Boots – shoes – and leggings
Patent
1979-09-24
1981-12-01
Krass, Errol A.
Boots, shoes, and leggings
235 92T, 364571, G04F 706
Patent
active
043039839
ABSTRACT:
A time duration is measured precisely and with high resolution by making three time measurements as shown in FIG. 5. The time difference t.sub.A between the leading edge of a start signal and the next following leading edge of a constant frequency time base signal is measured. The number "n" of the following leading edges is then counted including the leading edge of the time base signal following a stop signal. The number n is multiplied by the period T.sub.Q of the time signal. The time difference t.sub.E between the leading edge of the stop signal and the next following leading edge of the time base signal is measured. The real time difference .DELTA.t is then calculated as follows .DELTA.t=t.sub.A +n.multidot.T.sub.Q -t.sub.E. A three part real time measurement is performed to correct the calculated result for drift and aging. Calibration measurements are made and the respective calibration factors are used in calculating the final results. The respective circuit arrangement includes a start channel, a stop channel, and the corresponding supporting circuits.
REFERENCES:
patent: 3970828 (1976-07-01), Klein
patent: 4142680 (1979-03-01), Oswald et al.
patent: 4168525 (1979-09-01), Russell
patent: 4186298 (1980-01-01), Kinbara
patent: 4192130 (1980-03-01), Takeuchi
Begley et al., "Precision Timing Systems: Part I, Standard Scales", Instruments and Control Systems-Sep. 1970, pp. 87-89.
Fasse W. G.
Gould D. F.
Krass Errol A.
Mitec-Moderne Industrietechnik GmbH
LandOfFree
Method and apparatus for measuring time does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for measuring time, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measuring time will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1300149