Patent EP0064814A2 successfully refreshed from Google Patents.
EP0064814A2
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EP
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Line voltage monitor system
Assignee: Superior Electric Co
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Filing: 1982-04-08
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Granted: —
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Expires: 2002-04-08
Abstract
Abstract A separate Detector Module (3) and Printer Module (4) are provided. The Printer Module (4) is incorporated in an attache case (5) and has space so that the Detector Module (3) may be carried in the case. A power connection (9) is provided in the case for the Detector Module (3) and a communications connection (10) to the Printer (11) is also provided. The power connection (23) to the Detector is via a separate power cord distinct from the power cord (22) to the Printer. Thus the Detector (3) may be monitoring one power line while the Printer (4) is plugged into another. The plugs (24, 24') on the ends of the power cords to the Printer and to the Detector have both male and female connectors piggy-back (24, 24') so that they may be plugged in to the same power line outlet or the Detector may be plugged in to a power line outlet and the machine to which the power is monitored may be plugged in piggy-back (24, 24') with the detector. The Detector Module (39) derives a synchronization signal from the half-wave crossovers (75) of the AC power line. A half-wave peak detector (65) detects the peak voltage of each half wave. An impulse detector (66) detects the voltage of any impulses occurring during a haft-wave. A common mode detector (67) detects the peak value of each half-wave across the common mode terminals. A microcomputer (38) is provided together with a clock/calendar (61) for recording threshold values and for each half-cycle if a SAG or SURGE is detected; the time that the SAG or SURGE was initiated; the voltage of the half cycle of greatest SAG or SURGE during the event and the number of cycles is recorded. For LO and HI AVERAGE an average resistor stores the average of the peak values for each of the last thirty-two half cycles and that average is compared with the threshold to determine if an event has occurred. If an event has occurred, the duration and the lowest average occurring during the event is stored. The time an impulse occurs is recorded to the nearest second along with the voltage of the peak impulse during the half cycle of the event is stored. For COMMON mode the value of the worst half cycle occurring during any event is recorded along with the number of cycles during which the COMMON mode occurs. BLACKOUT time OFF and time ON are recorded. Except for BLACKOUT, the worst ten of each of the above events are stored and the last ten events that occurred are stored. For BLACKOUT the last five-OFF and five ON events are stored. For each of the above the number of events that have occurred is stored. Other novel features include memory check after battery backup; the method of setting thresholds, monitor ID and the clock/calendar without the use of a full numeric keyboard or an ON LINE display; an event defeat switch (51) on the Detector; a clear event light switch (21) on the Detector; two battery off switches (52. 53) on the Detector to prevent accidental loss of memory; novel IMPULSE and COMMON mode detectors.
Inventors
- 👤 Dennis Michael Borowy
- 👤 Allen Ross Perrins
- 👤 Charles Alan Crotty
- 👤 Peter Senak, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 13:50
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/04; G01R13/06; G01R19/00; G01R19/04; G01R19/165; G01R19/16528
Claims Analysis
Total Claims: 75
Claim 1
Independent Claim
83 words
An alternating current line voltage monitor comprising: A) means for detecting and storing the peak voltage occurring during each half cycle, after filtering out impulses of said AC voltage; B) means for storing said peak half cycle voltage if it is greater than a surge threshold or less than a sag threshold together with the time of occurrence of the first half cycle a threshold was exceeded; and . C) means for storing the duration a threshold was exceeded each consecutive half cycle.
Claim 2
Dependent Claim
83 words
An alternating current line voltage monitor comprising: A) means for detecting and storing the peak voltage occurring during each half cycle, after filtering out impulses of said AC voltage; B) means for storing said peak half cycle voltage if it is greater than a surge threshold or less than a sag threshold together with the time of occurrence of the first half cycle a threshold was exceeded; and . C) means for storing the duration a threshold was exceeded each consecutive half cycle.
Claim 3
Dependent Claim
87 words
An alternating current voltage monitor of Claim 1 and: D) Means for storing the peak voltages occurring during a preset plurality of the immediately preceeding half cycles; E) means for determining the average of the stored peak voltages and storing it, if it is greater than a high average threshold or less than a low average threshold together with the time of occurrence of the first half cycle a threshold was exceeded; and F) means for storing the duration a threshold was exceeded each consecutive half cycle.
Claim 4
Dependent Claim
54 words
The line voltage monitor of Claims 1 or 2, and: F) means for detecting and storing a voltage proportional to the peak voltage of any impulse occurring during each half cycle; and G) means for storing said proportional voltage if it exceeds an impulse threshold together with the time of occurrence of the impulse.
