Method and apparatus for automatically desensitizing sensor elem

Details Method and apparatus for automatically desensitizing sensor elem Method and apparatus for automatically desensitizing sensor elem

1995-04-25

1996-03-19

Peng, John K.

Communications: electrical

Condition responsive indicating system

Specific condition

340551, 235384, 235400, G06F 708

Patent

active

055006400

ABSTRACT:
A desensitizer apparatus for desensitizing a security sensor element in a book spine. The apparatus includes a scanner which scans along a surface against which book spines are positioned and which detects sensor elements in the spines to be sure that only one book is positioned against the surface. If only one sensor element is detected, a signal is generated which operates a drive mechanism to move desensitizer magnets close to the surface to deactivate the sensor element in the book.

REFERENCES:
patent: 4141078 (1979-02-01), Bridges, Jr. et al.
patent: 4623877 (1986-11-01), Buckens
patent: 4881061 (1989-11-01), Chambers
patent: 5146204 (1992-09-01), Zhou et al.
patent: 5187354 (1993-02-01), Bengtsson
patent: 5225807 (1993-07-01), Zhou
patent: 5260690 (1993-11-01), Mann
patent: 5288980 (1994-02-01), Patel

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