EAS tag with motion detection facility

• US 5,025,246 A
• Filed: 04/10/1990
• Issued: 06/18/1991
• Est. Priority Date: 04/10/1990
• Status: Expired due to Fees

• Current Assignee: Sensormatic Electronics Corporation (Johnson Controls International plc)
• Original Assignee: Sensormatic Electronics Corporation (Johnson Controls International plc)
• Inventors: Schenkel, Howard M.
• Primary Examiner(s): Swann, III, Glen R.
• Assistant Examiner(s): MULLEN, THOMAS J
• Application Number:
  US07/507,655
• Time in Patent Office: 434 Days
• Field of Search: 340/572, 340/568, 340/693, 340/689, 340/669, 340/309.15, 340/825.65, 33/366, 200/DIG. 29, 200/61.45 R
• US Class Current: 340/572.8
• CPC Class Codes: G08B 13/1436 with motion detection
• CPC Class Codes: G08B 13/22 Electrical actuation

Abstract

An electrical article surveillance (EAS) tag is inclusive of an electrical power source contained with the tag and circuitry powered by the electrical power source and a motion sensor operatively associated with the tag and contained therewith, the motion sensor providing output indication of movement and thereupon effecting loading of the electrical power source by such tag circuitry.

Claims

1. In combination:

(a) an EAS tag inclusive of an electrical power source contained with said tag and circuitry powered by said electrical power source; and

(b) a motion sensor operatively associated with said tag and contained therewith, said motion sensor being connected electrically between said electrical power source and such tag circuitry, said motion sensor comprising

I. first and second housings comprised of electrically conductive material,

II. first and second electrically conductive means movably supported respectively in said first and second housings, and

III. joinder means for interconnection of said first and second housings, said joinder means being comprised of electrically insulative material and defining a passage permitting movement of said first and second electrically conductive means between said first and second housings responsively to orientation of said tag,

said joinder means, said first and second housings and said first and second electrically conductive means being collectively dimensioned to provide for electrical conductivity between said first and second housings upon reorientation of said tag from disposition wherein neither of said first and second electrically conductive means are in registry with said joinder means.

2. The invention claimed in claim 1 wherein said electrically conductive means are constituted by respective spherical members.

3. The invention claimed in claim 1 wherein said first and second housings are constituted by respective cup-shaped metallic housings.

4. The invention claimed in claim 3 wherein said joinder means is configured as a snap ring having an interior circular rib, said cup-shaped metallic housings being retained by said snap ring with said rib thereof abuttingly engaging said housings and electrically insulating said housings from one another.

5. The invention claimed in claim 4 wherein said housings define respective end flanges, said snap ring including circularly spaced locking tab means in retaining relation with said housing flanges.

6. In combination:

(a) an EAS tag inclusive of an electrical power source contained with said tag and circuitry powered by said electrical power source; and

(b) a motion sensor operatively associated with said tag and contained therewith, said motion sensor being connected electrically between said electrical power source and such tag circuitry, said motion sensor comprising

I. first and second elongate housings comprised of electrically conductive materials and having respective first and second lengths along a longitudinal axis common thereto,

II. first and second electrically conductive means movably supported respectively in said first and second housings, and having respective third and fourth lengths along said longitudinal axis, and

III. joinder means for interconnection of said first and second housings, said joinder means being comprised of electrically insulative material, defining a passage permitting movement of said first and second electrically conductive means between said first and second housings responsively to orientation of said motion sensor, said joinder means having a fifth length along said longitudinal axis,

the sum of said third and fourth lengths exceeding both the sum of said first and fifth lengths and the sum of said second and fifth lengths.

7. The invention claimed in claim 6 wherein said electrically conductive means are constituted by respective spherical members.

8. The invention claimed in claim 6 wherein said first and second housings are constituted by respective cup-shaped metallic housings.

9. The invention claimed in claim 8 wherein said joinder means is configured as a snap ring having an interior circular rib, said cup-shaped metallic housings being retained by said snap ring with said rib thereof abuttingly engaging said housings and electrically insulating said housings from one another.

10. The invention claimed in claim 9 wherein said housings define respective end flanges, said snap ring including circularly spaced locking tab means in retaining relation with said housing flanges.

