| 摘要 |
A loss prevention device for pens includes a pen having an exterior shell generally free of openings therethrough and a writing device housed within the exterior shell and a loss prevention device mounted within the pen which includes a gravity-actuated position sensing switch having an outer electrically conductive cylinder and an inner electrically conductive cylinder mounted within and extending in generally concentric alignment with the outer cylinder, the contact ends of the outer and inner cylinders being generally adjacent to one another such that an electrically conductive ball bearing housed in a generally frustoconical ball bearing chamber can fall into contact with the contact ends of the outer and inner cylinders thereby completing an electrically conductive circuit and initiating an audio-generating programmable electronic device for generating and outputting an audio signal to a loudspeaker when the pen is oriented in a generally horizontal position.
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