This invention relates to warning devices for proximity of vehicles including heavy equipment, television trucks or any other vehicle that may come into contact with a high-voltage power lines for avoiding dangerous and damaging contact.
There are known sensors of proximity of vehicles to high-voltage power lines, but none with the high sensitivity and precision of detection and effective warning to equipment operators of proximity taught by this invention.
Dangerous and damaging contact of high-voltage power lines by vehicles continues to be a problem to equipment operators, to their rescuers, to affected users of electricity, to power companies, to construction companies and to other users of the vehicles.
Examples of most-closely related known but different devices are disclosed in the following patents:
Objects of patentable novelty and utility taught by this invention are to provide a high-voltage proximity warning system and method which:
This invention accomplishes these and other objectives with a high-voltage proximity warning system having a local panel for being positioned in or about a cab of heavy equipment or vehicle, a remote panel in predetermined electrical communication with the local panel and one or more proximity antennas for being positioned selectively on the heavy equipment or vehicle in predetermined electrical communication with the local panel. The local panel is adapted to be push-button operable conveniently by an operator with gloved hands in a cab position where it is readily visible and easily connectable electrically to the remote panel and to the one or more proximity antennas. The remote panel is adapted to be positioned in the vicinity of the local panel where it can be protected for supportive operation and accessed for plural electrical connection to electrical devices that can include a power source, speakers, warning devices and alarm devices. The top side of the local panel includes a display screen, a warning light, a high-warning light, an alarm light, a high-alarm-light and four pushbuttons. The bottom side of the local panel includes antenna terminals, a line-contact terminal and a data terminal. The remote panel includes a data terminal for connection of the data terminal of the local panel, battery connections and speaker connections. Pluralities of warning relays, high-warning relays, alarm relays, high-alarm relays and play/record pushbuttons for each of the warnings, alarms and voice messages. A method for use includes basically configuring the operating parameters by the user technician and adjusting the alarm setpoint by the equipment operator.
The above and other objects, features and advantages of the present invention should become even more readily apparent to those skilled in the art upon a reading of the following detailed description in conjunction with the drawings wherein there is shown and described illustrative embodiments of the invention.
This invention is described by appended claims in relation to description of a preferred embodiment with reference to the following drawings which are explained briefly as follows:
Listed numerically below with reference to the drawings are terms used to describe features of this invention. These terms and numbers assigned to them designate the same features throughout this description.
Referring to
A remote panel 3 is adapted for being positioned in predeterminedly operational, audio and visual remoteness from the local panel 1. Up to six electrical-field-sensing proximity antennas 4, as shown in
The one or more electrical-field-sensing proximity antennas 4 have shielded antenna cables 6 with antenna plugs 7 that are connectable to antenna jacks 8 on a local panel underside 9 of the local panel 1 for being in predetermined electrical communication with a local system computer 10 in the local panel 1.
The remote panel 3 has a plurality of electrical terminals which include a double-poled electrical-source terminal 11. The remote panel 3 has a plurality of remote data terminals which include one or more speaker terminals 12, one or more warning relays 13, one or more high-warning relays 14, one or more alarm relays 15, one or more high-alarm relays 16, a play/record light 56, a microphone jack 55, a play/record pushbutton 17, a warning-message test pushbutton 18, a high-warning-message test pushbutton 19, an alarm-message test pushbutton 20, a high-alarm-message test pushbutton 21, a startup-message test pushbutton 22, and a line-contact-message test pushbutton 23 in predetermined electrical communication with the remote system computer 41.
A local panel topside 24 of the local panel 1 has a plurality of local data transmitters which include a display screen 25, a warning light 26, a high-warning light 27, an alarm light 28, a high-alarm-light 29, an on/off power pushbutton 30, a lower pushbutton 31, a raise pushbutton 32 and a test pushbutton 33 in predetermined communication with the local system computer 10.
The local panel 1 has a local data jack 34 on the local panel underside 9 in predetermined electrical communication with the local system computer 10. The remote panel has a remote data jack 35 in predetermined electrical communication with the remote system computer 41. A data cable 36 is adapted for conveyance of electrical power current from the remote panel 3 to the local panel 1, and for electrical data communication intermediate the local datajack 34 and the remote data jack 35.
