Devices for the measurement of transitory values

Claim 1

A DEVICE FOR THE MEASUREMENT OF A TRANSITORY VALUE AFFECTED BY OSCILLATORY DISTURBANCES OF APPRECIABLE AMPLITUDE AND OF A MEAN FREQUENCY LYING WITHIN A KNOWN FREQUENCY RANGE BUT OF UNCERTAIN PHASE, THE DEVICE COMPRISING IN COMBINATION A PLURALITY OF TRANSDUCERS, FIRST AND SECOND SERIES OF TIMING MECHANISMS, FIRST AND SECOND LOWPASS FILTERS, AN INTEGRATOR AND AN INDICATING INSTRUMENT, THE TRANSDUCERS BEING ARRANGED IN TWO SETS FOR CONVERTING THE TRANSITORY VALUE INTO TWO INITIAL AND IDENTICAL ITEMS OF INFORMATION, EACH SAID ITEM OF INFORMATION BEING FORMED OF A PRINCIPAL SIGNAL ANALOGOUS TO SAID VALUE AND AN INTERFERENCE SIGNAL, THE FIRST SERIES OF TIMING MECHANISMS BEING ARRANGED TO APPLY ONE OF THE SAID ITEMS OF INFORMATION TO THE FIRST LOW-PASS FILTER WHEREIN THE PRINCIPAL SIGNAL IS ATTENUATED SO THAT THE OUTPUT SIGNAL FROM THE SAID FIRST LOW-PASS FILTER IS COMPRISED BY THE INTERFERENCE SIGNAL, MEANS FOR APPLYING THE OUTPUT SIGNAL FROM THE FIRST LOW-PASS FILTER TO THE INTEGRATOR DURING AN INTEGRATION PERIOD EQUAL TO THE PERIOD OF THE INTERFERENCE SIGNAL OF THE MINIMUM PROBABLE FREQUENCY, THE SECOND SERIES OF TIMING MECHANISMS BEING ARRANGED TO APPLY THE OTHER OF THE SAID ITEMS OF INFORMATION TO THE SECOND LOWPASS FILTER AT A LATER INSTANT OF TIME THAN THE TIME AT WHICH THE FIRST SERIES OF TIMING MECHANISMS APPLIES THE SAID ONE ITEM OF INFORMATION TO THE FIRST LOW-PASS FILTER, THE TIME LAG BEING A PERIOD EQUAL TO ABOUT ONE-THIRD OF THE INTEGRATION PERIOD, THE SECOND LOW-PASS FILTER ACTING ON THE SAID OTHER ITEM OF INFORMATION IN A SIMILAR MANNER TO THE ACTION OF THE FIRST LOW-PASS FILTER ON THE SAID ONE ITEM OF INFORMATION, MEANS FOR APPLYING THE OUTPUT FROM THE SECOND LOW-PASS FILTER TO THE INTEGRATOR FOR THE SAID INTEGRATION PERIOD, THE INTEGRATOR BEING ADAPTED TO COMBINE THE TWO SIGNALS DURING THEIR INTEGRATION IN THE SAID INTEGRATION PERIOD AND TO SUPPLY A MEASUREMENT VALUE TO AN INDICATING INSTRUMENT.

Claim 2

A DEVICE FOR THE MEASUREMENT OF A TRANSITORY VALUE AFFECTED BY OSCILLATORY DISTURBANCES OF APPRECIABLE AMPLITUDE AND OF A MEAN FREQUENCY LYING WITHIN A KNOWN FREQUENCY RANGE BUT OF UNCERTAIN PHASE, THE DEVICE COMPRISING IN COMBINATION A PLURALITY OF TRANSDUCERS, FIRST AND SECOND SERIES OF TIMING MECHANISMS, FIRST AND SECOND LOWPASS FILTERS, AN INTEGRATOR AND AN INDICATING INSTRUMENT, THE TRANSDUCERS BEING ARRANGED IN TWO SETS FOR CONVERTING THE TRANSITORY VALUE INTO TWO INITIAL AND IDENTICAL ITEMS OF INFORMATION, EACH SAID ITEM OF INFORMATION BEING FORMED OF A PRINCIPAL SIGNAL ANALOGOUS TO SAID VALUE AND AN INTERFERENCE SIGNAL, THE FIRST SERIES OF TIMING MECHANISMS BEING ARRANGED TO APPLY ONE OF THE SAID ITEMS OF INFORMATION TO THE FIRST LOW-PASS FILTER WHEREIN THE PRINCIPAL SIGNAL IS ATTENUATED SO THAT THE OUTPUT SIGNAL FROM THE SAID FIRST LOW-PASS FILTER IS COMPRISED BY THE INTERFERENCE SIGNAL, MEANS FOR APPLYING THE OUTPUT SIGNAL FROM THE FIRST LOW-PASS FILTER TO THE INTEGRATOR DURING AN INTEGRATION PERIOD EQUAL TO THE PERIOD OF THE INTERFERENCE SIGNAL OF THE MINIMUM PROBABLE FREQUENCY, THE SECOND SERIES OF TIMING MECHANISMS BEING ARRANGED TO APPLY THE OTHER OF THE SAID ITEMS OF INFORMATION TO THE SECOND LOWPASS FILTER AT A LATER INSTANT OF TIME THAN THE TIME AT WHICH THE FIRST SERIES OF TIMING MECHANISMS APPLIES THE SAID ONE ITEM OF INFORMATION TO THE FIRST LOW-PASS FILTER, THE TIME LAG BEING A PERIOD EQUAL TO ABOUT ONE-THIRD OF THE INTEGRATION PERIOD, THE SECOND LOW-PASS FILTER ACTING ON THE SAID OTHER ITEM OF INFORMATION IN A SIMILAR MANNER TO THE ACTION OF THE FIRST LOW-PASS FILTER ON THE SAID ONE ITEM OF INFORMATION, MEANS FOR APPLYING THE OUTPUT FROM THE SECOND LOW-PASS FILTER TO THE INTEGRATOR FOR THE SAID INTEGRATION PERIOD, THE INTEGRATOR BEING ADAPTED TO COMBINE THE TWO SIGNALS DURING THEIR INTEGRATION IN THE SAID INTEGRATION PERIOD AND TO SUPPLY A MEASUREMENT VALUE TO AN INDICATING INSTRUMENT.