Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1976-11-05
1978-12-19
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
1791753A, 324 66, G01R 3102
Patent
active
041307941
ABSTRACT:
The task of identifying the terminals to be interconnected and not interconnected, and whether connection is proper in a complex electrical system, such as at the main distribution frame of a telephone central office, is made possible while the system is in operation under power without adversely affecting its operation of being adversely effected. This is done by connecting the combination of a load impedance and a test voltage source across the test points and measuring the voltage across the load. If the measured voltage exceeds the test voltage, the load impedance is maintained at a high value. If it does not exceed the test voltage, the value of the impedance is reduced for the test. Thus, the test impedance is either greater or lesser than the impedance presented by the telephone system at the test terminals. The test results are interpreted in the view of whether the test terminals should or should not be connected when properly wired.
REFERENCES:
patent: 3594635 (1971-07-01), Minamii et al.
patent: 3699438 (1972-10-01), Webb
patent: 3728616 (1973-04-01), Cheek et al.
patent: 3818329 (1974-06-01), Reaves
patent: 3868566 (1975-02-01), Parsons et al.
patent: 4015200 (1977-03-01), Strandh
Frater Grover A.
Strecker Gerard R.
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