Networking and multimedia adapter for power outlets

A power outlet adaptor device having a housing, at least one multimedia, networking and/or communications component, and an electrical socket box including at least one electrical socket is provided. The multimedia, networking, and/or communications component is secured within the housing and provides multimedia, networking and/or communications capabilities. The electrical socket accommodates an electrical device plug. The housing fits around the electrical socket box. The electrical socket box electrically couples to the multimedia, networking, and/or communications component.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to power line communications. Specifically, the present invention relates to adaptor devices configured to be attached to existing wall outlets, where the adaptor devices incorporate networking, power, and multimedia circuitry for communicating with various devices, systems, and networks.

2. Background of the Invention

There exist today many forms and types of networks, both wired and wireless, that allow for high speed data communication. The common thrust of all of these networks is to provide communication between devices, as well as access to the Internet. On the other hand, the common problem with many of these networks is that they have to be deployed, which can be very costly and time consuming just to set up the network infrastructure. In recent years there has been substantial interest in coming up with a way of communicating at high speeds and at high data rates over AC power lines. Power lines are advantageous because the network is already in place and is available to almost every home and business in the world.

Power lines and power transmission networks suffer from some problems, most notably noise and inconsistent impedance. Power line communication is not a new concept, and there have been various methods and technologies that have been developed to allow for reliable communication. One such method that can be used for broadband communication is OFDM (Orthogonal Frequency Division Multiplexing). This allows for the use of a large number of closely spaced carriers to transmit data across the line. This carrier multiplexing along with the use of data interleaving and FEC coding provide a robust and reliable communication method to overcome the inherent problems of a power line.

When looking at a common power transmission network, it can be broken up into three (3) main segments. From a standard power substation, there is commonly a “distribution” network of medium voltage power lines, configured in a loop and several miles in length, that feed out to an area of homes and businesses. Then, at various points on the loop there exist step down transformers that provide a series of 110-240 V “access” lines depending on the country to a small number of homes and/or businesses. At the end of each one of these lines there is typically a meter or meters present for each electricity customer served by that line. Then, on the other side of each meter there exists a typical “in-home” electricity distribution network inside a home or business.

It can be seen that all three of the network segments could possibly be used to transmit data across. However, it can be said that the “access” and “in-home” segments of this network are adjacent networks, with only an electricity meter in between. Also, it is very likely that the data transmitted on each of these segments will be for different purposes and have different destinations. For example, data transmitted on the access network segment could have multiple destinations or could be available to all end points, whereas data on an in-home network would likely be internal to that home or business. Thus, it is advantageous to logically separate these network segments to allow for separation and protection of data traveling on each segment. One possible method of accomplishing this is to allocate different frequency ranges or time segments for each segment. This allows for separation and also non-interference between segments.

A problem may arise, however, in this arena where there exists a legacy system in place, operating in a certain frequency range or within a predetermined time structure, and there is a desire to add communication on another network segment. In this case the legacy system may have to disable some of its carriers or reallocate time segments to allow for bandwidth allocated to the new system, thus diminishing its own bandwidth. However, the legacy system may not allow for this. It is also conceivable that the legacy system could be shifted up or shifted down in frequency or forced to change the behavior with regard to the timing of the communication to accommodate, but this would most likely require a change to the hardware and also would no longer allow it to communicate with other units of the same type. There is also the possibility of using blocking filters to isolate the network segments, but this would add extra expense and installation cost and may not be advantageous for many applications.

There exist today a number of communication networks that operate over a broad band and at high speeds. These networks may operate on different mediums and different frequency ranges, but they all must comply with a certain radiation limit as well as other limits that may be imposed based on other devices or networks operating in the same frequency range. Due to the broadband nature of these networks, it is likely that there will be areas of the frequency band that cannot be used due to other communication devices occupying these areas. A common example of this would be amateur radio bands that occupy certain frequencies throughout the RF radio spectrum. This may require notches to be put in place throughout a broadband communication system's operating frequency range. Another common requirement at the edges of this range is to have a steep roll off in transmitted power and be able to comply with a certain power spectral density limit beyond the edges of the operating frequency range. This often contributes to additional high-order filters or other means of spectral management being added to the design.

