RELATED APPLICATION This application claims priority of U.S. Provisional Application Ser. No. 60/683,579 filed May 23, 2005, the contents of which are herein incorporated by reference as if set forth in their entirety.
FIELD OF THE INVENTION The present invention relates to surveillance systems that may be placed at remote sites and which record activities at the remote sites.
BACKGROUND Surveillance systems, particularly video monitoring security systems, are popularly utilized in both residential and commercial areas, at shopping malls, construction sites, and border areas and virtually at any location at which it would be beneficial to monitor activities. Such systems provide security by deterring unlawful or otherwise improper activities, minimizing losses, maximizing worker productivity, identifying the causes of accidents and crimes and so forth. There are various surveillance systems currently available that capture images from the location of the surveillance system and provide these images for viewing.
A shortcoming associated with conventional surveillance systems that provide video images of the area being monitored, is that power must be provided to the system. Moreover, the power supply must be continuous if continuous surveillance is desired. It is difficult to provide electrical power in many cases where the security systems are used at remote locations. For example, it is difficult to provide power to security systems desired at remote construction locations where electrical power has not yet been provided. It is similarly difficult to provide electrical power to security systems that may be desired in undeveloped regions such as along national borders. Moreover, when the security system is used to monitor multiple locations that may be spread out over acres or miles, it is even more problematic to provide power to the various locations
The present invention addresses these shortcomings.
SUMMARY OF THE INVENTION The present invention provides a remote, self-powered surveillance system which may include multiple surveillance units each of which wirelessly transmits video images to the internet.
According to one aspect, the invention provides a stand-alone surveillance system that includes a self-generating power source, a digital video recorder (DVR) and a plurality of video cameras. Each camera obtains digital signals of images and provides the digital signals to the DVR that records the images. A remote receiver acts as a hub and receives wirelessly transmitted signals of the images and provides these images to the internet by way of a plurality of video signals that correspond to the plurality of video cameras.
According to another aspect, a stand-alone surveillance system with a plurality of monitoring units and a hub is provided. Each monitoring unit comprises a self-generating power source. The self-generating power source may be a battery, a hydrogen fuel cell, a solar panel, a hydroelectric generator, or a wind generator. Each monitoring unit further includes a digital video recorder (DVR), an inverter, and a plurality of video cameras. Each video camera records digital signals of video images and provides the digital signals to the DVR which records these video images. The hub includes a hub receiver that receives wireless signals of the video images from each DVR and provides the video images to the internet which simultaneously displays multiple video images.
According to another aspect of the present invention, the cameras and other aspects of the monitoring units are controlled via the internet.
According to yet another aspect, a surveillance method is provided. The method comprises self generating power from a self-generating power source which may be a wind generator, a hydroelectric generator, one or more batteries, a hydrogen fuel cell or at least one solar panel. The method further includes directing the power to a DVR and at least one video camera disposed at a unit. The method further includes each video camera obtaining digital signals of video images and providing the digital signals to the DVR. The DVR records the images and the video signals corresponding to each camera are wirelessly transmitted from the DVR to a receiver. The method further provides for the receiver providing a video image corresponding to each video signal to the internet.
According to yet another aspect, a surveillance method for monitoring events at a plurality of remote locations is provided. The method includes providing a plurality of monitoring units. Each monitoring unit comprises a self-generating power source, an inverter and a plurality of video cameras, each recording digital signals of video images and providing the digital signals to the DVR which records the video images. The method further includes providing a hub with transmit and receive capabilities, wirelessly transmitting a video signal from each camera of the monitoring unit to a hub and the receiver providing a video image corresponding to each video signal to the internet. According to another aspect, the method includes remotely controlling the video cameras using the internet.
BRIEF DESCRIPTION OF THE DRAWING The present invention is best understood from the following detailed description when read in conjunction with the accompanying drawing. It is emphasized that, according to common practice, the various features of the drawing are not necessarily to scale. On the contrary, the dimensions of the various features are arbitrarily expanded or reduced for clarity. Like numerals denote like features throughout the specification and drawing.
