Annunciator
First Claim
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1. A shut-down and first-out annunciator device for an internal combustion engine or the like comprising:
- a. a plurality of parallel connected sensor switches which change condition when a fault condition occurs,b. a logic circuit which converts the change in condition on one of the plurality of sensor switches into a binary digital output indicative of the sensor switch which has changed condition and for creating a temporary shut-down signal,c. a digital display means for converting the binary digital signal produced by the logic circuit into a digital readout,d. shut-down means responsive to the temporary shut-down signal for creating continuous signals for latching the digital display and power FET having a control element by application of the signal to said control element,e. a first power supply circuit outputting energy only during normal operation to power the sensor switches, logic means, display means and shut-down means during normal operation, andf. a second power circuit comprising a battery for powering during and after shut-down a portion of the device including the display means and shut-down means but excluding the sensor switches.
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Abstract
A shut-down and first-out annunciator device comprising sensor switches that change condition when a fault occurs. Logic and display circuits provide a digital readout indicative of a fault condition. Shut-down means are responsive to a shut-down signal produced by the logic circuit and produce a latching signal for the display. A first power supply powers all sections during normal operation and a second power supply powers the display and shut-down circuits after shut-down.
17 Citations
12 Claims
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1. A shut-down and first-out annunciator device for an internal combustion engine or the like comprising:
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a. a plurality of parallel connected sensor switches which change condition when a fault condition occurs, b. a logic circuit which converts the change in condition on one of the plurality of sensor switches into a binary digital output indicative of the sensor switch which has changed condition and for creating a temporary shut-down signal, c. a digital display means for converting the binary digital signal produced by the logic circuit into a digital readout, d. shut-down means responsive to the temporary shut-down signal for creating continuous signals for latching the digital display and power FET having a control element by application of the signal to said control element, e. a first power supply circuit outputting energy only during normal operation to power the sensor switches, logic means, display means and shut-down means during normal operation, and f. a second power circuit comprising a battery for powering during and after shut-down a portion of the device including the display means and shut-down means but excluding the sensor switches. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification