Railway switches and signals – Switches
Reexamination Certificate
2004-09-24
2008-05-13
Le, Mark T. (Department: 3617)
Railway switches and signals
Switches
Reexamination Certificate
active
07370837
ABSTRACT:
A switch machine for a model railroad layout includes a unidirectional motor, a switch actuator coupled to the motor and movable between two switch positions by rotation of the motor, a sensor coupled to the switch actuator for sensing the position of the switch actuator, and a controller connected to the motor and the sensor and having a power input and at least a single wire control input, the controller responsive to a first control signal to activate the motor to move the switch actuator from a first position to a second position at a slow speed simulating an actual railroad switch, and responsive to a second control signal to move the switch actuator from a first position to a second position at a fast speed to avoid a derailment.
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Harter Secrest & Emery LLP
Le Mark T.
Salai Stephen B.
Shaw Brian B.
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