Abstract: An improved frequency counter for more reliably reading the frequency of low level signals by employing a method of separating the desired signal from undesirable noise related signals, wherein the frequency counter comprises signal input amplifier circuitry, a frequency modulator circuit for phase shifting the self-oscillation frequency of the undesired signal to isolate it from the valid signal, a prescaler circuit, a frequency or pulse counter driven by the output of the prescaler, and a correlator circuit for differentiating the self-oscillation frequencies from the main signal frequency so as to reduce false correlations between the self-oscillation, or noise, and valid signals.

Abstract: An improved frequency counter for detecting and distinguishing a main input signal from amplifier generated self-oscillating signals, wherein the frequency counter generally includes an input circuit having an amplifier and Schmitt-Trigger, a microprocessor for controlling the main gate to a main counter and user inputs, and a signal level display, all of which communicate with the main counter, a display driver and a frequency display for more accurate frequency measurements.

Abstract: Method and apparatus for clarifying bottled wine by riddling in which the bottles of wine are positioned in generally neck-down inverted position and are subjected to abrupt limited generally vertical force capable of dislodging sediment and solids from adherence to the interior surfaces of the bottles. The apparatus accomplishes the abrupt limited generally vertical force by either lifting and dropping a platform upon which cases of bottles are positioned, or bumping the platform from below. Control means automatically cycles the jouncing action, and supplementary vibratory action, through periods of timed duration and at desired frequencies and amplitudes, the bottles being allowed to remain quiescent for desired periods of time between jouncing actions.