Patent ID: RE38795

Claim:
A method for varying the discernable information produced by a warning device, instructions commensurate with a predetermined number of different human sensory system stimulation patterns being stored in memory at sequentially addressable locations, said method comprising the steps of: generating an address signal which corresponds to the memory location of the instruction commensurate with the active warning pattern; employing the generated address signal to retrieve the instruction commensurate therewith; using the retrieved instruction to control the periodic energization of an energy radiator of a warning device; monitoring the state of an electrical contact, the contact having applied thereto a first normal potential corresponding to a first state and a second potential corresponding to a second state, the second potential being indicative of a desire to vary the warning pattern; measuring the duration of each application of said second potential to the monitored contact; changing the generated address signal when the measured time is less than said first duration, the address signal being either incremented or decremented as a function of whether the measured time has exceeded the first duration to provide a new address signal; employing the new address signal to retrieve a new instruction commensurate therewith; and using the retrieved new instruction to control the periodic energization of the radiator of the warning device.