Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Nonquantitative
Patent
1976-02-04
1977-08-30
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Nonquantitative
307351, 324103P, 324140D, G01R 1916
Patent
active
040457320
ABSTRACT:
The operative status of an electrical apparatus unit such as a television receiver, incorporating an AC-DC converter, and drawing a substantial amount of current is sensed while differentiating from the usage of a lower amount of current, as when operating in a standby mode. The sensor distinguishes between the standby current waveform and a distinctly different current waveform generated when the AC-DC converter draws current in the mode in which full power is on. The sensor incorporates a reference current detector responsive to the mean of the absolute value of alternating current flowing through a power line to the electrical unit, and a peak value current detector responsive to the peak value of the periodic signal on the power line. A comparator circuit receives outputs from both detectors, and provides an output signal when the ratio therebetween is in excess of a predetermined value, this condition only applying when the AC-DC converter is operative. The comparator may comprise a differential amplifier which periodically triggers a pulse generator to maintain a selected signal level and activate a relay as long as the selected proportionality exists between the peak and mean values of the AC power signal.
REFERENCES:
patent: 2871447 (1959-01-01), Hall
patent: 3434053 (1969-03-01), McKee
patent: 3502983 (1970-03-01), Ingle et al.
patent: 3502993 (1970-03-01), Schurzinger
patent: 3732492 (1973-05-01), Geul
patent: 3777262 (1973-12-01), Vahlstrom et al.
patent: 3777263 (1973-12-01), Perron et al.
patent: 3867702 (1975-02-01), Tropie et al.
patent: 3885168 (1975-05-01), Matsuzaki
Saeki Yoshifumi
Yashiro Kenji
Pioneer Electronic Corporation
Strecker Gerard R.
LandOfFree
Device for sensing the operative status of electrical equipment does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for sensing the operative status of electrical equipment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for sensing the operative status of electrical equipment will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-964432