The local system computer 10 is adapted and positioned to receive, to computer-process and to communicate high-voltage sensing data from the proximity antennas 4 for communication to and for relay by communication and warning devices through the display screen 25, through the local data transmitters, to the remote system computer 41. The remote system computer 41 is adapted and positioned to receive, to computer-process and to communicate data to the remote data terminals and to the local panel 1 predeterminedly. The local system computer 10 has a configuration mode with a configuration menu for configuring the local system computer 10 and the remote system computer 41 with features of items of the configuration menu.
The configuration menu is adapted for being accessible with a configuration cable 37 having a local data plug 38 in communication with the local data jack 34 and having an adapter plug 39 in communication with a first end of the data cable 36 that has a second end in communication with the remote data jack 35, as shown in FIGS. 6 and 10-12.
The plurality of up to six proximity antennas 4 are positioned on portions of the heavy equipment 5 or vehicle devices for avoiding shadowing of directional electrical-field sensing from high voltage lines 40 by the proximity antennas 4, as depicted in
The electrical communication of the proximity antennas 4 with the local panel 1 includes communication of a predeterminedly low-voltage of electricity from the local panel 1 to the proximity antennas 4 for creating a testing circuit of electricity intermediate all portions of the proximity antennas 4 and the local panel 1 predeterminedly. A low-voltage functional testing current is maintained intermediate an antenna display status to the display screen 25 and all portions of the proximity antennas 4 and line-contact antenna 43.
As shown in
A predeterminedly small DC electrical current for checking electrical continuity of the proximity antenna 4 against short-circuits, open circuits or electrical grounding is communicated to the local panel 1 continuously.
As depicted in
As depicted in
The proximity antenna circuitry senses the voltage difference between the voltage induced into the proximity antenna 4 and the voltage induced into the heavy-equipment 5 or vehicle. The heavy-equipment 5 or vehicle may or may not be at ground potential. The line-contact circuitry includes a correction signal to the proximity antenna circuitry in the event that an ungrounded or partially ungrounded heavy-equipment 5 or vehicle comes into close proximity to high-voltage lines 40 thereby inducing a voltage into the heavy-equipment 5 or vehicle resulting in a lower voltage differential between the proximity antenna 4 and the heavy-equipment 5 or vehicle and the earth directly beneath the vehicle and provides the correction signal to the proximity antenna circuitry thereby eliminating the signal level error that would result from using an ungrounded or partially ungrounded heavy-equipment 5 or vehicle.
A predeterminedly small DC current for continuously checking electrical continuity of two of the conductors of the shielded four-conductor cable 47 to the line-contact sensor 46 against short-circuits, open circuits or grounding is communicated to the local panel 1 continuously. A third one of the four-conductor pins 49 is connected to the shield of the shielded four-conductor cable 47. A fourth of the four-conductor pins 49 is reserved for optional use.
As depicted in
The local system computer 10 is adapted for the display screen 25 to display a warning-message to the heavy-equipment 5 or vehicle operator in the event a failure or fault of a proximity antenna 4 or line-contact antenna 43. The warning-message includes identity of any one or more faulted proximity antennas 4 or line-contact antenna 43 as shown in FIG. 14. The local system computer 10 is adapted to alternate the antenna fault status message
The local system computer 10 is adapted is adapted for the display screen 25 to display a warning-message to the heavy-equipment 5 or vehicle operator in the event of failure of communication between the local panel 1 and the remote panel 3. The local system computer 10 is adapted to alternate the remote panel communication fault message
The alarm light 28 on the local panel 1 is adapted to be factory set with the local system computer 10 for actuation at a proximity-antenna closeness to high-voltage lines 40 that will result in a signal level indication that is equal or greater than the alarm setpoint as shown on the display screen 25 as depicted in FIG. 13. The range within which the alarm setpoint can be set by the heavy-equipment operator or vehicle operator is adapted to be set by the user technician while in the configuration mode. The alarm setpoint is adapted to be adjustable by the heavy-equipment operator or vehicle operator between a minimum value of ten signal units and a maximum value of the maximum alarm setpoint such that the heavy equipment or vehicle operator is prevented from inadvertently setting the alarm setpoint at a dangerously high level. The maximum alarm setpoint is programmable from forty-to-eighty signal units by the user technician with the local system computer 10 in the configuration mode.