FIG. 1 a schematic layout of an exemplary surveillance system with multiple monitoring units;
FIG. 2 a schematic generally showing a layout of elements of an exemplary monitoring unit of the invention;
FIG. 3 is an exterior side view of an exemplary monitoring unit of the invention;
FIG. 4 is an exterior front view of an exemplary monitoring unit of the invention;
FIG. 5 is an exemplary monitor display of multiple images provided via the internet;
FIGS. 6-9 are schematic diagrams of exemplary self-powering monitoring units using various power sources; and
FIG. 10 is a schematic of the low power distribution system of the invention.
DETAILED DESCRIPTION The invention provides a surveillance system that includes self-powering monitoring units that may be placed in remote locations far from electric power and far from internet access. The self-powering units may be powered by a plurality of batteries, a fuel cell such as a hydrogen fuel cell, a hydroelectric generator, a wind generator, or one or more solar cells. The power source provides power, through an inverter, to one or more cameras, one or more lights, one or more infrared illuminators, a transmitter/receiver and various other electrical peripherals at the monitoring unit. Among the electrical peripherals are an electrical temperature control system of the monitoring unit, a system for electronic card access into the monitoring unit, additional power provided to an external power output receptacle and a digital readout corresponding to the external power output receptacle and indicating the amount of additional power that may be used without compromising the integrity of the monitoring unit, and a video monitor that may be disposed at the housing. This list of electrical peripherals at the monitoring unit is intended to be exemplary only and other electrical features may be provided at the remote monitoring unit and powered by the self-powering source in other exemplary embodiments.
Another aspect of the invention is that each monitoring unit includes a digital video recorder, DVR, that records video images from each of the plurality of video cameras and a transmitter/receiver that transmits these images wirelessly to a receiver that includes a router and simultaneously provides these images to the internet. A plurality of images from various remote locations may be simultaneously displayed on the internet and may be displayed simultaneously on one screen, according to one exemplary embodiment. Additionally, an internet user with proper access credentials may remotely control various aspects of the monitoring unit such as the cameras, by accessing the correct IP (internet protocol) address and sending wireless signals to the transmitter/receiver.
Now referring toFIG. 1, the exemplary surveillance/security system includes a plurality ofmonitoring units2.Monitoring units2 transmitwireless signals6 to antenna8 ofreceiver10. Antenna8 is preferably a two-way antenna that functions as a transmitter as well as a receiver.Receiver10 includes a router and is hard-wired12 to theinternet14 via a computer using a conventional arrangement. A plurality of video images can be simultaneously displayed on the internet using various techniques. Moreover, an internet user with appropriate access credentials may control various aspects of the cameras and images as well as other devices atmonitoring unit2 using theinternet14.
Themonitoring units2 will be shown in further detail infra. Eachmonitoring unit2 is self-powered. The self-generating power source at eachmonitoring unit2 powers the components necessary to obtain and transmit video signals toreceiver10 through an inverter. The self-generating power source also provides power to control other electrical devices at the monitoring unit and may also provide excess power at an external power output receptacle disposed at or near themonitoring unit2.
