Patent Publication Number: US-8528235-B2

Title: Article of footwear with lighting system

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. Pat. No. 8,056,269, currently U.S. patent application Ser. No. 12/369,400, entitled “Article of Footwear with Lighting System”, filed on Feb. 11, 2009 and issued on Nov. 15, 2011, which application is hereby incorporated by reference in its entirety and which application is a continuation-in-part of U.S. Pat. No. 8,046,937, currently U.S. patent application Ser. No. 12/114,022, entitled “Automatic Lacing System”, filed on May 2, 2008 and issued on Nov. 1, 2011, which application is incorporated herein by reference in its entirety and is referred to herein as “the automatic lacing system case”. 
    
    
     BACKGROUND 
     The present invention relates generally to footwear, and in particular the present invention relates to a lighting system for an article of footwear. 
     Articles of footwear with illumination systems have previously been proposed. Chang (U.S. patent application publication number 2006/0221596) is directed to a light emitting device for shoes. Chang teaches a shoe using optical fibers and nylon fibers that are woven into a leaflet luminescent panel exposed on any portion of the shoe. The shoe includes a battery that is configured to power the light emitting device. 
     SUMMARY 
     The invention discloses an article of footwear including a lighting system. In one aspect, the invention provides an article of footwear, comprising: an upper including an automatic ankle cinching system; the automatic ankle cinching system including an ankle strap configured to move into and out of a housing; a lighting device disposed on the ankle strap, the lighting device having an illuminated state and a non-illuminated state; an ECU configured to control the operation of the lighting device; a wire including a first end portion configured to connect to the lighting device and the wire including a second end portion configured to connect to a port of the ECU; and where an intermediate portion of the wire disposed between the first end portion and the second end portion is disposed within the housing. 
     In another aspect, the lighting device is configured to rotate about an ankle portion of the article with the ankle strap. 
     In another aspect, the lighting device is in the non-illuminated state when the automatic ankle cinching system is in a loosened position. 
     In another aspect, the lighting device is illuminated state when the automatic ankle cinching system is in a tightened position. 
     In another aspect, the illumination of the lighting device indicates to a user that the automatic ankle cinching system is in a tightened position. 
     In another aspect, the invention provides an article of footwear, comprising: an automatic fastening system configured to tighten a portion of an upper, the automatic fastening system including a tightened position and a loosened position; a lighting system comprising at least one lighting device, the lighting system in communication with the automatic fastening system; and where the at least one lighting device is in an illuminated state when the automatic fastening system is in a tightened position and wherein the at least one lighting device is in a non-illuminated state when the automatic fastening system is in a loosened position. 
     In another aspect, the automatic fastening system is an automatic lacing system associated with an arch portion of an upper. 
     In another aspect, the automatic fastening system is an automatic ankle cinching system associated with an ankle portion of an upper. 
     In another aspect, the at least one lighting device is disposed on an ankle strap of the automatic ankle cinching system. 
     In another aspect, the at least one lighting device is disposed on a side portion of the upper. 
     In another aspect, the at least one lighting device is disposed on a sole of the article of footwear. 
     In another aspect, the lighting system is configured to receive information from a pressure switch, the pressure switch being configured to depress when a foot is inserted into the upper. 
     In another aspect, the lighting system is disposed in the illuminated state when the pressure switch is depressed. 
     In another aspect, the lighting system is configured to receive information from a manual switch. 
     In another aspect, the lighting system is disposed in the illuminated state when the manual switch is engaged by a user. 
     In another aspect, the invention provides an article of footwear, comprising: an automatic fastening system configured to tighten a portion of an upper, the automatic fastening system including a tightened position and a loosened position; a lighting system comprising at least one lighting device, the lighting system in communication with the automatic fastening system; and where the at least one lighting device is configured to alert a user when the automatic fastening system is in the tightened position. 
     In another aspect, the at least one lighting device is illuminated in order to alert the user. 
     In another aspect, the automatic fastening system is an automatic ankle cinching system including an ankle strap. 
     In another aspect, the at least one lighting device is disposed on the ankle strap. 
     In another aspect, the at least one lighting device is oriented towards a forefoot of the article of footwear to increase visibility of the lighting device for the user. 
     Other systems, methods, features and advantages of the invention will be, or will become apparent to one with skill in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the following claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The invention can be better understood with reference to the following drawings and description. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention. Moreover, in the figures, like reference numerals designate corresponding parts throughout the different views. 
         FIG. 1  is an isometric view of an embodiment of an article of footwear with a lighting system; 
         FIG. 2  is a schematic view of an embodiment of components of a lighting system; 
         FIG. 3  is an isometric view of an embodiment of an article of footwear with a lighting system; 
         FIG. 4  is an isometric view of an embodiment of an article of footwear with a lighting system prior to insertion of a foot; 
         FIG. 5  is an isometric view of an embodiment of an article of footwear with a lighting system after insertion of a foot; 
         FIG. 6  is an isometric view of an embodiment of an article of footwear with a lighting system before a manual switch has been depressed; 
         FIG. 7  is an isometric view of an embodiment of an article of footwear with a lighting system after a manual switch has been depressed; 
         FIG. 8  is an isometric view of an embodiment of a footwear housing; 
         FIG. 9  is an isometric view of an embodiment of a footwear housing including a charging station; 
         FIG. 10  is an isometric view of an embodiment of a footwear housing in an open position; 
         FIG. 11  is an isometric view of an embodiment of a footwear housing receiving a pair of footwear; 
         FIG. 12  is an isometric view of an embodiment of a footwear housing receiving a pair of footwear; 
         FIG. 13  is a side cross sectional view of an embodiment of a footwear housing with an article of footwear; and 
         FIG. 14  is a top down view of an embodiment of a pair of footwear coupled with a charging station. 
     
    
    
     DETAILED DESCRIPTION 
       FIG. 1  is a preferred embodiment of article of footwear  100 , also referred to simply as article  100 , in the form of an athletic shoe. For clarity, the following detailed description discusses a preferred embodiment, however, it should be kept in mind that the present invention could also take the form of any other kind of footwear, including, for example, skates, boots, ski boots, snowboarding boots, cycling shoes, formal shoes, slippers or any other kind of footwear. 