Communication from the local system computer 10 for actuation of the alarm light 28 includes predetermined communication to the remote system computer 41 and subsequently to additional alarm and communication devices 50. Included in the communication devices is a factory default alarm voice message and a factory default alarm beep pattern that consists of three short, high-frequency beeps that is actuated whenever the signal level indication on the display screen 25 is greater than the alarm setpoint and is lower than the high-alarm setpoint and a line-contact alarm condition is not actuated. The alarm voice message is alternated with the alarm beep pattern while the alarm is actuated. The user technician can disable or change the content of the alarm voice message with the local system computer 10 in the configuration mode. While an alarm condition is actuated and the alarm voice message is disabled, the alarm beep pattern continues until the signal level decreases below the alarm setpoint or the signal level increases above the high-alarm setpoint and a line-contact alarm condition is not actuated. The warning light 26, the high-warning light 27 and the alarm light 28 are lit while an alarm condition is actuated and a line-contact alarm condition is not actuated.
The local system computer 10 is programmed for the high-alarm-light 29 to be actuated by actuation of the alarm light 28 followed by continued approach towards high-voltage lines 40. The factory default setting for actuation of the high-alarm-light is ten signal units greater than the alarm setpoint. The value of the high-alarm-light setpoint is adjustable from four-to-twenty signal units above the alarm light setpoint by the user technician with the local system computer 10 in the configuration mode.
Communication from the local system computer 10 for actuation of the high-alarm-light 29 includes predetermined communication to the remote system computer 41 and subsequently to the additional high-alarm and communication devices 50. Included in the optional communication is a factory default high-alarm voice message and a factory default high-alarm beep pattern that consists of four very short, very high-frequency beeps that is actuated whenever the signal level indication on the display screen 25 is greater than the high-alarm setpoint. The high-alarm voice message is alternated with the high-alarm beep pattern while the high-alarm is actuated. The user technician can disable or change the content of the high-alarm voice message with the local system computer 10 in the configuration mode. While the high-alarm condition is actuated and the high-alarm voice message is disabled, the high-alarm beep pattern continues until the signal level decreases below the high-alarm setpoint and a line-contact alarm condition is not actuated. The warning light 26, the high-warning light 27, the alarm light 28 and the high-alarm-light 29 are lit while a high-alarm condition is actuated and a line-contact alarm condition is not actuated.
The local system computer 10 is programmed for the high-warning light 27 to be actuated by actuation of the warning light 26, followed by continued approach towards high-voltage lines 40. The factory default setting for actuation of the high-warning light 27 is ten signal units below the alarm setpoint. The value of the high-warning light setpoint is adjustable from four-to twenty signal units below the alarm light setpoint by the user technician with the local system computer 10 in the configuration mode.
Communication from the local system computer 10 for actuation of the high-warning light 27 includes predetermined communication to the remote system computer 41 and subsequently to the additional high-warning and communication devices 50. Included in the communication devices is a factory default high-warning voice message and a factory default high-warning beep pattern that consists of two long, low-frequency beeps that is actuated whenever the signal level indication on the display screen 25 is greater than the high-warning setpoint and is lower than the alarm setpoint and a line-contact alarm condition is not actuated. The high-warning voice message is alternated with the high-warning beep pattern while the high-warning is actuated. The user technician can disable or change the content of the high-warning voice message with the local system computer 10 in the configuration mode. While the high-warning condition is actuated and the high-warning voice message is disabled, the high-warning beep pattern continues until the signal level decreases below the high-warning setpoint or the signal level increases above the alarm setpoint and a line-contact alarm condition is not actuated. The warning light 26 and the high-warning light 27 are lit while a high-warning condition is actuated and a line-contact alarm condition is not actuated.
The local system computer 10 is programmed for the warning light 26 to be actuated by approach towards high-voltage lines 40. The factory default setting for actuation of the warning light 26 is ten signal units below the high-alarm setpoint. The value of the warning light setpoint is adjustable from four-to twenty signal units below the high-warning setpoint by the user technician with the local system computer 10 in the configuration mode.
Communication from the local system computer 10 for actuation of the warning light 26 includes predetermined communication to the remote system computer 41 and subsequently to the additional warning and communication devices 50. Included in the communication devices is a factory default warning voice message and a factory default warning beep pattern that consists of two very long, very low-frequency beeps that is activated whenever the signal level indication on the display screen 25 is greater than the warning setpoint but is lower than the high-warning setpoint and a line-contact alarm condition is not actuated. The warning voice message is alternated with the warning beep pattern while the warning is actuated. The user technician can disable or change the content of the warning voice message with the local system computer 10 in the configuration mode. While the warning condition is actuated and the warning voice message is disabled, the warning beep pattern continues until the signal level decreases below the warning setpoint or the signal level increases above the high-warning setpoint and a line-contact alarm condition is not actuated. The warning light 26 is lit while a warning condition is actuated and a line-contact alarm condition is not actuated.