An aspect of the invention is that wireless signals6 may be transmitted over great distances and therefore distance16 between two of the monitoring units anddistance20 betweenmonitoring unit2 andreceiver10 may also be several miles.Transmitter4 is preferably a high gain antenna used to both wirelessly transmit and receive signals which may advantageously be digital signals. Various suitable antennas such as high gain access point antennas are commercially available. According to one exemplary embodiment in whichdistance20 betweenmonitoring unit2 andreceiver10 is less than about three miles,transmitter4 may be an access portal transmitter and a conventional LAN network may be used to transmitwireless signals6 frommonitoring unit2 toreceiver10. According to another exemplary embodiment in whichdistance20 is between about three and ten miles, cellular modem transmission including cell towers may be used. In this exemplary embodiment,transmitter4 may be a cellular modem transmitter with a power booster. According yet another exemplary embodiment in whichdistance20 betweenmonitoring unit2 andreceiver10 is about ten miles or greater, wireless signals6 may be transmitted using satellite transmission techniques and in this exemplary embodiment,transmitter4 may be a satellite transmitter. Other suitable arrangements and methods for transmitting video signals fromplural monitoring units2 toreceiver10 may be used in other exemplary embodiments.Receiver10 includes a router capable of receiving and sending several signals simultaneously. Wireless signals6 may each include a static IP address and may include various different frequencies depending on application. For example, frequencies of about 2.4 megahertz (MHz), 3.5 MHz, or 5.8 MHz may be used in various exemplary embodiments.
According to another exemplary embodiment in whichseveral monitoring units2 are used, one of the monitoring units may additionally function as a hub that includes a router and a receiver that receives signals wirelessly transmitted from theother monitoring units2 and is directly wired to the DVR of themonitoring unit2 serving as the hub. According to this exemplary embodiment, themonitoring unit2 that serves as the hub is wired to an internet connection. Wireless transmission from the other units to the hub may be according to one of the aforedescribed methods.
FIG. 2 is a generalized schematic showing basic components of anexemplary monitoring unit2 and is not intended to be limiting as the subsequent figures will show additional components.Monitoring unit2 includes self-generatingpower source24. In one exemplary embodiment,power source24 may be one or more batteries. Various batteries may be used and in one exemplary embodiment, four 12 volt, 250 amp batteries are used but other arrangements and other types of batteries may be used in other exemplary embodiments. In another exemplary embodiment,power source24 may consist of an array of one or more solar panels.
In yet another exemplary embodiment, self-generatingpower source24 may be a fuel cell. A fuel cell is an electrochemical energy conversion device similar to a battery but different from the battery in that the fuel cell is designed for replenishment of consumed reactants. Various fuel cells may be used. In one exemplary embodiment, a hydrogen fuel cell which can supply power with replenishment only every six months, may be used. Hydrogen fuel cells are commercially available and are produced, for example, by Jadoo Power of Folsom, Calif.
In yet another exemplary embodiment,power source24 may be a hydroelectric generator such as may be used in areas that are in the vicinity of flowing water. In yet another exemplary embodiment,power source24 may be a wind generator. Various conventional hydroelectric and wind generators are currently available. The type ofpower source24 used will depend on the environment in which the monitoring unit is being used. Additionally, other power sources may be used in other exemplary embodiments. Self-generatingpower source24 provides DC power26 toinverter28 which converts the DC power to AC power. In the basic arrangement illustrated inFIG. 2,inverter28 provides power tolights34,video cameras30,DVR42 andtransmitter4 through at least one power distribution load center (not shown ) as will be seen inFIGS. 6-10 which show further details of power distribution. The power provided to some components will advantageously be low voltage power such as 12 volt or 24 volt power.Video cameras30 provide digital signals by way ofwires38 toDVR42 which is coupled bywire44 totransmitter4.Transmitter4 transmitswireless signals6 toreceiver10 and theinternet14 as discussed infra and supra. In one exemplary embodiment,power source24,inverter28,DVR42 and additional components may be disposed within a housing as represented by dashedline50 inFIG. 2.
FIGS. 3 and 4 are side and front exterior views, respectively, of an exemplary monitoring unit according to the invention.FIG. 3 showshousing50 which may allow for internal access by a user. In one exemplary embodiment,housing50 may weigh approximately 2,500 pounds to 3,000 pounds to insure it is not moved, but such is exemplary only and various other weights may be used in other exemplary embodiments. In one exemplary embodiment,housing50 may include a length of 10 feet and width of 8 feet and a height of 8 feet providing convenient internal access to a person.Housing50 may be a conventional shipping container, a truck, or other sturdy, wind-proof, waterproof and secure structures made of wood, metal or other durable, strong materials and may advantageously be insulated.