These high-order filter requirements can make the design of an analog front end very complicated, very large, and therefore very costly. In order to keep these issues in check, and to still satisfy the filtering requirements, it may be advantageous to increase the sampling frequency of the analog front end. This will often allow for simplifying of the filter designs as well as improved resolution on the received signal.

Power line communication (PLC) systems are well known in the art. See, for example, the book entitled “The Essential Guide to Home Networking Technologies” published in 2001 by Prentice-Hall, Inc., co-pending U.S. application Ser. No. 09/290,255, filed Apr. 12, 1999, the web site http://www.homeplug.org of the Home Plug Powerline Alliance and the article entitled “Home Plug Standard Brings Networking to the Home” in the December 2000 issue, Vol. 16, No. 12, of the Communication Systems Design magazine.

Power line communications for Internet access is a powerful technology that offers the consumer many real advantages over other forms (e.g., DSL, cable modems, etc.). These advantages include: power distribution networks to all homes and businesses are already in place, and PLC technology has been demonstrated to work at high data rates, as well as many other advantages. Power line communications allow making communication connections in a low cost manner between the power line distribution cables or wires, such as the pole-mounted cables or wires (any segment of the power line distribution network applies here including, but not limited to the LV (low voltage) and MV (medium voltage) networks and the home or business offices. Connecting to the power distribution network can be difficult and expensive requiring turning off network power during installation.

Power line communication systems apply modulated radio frequency carriers, e.g. carriers having frequencies in the range from about 2-80 MHz for access and from about 2 MHz to 50 MHz, for in home communications to power lines.

Electrical power distribution systems, commonly used in the United States, distribute the electrical power at 60 Hz from the source over cables, insulated or uninsulated. At the source, the voltage is high, e.g., over 200,000 volts and by means of transformers, the voltage is reduced by a transformer or transformers to a medium voltage, e.g., of the order of 20,000 volts, to be delivered to consumers by at least three cables or wires suspended from poles. At some of the poles, there are transformers which further reduce the voltage to low voltage of the order of 117 volts between a cable and a ground or neutral cable for the delivery of power to one or more customers or consumers. The power lines from the output of a pole transformer to the customers premises connect to a power consumption meter which in turn connects to the wiring in the customer's premises (e.g., home power wiring).

While the pole transformer and the power consumption meter cause comparatively little power loss at the low frequency at which the power is supplied, both the transformer and the meter can cause substantial radio frequency, communication signal power loss. Therefore, a parallel communication signal electrical path around at least the pole transformer has been provided to improve the communication signal power in the premises wiring. However, the prior art proposals for the parallel path have involved conductive (galvanic) connections both at the input and output of the pole transformer which requires skilled installers and in at least some cases, interruption of the power during installation of parallel path, by-pass equipment.

In today's world, a substantial number of household devices operate using some form of electricity. In one case, household devices operate using a battery power source that is integrated within the devices. These include laptop computers, stereo systems, electric shaving razors, etc. Typically, battery life of such devices is very limited, which prevents prolonged usage of the device and in some cases, such as laptop computers, causes possible loss of data, when batter runs out of power. Yet, other household devices cannot operate without being connected to a power outlet. Such device include kitchen devices (e.g., refrigerators, electric ranges, dishwashers, etc.), communications equipment (e.g., telephones, modems, routers, servers, etc.), multimedia devices (e.g., printers, facsimiles, televisions, DVD-players, VHS-players, desktop computers, etc.), and other devices that require sufficient continuous source of power to properly operate. Such devices are typically connected to a 110 Volt electrical outlet (or a 220 Volt outlet or other type voltage outlet depending on the country). Such electrical outlets are connected (e.g., hard-wired) to a number of electrical lines that are in turn hard-wired to electrical junction boxes in the house (or a building). The junction boxes are in turn connected to electrical micro-grids, which are part of larger grids connected to power stations that generate electricity, as illustrated inFIG. 1.

Typically, a household contains a specific number of electrical power outlets into which household devices can be plugged in. Such electrical power outlets as well as the junction box allow only a certain number of devices connected to the electrical system in the house, i.e., the electrical lines in the household are designed to accept a specific load. Each electrical line has a specific load limit that is determined by the amount of current that the line can supply. Exceeding electrical line's limit (i.e., connecting too many devices to the line) causes overload and a power outage on that particular electrical line. Thus, if too many devices are connected to the line, it may overload.

