Motion sensor and detection system

• US 4,980,575 A
• Filed: 04/10/1990
• Issued: 12/25/1990
• Est. Priority Date: 04/10/1990
• Status: Expired due to Term

• 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): SCOTT, JAMES R
• Application Number:
  US07/507,612
• Time in Patent Office: 259 Days
• Field of Search: 200/61.45 R, 200/61.53, 307/121, 368/184-189
• US Class Current: 307/121
• CPC Class Codes: H01H 35/02 Switches operated by change of position, inclination or orientation of the switch itself in relation to gravitational field tilting mercury container H01H29/20; change of position due to change of liquid level H01H35/18
• CPC Class Codes: Y10S 200/29 Ball

Abstract

A motion sensor comprises first and second housings comprised of electrically conductive material, first and second electrically conductive elements movably supported respectively in the first and second housings, and a joinder member for interconnection of the first and second housings, the joinder member being comprised of electrically insulative material and defining a passage permitting movement of the first and second electrically conductive means between the first and second housings responsively to orientation of the tag. The joinder member, the housings and the first and second electrically conductive elements are collectively dimensioned to provide for electrical conductivity between the first and second housings upon reorientation of the tag from a disposition wherein neither of the first and second electrically conductive elements are in registry with the joinder member. Detection circuitry is associated with the sensor to provide electrical output indication of the sensing of motion of parent structure on which the sensor and detection circuitry are disposed.

Claims

1. A motion sensor comprising:

(a) first and second housings comprised of electrically conductive material;

(b) first and second electrically conductive means movably supported respectively in said first and second housings; and

(c) 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,

said joinder means, said 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 motion sensor from one 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. A motion sensor comprising:

(a) first and second elongate housings comprised of electrically conductive materials and having respective first and second lengths along a longitudinal axis common thereto;

(b) 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

(c) 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. A motion sensor comprising:

(a) first and second elongate housings comprised of electrically conductive materials and having respective first and second lengths along a longitudinal axis common thereto;

(b) 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

(c) 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. Motion sensing and detecting apparatus, comprising:

(a) first and second housings comprised of electrically conductive material;

(b) first and second electrically conductive means movably supported respectively in said first and second housings;

(c) 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

(d) detection circuitry having electrical connection with 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 apparatus.

17. The invention claimed in claim 16 further including parent structure to which said apparatus is affixed, said parent structure including an electrical power source connected to said apparatus and to other circuitry of said parent structure, said apparatus being operative to effect operational loading of said power supply by said other circuitry on said detection circuitry output indication and to lessen electrical power communication from said power source to said other circuitry in the absence of said detection circuitry output indication.

18. The invention claimed in claim 17, wherein said other circuitry is of CMOS character, said detection circuitry functioning to discontinue supply of clock pulses applied thereto to said other 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 apparatus, switch means operative on such detection means output signal generation to conduct clock pulses therethrough to said other 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 0R gate to a terminal of said power supply.