Extending abovehousing50 ismast48 which may include a height of 10 feet in one exemplary embodiment but various other heights may be used in other exemplary embodiments. Mounted onmast48 arecameras30,infrared illuminators34,transmitter4, pan tilt zoom (PTZ)camera56 and lights52. The relative placement of the various features is intended to be exemplary only and in other exemplary embodiments, other arrangements may be used and other numbers of components may also be used. Moreover, in other exemplary embodiments, the components such ascameras30,infrared illuminators34,transmitter4, pantilt zoom camera56, and light52 may be hardwired tohousing50 but not disposed above it. In yet another exemplary embodiment, the components may be mounted onhousing50 such as by means ofmast48 with additional components also hardwired tohousing50.
Referring additionally to the front view ofFIG. 4,housing50 includesdoor58 withlock60, exterioroutput power receptacle62 and keypad/display64. As referred to inFIG. 2,housing50 may contain the DVR, inverter, a power box that distributes AC power from the inverter, and a low voltage power box that distributes low voltage power, e.g., 12V or 24V power.Power source24 may also be inhousing50 in some exemplary embodiments and in other exemplary embodiments, such as whenpower source24 is a solar panel, hydroelectric or wind generator, self-generatingpower source24 may be external tohousing50. Withinhousing50 may additionally be a temperature control system, and one or more video monitors to display images fromcameras30 by way of the DVR. Various commercially available video cameras may be used ascameras30.
In one exemplary embodiment,cameras30 may include a resolution of 520 TVL horizontal and require a minimum subject illumination of 0.001 lux@f.12.Cameras30 may operate using the power supply of AC 24V±10%/60 Hz±1 Hz but other power may be used in other exemplary embodiments.Cameras30 may be rotatable in various directions and in one exemplary embodiment,camera30 may be rotatable by 360°.Cameras30 may include various zoom in and zoom out features as commercially available. It will be seen thatcameras30 may be remotely controlled by an internet user.
In one exemplary embodiment,cameras30 may be used in conjunction with infrared (ir)illuminators34.Infrared illuminators34 provide infrared illumination at a particular location andcameras30 may be infrared cameras that work in conjunction withIR illuminators34 and read the areas illuminated by infrared illumination. Such exemplary cameras are uninfluenced by ambient or ultraviolet light. For example,Infrared illuminator34 may be focused on a license plate of a vehicle at night andcamera30 may easily read the license plate number even with the automobile headlights on, the glare of which would otherwise render it extremely difficult for the camera to read the license plate. Various infrared illuminators may be used asinfrared illuminator34. In one exemplary embodiment,infrared illuminator34 may have a viewing range of up to 100 feet, use high performance 850 mm/940 nm LED's, run on a 12 or 24 volt power supply and may include42 or more LEDs but such is intended to be exemplary only, i.e., various suitable devices may be usedIR illuminators34.
As discussed infra,transmitter4 may be a satellite transmitter, access portable transmitter, or cellular modem transmitter with a power booster and may operate at low or conventional voltage. Pantilt zoom camera56 may be any suitable commercially available type unit. In one exemplary embodiment, pantilt zoom camera56 may be an all-weather indoor/outdoor camera including a vandal-proof dome with23 or more LEDs and it may utilize520 TV lines of resolution color or more. Such is exemplary only and various other models may be used as pantilt zoom camera56 in other exemplary embodiments. Various lights may be used aslights52 and in one exemplary embodiment, light52 may be a 100 watt light that illuminated the surveillance area.