     Article  100  preferably includes upper  102 . Upper  102  includes entry hole  105  that allows a foot to enter upper  102 . In some cases, upper  102  also includes an interior cavity that is configured to receive the foot. In particular, entry hole  105  preferably provides access to the interior cavity. 
     In some embodiments, upper  102  may be associated with sole  104 . In one embodiment, upper  102  is attached to sole  104 . In some cases, upper  102  is connected to sole  104  by stitching or an adhesive. In other cases, upper  102  could be integrally formed with sole  104 . 
     In some cases, sole  104  comprises a midsole. In some embodiments, sole  104  could also include an insole that is configured to contact a foot. In other embodiments, sole  104  could include an outsole that is configured to contact a ground surface. In an exemplary embodiment, sole  104  may comprise a midsole as well as an outsole and an insole. 
     Generally, sole  104  may be provided with provisions for increasing traction depending on the intended application of article of footwear  100 . In some embodiments, sole  104  may include a variety of tread patterns. In other embodiments, sole  104  may include one or more cleats. In still other embodiments, sole  104  could include both a tread pattern as well as a plurality of cleats. It should be understood that these provisions are optional. For example, in still another embodiment, sole  104  could have a generally smooth lower ground contacting surface. 
     Upper  102  may have any design. In some embodiments, upper  102  may have the appearance of a low top sneaker. In other embodiments, upper  102  may have the appearance of a high top sneaker. In this exemplary embodiment, upper  102  may include a high ankle portion  132 . In particular, upper  102  may include first extended portion  181  and second extended portion  182 . In this embodiment, first extended portion  181  and second extended portion  182  have generally triangular shapes. In other embodiments, first extended portion  181  and second extended portion  182  could have another shape. Examples of other shapes include, but are not limited to, rounded shapes, rectangular shapes, polygonal shapes, regular shapes as well as irregular shapes. Using this configuration for ankle portion  132  may help provide upper  102  with additional support for an ankle. 
     Article  100  may include provisions for tightening upper  102  around a foot. In some embodiments, article  100  may be associated with laces, straps and/or fasteners for tightening upper  102  once a foot has been inserted into upper  102 . In some cases, article  100  may include laces, straps and/or fasteners that can be manually adjusted by a user. In other cases, article  100  may include provisions for automatically adjusting laces, straps and/or other fasteners associated with upper  102 . By using automatically adjusting laces, straps and/or other fasteners, upper  102  may be tightened around a foot with a minimal amount of effort from a user. Examples of automatic lacing systems are disclosed in the automatic lacing system case. 
     In some embodiments, upper  102  may include individual tightening systems associated with different portions of upper  102 . In this exemplary embodiment, upper  102  may include automatic lacing system  122  that is associated with arch portion  130  of upper  102 . Likewise, upper  102  may include automatic ankle cinching system  124  that is associated with ankle portion  132  of upper  102 . As previously discussed, in an exemplary embodiment, automatic lacing system  122  and automatic ankle cinching system  124  may be configured to automatically tighten and/or loosen upper  102  around an arch of a foot and an ankle of a foot. In other cases, however, manual lacing systems and/or manual ankle cinching systems can be used. 
     Automatic lacing system  122  preferably includes a plurality of straps. The term strap as used throughout this detailed description and in the claims refers to any device that can be used for tightening a portion of an article of footwear to a foot. Generally, a strap could have any shape. In some embodiments, a strap could have a rectangular or ribbon-like shape. However, it should be understood that the term strap is not intended to be restricted to tightening devices with ribbon-like shapes. In other embodiments, for example, a strap could have a lace-like shape. In still other embodiments, automatic lacing system  122  could be associated with other types of fasteners. Examples of other fasteners that could be used with automatic lacing system  122  include, but are not limited to laces, cords and strings. 
     Additionally, a strap could be made of any material. Examples of materials that could be used include, but are not limited to, leather, natural fabric, synthetic fabric, metal, rubber, as well as other materials. In some embodiments, a strap could be any type of woven strap as well. In particular, a strap could be woven from any material known in the art for producing woven straps. 
     Generally, automatic lacing system  122  can include any number of straps. In some embodiments, only a single strap may be provided. In other embodiments, multiple straps may be provided. In this embodiment, automatic lacing system  122  includes four straps, including first strap  111 , second strap  112 , third strap  113  and fourth strap  114 . For clarity, first strap  111 , second strap  112 , third strap  113  and fourth strap  114  may be referred to collectively as strap set  115 . 
     In this embodiment, strap set  115  is disposed beneath lacing gap  107  of upper  102 . In some cases, strap set  115  may be configured to adjust the size of lacing gap  107 . As the size of lacing gap  107  is adjusted, the sidewall portions of upper  102  may move closer together or further apart. With this arrangement, as strap set  115  is adjusted, upper  102  can be opened and/or closed around the arch of a foot. 
     Generally, strap set  115  may be arranged in any direction on upper  102 . In some embodiments, strap set  115  could extend in a generally longitudinal direction. Preferably, strap set  115  may be arranged in a lateral direction with respect to upper  102 . The term “lateral direction” as used in this detailed description and in the claims refers to a direction extending from a medial side of upper  102  to a lateral side of upper  102 . In other words, the lateral direction preferably extends along the width of upper  102 . 
     Furthermore, strap set  115  may include any type of spacing between adjacent straps. In some embodiments, the spacing between adjacent straps could vary. In other embodiments, one or more straps may cross over, or intersect with, one another. In a preferred embodiment, the straps of strap set  115  may be substantially evenly spaced. In particular, the width between adjacent portions of two straps remains substantially constant. In other words, the straps may be approximately parallel at adjacent portions. 