Claim 5
Dependent Claim
61 words
The line voltage monitor of Claim 3, and: H) means for detecting and storing the peak voltage of a common mode voltage occurring during each half cycle; and I) means for storing said peak common mode voltage if it exceeds a common mode threshold together with the time of occurrence of the first half cycle the common mode threshold was exceeded.
Claim 6
Dependent Claim
62 words
The line voltage monitor of Claims 1 or 2, and: H) means for detecting and storing the peak voltage of a common mode voltage occurring during each half cycle; and I) means for storing said peak common mode voltage if it exceeds a common mode threshold together with=the time of occurrence of the first half cycle the common mode threshold was exceed.
Claim 7
Dependent Claim
68 words
The line voltage monitor of Claims 1 or 2, and: J) means for storing at least one worst event of at least one kind of event; and K) means for comparing each new event after termination thereof with said worst events storage means and for storing the new event and if said worst events storage means is full, for deleting from storage the least significant event stored therein.
Claim 8
Dependent Claim
63 words
The line voltage monitor of Claim 3, and: J) means for storing at least one worst event of at least one kind; and K) means for comparing each new event after termination thereof with said worst events storage means and for storing the new event and if said worst events storage means is full,for deleting from storage the least significant event stored therein.
Claim 9
Dependent Claim
63 words
The line voltage monitor of Claim 4, and: J) means for storing at least one worst event of at least one kind; and K) means for comparing each new event after termination thereof with said worst events storage means and for storing the new event and if said worst events storage means is full,for deleting from storage the least significant event stored therein.
Claim 10
Dependent Claim
27 words
The line voltage monitor of Claims 1 or 2, and: L) means for storing a predetermined number of the last occurring events of at least one type.
Claim 11
Dependent Claim
25 words
The line voltage monitor of Claim 3, and: L) means for storing a predetermined number of the last occurring events of at least one type.
Claim 12
Dependent Claim
25 words
The line voltage monitor of Claim 4, and: L) means for storing a predetermined number of the last occurring events of at least one type.
Claim 13
Dependent Claim
26 words
The line voltage monitor of Claim 5, and: L ) means for storing a predetermined number of the last occurring events of at least one type.
Claim 14
Dependent Claim
25 words
The line voltage monitor of Claim 6, and: L) means for storing a predetermined number of the last occurring events of at least one type.
Claim 15
Dependent Claim
25 words
The line voltage monitor of Claim 7, and: L) means for storing a predetermined number of the last occurring events of at least one type.
Claim 16
Dependent Claim
25 words
The line voltage monitor of Claim 8, and: L) means for storing a predetermined number of the last occurring events of at least one type.
Claim 17
Dependent Claim
82 words
A line voltage monitor as defined in Claim 1, further defined in that said means for detecting and storing the peak voltage of each half cycle comprises: a) a low pass filter connected to the monitored line; .b) a full wave rectifier connected to receive the output of said filter and to rectify the same; and c) a sample and hold circuit for receiving the output of said rectifier and for storing a voltage proportional to the peak voltage received by it.
Claim 18
Dependent Claim
31 words
A line voltage monitor as defined in Claim 18, and: M) means for generating a reset signal at the beginning of each half cycle to reset said stored voltage to zero.
Claim 19
Dependent Claim
73 words
An alternating current voltage monitor comprising: A) means for detecting and storing the peak voltage of a common mode voltage occurring during each half cycle; B) means for storing said peak common mode voltage if it is greater than a common mode threshold together with the time of occurrence of the first half cycle the threshold was exceeded; and C) means for storing the duration a threshold was exceeded each consecutive half cycle.
Claim 20
Dependent Claim
73 words
An alternating current voltage monitor comprising: A) means for detecting and storing the peak voltage of a common mode voltage occurring during each half cycle; B) means for storing said peak common mode voltage if it is greater than a common mode threshold together with the time of occurrence of the first half cycle the threshold was exceeded; and C) means for storing the duration a threshold was exceeded each consecutive half cycle.
Claim 21
Dependent Claim
103 words
A line voltage monitor as defined in Claim 3, wherein said means for detecting storing the peak voltage of any impulse comprises: A) a high pass filter connected to a source of line voltage to be monitored and adapted to pass impulses to be monitored; B) a current transformer connected to receive impulses from said filter, and provide a current proportional thereto; C) a sample and hold circuit for receiving said proportional current and storing a voltage proportional to the peak voltage of the biggest impulse received by it; and D) means for deleting the stored voltage from said sample and hold circuit.
