Ball-and-socket switch for detecting and signalling selectable inclination directions of a base plane

• US 5,202,559 A
• Filed: 05/18/1992
• Issued: 04/13/1993
• Est. Priority Date: 05/21/1991
• Status: Expired due to Fees

• Current Assignee: Nokia GmbH (Nokia Corporation)
• Original Assignee: Nokia GmbH (Nokia Corporation)
• Inventors: Durst, Klaus
• Primary Examiner(s): Nelms, David C.
• Assistant Examiner(s): LE, QUE TAN
• Application Number:
  US07/884,769
• Time in Patent Office: 330 Days
• Field of Search: 250/229, 250/221, 250/231.1, 340/709, 340/710, 340/440, 340/443, 341/31, 73/517 R, 73/518, 73/517 B, 200/61.45 R, 200/61.52, 200/DIG. 29
• US Class Current: 250/231.1
• CPC Class Codes: G01C 9/06 Electric or photoelectric indication or reading means
• CPC Class Codes: G01C 9/10 by using rolling bodies , e.g. spheres, cylinders, mercury droplets
• CPC Class Codes: G02B 26/02 for controlling the intensity of light G02B26/004 takes precedence
• CPC Class Codes: H03K 17/968 using opto-electronic devices

Abstract

For the purpose of forming a base bearing position (4), the inside of the bottom portion (10) of the ball-guiding socket housing (1) of a ball-and-socket switch, where this bottom portion defines a base plane, is provided with a pyramid-shaped recess (8) as the base bearing position of the switching ball (3) in a (horizontal) normal (or rest) position of the ball-and-socket switch. The base bearing position is formed by a circular recess in the area of the vertex (9) of the pyramid and defines a particular tilting angle (a) of the switching ball. The light transmission elements (16) and the light reception elements are arranged in light-tight chambers behind the side walls (14) of the internal space (6) of the socket housing, these chambers, for the purposes of light transmission, being connected to the internal space by means of apertures (20) in the side walls (14) terminating in rotation-symmetric recesses that narrow in the direction of the chambers. The recesses are shaped in such a way that, whenever a given inclination position is reached, they will come to form together with the switching ball then bearing against the inner face (28) of the recess, a closed and light-tight channel.

Claims

1. A ball-and-socket switch for signalling selectable inclination directions of a base plane, comprising:

a ball-guiding socket housing containing a base plane and having a pyramid-shaped recess, the pyramid-shaped recess contains a base bearing position for a switching ball that determines a tilting angle thereof, the base plane and the pyramid-shaped recess form a line polygon having corners adjacent final bearing positions of the switching ball that define chosen directions of inclination and constitute switching positions of the ball-and-socket switch, each of the final bearing positions is a circular bearing position having gradually narrowing, rotation-symmetric recess in a side wall of the socket housing that rises from the base plane;

a switching ball mounted for movement within said ball-guiding socket housing between the base bearing position and the final bearing positions, the switching ball being dimensionally sized where each of the rotation-symmetric recesses accommodate less than half of the switching ball and a center point of the switching ball will pass an axis of symmetry of the associated rotation-symmetric recess when the switching ball is about to come into contact with the associated corner of the line polygon; and

light transmission and light reception elements arranged at the final bearing positions of the switching ball as to be covered in a light-tight manner when the switching ball comes to bear against the appropriate final bearing position.

2. A ball-and-socket switch in accordance with claim 1, wherein the rotation-symmetric recesses spherical dome shaped and have a diameter only slightly greater than the diameter of the switching ball.

3. A ball-and-socket switch in accordance with claim 2, further including a cover for the socket housing containing a base plane with a pyramid-shaped recess.

4. A ball-and-socket switch in accordance with claim 3, wherein each of the rotation-symmetric recesses communicates via an aperture with a chamber that is associated solely with that particular recess, the light transmission and light reception elements are arranged in the chambers associated with the recesses at the final bearing positions.

5. A ball-and-socket switch in accordance with claim 1, wherein the rotation-symmetric recesses are conical in shape.

6. A ball-and-socket switch in accordance with claim 5, further including a cover for the socket housing containing a base plane with a pyramid-shaped recess.

7. A ball-and-socket switch in accordance with claim 6, wherein each of the rotation-symmetric recesses communicates via an aperture with a chamber that is associated solely with that particular rotation-symmetric recess, the light transmission and light reception elements are arranged in the chambers associated with the recesses at the final bearing positions.

8. A ball-and-socket switch in accordance with claim 1, further including a cover for the socket housing containing a base plane with a pyramid-shaped recess.

9. A ball-and-socket switch in accordance with claim 1, wherein each of the rotation-symmetric recesses communicates via an aperture with a chamber that is associated solely with that particular rotation-symmetric recess, the light transmission and light reception elements are arranged in the chambers associated with the recesses at the final bearing positions.