Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1995-12-11
1997-08-19
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
209549, 250215, 324202, 324226, 324262, G01R 3312, G01R 3500, G08B 2100, G01B 1100
Patent
active
056592477
ABSTRACT:
A metal detection device is disclosed and includes a housing defining a central aperture. An induction member is mounted to the housing and surrounds the aperture for generating an output voltage in response to the presence of a metal object near the induction member. A mechanism is provided for calibrating the induction member by comparing the output voltage to a reference voltage to establish a threshold voltage which is unaffected by transient fluctuations in the output voltage. A mechanism is also provided in the housing and spaced about the aperture for selectively sensing an object passing through the aperture. The sensing mechanism generates a detection signal in response to passage of an object through the aperture only upon activation of the sensing mechanism. A mechanism activates the sensing mechanism upon generation of an inductive member output voltage above the threshold voltage. Finally, a device is provided for triggering an alarm in response to the generation of the detection signal.
REFERENCES:
patent: 4593184 (1986-06-01), Bryce et al.
patent: 4949037 (1990-08-01), Abe
patent: 5001425 (1991-03-01), Beling et al.
patent: 5406259 (1995-04-01), Manneschi
Denver Dynamics, Inc.
Isaac John L.
Strecker Gerard R.
LandOfFree
Device for detecting metal objects passing through an opening 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 detecting metal objects passing through an opening, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for detecting metal objects passing through an opening will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1107391