Ball-and-socket switch for detecting and signalling selectable i

Details Ball-and-socket switch for detecting and signalling selectable i Ball-and-socket switch for detecting and signalling selectable i

1992-05-18

1993-04-13

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

200 6145R, 73517R, G01D 534

Patent

active

052025594

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.

REFERENCES:
patent: 4450353 (1984-05-01), Sjolund
patent: 4479111 (1984-10-01), Madsen et al.
patent: 5030955 (1991-07-01), Durst et al.
patent: 5136127 (1992-08-01), Blair
Funkschau, No. 17, Aug. 9, 1991, pp. 62-63.

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