Boots – shoes – and leggings
Patent
1990-01-11
1991-11-12
Dixon, Joseph L.
Boots, shoes, and leggings
36442404, 340969, 360 6, G06F 770
Patent
active
050653490
ABSTRACT:
Performance of a helicopter is evaluated with an apparatus including a recorder section and a reader section interconnected during a start-up period while the pilot is initially operating the helicopter. The recorder includes two analog to digital converters connected across temperature and rotor torque sensors of the helicopter. The converters derive digital signals having values representing the amplitudes of analog signals derived by the sensors. The recorder section has a first logic network that couples the digital signals with a data collecting memory. The reader section includes a second logic network, a digital read-out device and manually activated coding wheels for deriving numeric representing digital signals. The first and second logic networks are programmed so that: (a) during the start-up period numeric representing digital signals derived from the coding wheels and corresponding with the values of readings of meters responsive to the sensors are coupled from the reader to the data memory, and (b) during operation of the helicopter, while the reader and recorder are not connected, digital signals from the converters having values commensurate with readings of the meters are supplied to the first logic network. The first logic network responds to the digital signals from the converters to store in the data memory digital values derived from the converters. After operation of the helicopter has been completed, and while the recorder and reader are interconnected, the first and second logic networks are interconnected so that the second logic network supplies to the digital read-out device numerical values commensurate with the relative values of the numeric representing digital signals derived during (a) and the digital signals derived and stored during (b).
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Dixon Joseph L.
Mast-Air Enterprise
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