Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1978-04-25
1980-05-27
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 725, 324133, G01R 3102, G01R 1916, G01R 106
Patent
active
042052645
ABSTRACT:
An electrical testing instrument including a high gain amplifier circuit having a pair of inputs, one comprising a probe and the other covered at least in part by a non-conductive material and being adapted for manual engagement by the user for completing an input circuit through the body of the user. The circuit has a battery and a current-responsive indicator in its output circuit to provide a signal when current flows in the input circuit to provide a critical forward biasing of the amplifier. The battery is connected to furnish such input current when the input terminals are connected in a closed circuit having a resistance of at least approximately the resistance of the user's body. The amplifier circuit is further arranged that when the probe is contacted with a live AC power line and the user engages the portion of the manually engageable input terminal which is covered with a non-conductive material, an operating indicating current will also be present in the output circuit.
REFERENCES:
patent: 2474073 (1949-06-01), Sundt
patent: 2808565 (1957-10-01), Zuti et al.
patent: 3183439 (1965-05-01), Rosinek
patent: 3337801 (1967-08-01), Rinier et al.
patent: 3437928 (1969-04-01), Baker et al.
patent: 3774110 (1973-11-01), Roueti
patent: 3828256 (1974-08-01), Liu
patent: 3878459 (1975-04-01), Hanna
patent: 4006409 (1977-02-01), Adams
patent: 4066953 (1978-01-01), Gold
patent: 4084134 (1978-04-01), Nagano
LandOfFree
High impedance electrical testing instrument for AC and DC volta does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High impedance electrical testing instrument for AC and DC volta, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High impedance electrical testing instrument for AC and DC volta will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1121559