Further, a limited number of electrical outlets in the household prevents electrical connection of a group of devices located in one spot. For example, each of the following devices: a laptop computer, a printer located next to the computer, a modem, a router, a server, a laptop speaker system, and other multi-media devices, may require a separate electrical outlet. A power strip device that plugs into the electrical outlet may accommodate electrical needs of all of these devices by providing multiple sockets on a single power strip plate. The power strip then connects to the available electrical outlet with a single plug. However, the power strip device adds to the clutter with the wires coming from the connecting devices, consumes an electrical outlet and prevents other devices from connecting to the power outlet. The power strip device may also immobilize mobile units having wireless communication capabilities.

Currently available electrical outlet adaptors include vapor dispensing devices. The vapor dispensing adaptor attaches to an electrical outlet and dispenses aroma vapors. In some cases, the vapor dispensing adaptor devices are plugged into the outlet, thereby consuming one or all available electrical sockets. In other cases, the vapor dispensing adaptors are plugged into the outlet but retain the availability of the sockets. However, they do not provide for connection to multimedia, networking, and communication devices.

Additionally, some conventional outlet adaptor devices that can be plugged into an existing outlet are extremely bulky. When plugged in, these adaptor devices substantially protrude away from the wall, consume a lot of space, create an obstacle when placing objects in their vicinity, and do not preserve outlet space.

Thus, there is a need for a power outlet adaptor device that is capable of preserving electrical outlet availability for connection of devices, providing multimedia, networking, and other communication capabilities to devices, and retaining an aesthetic appeal of an electrical outlet. There is also a need for an outlet adaptor device that has multimedia, networking, and communication capabilities as well as resembles a standard electrical wall outlet without substantially protruding away from the wall, and thus, retaining its aesthetic appeal.

SUMMARY OF THE INVENTION

The present invention relates to power line communications. In particular, the present invention relates to adaptor devices configured to be connected to electrical wall outlets. The adaptor devices include multimedia, networking, and communication capability, as well as, preserve electrical outlet availability for connection of various devices.

In an embodiment, the adaptor device includes a housing and at least one multimedia, networking and/or communications component configured to be secured within the housing. The component provides multimedia, networking and/or communications capabilities. The device also includes an electrical socket box that includes at least one electrical socket that accommodates an electrical device plug. The housing is configured to fit around the electrical socket box. The electrical socket box is further configured to be electrically coupled to the at least one multimedia, networking, and/or communications component.

In an alternate embodiment, the adaptor device is configured to be electrically wired to an existing electrical line and further configured to replace an existing wall outlet.

In another alternate embodiment, the adaptor device includes at least one plug configured to be electrically coupled to the electrical socket box. The plug is configured to be inserted into an electrical outlet and is further configured to provide power to the multimedia, networking and/or communications component.

In yet another alternate embodiment, the present invention relates to a method of making the adaptor device. The method includes providing a housing and securing at least one multimedia, networking and/or communications component within the housing. The multimedia, networking and/or communications component configured to provide multimedia, networking and/or communications capabilities. The method further includes providing an electrical socket box that includes at least one electrical socket configured to accommodate an electrical device plug. The housing is configured to fit around the electrical socket box. The method also includes electrically coupling the electrical socket box to the multimedia, networking, and/or communications component.

Further features and advantages of the invention, as well as structure and operation of various embodiments of the invention, are disclosed in detail below with references to the accompanying drawings.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1illustrates a conventional electrical system100. System100includes an electrical power outlet102, house electrical line106, house junction box108, electrical micro-grid114, electrical grid118, electrical power station120, and power lines112,116, and122. The electrical power outlet102includes a plurality of sockets104to which various electrical devices (not shown inFIG. 1) can be attached. The electrical power outlet102is coupled to the junction box108via the house electrical line106. The junction box108includes a plurality of switches110. The switches110connect external electrical power line112to the house electrical lines106. Each switch can supply electrical power to a specific electrical line106within the house. The electrical line106can service a plurality of electrical outlets102, electrical power switches (not shown inFIG. 1), or other devices requiring electric power to operate.

The electrical micro-grid114connects the house electrical junction box108to the grid118via electrical power lines112and116. The micro-grid114can include electrical sub-station that provides switching of electrical current supplied by the electrical power station120through the grids118. A plurality of micro-grids114can be connected to a plurality of grids118. Further, each micro-grid114can service a plurality of households or buildings containing electrical junction boxes108.

