectra of a multitude of light sources.
Simple BCD circuit accurately counts to 24
Ripple-through counter with divide-by-24 output pulse is used in digital control clocks to register hours and give a daily output signal. It uses commercially available digital modules that incorporate and/gates with flip-flops.
Simple circuit produces high-speed, fixed duration pulses
Circuit generates an output pulse of fixed width from a variable width input pulse. The circuit consists of a tunnel diode in parallel with an inductance driven by a constant current generator. It is used for pulsed communication equipment design.
Simple circuit reduces transistor switching time
Silicon-Controlled Rectifier /SCR/, gated by a voltage divider, controls the potentiometer in transistorized switching circuits. The SCR acts as a gate to trigger the switching transistor only when the input signal reaches an amplitude that will switch the transistor rapidly.
Simple pulse counting circuit computes sum of squares
Pulse counting circuit with an extra chain of flip-flops, delay lines, and gates computes the sum of the squares of the pulse sequences. A pulse train and the sum of the squares of the pulses are simultaneously completed.
Simple device produces accelerometer calibration pulse
Shock-impulse exciter produces a remote checkout of the amplitude calibration and frequency response of a piezoelectric vibration accelerometer. The exciter employs a bimetal spring to apply a mechanical acceleration pulse of a known amplitude and frequency to the accelerometer.
Simple circuit performs binary addition and subtraction
Ripple adder reduces the number of logic circuits required to preform binary addition and subtraction. The adder uses dual input and delayed output flip-flops in one register. The contents of this register are summed with those of a standard register through conventional AND/gates.
Fatigue- a complex subject - some simple approximations
Cyclic-load method of studying crack propagation and fatigue life in material testing
A simple method for determining the bending moment equation that includes vehicle elastic and sloshing modes and a numerical example
Bending moment of vehicle in terms of control parameters - vehicle elastic and sloshing modes
Urinary ''free'' corticosteroids by a simple clinical method
Chromatography of urine extracts for determination of free corticosteroid