     Although automatic lacing system  122  is configured to tighten and/or loosen upper  102  at arch portion  130  in the current embodiment, in other embodiments, automatic lacing system  122  could be associated with another portion of upper  102 . For example, in another embodiment, automatic lacing system  122  could be configured to tighten upper  102  at a side portion of upper  102 . Additionally, automatic lacing system  122  could be associated with a toe portion of upper  102 . In still another embodiment, automatic lacing system  122  could be associated with a heel portion of upper  102 . 
     In some embodiments, automatic lacing system  122  may include provisions for automatically moving strap set  115 . In some cases, automatic lacing system  122  may include a strap moving mechanism. The term “strap moving mechanism” as used throughout this detailed description and in the claims refers to any mechanism capable of providing motion to one or more straps without requiring work to be performed by the user. In other words, a strap moving mechanism allows straps to be automatically tightened and/or automatically loosened. Examples of strap moving mechanisms are disclosed in the automatic lacing system case. In some cases, a strap moving mechanism can comprise a motor configured to drive one or more straps of a strap set. For purposes of clarity, no strap moving mechanism is illustrated in this embodiment. However, in some cases, one or more components of a strap moving mechanism can be included with article  100 . 
     Automatic ankle cinching system  124  may include at least one ankle strap. In some embodiments, automatic ankle cinching system  124  may include multiple ankle straps. In this exemplary embodiment, automatic ankle cinching system  124  includes ankle strap  150 . Ankle strap  150  could be any type of strap, including any type of strap previously discussed with respect to the straps of automatic lacing system  122 . In some embodiments, ankle strap  150  could be a similar type of strap to the straps of strap set  115 . In other embodiments, ankle strap  150  could be a different type of strap from the straps of strap set  115 . 
     In some cases, automatic ankle cinching system  124  also includes provisions for receiving a portion of ankle strap  150 . In this embodiment, automatic ankle cinching system  124  includes housing  160  that is configured to receive a portion of ankle strap  150 . Housing  160  could be located anywhere on ankle portion  132  of upper  102 . In some cases, housing  160  could be disposed on a side of ankle portion  132 . In other cases, housing  160  could be disposed on at the front of ankle portion  132 . In one embodiment, housing  160  may be disposed on a rear portion of ankle portion  132 . 
     In some embodiments, automatic ankle cinching system  124  may include provisions for automatically moving ankle strap  150  between a tightened and loosened position. In some cases, automatic ankle cinching system may include a strap moving mechanism. The term “strap moving mechanism” as used throughout this detailed description and in the claims refers to any mechanism capable of providing motion to one or more straps without requiring work to be performed by the user. In other words, a strap moving mechanism allows straps to be automatically tightened and/or automatically loosened. Examples of strap moving mechanisms are disclosed in the automatic lacing system case. In some cases, a strap moving mechanism for an ankle strap can comprise a spring coil that is configured to automatically tighten the ankle strap, as discussed in the automatic lacing system case. For purposes of clarity, no strap moving mechanism for automatic ankle cinching system  124  is illustrated in this embodiment. However, in some cases, one or more components of a strap moving mechanism for an ankle cinching system can be included with article  100 . 
     An article of footwear may include provisions for illuminating one or more portions of an article. In some cases, portions of an article may be illuminated for decorative purposes. In other cases, portions of an article may be illuminated for purposes of increased safety by facilitating greater visibility of an article during nighttime or low light conditions. In still other cases, portions of an article can be illuminated to signal the activation of one or more automated systems, such as an automatic lacing system. 
     Referring to  FIG. 1 , article  100  may include lighting system  200 . Lighting system  200  may comprise a plurality of lighting devices. The term “lighting device” as used throughout this detailed description and in the claims refers to any device configured for illumination. In different embodiments, different types of lighting devices can be used including, but not limited to, incandescent bulbs, light emitting diodes (LEDs), florescent lights, high intensity discharge lamps, as well as other types of devices. In some cases, each lighting device may be associated with an illuminated state, also referred to as an “on” state of the device, and a non-illuminated state, also referred to as an “off” state of the device. 
     In different embodiments, the number of lighting devices comprising lighting system  200  can vary. In some cases, lighting system  200  may comprise a single lighting device. In other cases, lighting system  200  can comprise two or more lighting devices. In one embodiment, lighting system  200  comprises three lighting devices, including first lighting device  202 , second lighting device  204  and third lighting device  206 . Although the current embodiment first lighting device  202  and second lighting device  204  are disposed on a lateral portion of article  100 , in other embodiments article  100  could include additional lighting devices disposed on a medial portion of article  100 . 
     Generally, first lighting device  202  can be disposed on any portion of article  100 . In some cases, first lighting device  202  may be disposed on heel portion  210  of sole  104 . In particular, first lighting device  202  may be disposed on a peripheral edge of heel portion  210 . With this arrangement, first lighting device  202  may illuminate a portion of sole  104 . In other cases, first lighting device  202  may be disposed on another portion of article  100 . 
     First lighting device  202  can comprise one or more distinct lighting portions. In some embodiments, first lighting device  202  includes first light emitting portion  222  and second light emitting portion  224 . In one embodiment, first light emitting portion  222  and second light emitting portion  224  can have curved shapes. In particular, first light emitting portion  222  and second light emitting portion  224  can be approximately tear drop shaped. In other embodiments, however, first light emitting portion  222  and second light emitting portion  224  can have any other type of shape, including, but not limited to, circular shapes, elliptical shapes, rectangular shapes, regular polygonal shapes as well as irregular shapes. 
     First lighting  202  device can be any type of lighting device. In some cases, first lighting device  202  can be a LED type lighting device. In other cases, first lighting device  202  can be another type of lighting device, such as an electroluminescent panel (ELP). By using an ELP lighting device, first lighting device  202  can provide illumination to sole  104  without excessive power consumption or heating. 
     Generally, second lighting device  204  may be disposed on any portion of article  100 . In some cases, second lighting device  204  may be disposed on a lateral portion of upper  102 . In particular, second lighting device  204  may be disposed above heel portion  210  of sole  104 . In other cases, second lighting device  204  may be disposed on another portion of article  100 . 