The local system computer 10 is programmed for the line-contact alarm to be actuated whenever high-voltage lines 40 come into direct contact with heavy equipment 5 or a vehicle. A line-contact sensor 46 is fastened to the protected underside of the heavy equipment 5 or vehicle whose function is to sense the electric field as a result of a difference in electrical potential between the heavy equipment 5 or vehicle and the earth beneath the vehicle. A factory default setting for actuation of the line-contact alarm is fifteen line-contact signal units. The value of the line-contact setpoint is adjustable from one-to-forty line-contact signal units by the user technician with the local system computer 10 in the configuration mode.
Communication from the local system computer 10 for actuation of the warning light 26, the high-warning light 27, the alarm light 28 and the high-alarm-light 29 includes communication to the remote panel computer 4 and subsequently to the additional warning and communication devices 50. Included in the communication devices is a factory default line-contact alarm voice message and a factory default alarm pattern that is activated whenever the line-contact signal exceeds the line-contact alarm setpoint and is deactivated whenever the line-contact signal decreases below the line-contact alarm setpoint. While the line-contact alarm is activated, the line-contact alarm voice message is alternated with the line-contact alarm pattern and the warning light 26, the high-warning light 27, the alarm light 28 and the high-alarm-light 29 blink in a predetermined pattern. The user technician can change the content of the line-contact alarm voice message and select one of four line-contact alarm patterns with the local system computer in the configuration mode.
The local system computer 10 is programmed for a startup message to be actuated when the local panel is initially energized. The factory default setting for the actuation of the startup message is enabled. The startup message can be enabled or disabled or changed in content by the user technician with the local system computer 10 in the configuration mode. While the startup message is activated, a warning, a high-warning, an alarm, a high-alarm or a line-contact alarm will override the startup message.
The power pushbutton 30 is adapted for actuation by the heavy-equipment operator or vehicle operator for energizing the high-voltage proximity warning system through the remote panel 3 which is energized downstream electrically from a heavy-equipment ignition terminal 51 that has been turned on.
A default safety precaution is programmed into the local system computer 10 to avoid danger and damage from turning on the ignition terminal 51 and operating the heavy-equipment 5 or other vehicle without activating the power pushbutton 30. The default safety precaution includes adaptation of the local panel 1 to be energized without energizing the display screen 25 and for wakeup and alarm from occurrence of a signal level to the alarm setpoint as though the power pushbutton 30 were pressed. The local panel 1 then cannot be turned off by the power pushbutton while the alarm condition is still in effect. The default safety precaution is programmable by the user technician for wake-up whenever the signal level equals either the warning light setpoint, the high-warning light setpoint, the alarm light setpoint or the high-alarm-light setpoint. The default safety precaution is terminable by the user technician with the local system computer 10 in the configuration mode.
The lower pushbutton 31 is adapted for use by the heavy-equipment operator or vehicle operator to decrease the alarm setpoint while the local panel 1 is not in the configuration mode. The raise pushbutton 32 is adapted for use by the heavy-equipment operator or vehicle operator to increase the alarm setpoint while the local panel computer is in the normal mode. The alarm setpoint is not changed by turning the local panel 1 on or off. The minimum value of the alarm setpoint is ten signal units as displayed on the display screen 25. The maximum value of the alarm setpoint is the value of the maximum alarm setpoint set by the user technician while the local panel is in the configuration mode. The lower pushbutton 31 and raise pushbutton are adapted for use by the user technician while the local panel 1 is in the configuration mode.
The test pushbutton 33 is adapted for use by the heavy-equipment operator or vehicle operator to indicate the absence or existence of antenna faults when pressed while the local panel 1 is not in the configuration mode. Codes are provided for indicating which, if any, of the proximity antennas 4 or line-contact antenna 43 are faulted. While the local panel 1 is in the configuration mode, the test pushbutton 33 is adapted to select various configuration modes and to save the configuration settings into the memory of the local system computer 10 and remote system computer 41.
