Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1979-07-09
1981-10-27
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 52, 340505, 340651, G01R 3102, G08B 2600
Patent
active
042976332
ABSTRACT:
Electric fences have been used for many years to control the movement of animals but where these fences have spanned large distances it has been very difficult to ensure that the fence is effective at the perimeters of the distance without continual supervision of the fence. The invention relates to a monitor which has one or more responders, preferably located at remote points of the fence which can transmit a return signal to a receiver at a convenient point to indicate the effectiveness of the fence.
REFERENCES:
patent: 2440900 (1948-05-01), Heimke
patent: 2971184 (1961-02-01), Pearson et al.
patent: 3031643 (1962-04-01), Sheftelman
patent: 3496559 (1970-02-01), Brumfield et al.
patent: 3668640 (1972-06-01), Driscoll
patent: 3815093 (1974-06-01), Caretto et al.
patent: 3838419 (1974-09-01), McSorley et al.
patent: 3952294 (1976-04-01), Emerson et al.
McCutchan John C.
Niven Rex C.
Strecker Gerard R.
The University of Melbourne
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