Zircon Corporation

Shandon G Alderson

Larry F Miller

A device providing reverse polarization protection for a battery having both positive and negative terminals disposed at one end of the battery (e.g., a 9 volt &ldquo;transistor radio&rdquo; battery). The device is adapted for insertion between the battery terminals and the spring contacts in a battery housing. The device is made from an electrically insulating material (e.g., plastic), and has at least two openings of unequal size defined through it. The first opening has a diameter larger than that of a negative terminal of the battery, while the second opening has a diameter larger than that of a positive terminal of the battery. The second opening is sized such that the negative terminal of the battery cannot pass through it, thus providing the required mechanical interference for reverse polarity protection. The thickness of the device is less than the height of the battery terminals. The device is capable of moving freely along the axis defined by the length of the battery in conjunction with spring contact compression/decompression, while being retained within the battery housing. Since the device is thereby able to move, or &ldquo;float&rdquo;, the product's spring contacts may be the only compliant components.

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Fremont, CA, United States of America

Shandon G Alderson