Display-screen messages for testing antenna status and remote-panel communication are shown in
The local panel 1 is adapted to be mounted within approximately six feet of the heavy-equipment operator or vehicle operator for providing full view of the local panel 1 and for providing immediately convenient access to control pushbuttons. The local panel 1 includes two brackets 52 having attachment-fastener knobs 53 for secure mounting in any foreseeable geometry on or about a heavy-equipment cab 2 or vehicle. The brackets 52 are adapted for elevation of the local panel underside of the local panel 1 for ease of attaching proximity antennas 4, line-contact antenna 43, data cable 36 and configuration cable 37 where it will not obstruct the activities of the heavy-equipment operator or vehicle operator. The local panel 1 is adapted for protection against the elements, for rugged use and for harsh environments with connections to the local panel 1 being watertight. Additional protection can be provided for environments that include highly conductive contaminants, such as coal dust, by applying silicon grease or its equivalent to the mating parts of the cable connectors and plugs.
As shown in
The remote panel 3 is shown in
The configuration menu of the local system computer 10 is accessible by the user technician and is adapted for being accessible by pushing the power pushbutton 30 after placing the configuration cable 37 having the local data plug 38 in communication with the local data jack 34 and having the adapter plug 39 in communication with a second end of the data cable 36 that has a first end in communication with the remote data jack 35.
The configuration menu includes a plurality of configuration items. The configuration items are accessed sequentially by pressing the test pushbutton 33; this action also saves the value of the previously displayed configuration into the memories of the local system computer 10 and the remote system computer 41. While in the configuration mode, if the power is removed by any means, the value of the current configuration item shown on the display screen 25 is not saved into, the memories of the local system computer 10 or the remote system computer 41. The configuration items include selections that are adjustable by pressing the raise pushbutton 32 and the lower pushbutton 31.
The plurality of configuration items of the configuration menu includes a maximum alarm setpoint. The maximum alarm setpoint is adjustable between a minimum value of forty signal units and a maximum value of eighty signal units. This allows the heavy-equipment operator or vehicle operator to adjust the alarm setpoint on the display screen 25 between a low value of ten and a high value of the maximum alarm setpoint.
The plurality of configuration items of the configuration menu includes a panel wake-up that is adapted to activate the high-voltage proximity warning system without pushing the power pushbutton 30 in the event that the heavy equipment 5 or vehicle comes into sufficient proximity of high-voltage lines 40 such that the resulting signal level would equal or exceed the warning light setpoint. The panel wake-up is adapted for five user technician options of wake-up modes which include:
The raise pushbutton 32 is adapted to be pressed for scrolling upwardly through the wakeup modes which appear on the display screen 25. The lower pushbutton 31 is adapted to be pressed for scrolling downwardly through the wakeup modes which appear on the display screen 25. The selected wakeup mode is set by pressing the test pushbutton 33. Pressing the test pushbutton 33 saves the wakeup mode into the memory of the local system computer 10 and scrolls the configuration menu to the warning-light span adjustment mode. Display-screen wakeup selections are shown in
The plurality of configuration items of the configuration menu includes the warning-light span. The warning-light span is the signal level difference between the warning-light setpoint and the high-warning-light setpoint. The factory default setting of the warning-light span is ten signal units.
The local computer system 10 is adapted for user technician configurational adjustment of the warning-light span between a minimum value of four signal units to a maximum value of twenty signal units.
The plurality of configuration items of the configuration menu includes the high-warning-light span. The high-warning-light span is the signal level difference between the high-warning-light setpoint and the alarm setpoint. The factory default setting of the high-warning-light setpoint is ten signal units. The local system computer 10 is adapted for user technician configurational adjustment of the high-warning-light span between a minimum value of four signal units to a maximum value of twenty signal units.
The plurality of configuration items of the configuration menu includes the high-alarm-light span. The high-alarm-light span is the signal level difference between the alarm setpoint and the high-alarm-light setpoint. The factory default setting of the high-alarm-light setpoint is ten signal units. The local system computer 10 is adapted for user technician configurational adjustment of the high-alarm-light span between a minimum value of four signal units to a maximum value of twenty signal units.
The plurality of configuration items of the configuration menu includes the warning-message enable/disable adjustment mode. The warning-message is a factory default voice message that follows a warning consisting of one very long, very low frequency beep pattern that is activated whenever the signal level indication on the display screen is greater than the warning setpoint but is lower than the high-warning setpoint. The factory default configuration setting of the warning-message enable/disable mode is enabled.
