Load sensing alarm condition monitor
First Claim
1. A monitoring means for apparatus having a number of functional stations, said means comprising a plurality of sensors located to monitor the operation of at least some of said functional stations, each sensor having a critical condition indicator adjacent the respective station for indicating at least an alarm state and a non-alarm state, a central monitor having a power supply connected via a common connection to each of the sensors and a common signal line connected to the output of each of said sensors wherein each sensor provides an output on activation of the critical condition means activated through said signal line wherin each sensor provides an output signal to said signal line for effecting the alarm means to be activated and wherein said central monitor means includes manually actuable hold switching means coupled via a common control line to each of the sensors for latching the state of each of said condition indicators.
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Abstract
A monitoring means for apparatus having a number of functional stations, said means comprising a plurality of sensors or groups of sensors located to monitor the operation of at least some of said functional stations, each sensor having a critical condition indicator adjacent the respective station, a central monitor having a power supply connected via a common connection to each of the sensors and a common signal line connected to the output of each of said sensors wherein each sensor provides an output on activation of the critical condition indicator, said central monitor having an alarm means activated through said signal line wherein each sensor and/or group of sensors provides an output signal to said signal line characteristic of said sensor or group of sensors to cause the alarm means to be activated in a manner characteristic of said sensor or group of sensors.
46 Citations
13 Claims
- 1. A monitoring means for apparatus having a number of functional stations, said means comprising a plurality of sensors located to monitor the operation of at least some of said functional stations, each sensor having a critical condition indicator adjacent the respective station for indicating at least an alarm state and a non-alarm state, a central monitor having a power supply connected via a common connection to each of the sensors and a common signal line connected to the output of each of said sensors wherein each sensor provides an output on activation of the critical condition means activated through said signal line wherin each sensor provides an output signal to said signal line for effecting the alarm means to be activated and wherein said central monitor means includes manually actuable hold switching means coupled via a common control line to each of the sensors for latching the state of each of said condition indicators.
Specification