Circuit for automatically inverting electrical lines connected to a device upon detection of a miswired condition to allow for operation of device even if miswired
AssigneeIllinois Tool Works Inc.
InventorsPhilip R. Hall, William S. Richie JR.
Life of this patent
Estimating the term…
Abstract
Circuitry is provided in a device to automatically change the relative position of the electrical lines which enter the device upon detection of a miswired condition. More specifically, the circuitry allows the device to function normally even if an installer accidentally inverts (i.e., flips or reverses) the wiring connections when attaching connectors to a communication/power line of the device. In this manner, the installer does not need to rewire the lines.
Claims7
A circuit for changing the relative position of wired electrical lines which are in a fixed relationship to each other, the wired electrical lines including a first communication line and a second communication line, the circuit comprising:
- (a) a first switch associated with the first communication line, the first switch having a first, initial position and a second position which is opposite of the first, initial position;
- (b) a second switch associated with the second communication line, the second switch having a first, initial position and a second position which is opposite of the first, initial position;
- and
- (c) a processor having an output control signal connected to the first and second switches for causing the first and second switches to be placed in their respective first or second position, wherein the first and second communication lines have a first configuration when both are in their first, initial position and a second configuration when both are in their second position.
A circuit according to claim 5 wherein the electrical lines include a flat wire of adjacent electrical lines, and the first and the second communication lines are outer electrical lines of the flat wire and the first and second power lines are inner electrical lines of the flat wire.
Dependencies are inferred from the claim text.