The grids118are coupled to the electrical power station120via power lines122. The power lines122can be any conventionally known high-voltage power lines. As can be understood by one skilled in the art, the above description of the system100is presented for illustrative purposes only and is not intended to limit the scope of the present invention. Further, some components of the electrical system100may have been omitted for ease of illustration.

FIG. 2illustrates conventional electrical power outlets202and204. Electrical power outlet202is an outlet designed to supply electricity to devices operating under voltage of 220 Volts. Such outlets are typically used in European countries, where voltage is 220V. The outlet202includes two sockets212and214and a cover222. The sockets212and214are designed to accommodate a two prong plug having rounded prongs (not shown inFIG. 2). The cover222is configured to allow the sockets212and214to show through the cover222. The cover222is typically plastic, although other materials can be used. Electrical power outlet204is an outlet designed to supply electricity to devices operating under voltage of 110 Volts. Such outlets are typically used in North American countries, where operating voltage is 110V. The outlet204includes two sockets216and218and a cover224. The sockets216and218are designed to accommodate a two prong plug having flat prongs (not shown inFIG. 2). The cover224is configured to allow the sockets212and214to show through the cover224. Similarly to the cover222, the cover224is typically plastic, although other materials can be used.

The power outlets202and204are typically mounted on a wall in a room of a house (or a building). The outlets202and204are coupled to the electrical line106(not shown inFIG. 2) by hard-wiring the outlets202,204's electrical contacts to the electrical line106wires. Such wiring is typically done in accordance with specific electrical safety guidelines and regulations, so as to prevent a possibility of malfunction or fire. It is typical that rooms within houses are pre-wired with electrical lines106and appropriate wall openings are made for installation of electrical outlets202or204. The electrical lines106are exposed through such wall openings so that the electrical power outlets202or204can be hard-wired to the electrical line106. Once the wiring of the power outlets202or204to the electrical line106is completed, the respective covers222and224are attached to the wall to close the openings made in the wall for mounting electrical power outlets202and204.

The embodiments ofFIG. 2illustrate power outlets202and204having two sets of sockets. As can be understood by one skilled in the art, a single or a multiple socket power outlet can be used instead of a two-socket outlet. Multiple socket power outlets can accommodate a number of devices requiring electricity for their operation.

FIG. 3illustrates a front view and a side view of an electrical power outlet having an electrical plug plugged into one of its sockets. An electrical outlet300placed on the wall310includes two sockets312and318. A plug314, connected (using wire316) to an electrical device (not shown inFIG. 3), occupies socket318. The only socket that remains available is socket312. As such, only one additional device can be plugged into the outlet300.

FIGS. 4A-4Cillustrate various embodiments of an adaptor device400, according to the present invention.FIGS. 4A and 4Billustrate embodiments of the adaptor device400that is configured to be plugged into an existing electrical outlet, according to the present invention.FIG. 4Cillustrates an embodiment of the adaptor device400that is configured to be wired to an existing electrical line and replace an existing electrical outlet, according to the present invention. The following is a more detailed discussion of each of the embodiments shown inFIGS. 4A-4C.

FIG. 4Aillustrates side views of an adaptor device400that is configured to be plugged into an electrical outlet415, which is attached to a wall410, according to the present invention. The illustrated adaptor device400accommodates a two-socket outlet. As can be understood by one skilled in the art, the adaptor device400can accommodate outlets having any number of sockets.

The adaptor device400includes a pair of plugs412aand412b, a base417, a cover plate or a housing416having a face426, electrical socket box414, a multimedia/networking/communications component418, and a pair of sockets422,424. In this embodiment, the plugs412and the electrical socket box414are configured to be coupled to the base417and the housing416is configured to fit around the electrical socket box414and attach to the base417. The component418is configured to be secured within the housing416.

The plugs412are configured to fit into the electrical outlet sockets (not shown inFIG. 4). The plugs412, as shown, are accommodated by a 110 V outlet. As can be understood by one skilled in the art, the plugs412can be configured to fit into a 220 V outlet or any other type of outlet. Additionally, the plugs412can include a ground connection (i.e., a three-prong plug) that can be accommodated by electrical outlets having a ground connection. As can be understood by one skilled in the art, the plugs412can be configured to fit into electrical outlets having any number of sockets (e.g., plugs412can be four-prong plugs, five-prong plugs, etc., which are sometimes required for electrical devices with higher electricity consumption parameters).

