Inclination sensitive switch

• US 5,155,308 A
• Filed: 06/24/1991
• Issued: 10/13/1992
• Est. Priority Date: 06/24/1991
• Status: Expired due to Term

• Current Assignee: Honeywell Incorporated (Honeywell International Inc.)
• Original Assignee: Honeywell Incorporated (Honeywell International Inc.)
• Inventors: Blair, Carl D.
• Primary Examiner(s): SCOTT, JAMES R
• Application Number:
  US07/720,134
• Time in Patent Office: 477 Days
• Field of Search: 200/61.45 R, 200/61.45 M, 200/61.52, 200/61.53, 200/85 R, 200/DIG. 29, 337/2
• US Class Current: 200/61.52
• CPC Class Codes: H01H 35/027 the inertia mass activating the switch mechanically, e.g. through a lever

Abstract

An inclination sensitive switch is provided which incorporates a support member that has a device attached to it which can serve as a fulcrum point. A lever is supported by the support member at the fulcrum point in such a way that the lever can operate as a pivotal beam which is rotatable about the fulcrum point. A weight is disposed on the lever and supported by the lever. The weight is moveable along the linear distance of the lever. At least one pair of contacts is provided wherein one conductor of the contacts is attached to the lever and another conductor of the pair of contacts is attached to the support member. Movement of the lever with respect to the support member causes disengagement and engagement of the two conductors. As the support member changes its angular relationship to a reference plane, the angle between the lever and the reference plane is also changed if the angular relationship between the support member and the reference plane reaches a sufficient magnitude. Movement of the lever with respect to a horizontal plane causes a weight to move along the length of the lever and rotate the lever about the fulcrum point under the influence of gravity. This movement about the fulcrum point by the lever moves two conductors into contact with each other and completes a circuit. Movement in the opposite direction about the fulcrum point by the lever causes the conductors to move out of contact with each other.

Claims

1. A tilt switch, comprising:

a support member;

a lever connected in pivotal relation with said support member at a fulcrum;

a weight associated in movable contact relation with aid lever along a generally linear path, in response to the force of gravity, between said fulcrum point and a point of maximum travel of said weight;

a first conductor attached to said lever at a point between said fulcrum and said point of maximum travel;

a second conductor attached to said support member, said first and second conductors being movable into contact with each other in response to movement of said lever in a first arcuate direction relative to said fulcrum, said first and second conductors being movable out of contact with each other in response to movement of said lever in a second arcuate direction relative to said fulcrum.

2. The switch of claim 1, wherein:

said weight is a spherical ball.

3. The switch of claim 1 wherein:

said support member is generally tubular and said lever is disposed within said generally tubular support member.

4. The tilt switch of claim 1, wherein:

said first conductor is attached to said lever at a midpoint between said fulcrum and said point of maximum travel.

5. A switch, comprising:

a support member;

a pivot member connected to said support member at a fulcrum point, said pivot member being rotatable about said fulcrum point;

a weight, said weight being supported by said pivot member, said weight being movable along said pivot member in response to movement of said support member relative to a horizontal plane; and

a pair of conductors, said pair of conductors being movable into electrical communication with each other in response to movement of said pivot member, a first conductor of said pair of conductors being attached to said pivot member between said fulcrum point and a point of maximum travel away from said fulcrum point of said weight, a second conductor of said pair of conductors being attached to said support member, said first and second conductors being equidistant from said fulcrum point.

6. The switch of claim 5, wherein:

said weight is a solid device.

7. The switch of claim 5, wherein:

said weight is a sphere.

8. The switch of claim 5, wherein:

said support member is tubular, said pivot member being disposed within said tubular support member.

9. The switch of claim 5, wherein:

said weight comprises two spheres disposed in rolling association with said pivot member.

10. The switch of claim 5, wherein:

said pivot member is shaped to form a trough and said weight is a sphere disposed in said trough for movement along said pivot member to either side of said fulcrum point in response to changes in angular relation of said support member to said horizontal plane.

11. A switch, comprising:

a support member;

a pivot member connected to said support member at a fulcrum point, said pivot member being rotatable about said fulcrum point;

a weight disposed on said pivot member, said weight being movable in relation to said pivot member between said fulcrum point and a point of maximum travel of said weight away from said fulcrum point, said pivot member being movable about said fulcrum point in response to movement of said weight relative to said pivot member; and

a pair of conductors, each of said pair of conductors being movable into contact with each other in response to rotation of said pivot member about said fulcrum point, a first conductor of said pair of conductors being attached to said pivot member at a point between said fulcrum point and said point of maximum travel, a second conductor of said pair of conductors being attached to said support member, said first and second conductors being generally equidistant from said fulcrum point.

12. The switch of claim 11, wherein:

said weight is a sphere.

13. The switch of claim 11, wherein:

said support member is generally tubular, said pivot member being disposed within said generally tubular support member;

said pivot member is shaped to define a trough; and

said weight is a sphere disposed in rolling association in said trough.