Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
294 words
A method of digitally computing the square of the ratio of a variable measuring frequency fx to a constant base frequency fxo using a constant reference frequency fo in measuring weights on a string-type scale by employing three counter means comprising a measuring counter means, a base time counter means and a control counter means, comprising the steps of simultaneously with the initiating of the counting operation producing a series of electrical pulses Ix with a frequency Fx proportional to the signal frequency fx, feeding this series of pulses to said measuring counting means for a counting period comprising two counting phases, producing a series of electrical reference pulses Io with a frequency Fo proportional to the base frequency fxo, feeding the reference pulses Io in excess of pulses Ix to said control counter means, the first one of such counting phases being started by presetting said base time counter means, during the first counting phase the control counter means being fed with the measuring frequency fx at a forward input thereof and simultaneously with the reference frequency fo at a reverse input thereof, the measuring counter means being fed with the measuring frequency fx and the preset base time counter means being fed with the reference frequency fo, the first counting phase being completed by said base time counter means upon reaching a zero position and a second counting phase being started, during said second counting phase said measuring counter means being fed further with the measuring frequency fx, said control counter means being fed solely with said reFerence frequency fo at said reverse input thereof and completing said second counting phase upon reaching zero position, whereby the contents of said measuring counter means is proportional to the square of the measuring frequency.
Claim 2
Independent Claim
294 words
A method of digitally computing the square of the ratio of a variable measuring frequency fx to a constant base frequency fxo using a constant reference frequency fo in measuring weights on a string-type scale by employing three counter means comprising a measuring counter means, a base time counter means and a control counter means, comprising the steps of simultaneously with the initiating of the counting operation producing a series of electrical pulses Ix with a frequency Fx proportional to the signal frequency fx, feeding this series of pulses to said measuring counting means for a counting period comprising two counting phases, producing a series of electrical reference pulses Io with a frequency Fo proportional to the base frequency fxo, feeding the reference pulses Io in excess of pulses Ix to said control counter means, the first one of such counting phases being started by presetting said base time counter means, during the first counting phase the control counter means being fed with the measuring frequency fx at a forward input thereof and simultaneously with the reference frequency fo at a reverse input thereof, the measuring counter means being fed with the measuring frequency fx and the preset base time counter means being fed with the reference frequency fo, the first counting phase being completed by said base time counter means upon reaching a zero position and a second counting phase being started, during said second counting phase said measuring counter means being fed further with the measuring frequency fx, said control counter means being fed solely with said reFerence frequency fo at said reverse input thereof and completing said second counting phase upon reaching zero position, whereby the contents of said measuring counter means is proportional to the square of the measuring frequency.
Claim 3
Dependent Claim
207 words
The method as claimed in claim 1, wherein said control counting means, the measuring frequency pulse fx after the beginning of the counting is fed to the measuring counter means over a first AND gate and over a second AND gate to an input of said control counter means also having a second input, said reference frequency pulses fo being also fed over a fourth AND gate to the base time counter means, said base time counter means counting from zero up to a predetermined number and thereby setting the period T1 of said first counting phase during which an output signal of said base time counter means is fed into the second and fourth AND gates, said output signal keeping said second and fourth AND gates open during said first phase, said control counter means attaining a count during said first counting phase which during said second counting phase determined by the time period of said control counter means is reduced by said reference frequency pulses fo to zero and, at the end of such time period said first AND gate becomes closed, said first AND gate being kept open till the end of such time period by an output signal of said control counter means.
Claim 4
Dependent Claim
28 words
The method as claimed in claim 2, wherein said measuring frequency fx is fed over said second AND gate to a forward input of said control counter means.
Claim 5
Dependent Claim
28 words
The method as claimed in claim 2, wherein said reference frequency fo is fed over said third AND gate to a reverse input of said control counter means.
Claim 6
Dependent Claim
35 words
The method as claimed in claim 2, wherein said control counter means produces an output signal during the entire counting period TI + T2, said output signal keeping said first and third AND gates open.
Claim 7
Dependent Claim
52 words
The method as claimed in claim 2, wherein for the attaining of defined conditions for the starting of the counting operation, the output signals of said base time counter means and of said control counter means are fed over both inputs of an OR gate to said first and third AND gate.
Claim 8
Dependent Claim
32 words
The method as claimed in claim 1, wherein said reference frequency fo is selected to be equal to such measuring frequency fxo which corresponds to a zero magnitude of the measured unit.