Claim 22
Dependent Claim
52 words
A common mode alternating current line voltage monitor comprising: A) means for detecting and storing the peak voltage of a common mode voltage occurring during each half cycle; and B) means for storing said peak common mode voltage if it exceeds a common mode threshold together with the time of occurrence thereof.
Claim 23
Dependent Claim
52 words
A common mode alternating current line voltage monitor comprising: A) means for detecting and storing the peak voltage of a common mode voltage occurring during each half cycle; and B) means for storing said peak common mode voltage if it exceeds a common mode threshold together with the time of occurrence thereof.
Claim 24
Dependent Claim
89 words
A line voltage monitor as defined in Claim 20 wherein said means for detecting and storing comprises: a) a full wave rectifier connected across a source of common mode voltage on the monitored line; b) an electro-opto isolator connected to receive the output of said rectifier and to provide a voltage proportional thereto; c) a sample and hold circuit for receiving said voltage and storing a voltage proportional to the peak common mode voltage received; and d) means for deleting the stored voltage from said sample and hold circuit.
Claim 25
Dependent Claim
90 words
In a line voltage monitor, an impulse detector comprising: A) a high pass filter connected to a source of line voltage to be monitored and adapted to pass impulses to be monitored; B) a current transformer connected to receive impulses from said filter, and provide a current proportional thereto; ,C) a sample and hold circuit for receiving said proportional current and storing a voltage proportional to the peak voltage of the biggest impulse received by it; and D) means for deleting the stored voltage from said sample and hold circuit.
Claim 26
Dependent Claim
90 words
In a line voltage monitor, an impulse detector comprising: A) a high pass filter connected to a source of line voltage to be monitored and adapted to pass impulses to be monitored; B) a current transformer connected to receive impulses from said filter, and provide a current proportional thereto; ,C) a sample and hold circuit for receiving said proportional current and storing a voltage proportional to the peak voltage of the biggest impulse received by it; and D) means for deleting the stored voltage from said sample and hold circuit.
Claim 27
Dependent Claim
29 words
An impulse detector as defined in Claim 22, and: C) a rectifier for rectifying the output of said filter and for supplying the rectified output to said current transformer.
Claim 28
Dependent Claim
16 words
An impulse detector as defined in Claim 23 wherein said rectifier is a full wave rectifier.
Claim 29
Dependent Claim
35 words
An impulse detector as defined in Claims 22, 23, or 24, and: D) a capacitance divider across the output of said current transformer and having an intermediate terminal connected to said sample and hold circuit.
Claim 30
Dependent Claim
84 words
In an alternating current line voltage monitor, a common mode detector comprising: A) a full wave rectifier connected across a source of common mode voltage on the monitored line; B) an electro-opto isolator connected to receive the output of said rectifier and to provide a voltage prorpotional thereto; C) a sample and hold circuit for receiving said voltage and storing a voltage proportional to the peak common mode voltage received; and D) means for deleting the stored voltage from said sample and hold circuit.
Claim 31
Dependent Claim
84 words
In an alternating current line voltage monitor, a common mode detector comprising: A) a full wave rectifier connected across a source of common mode voltage on the monitored line; B) an electro-opto isolator connected to receive the output of said rectifier and to provide a voltage prorpotional thereto; C) a sample and hold circuit for receiving said voltage and storing a voltage proportional to the peak common mode voltage received; and D) means for deleting the stored voltage from said sample and hold circuit.
Claim 32
Dependent Claim
106 words
An alternating current voltage monitor comprising: A) means for detecting and storing the peak voltage occurring during each half cycle of said AC voltage after filtering out impulses; B) means for storing the peak voltages occurring during a preset plurality of the immediately preceeding half cycles; C) means for determining the average of the stored peak voltages and storing it, if it is greater than a high average threshold or less than a low average threshold together with the time of occurrence of the first half cycle a threshold was exceeded; and D) means for storing the duration a threshold was exceeded each consecutive half cycle.
Claim 33
Dependent Claim
106 words
An alternating current voltage monitor comprising: A) means for detecting and storing the peak voltage occurring during each half cycle of said AC voltage after filtering out impulses; B) means for storing the peak voltages occurring during a preset plurality of the immediately preceeding half cycles; C) means for determining the average of the stored peak voltages and storing it, if it is greater than a high average threshold or less than a low average threshold together with the time of occurrence of the first half cycle a threshold was exceeded; and D) means for storing the duration a threshold was exceeded each consecutive half cycle.
