Compact power detacher

• US 5,535,606 A
• Filed: 09/27/1994
• Issued: 07/16/1996
• Est. Priority Date: 09/27/1994
• Status: Expired due to Term

• Current Assignee: Tyco Fire & Security GmbH (Johnson Controls International plc)
• Original Assignee: Sensormatic Electronics Corporation (Johnson Controls International plc)
• Inventors: Nguyen, Thang T., Drucker, Frank
• Primary Examiner(s): Meyers, Steven N.
• Assistant Examiner(s): BARRETT, SUZANNE LALE DINO
• Application Number:
  US08/313,321
• Time in Patent Office: 658 Days
• Field of Search: 70/57.1, 70/267, 70/268, 70/271, 70/272, 70/273, 70/434, 70/280, 307/139, 307/141, 307/141.4, 340/572, 24/704.1
• US Class Current: 70/57.1
• CPC Class Codes: E05B 73/0017 Anti-theft devices, e.g. tags or monitors, fixed to articles, e.g. clothes, and to be removed at the check-out of shops
• CPC Class Codes: E05B 73/0064 of the mechanical type
• CPC Class Codes: Y10T 70/5004 For antitheft signaling device on protected article

Abstract

Apparatus for detaching an electronic surveillance tag from an article to which it is attached, the tag having a locking member therein and defining an exteriorly accessible passage to the locking member, comprises a motor, a probe rotatable by the motor for movement in the passage into and from unlocking relation with the locking member and drive controller for the motor. The drive controller includes circuitry for (1) establishing a time period for energization of the motor, (2) effecting first sense movement of the probe during a first portion of the time period, (3) discontinuing movement of the probe during a second portion of the time period, and (4) effecting second sense movement of the probe following expiration of the second portion during a third portion of the time period.

Claims

1. In combination:

an electronic surveillance tag and

an apparatus for detaching an electronic surveillance tag from an article to which it is attached, said tag having a locking means therein and defining an exteriorly accessible passage to said locking means, said apparatus comprising;

(a) a motor;

(b) a probe rotatable by said motor for movement in said passage into and from unlocking relation with said locking means; and

(c) drive means for said motor including circuit means for

(1) establishing a time period for energization of said motor,

(2) effecting first sense excitation of said motor and attendant first sense movement of said probe during a first portion of said time period,

(3) discontinuing movement of said probe during a second portion of said time period; and

(4) effecting second sense excitation of said motor and attendant second sense movement of said probe following expiration of said second portion during a third portion of said time period; and

(d) a cover for said apparatus, said cover defining a nest for receipt of said tag; and

said tag resident in said cover nest.

2. The invention claimed in claim 1, wherein said probe is supported for rotational movement.

3. The invention claimed in claim 1, wherein said first portion of said time period corresponds to a time for movement of said probe from a home position thereof to a position thereof for attaining said unlocking relation with said locking means.

4. The invention claimed in claim 3, wherein said second portion of said time period corresponds to a time for removal of said tag from said article.

5. The invention claimed in claim 4, wherein said third portion of said time period corresponds to a time for return of said probe from said position thereof for attaining said unlocking relation with said locking means to said home position.

6. The invention claimed in claim 5, further including stop means located at said home position and at said position at which said probe attains said unlocking relation with said locking means for, said stop means precluding movement of said probe therebeyond.

7. The invention claimed in claim 1, wherein said motor is of a variety including a clutch.

8. The invention claimed in claim 7, further including a gear box receiving input from said motor and imparting movement to said probe.

9. The invention claimed in claim 1, further including a base supporting said motor and said probe, said cover being releasably secured to said base and enclosing said motor and said probe.

10. The invention claimed in claim 1, wherein said circuit means includes activating means for initiating operation of said drive means, said activating means being disposed in registry with said cover nest.

11. The invention claimed in claim 10, wherein said activating means includes a first switch disposed sidewardly adjacent said cover nest and a second switch disposed downwardly of said nest.

12. The invention claimed in claim 10, wherein said circuit means includes a first monostable circuit triggerable by said activating means to define said time period.

13. The invention claimed in claim 12, wherein said circuit means includes a second monostable circuit triggerable by said first monostable circuit to define said first portion of said time period.

14. The invention claimed in claim 12, wherein said circuit means includes a third monostable circuit triggerable by said second monostable circuit to define said second portion of said time period.

15. The invention claimed in claim 14, wherein said circuit means includes a driver circuit receiving input signals from each of said first, second and third monostable circuits.

16. The invention claimed in claim 15, wherein said driver circuit is responsive to the input signals received from said first and second monostable circuit to effect movement of said motor in a first sense during said first portion of said time period.

17. The invention claimed in claim 16, wherein said driver circuit is responsive to the input signal received from said third monostable circuit to brake said motor during said second portion of said time period.

18. The invention claimed in claim 17, wherein said driver circuit is responsive to the input signals received from said first and second monostable circuits following discontinuance of braking of said motor to effect movement of said motor in a second sense during said third portion of said time period.

19. The invention claimed in claim 1, wherein said cover and said base define means adapted for releasable securement of said apparatus to support structure for said apparatus.

20. In combination:

an electronic surveillance tag and

an apparatus for detaching an electronic surveillance tag from an article to which it is attached, said tag having a locking means therein and defining an exteriorly accessible passage to said locking means, said apparatus comprising;

(a) a motor;

(b) a probe rotatable by said motor for movement in said passage into and from a home position to an operative position for unlocking said locking means;

(c) a base supporting said motor and said probe; and

(d) a cover secured to said base and enclosing said motor and said probe, said cover defining a nest for receipt of said tag, said base and said cover jointly defining means for releasably securing said apparatus to support structure for said apparatus; and

said tag resident in said cover nest.

21. The invention claimed in claim 20, wherein said base and said cover jointly define a groove at the exterior of said apparatus as said means for releasably securing said apparatus to support structure for said apparatus.

22. In combination:

an electronic surveillance tag and

an apparatus for detaching an electronic surveillance tag from an article to which it is attached, said tag having a locking means therein and defining an exteriorly accessible passage to said locking means, said apparatus comprising;

(a) a motor;

(b) a probe rotatable by said motor for movement in said passage from a home position to an operative position for unlocking said locking means and for movement from said operative position to said home position;

(c) a base supporting said motor and said probe;

(d) stop means fixedly secured to said base at said home position and at said operative position for precluding movement of said probe therebeyond;

(e) drive means for said motor including circuit means for effecting first sense excitation of said motor and said movement of said probe from said home position to said operative position and for effecting second sense excitation of said motor and said movement of said probe from said operative position to said home position; and

(f) a cover for said apparatus, said cover defining a nest for receipt of said tag; and

said tag resident in said cover nest.

23. The invention claimed in claim 22, further including support means extending upwardly of said base and disposing said probe distal from said base, said stop means and said probe support means being mutually engagable during movement of said probe.