Patent ID: 6259365
Filing Date: 2001-07-10
Classification: G08B

Abstract:
A laser security fence apparatus for providing a warning signal in response to an intrusion by an intruder of a restricted area, said apparatus comprising:a laser generator for generating a laser beam;a first mirror aligned with said laser beam for reflecting said beam;a second mirror aligned with said first mirror for reflecting said beam reflected by said first mirror;a collector aligned with said second mirror for collecting said beam reflected by said second mirror;a microprocessor associated with said collector and said generator for sensing when said beam is broken by the intruder so that said beam is not received by said collector;an alarm connected to said microprocessor for actuation by said microprocessor when said microprocessor senses that said beam is broken so that said alarm provides the warning signal;said collector including:a collecting lens for collecting said beam;an electronic circuit for generating an electric signal in response to said beam received by said collecting lens;a transmitter for transmitting said electric signal from said microprocessor;said transmitter being a radio transmitter for transmitting a R.F. wave from said microprocessor, said microprocessor being disposed in a vicinity of said collector;a remote receiver for receiving said R.F. wave from said transmitter, said alarm being disposed within said remote receiver;said laser generator including:a 9 volt D.C. source of electrical energy;a laser diode light;a focal lens for focusing said laser beam;said focal lens including:a capacitor for adjusting a sensitivity and intensity of said beam;said capacitor being a variable capacitor;said first mirror being a plane mirror, said first mirror being set angularly relative to said beam;said second mirror being a plane mirror, which is disposed angularly relative to said first mirror;said first and second mirrors being spaced relative to each other so that said beam travelling between said mirrors travels a distance of over 100 yards;said transmitter being a radio transmitter for transmitting a R.F. wave from said microprocessor, said microprocessor being disposed in a vicinity of said collector;said apparatus being a security fence around a swimming pool to provide a warning if a child enters a pool area which would present a potentially life threatening situation for the child if the child were to enter into the pool; andsaid alarm including:a delay device which when actuated, permits an operator to pass without setting off said alarm.