11. In combination:

(a) an EAS tag inclusive of an electrical power source contained with said tag and circuitry powered by said electrical power source; and

(b) a motion sensor operatively associated with said tag and contained therewith, said motion sensor being connected electrically between said electrical power source and such tag circuitry, said motion sensor comprising

I. first and second elongate housings comprised of electrically conductive materials and having respective first and second lengths along a longitudinal axis common thereto,

II. first and second electrically conductive means movably supported respectively in said first and second housings, and having respective lengths substantially equal to said first and second lengths, and

III. joinder means for interconnection of said first and second housings, said joinder means being comprised of electrically insulative material, defining a passage permitting movement of said first and second electrically conductive means between said first and second housings responsively to orientation of said motion sensor, said joinder means having a third length along said longitudinal axis,

the sum of said first and second lengths exceeding both the sum of said first and third lengths and the sum of said second and third lengths

12. The invention claimed in claim 11 wherein said electrically conductive means are constituted by respective spherical members.

13. The invention claimed in claim 11 wherein said first and second housings are constituted by respective cup-shaped metallic housings.

14. The invention claimed in claim 13 wherein said joinder means is configured as a snap ring having an interior circular rib, said cup-shaped metallic housings being retained by said snap ring with said rib thereof abuttingly engaging said housings and electrically insulating said housings from one another.

15. The invention claimed in claim 14 wherein said housings define respective end flanges, said snap ring including circularly spaced locking tab means in retaining relation with said housing flanges.

16. In combination:

(a) an EAS tag inclusive of an electrical power source contained with said tag and circuitry powered by said electrical power source; and

(b) a motion sensor operatively associated with said tag and contained therewith, said motion sensor being connected electrically between said electrical power source and such tag circuitry, said motion sensor comprising

I. first and second housings comprised of electrically conductive material,

II. first and second electrically conductive means movably supported respectively in said first and second housings, and

III. joinder means for interconnection of said first and second housings, said joinder means being comprised of electrically insulative material and defining a passage permitting movement of said first and second electrically conductive means between said first and second housings responsively to orientation of said motion sensor; and

(c) detection circuitry having electrical connection with one of said first and second housings and responsive to said movement of said first and second electrically conductive means to provide output indication of motion of said EAS tag.

17. The invention claimed in claim 16 wherein said EAS tag further includes an electrical power source connected to one of said housings and to active circuitry of said EAS tag, said detection circuitry being operative to effect operational loading of said power supply by said active circuitry on said detection circuitry output indication and to lessen electrical power communication from said power source to said active circuitry in the absence of said detection circuitry output indication.

18. The invention claimed in claim 17 wherein said active circuitry is of CMOS character, said detection circuitry functioning to discontinue supply of clock pulses applied thereto to said active circuitry.

19. The invention claimed in claim 18 wherein said detection circuitry includes detection means connected to one of said housings to selectively generate an output signal indicative of motion of said EAS tag, switch means operative on such detection means output signal generation to conduct clock pulses therethrough to said active circuitry, and timer means advanced by said clock pulses conducted through said switch means.

20. The invention claimed in claim 19 wherein said timer means has a predetermined pulse count capacity and is connected to said detection means to receive said detection means output signal and to thereby be reset to zero count.

21. The invention claimed in claim 20 wherein said timer means is operative to render said switch means inoperative to conduct clock pulses therethrough on counting pulses in excess of said predetermined count capacity thereof.

22. The invention claimed in claim 21 further including latch means connected to said detection means to receive said detection means output signal, said latch means thereupon rendering said switch means operative to conduct said clock pulses therethrough.

23. The invention claimed in claim 22 wherein said latch means is connected to said timer means to receive indication therefrom of said counting of pulses in excess of said predetermined count capacity thereof, said latch means being connected to said switch means to render said switch means inoperative to conduct said clock pulses therethrough upon receiving such excess count indication from said timer means.

24. The invention claimed in claim 23 wherein said detection means comprises an exclusive OR gate having a first input connected to one of said housings.

25. The invention claimed in claim 24 wherein said exclusive OR gate has a second input and further including negator means connected between said first input and said second input.

26. The invention claimed in claim 25 wherein said detection means further includes a capacitor connected to the junction of said negator and said second exclusive OR gate input.

27. The invention claimed in claim 26 further including resistor means connecting said first input of said exclusive OR gate to a terminal of said power supply.