Claim 34
Dependent Claim
113 words
An event monitoring system comprising: A) a detector module for monitoring at least two qualities and comprising: a) means for storing threshold values for said qualities and detecting an event when said thresholds are exceeded; b) means for storing up to a predetermined number of the last occurring events of all qualities; and c) means for storing at least one worst occurring event of at least one quality; and B) a printer module comprising: a) means for commanding said detector module to transmit the information stored therein; b) means for printing said information; and c) means for entering threshold values utilizing three separate key entries and no numeric keyboard or plural position switches.
Claim 35
Dependent Claim
113 words
An event monitoring system comprising: A) a detector module for monitoring at least two qualities and comprising: a) means for storing threshold values for said qualities and detecting an event when said thresholds are exceeded; b) means for storing up to a predetermined number of the last occurring events of all qualities; and c) means for storing at least one worst occurring event of at least one quality; and B) a printer module comprising: a) means for commanding said detector module to transmit the information stored therein; b) means for printing said information; and c) means for entering threshold values utilizing three separate key entries and no numeric keyboard or plural position switches.
Claim 36
Dependent Claim
61 words
A detector module for monitoring at least two qualities comprising; A) means for storing threshold values for said qualities and detecting an event when said thresholds are exceeded; B) means for storing up to a predetermined number of the last occurring events of all qualities; and C) means for storing at least one worst occurring event of at least one quality.
Claim 37
Dependent Claim
61 words
A detector module for monitoring at least two qualities comprising; A) means for storing threshold values for said qualities and detecting an event when said thresholds are exceeded; B) means for storing up to a predetermined number of the last occurring events of all qualities; and C) means for storing at least one worst occurring event of at least one quality.
Claim 38
Dependent Claim
48 words
A printer module of an event monitoring system comprising: A) means for commanding a detector module to transmit information stored therein; B ) means for printing said information; and C) means for entering threshold values utilizing three separate key entries and no numeric keyboard or plural position switches.
Claim 39
Dependent Claim
48 words
A printer module of an event monitoring system comprising: A) means for commanding a detector module to transmit information stored therein; B ) means for printing said information; and C) means for entering threshold values utilizing three separate key entries and no numeric keyboard or plural position switches.
Claim 40
Dependent Claim
23 words
An event monitor system as defined in Claims 28 or 30 wherein said printer module further comprises means for carrying said event monitor.
Claim 41
Dependent Claim
28 words
An event monitor system as defined in Claims 28 or 29 wherein said detector module further comprises an event defeat switch for preventing the storing of further data.
Claim 42
Dependent Claim
31 words
An event monitor system as defined in Claims 28 or 29 wherein said detector module further comprises an event light which lights upon the occurrence of an event and continues lighted.
Claim 43
Dependent Claim
25 words
The event monitor system defined in Claim 33 wherein said detector module further comprises an event light defeat switch which turns off said event light.
Claim 44
Dependent Claim
38 words
The event monitor system defined in Claims 28 or 29 wherein said detector module further comprises a battery for maintaining the storage of events during blackouts and two switches which must be turned off to disconnect said battery.
Claim 45
Dependent Claim
29 words
An event monitor system as defined in Claims 28 or 30 for monitoring line voltage; and: D) separate non-interchangeable line cords for said printer module and said detector module.
Claim 46
Dependent Claim
46 words
An event monitor system for monitoring line voltage as defined in Claims 28 or 30, and: E) means for mounting said detector module to said printer module; and F) said printer module comprising a power line connection from said detector module line cord to said detector.
Claim 47
Dependent Claim
40 words
An event monitor system as defined in Claim 36, and: E) means for mounting said detector module to said printer module; and F) said printer module comprising a power line connection from said detector module line cord to said detector.
Claim 48
Dependent Claim
32 words
An event monitor system as defined in Claims 28 or 30, wherein said printer module comprises transmission line connector means for connecting said detector module both within and without said printer module.
Claim 49
Dependent Claim
21 words
An event monitor system as defined in Claim 39 wherein said connector means comprises a male and a female mating connector.
Claim 50
Dependent Claim
30 words
An event monitor system as defined in Claim 37 wherein said printer module comprises transmission line connector means for connecting said detector module both within and without said printer module.