The base417electrically couples the plugs412a,412band sockets422,424placed on the face426of the housing416. The sockets422,424can be configured to be disposed on the face426of the housing416in such a way as to resemble a regular wall outlet (as the one illustrated inFIG. 2). This way, the aesthetic appeal of the regular wall outlet is preserved without cluttering electrical wall outlet415with bulky attachments.

In addition to providing wiring from the plugs412a,412bto sockets422,424, the electrical socket box414provides wiring for the multimedia, networking, and/or communications component418. In an embodiment, the electrical socket box414is configured to be electrically coupled to the component418. The component418can be a printed circuit board that contains data and multimedia networking circuitry. The component418can also provide networking capabilities, such as wireless capabilities to various devices placed in the household. For example, the component418can serve as a wireless modem for computers located in various rooms in a household. The component418can also provide multimedia capabilities. For example, component418can provide various text, audio, graphics, animation, video, and/or other capabilities either by itself or along with devices that are configured to communicate with it. The component418draws power from the electrical line coupled to the electrical outlet415through the electrical socket box414. As can be understood by one of ordinary skill in the art, the capabilities of the component418are not limited to those listed above.

In an embodiment, component418is electrically coupled to the plug412aand, thus, the plug412aprovides electrical power to the component418. In an alternate embodiment, component418is electrically coupled to the plug412band, thus, the plug412bprovides electrical power to the component418. In another alternate embodiment, component418is electrically coupled to the plugs412aand412b, hence, both plugs provide power to the component418. In yet another alternate embodiment, one or both plugs412are electrically coupled to the electrical socket box414, which is in turn electrically coupled to the component418. As can be understood by one skilled in the art, other ways of providing power to the component418are possible.

In an embodiment, the housing416includes a light-emitting structure419. The light-emitting structure419is electrically coupled to the component418. The light-emitting structure419may emit variable intensity and/or color (e.g., red, yellow, and greed) light based on parameters associated with networking traffic processed by the component418, status of the component418, as well as, nature and content of the multimedia that is handled by the component418. The component418can also indicate status of the multimedia and/or communications data that is being handled by the component418. As can be understood by one skilled in the art, the light produced by the light-emitting structure419can indicate other status of the component418or the entire adaptor device400.

In an alternate embodiment, the adaptor device400may include additional multimedia, networking, and/or communications interfaces (not shown inFIG. 4, but are shown inFIG. 5) that can provide power and other types of connectivity to various device coupled to such multimedia, networking, and/or communications interfaces. The component418can be coupled to such additional interfaces and provide various types of connectivity to devices coupled to the additional interfaces. Alternatively, the component418is not coupled to the additional interfaces but provides connectivity to devices specifically coupled to the component418. As can be understood by one skilled in the art, the component418and/or additional multimedia, networking, and/or communications interfaces can provide wireless, wired, or wireline connections to various devices.

The adaptor device400, when plugged into the outlet415, slightly protrudes away from the wall410. Thus, the adaptor device400, when plugged into the electrical outlet415, appears to have sufficiently minimal thickness so that it fits the above referenced component418, any additional multimedia, networking and/or communications interfaces, and electrical wiring for the sockets422and424. As such, the adaptor device400, when plugged in, is capable of maintaining aesthetic appeal of the wall and the electrical outlet415. In an embodiment, the adaptor device400is sized to be of substantially the same height and width as the electrical outlet415. Such sizing further preserves aesthetic appeal of the adaptor device400. Because of adaptor device's minimal thickness and substantially the same equal length and width, the adaptor device400resembles the original electrical wall outlet415.

In an embodiment, the adaptor device's housing416can be removable. Thus, a user can exchange the housing416with another housing416, but still maintain all electrical connections attached to the electrical wall outlet415. The housing416can be attached to the adaptor device400by screws, bolts, Velcro®, clips, clamps, adhesives, snap-ons, or any other means. The housing416can be of different colors, configured to be painted by the user, or translucent.