     Second lighting device  204  may be any type of lighting device. In some cases, second lighting device  204  may comprise a plurality of bulbs  230 . Furthermore, plurality of bulbs  230  may comprise distinct LED bulbs. In one embodiment, second lighting device  204  comprises three distinct rows of LED bulbs. In some cases, each distinct row of plurality of bulbs  230  may be associated with three distinct colors. In other cases, plurality of bulbs  230  can comprise a single color. 
     Generally, third lighting device  206  may be disposed on any portion of article  100 . In some cases, third lighting device  206  may be disposed on ankle strap  150 . In particular, third lighting device  206  may be disposed over lacing gap  107  when ankle strap  150  is in a closed or tightened position. With this arrangement, third lighting device  206  may be oriented in a direction towards a forefoot of article  100 . Furthermore, this arrangement increases the visibility of third lighting device  206  since a user can simply look down at the front of an article to see third lighting device  206 . 
     Third lighting device  206  may be any type of lighting device. In some cases, third lighting device  206  may be a LED type device. In other cases, third lighting device  206  can comprise any other type of lighting device. In one embodiment, third lighting device  206  may include an indicia of some kind. Examples of indicia that could be used include graphics, text, numbers or other types of indicia. In this exemplary embodiment, third lighting device  206  comprises logo  250 . This arrangement allows a manufacturer to decorate article  100  using a logo or some other type of indicia. In an alternative embodiment, for example, third lighting device  206  may include the numbers of players on a sports team. 
     Article  100  may include provisions for operating one or more lighting devices. In some cases, lighting system  200  can include components for powering one or more lighting devices. In other cases, lighting system  200  can include components for controlling the illumination of one or more lighting devices. In an exemplary embodiment, lighting system  200  can include components for powering and controlling one or more lighting devices. 
       FIG. 2  illustrates a schematic view of an embodiment of lighting system  200 .  FIG. 3  illustrates an isometric view of article  100  including lighting system  200 . For purposes of clarity, article  100  is shown in phantom in  FIG. 3  to illustrate the locations of various components of lighting system  200 . Referring to  FIGS. 2 and 3 , lighting system  200  may include lighting electrical control unit  240 , hereby referred to as lighting ECU  240 . Generally, lighting ECU  240  may be any type of ECU. For example, in some embodiments, an ECU could be a central processing unit (CPU) of some kind. In other embodiments, an ECU could be a simple circuit of some kind for receiving electrical inputs and providing an electrical output according to the inputs. In one embodiment, lighting ECU  240  may be a printed circuit board. 
     Lighting ECU  240  may include a number of ports that facilitate the input and output of information and power. The term “port” means any interface or shared boundary between two conductors. In some cases, ports can facilitate the insertion and removal of conductors. Examples of these types of ports include mechanical connectors. In other cases, ports are interfaces that generally do not provide easy insertion or removal. Examples of these types of ports include soldering or electron traces on circuit boards. 
     All of the following ports and provisions associated with lighting ECU  240  are optional. Some embodiments may include a given port or provision, while others may exclude it. The following description discloses many of the possible parts and provisions that can be used, however, it should be kept in mind that not every part or provision must be used or included in a given embodiment. 
     Referring to  FIG. 2 , lighting ECU  240  can include provisions for transferring information and/or power with one or more lighting devices. In some cases, lighting ECU  240  can include first lighting device port  241 , second lighting device port  242  and third lighting port  243  that are configured to transfer information and/or power to first lighting device  202 , second lighting device  204  and third lighting device  206 , respectively. With this arrangement, lighting ECU  240  can control the operation of first lighting device  202 , second lighting device  204  and third lighting device  206 . In particular, lighting ECU  240  can turn each lighting device on or off, as well as provide power for operating each lighting device. 
     Lighting ECU  240  can also include provisions for switching one or more lighting devices between an illuminated state and a non-illuminated state. In other words, lighting ECU  240  can include provisions for turning each lighting device on or off. In some embodiments, lighting ECU  240  can include provisions for manually operating one or more lighting devices. In other embodiments, lighting ECU  240  can include provisions for automatically operating one or more lighting devices. In still other embodiments, lighting ECU  240  can simultaneously include both manual and automatic provisions for operating one or more lighting devices. 
     In one embodiment, lighting ECU  240  can include manual switch port  260  that is configured to transfer and/or receive information from manual switch  262 . Also, lighting ECU  240  can include pressure switch port  264  that is configured to transfer and/or receive information from pressure switch  266 . Using manual switch  262  and/or pressure switch  266  allows for direct control of lighting system  200 . Although the current embodiment includes two switches, in other embodiments, only a single switch may be used. In still other embodiments, no switches may be used. In still other embodiments, more than two switches may be used. 
     In some cases, one or more devices may be connected to lighting ECU  240  via removable connectors. For example, in one embodiment, a circuit connecting third lighting device  206  with third lighting device port  243  can include first plug  284  and first connector  283 . In some cases, first plug  284  may be a 2 pin plug. Likewise, in some cases, first connector  283  may be a 2 pin connector. With this arrangement, third lighting device  206  can easily be attached and/or detached from lighting ECU  240 . This allows a manufacturer to easily interchange third lighting device  206 , which may contain logos or other types of indicia. 
     In one embodiment, a circuit connecting pressure switch  266  and lighting ECU  240  may include second plug  281  and second connector  282 . In some cases, second plug  281  can be a 2 pin plug. Also, in some cases, second connector  282  can be a 2 pin connector. With this arrangement, pressure switch  266  can easily be attached and/or detached from lighting ECU  240 . This allows a manufacturer to easily add or remove a pressure switch as an option for operating lighting system  200 . 
     It should be understood that the use of removable connectors is optional. Although the current embodiment includes two circuits comprising plugs and connectors, in other embodiments, any devices attached to lighting ECU  240  can comprise one or more removable connectors. In other embodiments, none of the circuits may include removable connectors. 
     In embodiments where an article includes an automatic fastening system for adjusting laces, straps, or other fastening devices, a lighting system can include provisions for communicating with the automatic fastening system. In some cases, an automatic fastening system can comprise an automatic lacing system. In other cases, an automatic fastening system can comprise an automatic ankle cinching system. In still other cases, an automatic fastening system can include both an automatic lacing system and an automatic ankle cinching system. 
