Scaneze check-in-check-out library workstation

• US 6,783,070 B2
• Filed: 01/02/2001
• Issued: 08/31/2004
• Est. Priority Date: 01/02/2001
• Status: Expired due to Fees

• Current Assignee: Christine A. Reames, Ronald L. Faria
• Original Assignee: Christine A. Reames, Ronald L. Faria
• Inventors: Reames, Christine A., Faria, Ronald L.
• Primary Examiner(s): Lee, Michael G.
• Assistant Examiner(s): RIZKALLAH, KIMBERLY NGUYEN
• Application Number:
  US09/752,236
• Publication Number:
  US 20020084899A1
• Time in Patent Office: 1,337 Days
• Field of Search: 235/462.13, 235/449, 235/450, 340/551, 340/572.1, 340/572.3, 336/118, 336/119, 336/221, 336/234, 234/462.13, 234/449, 234/450
• US Class Current: 235/462.13
• CPC Class Codes: G08B 13/2411 Tag deactivation

Abstract

A device for the sensitization/desensitization of magnetic security strips/EAS markers, the device comprising an electromagnetic transducer that operates alternately on AC/DC power to provide a small zone of electromagnetic flux that will sensitize/desensitize such strips or markers without damage to videos, audios, other equipment and operators.

Claims

1. A device for desensitization or sensitization of magnetic security markers, such as those used on books or videos, comprising:

a) an electromagnetic transducer including a magnet comprised of a core and coil of concentrically wound wire, intensifier blocks forward of the magnet to focus the flux of the magnet, said core being comprised of laminated sheets of transformer steel, and said intensifier blocks being comprised of laminated layers of transformer steel;

b) electronic means to power said electromagnetic transducer with DC or AC current; and

c) switch means to shift the power to the transducer means between AC and DC, such that when said electromagnetic transducer is powered by DC current it will desensitize magnetic security markers that are moved past said transducer, and when said electromagnetic transducer is powered by AC current it will sensitize magnetic security markers that are moved past said electromagnetic transducer;

wherein the core is comprised of 36 sheets of 0.012″

thick 3% rain oriented silicon sulfide transformer steel that are laminated together;

wherein the intensifier blocks are comprised of 32 sheets of 14 mil transformer steel that are laminated together.

2. The device of claim 1, wherein said electromagnetic is comprised of two (2) electromagnetic coils and a core.

3. The device of claim 1, wherein a cross-section of the intensifier blocks is that of a half-trapezoid.

4. The device of claim 1, wherein the electromagnetic transducer produces a flux having a depth of 2 inches, a width equal to the width of the transducer and a flux density no greater than 700 gauss.

5. The method of desensitizing or sensitizing a magnetic security marker attached to books or videos by an electromagnetic transducer workstation comprising the steps of:

a) switching the power to the transducer to direct current;

b) emitting electromagnetic flux in a range of 2 inches or less, and of a maximum flux density of 700 gauss;

c) moving the marker in translational movement by the workstation and the transducer and its emitted flux to desensitize the marker,

d) switching the power to the transducer to alternating current;

e) emitting electromagnetic flux in a range of 2 inches or less and of a maximum 700 gauss;

f) moving the marker in translational movement by the workstation and transducer to sensitize the marker wherein the desensitizing/sensitizing procedure is accomplished without damage to videos because of the short range and low flux/density.

6. An apparatus or workstation for desensitizing or sensitizing electromagnetic markers attached to books or videos comprising:

a) a housing comprised of a base, a cover, and a magnet housing;

b) an electromagnetic transducer secured to the base and the housing in position to emit electromagnetic flux through the wall of the magnetic housing, said electromagnetic transducer including a magnet, that is comprised of a core and two (2) coils of concentrically wound wire, and a pair of intensifier blocks, forward of the magnet, which focus the flux created by the magnet into a small space through said wall;

c) electronic circuitry to power the electromagnetic transducer with direct current or alternating current,

d) switch means to shift the power to the electromagnetic transducer between AC and DC current such that, when said electromagnetic transducer is powered by DC current it will desensitize magnetic security markers that are moved past said housing and said transducer, and when said electromagnetic transducer is powered by AC current, it will sensitize magnetic security markers that are moved past said housing and electromagnetic transducers;

wherein the transducer produces a flux having a depth of 2 inches, width equal to the width of the transducer, and a flux density no greater than 700 gauss, wherein the desensitizing/sensitizing procedure is accomplished without damage to videos because of the short range and low flux density;

wherein the flux that is created by the magnet is focused between the intensifier blocks through the face of the housing into the magnetic security mark which moves translationally across the path of the flux.