James Ray & Associates
Two state to three state emulator process and apparatus
 Apparatus for implementing two to three state emulator process so two state dump valve can be used in wheel slip correction for braking systems comprising an AND gate which receives a plurality of inputs for generating an output based on value of inputs. An OR gate receives another plurality of inputs for generating another output based on value of inputs. One such input being the output generated by such AND gate. A valve response checking unit receives another plurality of inputs for generating a plurality of outputs. One input is the output generated by such OR gate. Another OR gate receives another plurality of inputs for generating an output based on value of inputs. A lap state determination unit receives another plurality of inputs for generating another plurality of outputs. One input being one of outputs generated by such valve response checking unit and another input being such output generated by such second OR gate. A lap state interrupt processor unit receives another plurality of inputs for generating another plurality of outputs. One input being one of outputs generated by such lap state determination unit and inputs being generated by the valve response checking unit. A lap state simulation unit receives a plurality of inputs for generating another plurality of outputs. One input being generated by such lap state determination unit and one input being generated by such valve response checking unit. One output generated by such lap state simulation unit being representative of a magnet valve state. 
Westinghouse Air Brake Company
B B B
B60T B60T B60T
inventional inventional inventional
Richard J. John W. James A.
Mazur Drake Wood