Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1995-08-03
1996-11-26
Donaghue, Larry D.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
39520005, 3408253, 34082572, G06F 1300, G06F 704, H04Q 700
Patent
active
055794858
ABSTRACT:
A remote signal transmitter that is capable of producing a command comprising a signal including a first value and an answer calculated using the first value as an input variable in a transfer function. The transmitter broadcasts the signal to a receiver which receives the first value and the answer. The receiver then performs a second calculation using the first value to produce a second answer. The first answer incident upon the receiver is then compared with the second answer and if a predetermined comparison test is satisfied, the subsequent command is implemented. The preferred embodiment of the present invention includes a means to increment the first value each time the transmitter is utilized. In addition, the receiver includes a screening process in which the second calculation performed by the receiver will not be performed if a previously used first value is received.
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Edgar Lynne
Moore Ronald G.
Ramsey Reno V.
Tousignant Al E.
Donaghue Larry D.
Rinehart Mark H.
Rockwell International Corporation
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