     In one embodiment, lighting ECU  240  can include fastening system port  290  that is configured to transfer and/or receive information automatic fastening system  291 . With this arrangement, lighting ECU  240  can communicate with an automatic fastening system. For example, in some cases, a lighting system can be configured to turn on one or more lighting devices once an automatic fastening system has tightened an article to the foot of a user. Likewise, in some cases, a lighting system can be configured to turn off one or more lighting devices once an automatic fastening system has been loosened. It will be understood that automatic fastening system  291  is optional and may not be included in some embodiments. 
     An article with a lighting system can also include provisions for powering the lighting system. Generally, lighting system  200  may be associated with an electrical power source of some kind. In some cases, lighting system  200  could be associated with an external battery. In still other cases, lighting system  200  could include an internal battery. In an exemplary embodiment, lighting system  200  may be configured to receive power from internal battery  286 . Battery  286  could be any type of battery. In some embodiments, battery  286  could be a disposable battery. Examples of different types of disposable batteries include, but are not limited to, zinc-carbon, zinc-chloride, alkaline, silver-oxide, lithium disulfide, lithium-thionyl chloride, mercury, zinc-air, thermal, water-activated, nickel oxyhydroxide, and paper batteries. In this exemplary embodiment, battery  286  could be a rechargeable battery of some kind. Examples of rechargeable batteries include, but are not limited to nickel-cadmium, nickel-metal hydride and rechargeable alkaline batteries. 
     In embodiments including a rechargeable battery, a lighting system can include provisions for charging the battery. In one embodiment, lighting system  200  may include charging electrical control unit  294 , hereby referred to as charging ECU  294 . Generally, charging ECU  294  may be any type of ECU. For example, in some embodiments, an ECU could be a central processing unit (CPU) of some kind. In other embodiments, an ECU could be a simple circuit of some kind for receiving electrical inputs and providing an electrical output according to the inputs. In one embodiment, charging ECU  294  may be a printed circuit board. 
     Charging ECU  294  may include a number of ports that facilitate the input and output of information and power. The term “port” means any interface or shared boundary between two conductors. In some cases, ports can facilitate the insertion and removal of conductors. Examples of these types of ports include mechanical connectors. In other cases, ports are interfaces that generally do not provide easy insertion or removal. Examples of these types of ports include soldering or electron traces on circuit boards. 
     In some embodiments, charging ECU  294  can include battery port  296  that is configured to transfer power to and from battery  286 . Additionally, charging ECU  294  can include charging port  298  that is configured to transfer power to and from a charging device. Any known charging device in the art could be used. Examples of different types of charging devices include, but are not limited to, simple chargers, trickle chargers, timer-based chargers, intelligent chargers, fast chargers, pulse chargers, USB-type chargers, inductive chargers, as well as other types of charging devices. In an exemplary embodiment, an article of footwear can be associated with an inductive charging system. Since articles of footwear are typically worn in various conditions, including wet conditions, this inductive charging arrangement can help protect the charging circuit from exposure to the elements. In particular, because inductive charging systems do not require exposed electrodes, this arrangement can help prevent short circuiting and/or rusting that might otherwise occur with exposure to water. 
     In this exemplary embodiment, charging port  298  can be connected to internal charging coil  299 . In some cases, internal charging coil  299  may be part of a pair of inductive charging coils. Using an external charging coil, which may be attached to a power source such as a wall socket, the two coils can be coupled to transfer power, via induction, to battery  286 . Details of one embodiment of an induction charging system are discussed later in the detailed description. 
     In one embodiment, charging ECU  294  can also be connected to lighting ECU  240  using first ECU port  295  and second ECU port  297 . In some cases, first ECU port  295  and second ECU port  297  can be used to transfer power and/or information between charging ECU  294  and lighting ECU  240 . Although the current embodiment includes two different ECUs for a lighting system and for a charging system, other embodiments may only include a single ECU. For example, in another exemplary embodiment, charging ECU  294  and lighting ECU  240  can be combined into a single ECU that controls a charging system and a lighting system of an article of footwear. 
     In different embodiments, the location of one or more ECUs can vary. In the exemplary embodiment, charging ECU  294  and lighting ECU  240  are disposed in sole  104 . In other embodiments, however, charging ECU  294  and lighting ECU  240  could be disposed in another portion of article  100 . For example, in another exemplary embodiment, charging ECU  294  and/or lighting ECU  240  could be disposed in housing  160 , which is disposed in ankle portion  132  of upper  102 . 
     In different embodiments, the locations of various components comprising a lighting system can vary. In some cases, some components can be disposed in an upper of an article. In other cases, some components can be disposed in a sole of an article. In an exemplary embodiment, some of the components of a lighting system are disposed on an upper and some of the components are disposed on a sole. 
       FIG. 3  illustrates an exemplary embodiment of article  100 , including some of the components of lighting system  200 . For purposes of clarity, each of the components of lighting system  200  is shown schematically. Also, article  100  is shown in phantom in order to reveal the internal structure of article  100 . Furthermore, the locations of the components shown in this embodiment are only intended to be exemplary. In other embodiments, the locations of one or more components can be changed. Also, the orientations of each component can vary from one embodiment to another. 
     As previously discussed, in some embodiments, first lighting device  202  can be disposed on sole  104 . Additionally, second lighting device  204  and third lighting device  206  can be disposed on upper  102 . In particular, third lighting device  206  can be disposed on ankle strap  150  of upper  102 . Furthermore, in some cases, manual switch  262  can be disposed on upper  102 . In one embodiment, manual switch  262  may be disposed on an ankle region of upper  102 . Generally, however, the locations of one or more of these components can vary. In other embodiments, manual switch  262  can be disposed on any other portion of upper  102  or of sole  104 . For example, in another embodiment, manual switch  262  could be disposed on the heel of upper  102 . 
     In some embodiments, an article can include provisions for protecting one or more components of a lighting system from direct exposure to the elements. Additionally, an article can include provisions for reducing direct contact between the components of a lighting system and a foot. 
