Safety devices
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United States of America Patent
Stats
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Jun 14, 1988
Grant Date -
N/A
app pub date -
May 15, 1987
filing date -
Jul 7, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Hand-held electrical apparatus having an electrical detector in the form of a conductive sensor adjacent to any exposed electrical part so that if the apparatus becomes wet or damp the water will form path of conduction between the exposed electrical part and the sensor. A conductive path from the sensor forming part of the supply lead to the plug, and the plug comprising normally closed mechanical switch at least in the live line from the mains supply to the supply lead to the apparatus and a control circuit connected to the said sensor by the conductive path which open the switch as a result of the conductive path having been formed from the exposed electrical part because of the presence of moisture. The switch comprises a length of wire holding electrical contacts closed against the action of a spring. The control circuit fuse the wire, however, to allow the spring to open the contacts when the conductive path is established. A circuit board is slidably mounted in the plug and carries one of the pair of electrical contacts and the components of the control circuit, the wire holding the circuit board against the action of the spring to keep the mechanical switch in its closed position.
First Claim
Family
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- SIMATELEX MANUFACTORY CO., LTD.
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Kwan, David | Chaiwan, HK | 3 | 131 |
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Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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