Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1974-11-25
1977-06-14
Rolinec, Rudolph V.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 41, G01V 310, G01R 3302
Patent
active
040300269
ABSTRACT:
A sampling type of metal detector is described in which an oscillator transmits an oscillator signal current through the transmit coil of the detector to produce an electromagnetic field in the region of a search head. A received signal is induced in the receive coil of the detector when a metal object is present within that portion of the electromagnetic field which is external to the search head. A sampling pulse generator produces sampling pulses, at a time related to the output signal of the oscillator, which are transmitted to a sampling circuit for sampling the received signal. In the preferred embodiment, the received signal is sampled at a time controlled by a phase shift adjustment means to produce an output sample voltage such that any indication due to mineral soils or other background conditions is excluded from the sample.
REFERENCES:
patent: 2806992 (1957-09-01), Foerster
patent: 2808723 (1957-10-01), Buntenbach
patent: 3316762 (1967-05-01), Westersten
patent: 3322967 (1967-05-01), Gessner
patent: 3337796 (1967-08-01), Hentschel et al.
patent: 3471772 (1969-10-01), Smith
patent: 3626279 (1971-12-01), Walden
patent: 3707672 (1972-12-01), Miller et al.
patent: 3826973 (1974-07-01), Pflaum
patent: 3836842 (1974-09-01), Zimmermann et al.
patent: 3852663 (1974-12-01), Brooks et al.
Karlsen Ernest F.
Rolinec Rudolph V.
White's Electronics, Inc.
LandOfFree
Sampling metal detector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sampling metal detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sampling metal detector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-12948