As can be understood by one skilled in the art, the adaptor device400can include a single plug412and being able to be plugged into either a single socket or a multiple socket electrical wall outlet415and provide at least one socket422in its electrical socket box414. For example, the adaptor device400, having a single plug412, can include two or more sockets422in its electrical socket box414. This allows plugging more than one device into the adaptor device400.

In the embodiment shown inFIG. 4B, the adaptor device400includes all of the above listed elements, except the base417. In this embodiment, the plugs412are configured to be electrically coupled to the electrical socket box414. The component418is also configured to the be electrically coupled to the electrical socket box414. As inFIG. 4Aembodiment, the socket box414includes the sockets422and424that accommodate electrical device plugs. As can be understood by one skilled in the art, the socket box414can include at least one electrical socket422(or424).

Similarly toFIG. 4Aembodiment, the electrical socket box414is configured to provide electrical coupling to the component418, the light emitting structure419, the plugs412, and the sockets422and424. As inFIG. 4A, the component418and the structure419are configured to be secured within the housing416. The housing416is configured to fit around the electrical socket box414. In an embodiment, the housing416contacts the existing wall outlet415once the adaptor device400is plugged into the outlet415. The housing416can be attached to the outlet415by means of screws, bolts, Velcro®, clips, clamps, adhesives, snap-ons, or other means. Embodiments shown inFIGS. 4A and 4Bare configured to maintain the outlet space in the house and retain the aesthetic appeal of standard electrical outlets.

In an embodiment shown inFIG. 4C, the adaptor device400does not include the base417or the plugs412. Instead, the adaptor device400is configured to be wired to the existing electrical line (not shown inFIG. 4C) in a household or a building. The adaptor device400includes electrical socket box414having sockets422and424, housing416, multimedia, networking, and/or communications component418, light emitting structure419, and electrical wires425(a,b,c).

The wires425are electrically coupled to the electrical socket box414and are further configured to electrically couple the adaptor device400to the household's electrical line. Once the wires425are coupled to the electrical line, the adaptor device400is inserted into an opening created for a wall outlet. As can be understood by one of ordinary skill in the art, the adaptor device can be configured to fit into an opening sized for a standard electrical wall outlet or any other type of opening (not shown inFIG. 4C). Once inserted into the opening, the adaptor device400appears as a standard electrical wall outlet (as shown inFIGS. 4C and 6). As inFIGS. 4A and 4Bembodiments, the housing416can fit around the electrical socket box414. Also, the housing416can be configured to attach to the wall (on the interior and/or exterior sides of the wall). The housing416can be coupled to the wall using screws, bolts, Velcro®, clips, clamps, adhesives, snap-ons or any other means. This embodiment of the adaptor device400eliminates the use of plugs412(shown inFIGS. 4A and 4B), replaces existing electrical wall outlets, preserves outlet space in the house, and maintains aesthetic appeal of wall outlets.

FIG. 5Aillustrates a cross-sectional view of the adaptor device400shown inFIGS. 4A and 4B. As shown, the adaptor device400includes the electrical socket box414that contains sockets422and424(not shown inFIG. 5A, but illustrated inFIGS. 4A and 4B) and the housing416that surrounds the socket box414. As illustrated inFIG. 5A, the housing416has rounded edges. As can be understood by one having skill in the art, the edges of the housing416can be square, round, oval, triangular, or any other desired shape.

Multimedia/networking/communications components512and514are disposed within the housing416. The components512and514are similar to the component418and additional multimedia/networking/communications devices discussed with respect toFIGS. 4A and 4B. As shown inFIG. 5A, the components512and514are disposed on each side of the electrical socket box414. As can be understood by one skilled in the art, the multimedia, networking, and/or communications components can be disposed in any location of the adaptor device400.

FIG. 5Billustrates a cross-sectional view of the adaptor device400shown inFIG. 4C. The shown adaptor device400does not include plugs412, but instead includes wires425for electrically wiring the adaptor device400to an existing electrical line.

FIG. 6illustrates a front view of the adaptor device400, as shown in eitherFIG. 4A,4B, or4C, that includes the housing416(the face426of the housing416is shown shaded) that fits around (or surrounds) the electrical socket box414that includes a pair of sockets422and424. In an embodiment, the housing416is configured to friction fit around the electrical socket box414. As shown inFIG. 6, the adaptor device400on the outside appears as a regular electrical wall outlet that is can be used for plugging in various devices.