Field monitoring instrument
First Claim
Patent Images
1. A monitoring apparatus comprising:
- a current detector;
a time recorder coupled to the current detector; and
a counter coupled to the current detector.
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Abstract
A monitoring apparatus for use with an electrical appliance to record and display the electrical appliance'"'"'s actual accumulated operating time and record and display the number of times the electrical appliance has been energized since the time the monitoring apparatus was installed or last reset. The monitoring apparatus may include a current detector, a time recorder, and a counter for detecting and recording operation time and number of start-ups.
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Citations
42 Claims
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1. A monitoring apparatus comprising:
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a current detector;
a time recorder coupled to the current detector; and
a counter coupled to the current detector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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29. A monitoring apparatus comprising:
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an electrical appliance;
a power supply for the electrical appliance; and
a monitor electrically connected between the power supply and the electrical appliance for recording hours of operation and number of starts of the electrical appliance. - View Dependent Claims (30, 31, 32, 33, 34)
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35. A method of monitoring electrical appliance run time comprising the steps of:
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running the electrical appliance power current through a monitor; and
recording and the time the appliance is energized on the monitor. - View Dependent Claims (36, 37, 38, 39)
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40. A method of counting the starts of an electrical appliance comprising the steps of:
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running a current of the electrical appliance through a monitor, and incrementing a counter of the monitor by one count each time the monitor detects a change in the current from approximately zero amps to a positive amp value. - View Dependent Claims (41)
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42. The method of 41, wherein a start count number and an appliance run time number are recorded on the monitor and shown on a visual display.
Specification