Motion sensor switch and circuit for use therewith

• US 4,337,402 A
• Filed: 04/09/1981
• Issued: 06/29/1982
• Est. Priority Date: 04/09/1981
• Status: Expired due to Fees

• Current Assignee: Mattel Incorporated
• Original Assignee: Mattel Incorporated
• Inventors: Nowakowski, Victor A.
• Primary Examiner(s): Gellner, Michael L.
• Application Number:
  US06/254,021
• Time in Patent Office: 446 Days
• Field of Search: 307/121, 200/61.45 R
• US Class Current: 307/121
• CPC Class Codes: H01H 35/14 Switches operated by change of acceleration, e.g. by shock or vibration, inertia switch wherein the liquid constitutes a contact of the switch H01H29/002

Abstract

A motion sensing switch and circuit associated therewith, the switch including a cylindrical non-conductive sleeve housing having circumferentially spaced parallel rib contacts etched on the interior thereof, all the rib contacts being electrically connected together for providing a first switch member with a conductive ball shaped member resiliently suspended in spaced proximate relation to the contact, the conductive member being electrically connected for providing a second switch contact with the electrical circuit providing a pulsed output proportional to the number of rib contacts wiped by the conductive ball during movement of the sensor.

Claims

1. In a switch device for sensing motion, the combination comprising:

a generally non-conductive sleeve housing member having a plurality of circumferentially extending, spaced, generally parallel contact means on the interior thereof, said contact means being positioned generally intermediate the ends of said housing member;

a switch member configured for being loosely received within said housing member;

means for resiliently suspending said switch member within said housing member in spaced proximate relation to said contact means and longitudinally intermediate the first and last of said contact means, one of said switch member and said suspending means having a peripheral portion configured for engaging said contact means during movement of said switch device and being conductive at least in the area of such engagement; and

means coupled to said contact means and to one of said switch member and said suspending means for providing first and second electrical output leads for said switch device for connection to other electrical circuitry.

2. The combination according to claim 1 wherein said switch member has a generally spherically shaped conductive portion.

3. The combination according to claim 1 wherein said generally parallel contact means includes a plurality of conductive rib contact members.

4. The combination according to claim 1 wherein said sleeve housing member is formed from a generally rectangular conductive sheet having etched thereon an array of generally parallel rib contacts and a common longitudinally extending conductive rib for providing access for an external lead.

5. The combination according to claim 1 wherein said switch member includes a generally ball shaped conductive portion, said device further includes end cap members enclosing the open ends of said housing member, and said suspending means includes spring means coupled to said switch member and to the opposing end caps.

6. The combination according to claim 5 wherein said housing member is formed from a generally rectangular non-conductive sheet having etched thereon generally parallel spaced rib contact means.

7. The combination according to claim 1 wherein said switch member is a generally ball-shaped member and said suspending means includes a conductive spring member encircling said switch member.

8. The combination according to claim 1 wherein said switch member includes a conductive member having a generally ball-shaped portion and diametrically opposed integrally formed projections, and said suspending means includes first and second generally identical spring members having the first ends thereof connected to said projections.

9. The combination according to claim 8 wherein said device further includes end cap means closing the open ends of said housing member, and the second ends of said spring members are connected to said end cap means.

10. In a miniature switch device construction, the combination comprising:

a generally rectangular sheet of generally flexible non-conductive material having etched thereon a plurality of generally parallel spaced conductive rib portions, said sheet being configured for forming a tubular housing member;

first and second generally identical end cap members, each of said end cap members having an annular recess for receiving therein one end of the so-formed housing member;

a switch member configured for being loosely received within said housing member;

means for resiliently suspending said switch member within said housing member in spaced proximate relation to said rib portions and longitudinally intermediate the first and last thereof, one of said switch member and said suspending means having a peripheral portion configured for engaging said rib portions during movement of said switch device and being conductive at least in the area of such engagement; and

means coupled to said rib portions and to one of said switch member and said suspending means for providing electrical output leads for said switch device for connection to electrical circuitry.

11. The combination according to claim 10 wherein said switch member is a generally ball-shaped member and said means for suspending includes spring means engaging said ball-shaped member and said first and second end cap members.

12. The combination according to claim 11 wherein said ball-shaped member is a generally conductive mass having diametrically opposed projections and said spring means include first and second generally identical spring members having the first ends thereof secured to said projections and the other ends thereof secured to said end cap members.

13. The combination according to claim 11 wherein said spring means include a conductive spring member connected between said first and second end cap members with said ball-shaped member generally encircled by the midportion of said spring member.

14. In a motion sensing system, the combination comprising:

a switch device having a generally tubular housing with a plurality of generally parallel circumferentially extending conductive strips on the interior thereof generally intermediate the ends of said tubular housing;

a switch member resiliently suspended within said housing in spaced proximate relation to said contact means, at least a portion thereof being conductive and engaging one or more of said strips during movement of said switch device; and

electronic means coupled to said switch device for generating an output generally proportional to the motion of said switch device.

15. The combination according to claim 14 wherein said electronic means includes a semiconductor device.

16. The combination according to claim 15 wherein said electronic means further includes a resistance-capacitance means and a source of voltage for charging the capacitor thereof upon contact closure of said switch device.