Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2000-10-01
2003-02-25
Pyo, Kevin (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C356S071000
Reexamination Certificate
active
06525329
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to surface penetrating object detection and, more specifically, to a multi-sensor module for detecting quantities of United States currency secreted from view within sealed containers or concealed from view by placement in cavities within floors, ceilings, or walls.
The multi-sensor device is a handheld portable device comprised of a housing having electronic circuits for selectively transmitting variable wavelength electromagnetic waves and electronic circuits for receiving electromagnetic waves.
Further said device has electronic storage means for maintaining a database of known responses for a plurality of predetermined electromagnetic wavelengths and a plurality of target materials and known responses for objects contained within or behind said plurality of target materials.
In addition said device has electronic circuits including microprocessor, memory, antenna, filters and power supply for receiving, analyzing, recording and comparing returning electromagnetic waveforms to said database. Said device further having means for generating visual and/or audible signals based on said analytical comparison.
DESCRIPTION OF THE PRIOR ART
There are other currency verification devices. Typical of these is U.S. Pat. No. 4,618,257 issued to Bayne et al. on Oct. 21, 1986.
Another patent was issued to Ishida on Aug. 20, 1985 as U.S. Pat. No. 4,536,709. Another patent was issued to Gorgone on Feb. 24, 1987 as U.S. Pat. No. 4,645,936. Yet another U.S. Pat. No. 4,973,851 was issued to Lee on Nov. 27, 1990. Another U.S. Pat. No. 5,358,088 was issued to Barnes et al. on Oct. 25, 1994 and yet another was issued on May 30, 1995 to Harbaugh as U.S. Pat. No. 5,419,424 and still yet another was issued on Jul. 18, 1995 to Crane et al. as U.S. Pat. No. 5,434,427.
Another patent was issued to Ebstein et al. on Nov. 21, 1995 as U.S. Pat. No. 5,468,971. Yet another U.S. Pat. No. 5,535,871 was issued to Harbaugh on Jul. 16, 1996. Another U.S. Pat. No. 5,761,089 was issued to McInerny on Jun. 2, 1998. Yet another U.S. Pat. No. 5,810,146 was issued to Harbaugh on Sep. 22, 1998 and another U.S. Pat. No. 5,892,239 was issued to Nagase on Apr. 6, 1999.
U.S. Pat. No. 4,618,257
Inventor: Robert T. Bayne et al.
Issued: Oct. 21, 1986
A color sensitive currency verifier operating with a plurality of narrowband light sourced optically coupled to a single broadband photodetector and including means for automatically balancing the color outputs of the various light sources. Color balancing is accomplished just prior to the examination of a specimen bill. The data samples are taken under the control of a microprocessor and used to authenticate the specimen bill both on the basis of pattern and color information stored in memory. Multiple data samples from a single target area are divided to compensate for soiling condition of the bill, and further compensation for condition of the bill is provided by adjusting the conversion scale factor of an A/D converter on the basis of data samples taken from a reference target area on the surface of the specimen bill before test or data samples are taken.
U.S. Pat. No. 4,536,709
Inventor: Tsuyoshi Ishida
Issued: Aug. 20, 1985
The metal detecting device includes first and second coils provided on both sides of a passageway for paper money. This metal detecting device is designed for use in detecting a metal strip embedded in the paper money in order to determine whether the paper money is genuine or counterfeit. The first coil is connected to a high frequency AC source to generate an AC magnetic field. The second coil is connected to a capacitor to form a resonance circuit which resonates at the same frequency as the AC current. The variation of the Q factor of the resonance circuit due to eddy-current losses produced in the metal strip of the paper money is used by a detecting circuit to determine whether the paper money passing through the space between the first and second coils is genuine.
U.S. Pat. No. 4,645,936
Inventor: Robert L. Gorgone
Issued: Feb. 24, 1987
A detection system for utilization with a paper security or currency validation apparatus wherein a correlation is made between reference patterns and cross hatch lines located in the portrait background on the paper and the preference of one of two paper currencies is determined. Fundamentally the invention consists of a single reticle which contains a lens whereon are located the cross hatch references for two different paper currency denominations. Within the reticle assembly are located two photosensitive cells, one for each reference pattern. Each photosensitive cell is connected to its own authenticating circuitry which validates the presence of a specific paper currency note. Should the tested paper pass the authenticity test of one authenticity circuitry, the other is disabled. Should the tested paper fail both authenticating tests, it is rejected.
U.S. Pat. No. 4,973,851
Inventor: Larry F. Lee
Issued: Nov. 27, 1990
An article of paper currency to be validated is scanned magnetically along the front to obtain a set of magnetic sample values and optically along the back to obtain a set of optical sample data values. Position-shifted versions of the magnetic data values are compared with stored sets of magnetic reference values for various denominations to obtain error figures for each denomination and degree of position shifting tested. A first indication of the denomination of the currency is generated on the basis of the least of the error figures so obtained. Position-shifted and amplitude-shifted versions of the optical data values are similarly compared with stored sets of optical reference values for various denominations to obtain error figures for each denomination and combination of position and amplitude shifting tested. A second indication of the denomination of the currency is generated on the basis of the least of the error figures obtained by this latter method and compared with the first indication. If the two indications of denomination correspond and the least error figures obtained by the two methods fall within predetermined limits, a credit signal is generated indicating a genuine bill of the indicated denomination.
U.S. Pat. No. 5,419,424
Inventor: Steven K. Harbaugh
Issued: May 30, 1995
A currency paper has a security thread embedded therein. The thread comprises a plastic substrate having a plurality of alphanumeric, metallic, electrically-conductive characters formed thereon. The characters have predetermined heights and widths and spacings therebetween. The verification device comprises an oscillator electrode and associated horizontal and vertical electrodes. A time-varying oscillator signal is coupled to the oscillator electrode. The spacing of the horizontal and vertical electrodes in relation to the oscillator electrode is determined by the spacing between the metallized characters on the thread. A valid security thread capacitively couples the oscillator signal into the horizontal electrode but not the vertical electrode. On the other hand, a counterfeit security thread will couple the oscillator signal into both the horizontal and vertical electrodes. Signal processing electronics is provided to sense these valid and counterfeit conditions.
U.S. Pat. No. 5,434,427
Inventor: Timothy T. Crane et al.
Issued: Jul. 18, 1995
A photodiode and a photo transistor are positioned on opposite sides of a document subjected to verification for authenticity under transmitted light. A logic circuit determines the presence or absence of the security feature and correspondingly provides visual or audible indication thereof. The photodiode, photo transistor and related circuitry are arranged with an enclosure that is attached to a currency receiving device such as a cash register. The visual or audible indicators are mounted on the cash register for immediate indication of the currency verification to the cashier. A simplified capacitive proximity sensor can be employed, per se, for inexpensive applications or for redundant verificat
Kroll Michael I.
Pyo Kevin
Sohn Seung C.
LandOfFree
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