     Referring to  FIG. 3 , the internal components of lighting system  200  are clearly visible within article  100 . In some embodiments, one or more components of lighting system  200  can be disposed within sole  104 . In one embodiment, lighting ECU  240 , charging ECU  294 , battery  286 , and internal charging coil  298  are disposed within sole  104 . In some cases, sole  104  may be a hollow sole with a large internal cavity configured to receive a plurality of components. In other cases, sole  104  can be configured with one or more cavities or recesses that correspond to each individual component. In still other cases, a plurality of components of lighting system  200  could be embedded in a matrix material disposed within a larger cavity of sole  104 . For example, an internal cavity of sole  104  could be filled with foam that surrounds each of the various components. 
     The current embodiment illustrates various components of lighting system  200  arranged in a substantially similar plane of sole  104 . In other embodiments, however, one or more components could be stacked in a substantially vertical direction within sole  104 . For example, in another exemplary embodiment lighting ECU  240  can be stacked over charging ECU  294  in a substantially vertical direction to provide a more compact arrangement within sole  104 . 
     In different embodiments, the location of pressure switch  266  can vary. In some cases, pressure switch  266  can be disposed on a portion of upper  102 . In other cases, pressure switch  266  can be disposed in a portion of sole  104 . In an exemplary embodiment, pressure switch  266  can be disposed on a top surface of sole  104 . In particular, button  267  can be configured to extend outwards from top surface  105  of sole  104 . In some cases, pressure switch  266  can be disposed within a forefoot portion of sole  104 . In other cases, pressure switch  266  can be disposed in an arch portion or a heel portion of sole  104 . With this arrangement, button  267  can be depressed as a foot is inserted into article  100 . 
     For purposes of clarity, article  100  is shown in the current embodiment without an insole. In some embodiments, however, article  100  can include an insole disposed between upper  102  and sole  104 . In some cases, the insole can rest on top surface  105  of sole  104 . In embodiments including a pressure switch, the insole may rest over the pressure switch. In these embodiments, as a foot is inserted into upper  102 , the insole may be pushed downwards, which may cause the pressure switch to depress. 
     Lighting system  200  can include provisions for protecting wires used to connect components disposed on upper  102  with components disposed on sole  104 . In one embodiment, third lighting device  206  can be connected to lighting ECU  240  via first wire  301 . In some cases, first wire  301  may further comprise first end portion  311  that extends through a portion of ankle strap  150 . In particular, first end portion  311  may be threaded through a portion of ankle strap  150 . Additionally, first wire  301  may comprise second end portion  312  that extends through a portion of upper  102 . In particular, second end portion  312  may be threaded through a portion of upper  102 . In some cases, for example, second end portion  312  can be disposed between an inner and outer lining of upper  102 . Finally, first wire  301  may comprise intermediate portion  313 , which extends between first end portion  311  and second end portion  312 . In some embodiments, intermediate portion  313  may be disposed in a portion of housing  160 . With this arrangement, first wire  301  can be protected from the elements as well as from contact with a foot and/or external objects. 
     In some embodiments, first wire  301  may be configured to move with ankle strap  150 . In some cases, first wire  301  may comprise a substantially flexible material that can be stretched and/or contracted as third lighting device  206  moves with ankle strap  150 . In other cases, first wire  301  may be configured with some slack to allow for motion of third lighting device  206 . 
     In a similar manner, the remaining components of lighting system  200  can also be connected via one or more wires. In particular, one or more components may be connected to lighting ECU by connecting wires to the various ports of ECU  240  that have been previously discussed, and which are illustrated in  FIG. 2 . For example, second lighting component  204  can be connected to lighting ECU  240  via second wire  302 . In some cases, second wire  302  can be embedded in a lining of upper  102 . Also, manual switch  266  can be connected to lighting ECU  240  via third wire  303 . In some cases, third wire  303  can be embedded in a lining of upper  102 . This arrangement helps provide protection for second wire  302  and third wire  303 . 
     For purposes of illustration, the components of lighting system  200  are shown with a particular size in this embodiment. In other embodiments, however, the size of each component can vary. For example, in some cases, the size of battery  286  may vary. In some embodiments, battery  286  could have a length in the range of 10 mm to 50 mm. Furthermore, battery  286  could have a width in the range of 10 mm to 50 mm. In an exemplary embodiment, battery  286  has a width of about 30 mm. Furthermore, battery  286  preferably has a length of about 40 mm. In a similar manner, the sizes of other components of lighting system  200  can vary from one embodiment to another. 
     Although the current embodiment includes an inductive charging system, other embodiments could include a plug-in type charging system. For example, in one embodiment a USB-based charger may be used. In particular, article  100  can include a charging port that is electrically connected with a battery via an electrical circuit of some kind. Furthermore, the charging port may be configured to connect to an external battery charger of some kind. In still another embodiment, a charging system could be configured with both a physical charging port and an inductive loop that allows the system to operate in a plug-in type charging mode or an inductive-type charging mode. 
       FIGS. 4 through 8  are intended to illustrate embodiments of article  100 , including lighting system  200 . As previously discussed, in some embodiments, lighting system  200  may be operated using a manual switch and/or a pressure switch. Referring to  FIGS. 4 and 5 , article  100  can be operated using a pressure switch in some embodiments. Initially, as seen in  FIG. 4 , foot  402  may be disposed outside of article  100 . At this point, pressure switch  266  may be in an “off” position. In particular, button  267  is fully extended above a top surface of sole  104 . With pressure switch  266  in this off position, lighting system  200  may be deactivated. In particular, first lighting device  202 , second lighting device  204  and third lighting device  206  may be in a non-illuminate state. 
     Referring to  FIG. 5 , as foot  402  is inserted into article  100 , forefoot  404  may be disposed against button  267 . In some cases, button  267  may be depressed under the pressure of forefoot  404 . As button  267  is depressed, pressure switch  266  may be disposed in an “on” position that is associated with the activation of lighting system  200 . In particular, with pressure switch  266  depressed, first lighting device  202 , second lighting device  204  and third lighting device  206  may be in an illuminated state. 
