Electricity: measuring and testing – Electrical speed measuring – Including 'event' sensing means
Patent
1975-08-04
1976-09-28
Strecker, Gerard R.
Electricity: measuring and testing
Electrical speed measuring
Including 'event' sensing means
324 78D, 324 78J, G04F 800
Patent
active
039834816
ABSTRACT:
In the digital intervalometer disclosed herein, a vernier measurement providing a resolution finer than one clock period is obtained by charging a single capacitor both during the interval between a start signal and a subsequent clock pulse and also during the interval between a clock pulse subsequent to a stop signal and a delayed stop signal. The analog voltage to which the capacitor is charged is converted to a digital value, which digital value is then combined with a clock count accumulated between the stop and start signals to provide a combined digital measurement having a resolution substantially finer than one clock period.
REFERENCES:
patent: 3675127 (1972-07-01), McKiernan
patent: 3713136 (1973-01-01), Nagy
patent: 3728626 (1973-04-01), Douglas
patent: 3731194 (1973-05-01), Favin
Milam Kelly
Nutt Ronald
Williams Charles W.
Cadwallader Ralph L.
Kelly Leo M.
Ortec Incorporated
Strecker Gerard R.
Tokar Michael J.
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