Patent ID: 8847439
Filing Date: 2014-09-30
Classification: H01H

Abstract:
1. A multiple-contact switch, comprising: a sensor to measure a process control parameter, wherein the sensor is a liquid level detector in a liquid tank; a double throw switch having a common terminal, a first throw terminal, and a second throw terminal, the common terminal being coupled to a reference, the double throw switch communicatively coupled to the sensor, the double throw switch to electrically couple the common terminal to one of the first throw terminal or the second throw terminal based on the process control parameter; a first throw circuit coupled to the first throw terminal, the first throw circuit to output a first control signal having a first value to a process control device when the common terminal is substantially in contact with one of the first throw terminal or the second throw terminal; and a second throw circuit coupled to the second throw terminal, the second throw circuit to cause the first throw circuit to output a second control signal having a second value to the process control device when the common terminal is substantially in contact with the other one of the first throw terminal or the second throw terminal, wherein at least one of the first control signal or the second control signal corresponds to the reference, wherein the first and second throw circuits are to maintain the first control signal or the second control signal in response to bouncing by the double throw switch.