Claim 51
Dependent Claim
70 words
An alternating current line voltage monitor comprising: A) means connected to a line to be monitored and for deriving therefrom a sync signal synchronous-with the oscillations of the line; B) means responsive to said sync signal to monitor the line voltage at the repetition rate of the sync signal; and C) means for supplying an artificial sync signal during blackouts at a rate slower than the oscillation of the line.
Claim 52
Dependent Claim
70 words
An alternating current line voltage monitor comprising: A) means connected to a line to be monitored and for deriving therefrom a sync signal synchronous-with the oscillations of the line; B) means responsive to said sync signal to monitor the line voltage at the repetition rate of the sync signal; and C) means for supplying an artificial sync signal during blackouts at a rate slower than the oscillation of the line.
Claim 53
Dependent Claim
24 words
The line voltage monitor defined in Claim 42 wherein said rate is such that both 50 and 60 Hertz line voltages may be monitored.
Claim 54
Dependent Claim
135 words
A line voltage monitor comprising: A) a detector module comprising: a) means for connecting to power lines having two differing nominal voltages one at a time; b) means for comparing the actual events on the line being monitored with predetermined thresholds that are scaled in proportion to the ratio of said nominal voltages; B) a printer module comprising: a) means for transmitting to said detector module said predetermined thresholds including a minimum voltage; b) means responsive to said minimum voltage being greater than a predetermined value to transmit to said detector module a nominal voltage signal indicating that the higher of said two differing voltages is to be monitored; and said detector module further comprising: c) means for transmitting events to said printer module including measured values to be scaled and said nominal voltage signal.
Claim 55
Dependent Claim
135 words
A line voltage monitor comprising: A) a detector module comprising: a) means for connecting to power lines having two differing nominal voltages one at a time; b) means for comparing the actual events on the line being monitored with predetermined thresholds that are scaled in proportion to the ratio of said nominal voltages; B) a printer module comprising: a) means for transmitting to said detector module said predetermined thresholds including a minimum voltage; b) means responsive to said minimum voltage being greater than a predetermined value to transmit to said detector module a nominal voltage signal indicating that the higher of said two differing voltages is to be monitored; and said detector module further comprising: c) means for transmitting events to said printer module including measured values to be scaled and said nominal voltage signal.
Claim 56
Dependent Claim
90 words
A computer memory integrity checker comprising: A) a volatile computer memory having a fixed word length of x bits and a series of words stored therein containing all combinations of said x bits; B) means for reading out said series of words in a predetermined order; C) means for generating said series of words in the same order; and D) means for comparing the series of words read out of said memory with the series of words generated by said generating means and generating an error signal, if they disagree.
Claim 57
Dependent Claim
90 words
A computer memory integrity checker comprising: A) a volatile computer memory having a fixed word length of x bits and a series of words stored therein containing all combinations of said x bits; B) means for reading out said series of words in a predetermined order; C) means for generating said series of words in the same order; and D) means for comparing the series of words read out of said memory with the series of words generated by said generating means and generating an error signal, if they disagree.
Claim 58
Independent Claim
90 words
The method of checking the integrity of a volatile computer memory having a fixed word length of x bits comprising the steps of: A) storing a series of words in the memory containing all combinations of said x bits; B) reading out said series of words in a predetermined order; C) generating said series of words in the same order; and D) comparing the series of words read out of said memory with the series of words generated by said generating means and generating an error signal if they disagree.
Claim 59
Independent Claim
90 words
The method of checking the integrity of a volatile computer memory having a fixed word length of x bits comprising the steps of: A) storing a series of words in the memory containing all combinations of said x bits; B) reading out said series of words in a predetermined order; C) generating said series of words in the same order; and D) comparing the series of words read out of said memory with the series of words generated by said generating means and generating an error signal if they disagree.
Claim 60
Dependent Claim
18 words
The checker or method of Claims 45 or 46 wherein said series of words is a number series.
Claim 61
Dependent Claim
36 words
The checker or method of Claims 45 or 46 wherein said series of words is the series of cardinal numbers from 0 to y X where y is the number of possible states of each bit.