Access intohousing50 may be secured bylock60 in the illustration embodiment but in other exemplary embodiments, access may be gained through a conventional electronic access/key card reader or other electronic device. Keypad/display64 may also be the access point for entering an approved code for access intohousing50. Externalpower output receptacle62 may provide excess power produced bypower source24 for powering additional devices. Keypad/display64 may include a readout of the amount of power that may be obtained through externalpower output receptacle62 without adversely affecting the operation of the surveillance components. Although not visible inFIGS. 3 and 4,inverter28 provides AC power that is distributed to externalpower output receptacle62, keypad/display64, an optional card reader for gaining access intohousing50, internal lights withinhousing50, a monitor withinhousing50 and various other components such as a temperature control system for the inside ofhousing50. The inside ofhousing50 may also allow for storage or serve other utilitarian functions and may include internal lights and power outlets powered bypower source24. Similarly, the exterior ofhousing50 may additionally or alternatively be configured for various functions. It is also noted that a user can, using the correct IP (internet protocol) address, remotely monitor and control the amount of power available through externalpower output receptacle62, the display on keypad54, any key card reader,cameras30 and pantilt zoom camera56, for example.
Referring again toFIG. 2, various digital video recorders may be used asDVR42.DVR42 may be a multiplexer that is a high quality, eight channel recorder capable of storage and playback of images from eight or more cameras. In one exemplary embodiment, the DVR may include an internal hard drive to record and store up to two months of digital recording. The type of hard drive will depend on application. The DVR may be able to record full-screen video images continuously, upon motion detection, or according to a time schedule, to internal hard drives. The DVR may have a capability to simultaneously record, archive background images, and allow multiple user network viewing and playback with no loss of performance. In one exemplary embodiment, the DVR may provide a maximum record rate of up to 30 pictures per second but other rates may be used in other exemplary embodiments.DVR42, in displaying the multiple camera images, may include various commercially available features such as picture-in-picture, quad, electronic zoom, freeze frame and the like.DVR42 may include frame advancement, rewind and up to 4 speeds for fast-forward or rewind of recorded images.DVR42 may include a duplex multiplexer for live quad viewing or playback of images without interrupting multiplex recording.DVR42 may include an event log and may display date and time of incidents recorded.DVR42 may include various scheduling programs and may provide for archiving including a time expiry option that allows images to be held for a selected number of days and then deleted.DVR42 may include various alarms such as a buzzer or automatic e-mail notification. An aspect of the invention is thatDVR42 may be programmed and controlled, real time, by a remote user through the internet. The foregoing features are exemplary only and commercially available DVRs with various features may be used.
Referring additionally toFIG. 1, antenna8 ofreceiver10 is a transmit and receive antenna and one aspect of the invention is that signals may be provided from theinternet14 toreceiver10 and transmitted to the antennas oftransmitter4 ofmonitoring units2 which are adapted for receiving wireless signals. Various commercially available antennas are suitable for both receiving and transmitting wireless signals. Various commercially available routers may be used inreceiver10 to route multiple signals received from the DVRs and also multiple signals that may be internet programmed commands. Once the signals are received by the antennas oftransmitter4, signals sent by an internet user are used to control various aspect ofmonitoring unit2 such asDVR42. Each DVR may be accessed using a dedicated IP (internet protocol) address. In this manner, multiple cameras coupled to the accessed DVR may be controlled from one IP address. For example, the user may command one or more cameras to zoom in, zoom out, rotate, and so forth and may also direct the DVR to freeze images, play back images, and various other features conventionally available using DVRs in conjunction with cameras.
Using the internet, a dedicated IP address may be used to provide access to the various devices, i.e., each device has its own IP address. Such devices include each receiver/transmitter, the DVR including multiple cameras, a temperature control device withinhousing50, an electronic card key reader, power available at the external power output receptacle and the like.
