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  US4688022A - Safety device for hang glider - Google Patents

  http://www.google.de/patents?id=Z6k6AAAAEBAJ&pg=PA1&zoom=4&dq=hang+gliding+harness

  A safety device to warn the pilot of a hang glider if take-off is attempted without the glider hook-up strap being connected to the pilot's harness includes two sensors arranged in series with an alarm. One of the sensors is arranged to close a…

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  US4776530A - Safety apparatus for hang glider - Google Patents

  http://www.google.de/patents?id=6l42AAAAEBAJ&pg=PA1&zoom=4&dq=hang+gliding+harness

  A safety apparatus for a hang glider that indicates any failure of a pilot to properly hook in a flight harness. The apparatus includes a circuit having a power source, such as a dry cell battery, connected to an alarm through a harness hook in…

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