     As previously discussed, in some cases, a lighting system can be in communication with an automatic fastening system. In some embodiments, one or more lighting devices may be controlled according to the operating conditions of an automatic fastening system. In some cases, one or more lighting devices may be configured in a non-illuminated state when an automatic fastening system is disposed in a loosened position. Additionally, in some cases, one or more lighting devices may be configured in an illuminated state when an automatic fastening system is disposed in a tightened position. 
     For example, in this exemplary embodiment, when pressure switch  266  is not depressed, automatic lacing system  122  and automatic ankle cinching system  124  may be in a loosened position, as seen in  FIG. 4 . As previously discussed, lighting system  200  may be disposed in a non-illuminated state when pressure switch  266  is not depressed. Furthermore, as pressure switch  266  is depressed, automatic lacing system  122  and automatic ankle cinching system  124  may move from a loosened position to a tightened position, as seen in  FIGS. 4 and 5 . As previously discussed, lighting system  200  is operated in an illuminated position when pressure switch  266  is depressed. In other words, this arrangement couples the operation of lighting system  200  with automatic lacing system  122  and automatic ankle cinching system  124 . 
     With this arrangement, lighting system  200  can be used to indicate when one or more automatic fastening systems have been activated. For example, in this exemplary embodiment a user can be made aware that automatic lacing system  122  and automatic ankle cinching system  124  have been activated by observing the illumination from first lighting device  202 , second lighting device  204  and/or third lighting device  206 . This arrangement can be useful in situations where the tightening of one or more automatic fastening systems is not easily observed by a user. 
     In different embodiments, the coupling of a lighting system and an automatic fastening system can be achieved in various ways. In some cases, the lighting system may send control signals to the automatic fastening system so that the two systems operate in a cooperative manner. In other cases, each system may be independently in communication with a switch, such as a pressure switch. In such cases, as the pressure switch is depressed, each system receives information from the pressure switch independently. 
     It should be understood that in other embodiments, a lighting system may not be coupled with an automatic fastening system. In other words, in some embodiments, a lighting system and a fastening system may operated independently of one another. In still other embodiments, the coupling of a lighting system with an automatic fastening system could be reversed from the current embodiment. In other words, in some other embodiments, a lighting system could be configured to operate in an illuminated state when an automatic fastening system is in a loosened position and the lighting system could be configured to operate in a non-illuminated state when the automatic fastening system is in a tightened position. 
     It should be understood than in still another embodiment, an article can be provided with a lighting system but not an automatic fastening system. In other words, in some cases the automatic fastening system may be optional. Likewise, in other cases, the lighting system may be optional. 
     For purposes of clarity, the current embodiment includes only pressure switch  266  and does not include a manual switch. In some embodiments, however, article  100  can include both a pressure switch and a manual switch. In such embodiments, a manual switch can be used to override signals transmitted using a pressure switch. In other words, in some embodiments, a manual switch could be used to deactivate an illumination system even when a foot is inserted and a pressure switch is fully depressed. Likewise, in some embodiments, a manual switch could be used to activate an illumination system even when a foot is not inserted and a pressure switch is not depressed. 
     Referring to  FIGS. 6 and 7 , article  100  can be operated using manual switch  262 . Initially, as seen in  FIG. 6 , foot  602  can be disposed within article  100 . At this point, manual switch  262  may be disposed in an “off” position. In other words, lighting system  200  is deactivated so that first lighting device  202 , second lighting device  204  and third lighting device  206  are not illuminated. Referring to  FIG. 7 , user  704  may engage manual switch  262  so that manual switch  262  is disposed in an “on” position. At this point, lighting system  200  may be activated. In particular, first lighting device  202 , second lighting device  204  and third lighting device  206  may be illuminated. With this arrangement, a user can have control over when lighting system  200  is activated or deactivated. 
     In one embodiment, a manual switch may be a button that can be depressed. In other embodiments, however, any type of user controlled device can be used. The term “user controlled device” refers to any device that is configured to receive input directly from a user. Examples of other user controlled devices that may be used include but are not limited to, levers, switches, dials, consoles or other user controlled devices. 
     In embodiments including one or more automatic fastening systems, manual switch  262  can be used to control lighting system  200  independently of the automatic fastening systems. In other embodiments, however, one or more automatic fastening systems could be simultaneously controlled using manual switch  262 . For example, in one embodiment, automatic lacing system  122  and automatic ankle cinching system  124  can be configured to tighten and/or loosen strap set  115  and ankle strap  150 , respectively, when manual switch  266  is depressed. With this arrangement, a user can control both a lighting system and an automatic fastening system using a manual switch. 
     Although the embodiments discussed here include a pressure switch and a manual switch, other embodiments could include any other types of switches or sensors that could be used with a lighting system. Examples of different types of sensors that may be used include, but are not limited to, weight sensors, light sensors, audio sensors, heat sensors, voice activated sensors as well as other types of sensors. For example, in an alternative embodiment, a lighting system could be configured to receive information from a heat sensor. In this case, as a foot is inserted into an upper, the heat sensor may transmit information to the lighting system to illuminate one or more lighting devices. 
     In some embodiments, a pair of footwear can be associated with a housing for storing the articles of footwear. In embodiments including a charging system, the housing can include provisions for charging. In particular, in embodiments including an inductive charging system, the housing can provide components of the inductive charging system that allow power to be transferred from an external power source to the articles of footwear. 
       FIGS. 8 through 12  illustrate footwear housing  800  for a pair of footwear. For purposes of clarity, footwear housing  800  is illustrated with a particular design. In particular, footwear housing  800  is illustrated as a footwear bag which resembles a traditional duffle-type bag. Additionally, footwear housing  800  has a size that is configured to fit a single pair of footwear. In other embodiments, however, footwear housing  800  could have any other design. In particular, footwear housing  800  could have another shape and/or size in other embodiments. Examples of other designs for a footwear housing include, but are not limited to, any type of bags and/or back packs. Furthermore, the footwear housing could including any provisions for carrying the housing, including any type of strap or handle. 
