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Automatic fire protection system

  • US 4,428,434 A
  • Filed: 06/19/1981
  • Issued: 01/31/1984
  • Est. Priority Date: 06/19/1981
  • Status: Expired due to Fees
First Claim
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1. An automatic fire protection system for a structure comprising:

  • sprinkler means on said structure, a water supply for said sprinkler means, pump means for pumping water from said water supply to said sprinkler means, power means to operate said pump means, automatic temperature sensors affixed to said structure, anticipating electronic means adapted to initiate the power means in response to any of the following occurrences, a predetermined temperature being sensed by the automatic temperature sensors, a predetermined rapid rise in temperature wherein the rate of change of temperature initiates the power means or a radiant heat reading, a timer function adapted to turn on the pump means, the anticipating means comprising a differentiating amplifier whose output is proportional not only to the level of input but also the rate of change of the input, so that a rapid rise of temperature causes the output of the differentiating amplifier to swing to a level equivalent to one higher than the actual temperature which will initiate the power means if the preselected level is reached.

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