Switch having a ball member

Details Switch having a ball member Switch having a ball member

2008-07-22

2008-07-22

Andujar, Leonardo (Department: 2826)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

Reexamination Certificate

active

07402791

ABSTRACT:
A switch includes a housing, an emitter disposed in the housing and having an emitter head to emit a light signal, and a receiver disposed in the housing and having a receiver head to receive the light signal. A receptacle is disposed in the housing, and includes a first wall having a light exit hole aligned with the emitter head, a second wall proximate to the receiver, and a tubular wall cooperating with the first and second walls to define a chamber having a tapered portion that gradually converges from the tubular wall toward the light exit hole. The second wall has a projection projecting into the chamber. The emitter head, the light exit hole, the projection, and the receiver head are aligned with each other along a light path. A ball member is rollable within the chamber.

REFERENCES:
patent: 6392223 (2002-05-01), Hjertman et al.
patent: 6800841 (2004-10-01), Chou

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