Claim 62
Dependent Claim
178 words
A data entry system comprising: A) a memory for storing entered data; B) a printer; C) a keyboard; D) data entry means: a) responsive to single key entry of a first kind to print a line of data in said memory; b) responsive to a first single key entry of a second kind to print a cursor adjacent a digit of said line of data; c) responsive to a single second key entry of said second kind to print said cursor adjacent another digit of said line of data; d) responsive to each single key entry of a third kind to print adjacent said cursor and the digit adjacent thereto a digit of the cardinal number system adjacent said digit adjacent said cursor; e) responsive to a single key entry when said cursor has been printed at all adjacent digits of said line of data to print a new line of data with the changed digits and a symbol; and f) then responsive to a single key entry to enter said new line of data into said memory.
Claim 63
Dependent Claim
178 words
A data entry system comprising: A) a memory for storing entered data; B) a printer; C) a keyboard; D) data entry means: a) responsive to single key entry of a first kind to print a line of data in said memory; b) responsive to a first single key entry of a second kind to print a cursor adjacent a digit of said line of data; c) responsive to a single second key entry of said second kind to print said cursor adjacent another digit of said line of data; d) responsive to each single key entry of a third kind to print adjacent said cursor and the digit adjacent thereto a digit of the cardinal number system adjacent said digit adjacent said cursor; e) responsive to a single key entry when said cursor has been printed at all adjacent digits of said line of data to print a new line of data with the changed digits and a symbol; and f) then responsive to a single key entry to enter said new line of data into said memory.
Claim 64
Independent Claim
171 words
A method of data entry using a restricted keyboard and a printer comprising the steps of: A) storing entered data; B) responsive to single key entry of a first kind, printing a line of data in said memory; C) responsive to a first single key entry of a second kind, printing a cursor adjacent a digit of said line of data; D) responsive to a single second key entry of said second kind, printing said cursor adjacent another digit of said line of data; E) responsive to each single key entry of a third kind, printing adjacent said cursor and the digit adjacent thereto a digit of the cardinal number system adjacent said digit adjacent said cursor; F) responsive to a single key entry when said cursor has been printed at all adjacent digits of said line of data, printing a new line of data with the changed digits and a symbol; and G) then responsive to a single key entry to enter said new line of data into said memory.
Claim 65
Independent Claim
171 words
A method of data entry using a restricted keyboard and a printer comprising the steps of: A) storing entered data; B) responsive to single key entry of a first kind, printing a line of data in said memory; C) responsive to a first single key entry of a second kind, printing a cursor adjacent a digit of said line of data; D) responsive to a single second key entry of said second kind, printing said cursor adjacent another digit of said line of data; E) responsive to each single key entry of a third kind, printing adjacent said cursor and the digit adjacent thereto a digit of the cardinal number system adjacent said digit adjacent said cursor; F) responsive to a single key entry when said cursor has been printed at all adjacent digits of said line of data, printing a new line of data with the changed digits and a symbol; and G) then responsive to a single key entry to enter said new line of data into said memory.
Claim 66
Dependent Claim
16 words
The data entry system of Claims 49 or 50 wherein the printer is a line printer.
Claim 67
Dependent Claim
29 words
The data entry system of method of Claims 49 or 50 wherein when said cursor is printed on the same line upon a key entry of said second kind.
Claim 68
Dependent Claim
32 words
The data entry system or method of Claims 49, 50, 51 or 52 wherein the key entry that causes said new line of data to be printed is of said second kind.
Claim 69
Dependent Claim
30 words
The data entry system or method of Claim 53 wherein the key entry that causes said new line of data to be entered in memory is of said first kind.
Claim 70
Dependent Claim
33 words
The data entry system or method of Claims 49, 50, or 51 wherein the key entry that causes said new line of data to be entered in memory is of said first kind.
Claim 71
Dependent Claim
60 words
An event monitor comprising: A) means for storing at least one worst event of at least one kind; and B) means for comparing each new event after termination thereof with said worst events storage means and for storing the new event and if said worst events storage means is full, for deleting from storage the least significant event stored therein.
Claim 72
Dependent Claim
60 words
An event monitor comprising: A) means for storing at least one worst event of at least one kind; and B) means for comparing each new event after termination thereof with said worst events storage means and for storing the new event and if said worst events storage means is full, for deleting from storage the least significant event stored therein.
Claim 73
Dependent Claim
39 words
The event monitor system as defined in Claim 36 wherein said detector monitor line cord comprises male and female piggy-back connectors for connecting to a power ' line to be monitored and to critical apparatus to be connected thereto.
Claim 74
Dependent Claim
9 words
Every novel system, apparatus, method, or article disclosed herein.
Claim 75
Dependent Claim
9 words
Every novel system, apparatus, method, or article disclosed herein.
References Cited (Backward Citations)
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