The plurality of configuration items of the configuration menu includes the high-warning-message enable/disable adjustment mode. The high-warning-message is a factory default voice message that follows a high-warning consisting of two long, low frequency beep pattern that is activated whenever the signal level indication on the display screen is greater than the high-warning setpoint but is lower than the alarm setpoint. The factory default configuration setting of the high-warning-message enable/disable mode is enabled.
The plurality of configuration items of the configuration menu includes the alarm-message enable/disable adjustment mode. The alarm-message is a factory default voice message that follows an alarm consisting of three short, high-frequency beep pattern that is activated whenever the signal level indication on the display screen is greater than the alarm setpoint but is lower than the high-alarm setpoint. The factory default configuration setting of the alarm-message enable/disable mode is enabled.
The plurality of configuration items of the configuration menu includes the high-alarm-message enable/disable adjustment mode. The high-alarm-message is a factory default voice message that follows a high-alarm consisting of four very short, very high-frequency beep pattern that is activated whenever the signal level indication on the display screen is greater than the high-alarm setpoint. The factory default configuration setting of the high-alarm-message enable/disable mode is enabled.
The plurality of configuration items of the configuration menu includes the startup-message enable/disable selection mode. The startup message is a factory default voice message that is annunciated when the local panel 1 is energized. The factory default configuration setting of the startup-message enable/disable is enabled.
The plurality of configuration items of the configuration menu includes the line-contact-message-length. The line-contact message is a factory default voice message that follows a line-contact alarm consisting of one of the four line-contact alarm types that is actuated whenever the line-contact antenna 43 senses the existence of a high-voltage electric potential on the heavy-equipment 5 or vehicle relative to the potential of the ground immediately under the heavy-equipment 5 or vehicle. The factory default setting of the line-contact-message-length is ten seconds.
The plurality of configuration items of the configuration menu of the configuration menu includes the line-contact-alarm type selection. The line-contact-alarm is one-of-four possible alarm types that precedes the line-contact voice message that is actuated whenever the line-contact antenna 43 senses the existence of a high-voltage electric potential on the heavy-equipment 5 or vehicle relative to the potential of the ground immediately under the heavy-equipment or vehicle. The line-contact-alarm provides four possible selections of alarm types:
The default line-contact-alarm type is type one.
The plurality of configuration items of the configuration menu includes the antenna-gain selection mode. The antenna-gain selection provides a means to adjust the signal level indication as shown in
The plurality of the configuration items of the configuration menu includes the line-contact alarm setpoint adjustment mode. The line-contact alarm setpoint is set at a factory default value of fifteen line-contact signal units. The line-contact alarm setpoint is set after the line-contact sensor 46 portion of the line-contact antenna 43 is installed on a protected underside of heavy equipment 5 or other vehicle. The first line of the display screen 10 shown in
The plurality of configuration items in the configuration mode includes message playing and recording. While in the configuration mode, the local system computer 10 and the remote system computer 41 are adapted for playing all of the individual warnings or alarms along with their associated voice messages, and for recording all of the voice messages with an optional microphone plugged into the microphone jack 55 located on the remote panel 3. Alarms and warnings with their associated messages, are played by momentarily pressing one of the associated message test pushbuttons 18-23 located on the remote panel 3. Messages are recorded by first pressing the play/record pushbutton 17 followed by momentarily pressing one of the message pushbuttons 18-23. The message may be recorded while the play/record light 56 is lighted at which time both pushbuttons may be released.
An electrical line protector, which can include a fuse, can be positioned intermediate at least one data terminal on the remote panel and a remote communication device 50 to which the data terminal is connected for a remote function.
A method for using the high-voltage-proximity warning system has the following steps:
The method for using further comprises:
Configuring the local system computer 10 and the remote system computer 41 includes selecting and computer-saving features of the configuration items of the configuration menu that place desired limitations of operation of the operational menu by the heavy-equipment operator or vehicle operator with the local panel 1.
The method for using further comprises:
Customizing communications can include providing voice communications and further remote communication from the remote panel 3.
A new and useful high-voltage proximity system and method having been described, all such foreseeable modifications, adaptations, substitutions of equivalents, mathematical possibilities of combinations of parts, pluralities of parts, applications and forms thereof as described by the following claims and not precluded by prior art are included in this invention.
This application claims the benefit of U.S. Provisional Application Ser. No. 60/364,980, filed Mar. 14, 2002.
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Number | Date | Country | |
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20030174061 A1 | Sep 2003 | US |
Number | Date | Country | |
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60364980 | Mar 2002 | US |