The user may use a standard monitor coupled to a computer with an internet connection, to access the multiple images from eachmonitoring unit2. A single dedicated IP address may be used to access a particular DVR which may be coupled to a plurality of cameras. In this manner, through a single IP address, multiple images (i.e., images from every camera coupled to the selected DVR) may be accessed and simultaneously displayed200 as inFIG. 5, and each of the images can be controlled by the internet user using conventional commands. Multiple images from theother monitoring units2 can be similarly monitored and controlled. For example, the user may select a certain camera and activate the associatedinfrared illuminator34 to isolate a particular area and have the camera directed to reading the field in which IR illumination is directed. In this manner, a user may remotely control aspects of the monitoring unit to focus in on a licensed plate of a vehicle at night even when the headlights are on, the glare of which would otherwise preclude the camera from registering a license plate. Moreover, conventional means may be used to program various software features into the computer through which internet access is provided.
Each ofFIGS. 6-9 is a schematic diagram of various components and each ofFIGS. 6-9 is illustrative of a particular type of power source and should be read in conjunction withFIG. 10. The schematics in each ofFIGS. 6-9 includeinverter28 also discussed supra.Inverter28 may be a conventional inverter, a device that changes direct current into alternating current, or vice versa, orinverter28 may be an inverter and charger.Inverter28 receives input DC and provides AC output power in the illustrated arrangement. Various inverters may be used and in one exemplary embodiment, the inverter may provide 2000 watts of continuous output power with a 5 second surge rating of 5,000 watts at 42 amps.Inverter28 may output power at a voltage of 120V or 240V which is then distributed by anAC load center80 to multiple components that operate at 120V or 240V, such as shown inFIGS. 6-9. According to the embodiment in which inverter28 outputs 120V or 240V power, some of the power may advantageously be conditioned to a low voltage of 12V or 24V power by a lowvoltage load center78 and distributed as inFIG. 10, to components that operate at low voltage.Inverter28 may include an output frequency of 60 Hertz in one exemplary embodiment but the foregoing details are exemplary only and various other inverters or inverter/chargers may be used in other exemplary embodiments.
Now referring toFIG. 6, fuel cell24A is the power source in the schematic illustrated inFIG. 6. Fuel cell24A may be a hydrogen or other fuel cell as discussed supra and is coupled to D/C disconnect76 which is coupled toinverter28. D/C disconnect76 functions as a kill switch which may be used to shut off power to all components.Inverter28 is coupled to A/C load center80 which distributes power to various components of eachmonitoring unit2 and also provides external power to externalpower output receptacle62 which can be used to provide power to various electronic components that may be plugged in to externalpower output receptacle62. Load limitingtransfer switch82 controls the amount of excess power that may be provided externalpower output receptacle62 without adversely affecting the functionality of the cameras, DVR, transmitter and auxiliary components such as lights or IR illuminators, necessary to provide the surveillance video to the internet.
AC load center80 is coupled to and provides distributed typically 120V or 240V power to interior lights and plugs70, i.e. components internal tohousing50.AC load center80 also provides power to pan tiltzoom camera controller56,DVR42, an optional video monitor74 that may be inhousing50, the HVAC (heating, ventilation and air conditioning)unit72, andcamera mast48. By providing power tocamera mast48, illustrated inFIGS. 3 and 4, power is provided tocameras30,infrared illuminators34,lights52 and, in one embodiment, totransmitter4 which may be a satellite transmitter, an access portal transmitter, or a cellular modem transmitter with a power booster.
AC load center80 is coupled to lowvoltage load center78 which converts 120V or 240V power frominverter28 to low voltage power and distributes the low voltage power to various low voltage components such as shown inFIG. 10. The low voltage power may be 12V or 24V power and is distributed, according to one exemplary embodiment, to pantilt camera110, batteryamp hour control112, exteriorwall cameras CCTV114,IR illuminators116, mast mountedcameras118 andHVAC controller120. These components are intended to be exemplary only and in other exemplary embodiments, other components may receive low voltage power distributed from lowvoltage load center78.Broken line122 is used to indicate that lowvoltage load center78 may provide power totransmitter4 in some exemplary embodiments, depending on the specific type of transmitter used. In other exemplary embodiments,transmitter4 may work on 120V or 240V power received fromAC load center80, such connection shown inFIGS. 6-9.
