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US 4,366,373 AGranted
Event rate counter
AssigneeElectro Corporation
InventorWilbur F. Metcalf
Life of this patent
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AssigneeElectro Corporation
InventorWilbur F. Metcalf
Estimating the term…
An event rate counter for measuring the number of events occurring per unit of time with an input pulse train having a fixed number of pulses per each occurrence of the event, wherein the input pulse train is scaled by a multiplier and divider to provide a direct readout in events-per-unit of time. The input pulse train is amplified and applied to a level detector, the output of which is a logic level pulse train having frequency equal to the frequency of the input signal. The pulse train frequency is monitored by a frequency detector for controlling a commutative switch. For low frequency pulse trains, the switch gates the pulse train from the level detector first to the multiplier, the output of which is gated by the switch to the divider. The multiply-divide sequence order is reversed by the switch for high frequency pulse trains thereby extending the dynamic frequency range of the counter.
In an event rate counter for measuring the number of events occurring per unit of time with an input pulse train having a fixed number of pulses per each occurrence of said event and having a frequency related to the frequency of occurrence of said event, said pulse train scaled by a multiplier means and a divider means for providing a direct readout in events-per-unit of time, an improved automatic switching means for determining the sequential order in which the pulse train is applied to the multiplier means and the divider means comprising:
In an event rate counter for measuring the number of events occurring per unit of time with an input pulse train having a fixed number of pulses per each occurrence of said event and having a frequency related to the frequency of occurrence of said event, said pulse train scaled by a multiplier means and a divider means for providing a direct readout in events-per-unit of time, an improved automatic switching means for determining the sequential order in which the pulse train is applied to the multiplier means and the divider means comprising:
In a digital tachometer for measuring the rotational speed on an N tooth gear with an input pulse train derived from said gear having frequency related to gear speed, said pulse train scaled by a multiplier and a divider for providing a direct readout of speed in events-per-unit of time, an improved automatic switching means for determining the sequential order in which multiplication and division are to be performed comprising:
Dependencies are inferred from the claim text.