FIG. 7 is a schematic showing another exemplary arrangement in which the self-powering source is a hydroelectric or wind generator. The schematic ofFIG. 7 is substantially similar to the schematic ofFIG. 6 with similar references toFIG. 10, with the following differences. Hydroelectric or wind generator24B provides power tobatteries88 by way ofcharge controller84 which regulates the amount of power sent tobatteries88 and diverts any excess power not useable by thebatteries88 at excessgeneration diversion device86. Excessgeneration diversion device86 may divert the excess power to an air heater or other similar device. In other exemplary embodiments, thebatteries88 may be bypassed andcharge controller84 coupled directly toinverter28 as indicated by dashedline85.
FIG. 8 is a schematic of another exemplary arrangement in which the self-powering source is a solar panel or an array of solar panels. Like components inFIGS. 8 and 9 are as described in conjunction withFIGS. 6, 7 and10.FIG. 8 illustratessolar array24C andsolar combiner90 which combines the power generated by the respective solar panels of the array ofsolar panels24C. In this exemplary embodiment,inverter28 also functions as a charger and chargesbatteries92. According to this exemplary arrangement, during extended periods without sunlight,batteries92 provide backup power tomonitoring unit2.
Another aspect of the invention is illustrated inFIG. 9 which illustrates an on-grid embodiment of the invention in which grid electrical power is optionally provided to the monitoring unit to power the unit. The arrangement includes a battery backup in the form ofbatteries104.Grid power100 may represent hookup to conventional110 volt AC power. According to one exemplary embodiment,charge controller102 regulates power provided fromgrid power100 tobatteries104. According to another exemplary embodiment, not shown,batteries104 may be bypassed andgrid power100 may be provided directly toinverter28 viaDC disconnect76. A switch (not shown) may also be provided to switch the system from the electrical power source,grid power100, to the self powering source,batteries104 substantially instantaneously whengrid power100 ceases to provide electrical power. In one exemplary embodiment, power may be switched to the battery backup in less than 2 milliseconds.
The preceding merely illustrates the principles of the invention. It will thus be appreciated that those skilled in the art will be able to devise various arrangements which, although not explicitly described or shown herein, embody the principles of the invention and are included within its spirit and scope. Furthermore, all examples and conditional language recited herein are principally intended expressly to be only for pedagogical purposes and to aid the reader in understanding the principles of the invention and the concepts contributed by the inventors to furthering the art, and are to be construed as being without limitation to such specifically recited examples and conditions. Moreover, all statements herein reciting principles, aspects, and embodiments of the invention, as well as specific examples thereof, are intended to encompass both structural and functional equivalents thereof. Additionally, it is intended that such equivalents include both currently known equivalents and equivalents developed in the future, i.e., any elements developed that perform the same function, regardless of structure.
This description of the exemplary embodiments is intended to be read in connection with the figures of the accompanying drawing, which are to be considered part of the entire written description. In the description, relative terms such as “lower,” “upper,” “horizontal,” “vertical,” “above,” “below,” “up,” “down,” “top” and “bottom” as well as derivatives thereof (e.g., “horizontally,” “downwardly,” “upwardly,” etc.) should be construed to refer to the orientation as then described or as shown in the drawing under discussion. These relative terms are for convenience of description and do not require that the apparatus be constructed or operated in a particular orientation. Terms concerning attachments, coupling and the like, such as “connected” and “interconnected,” refer to a relationship wherein structures are secured or attached to one another either directly or indirectly through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.
Although the invention has been described in terms of exemplary embodiments, it is not limited thereto. Rather, the appended claims should be construed broadly, to include other variants and embodiments of the invention, which may be made by those skilled in the art without departing from the scope and range of equivalents of the invention.