     Referring to  FIG. 8 , footwear housing  800  includes base portion  801 . Furthermore, footwear housing  800  may include first panel  802  and second panel  804 . In some cases, first panel  802  and second panel  804  may be movable panels that are configured to open in order to provide access to the interior of footwear housing  800 . In one embodiment, first panel  802  and second panel  804  may be adjusted using handle  808 . In some embodiments, handle  808  can include provisions for temporarily locking first panel  802  and second panel  804  in a closed position. 
     In some embodiments, footwear housing  800  can include provisions for indicating the status of a charging system associated with footwear housing  800 . In some cases, footwear housing  800  can include a visual indicator, such as a light, for indicating the charging status. In other cases, footwear housing  800  can include a sound-based indicator, such as a speaker configured to produce a sound to indicate the charging status. In this exemplary embodiment, footwear housing  800  can include charging indicator light  899 . In particular, charging indicator light  899  may be an LED light that is lit to indicate the charging status of an article of footwear. 
     Referring to  FIG. 9 , footwear housing  800  may include interior portion  900  that is configured to receive one or more articles of footwear. In some embodiments, footwear housing  800  also includes floor portion  902  that provides a floor for interior portion  900 . In some cases, floor portion  902  may be rounded. In other cases, floor portion  902  may be substantially flat. With this arrangement, articles placed within footwear housing  800  may rest upon floor portion  902  in a stable manner. 
     Footwear housing  800  can include one or more components of a charging system. In one embodiment, footwear housing  800  can include charging station  906 . In some cases, charging station  906  may include provisions for transferring power to one or more articles of footwear. 
     In some embodiments, charging station  906  can include charging station ECU  908 . Generally, charging station ECU may be any type of ECU. For example, in some embodiments, an ECU could be a central processing unit (CPU) of some kind. In other embodiments, an ECU could be a simple circuit of some kind for receiving electrical inputs and providing an electrical output according to the inputs. In one embodiment, charging station ECU  908  may be a printed circuit board. 
     Charging station ECU  908  may include a number of ports that facilitate the input and output of information and power. The term “port” means any interface or shared boundary between two conductors. In some cases, ports can facilitate the insertion and removal of conductors. Examples of these types of ports include mechanical connectors. In other cases, ports are interfaces that generally do not provide easy insertion or removal. Examples of these types of ports include soldering or electron traces on circuit boards. 
     In one embodiment, charging station ECU  908  can include first port  910  that is configured to transfer power to first external inductive loop  912 . Likewise, in some cases, charging station ECU  908  can include second port  911  that is configured to transfer power to second external inductive loop  914 . In some cases, each external inductive loop may be associated with an internal inductive loop of a corresponding article of footwear. 
     Charging station  906  can also include provisions for receiving power from an external power source of some kind. In some embodiments, charging station ECU  908  can include third port  913  that is configured to receive power from an external power source. For example, in an exemplary embodiment, third port  913  can be associated with power cord  916  that can be plugged into a wall socket. 
     Referring to  FIG. 10 , first panel  802  and second panel  804  of footwear housing  800  have been opened to reveal interior portion  900 . As seen in  FIG. 10 , components of charging station  906  may be disposed below floor portion  902 . With this arrangement, the components of charging station  906  can be protected from the elements and from various types of contact with one or more articles of footwear. In other embodiments, however, one or more portions of charging station  906  may be exposed within interior portion  900 . 
     In this exemplary embodiment, footwear pair  1000  is inserted into footwear housing  800 , as seen in  FIGS. 10 and 11 . Footwear pair  1000  may comprise first article  1002  and second article  1004 . In some cases, floor portion  902  can include one or more locating features to facilitate alignment of footwear pair  1000  with charging station  906 . In particular, in embodiments using an inductive charging system, it may be necessary to ensure proper alignment of internal inductive loops disposed within each article with external inductive loops disposed in footwear housing  800 . 
     In this embodiment, floor portion  902  includes first recessed portion  1010  and second recessed portion  1012  that correspond with first article  1002  and second article  1004 , respectively. In some cases, first recessed portion  1010  and second recessed portion  1012  may be shaped to fit the bottom surfaces of first article  1002  and second article  1004 , respectively. This arrangement can help ensure proper alignment between footwear pair  1000  and charging station  906 , which can facilitate efficient charging. 
     It should be understood that in other embodiments, other types of locating features may be used. For example, in some cases, floor portion  902  can be configured with recesses that engage protrusions located on bottom surfaces of first article  1002  and second article  1004 . In other cases, floor portion  902  can be configured with protrusions that engage recesses located on bottom surfaces of first article  1002  and second article  1004 . In still other embodiments, other types of locating features that are known in the art can be used. 
       FIGS. 12 and 13  illustrate additional embodiments of provisions for ensuring proper alignment between a pair of footwear and a charging station. Referring to  FIG. 12 , footwear housing  800  can include adjustable bindings  1300 . In particular, adjustable bindings  1300  may include first adjustable binding  1302  and second adjustable binding  1304 . In some cases, first adjustable binding  1302  includes toe member  1310  and heel member  1312 . 
     Heel member  1312  may be fixed in place with respect to floor portion  902 . In contrast, toe member  1310  may be configured to slide in a longitudinal direction with respect to floor portion  902 . In this exemplary embodiment, heel portion  1320  of first article  1322  may confront heel member  1312 . Furthermore, toe member  1310  may be adjusted to confront toe portion  1323 . With this arrangement, toe member  1310  and heel member  1312  may help maintain first article  1322  in a predetermined location with respect to floor portion  902 . In particular, first article  1322  may be positioned in a manner that orients internal inductive loop  1340  of first article  1322  with external inductive loop  1342  of a charging system. In a similar manner, second adjustable binding  1304  may be used to locate and fix second article  1324 . 
     Referring to  FIG. 13 , some embodiments may include one or more locating features. In this embodiment, article  1360  may include first locating recess  1361  and second locating recess  1362 . Likewise, floor portion  902  may include first locating protrusion  1371  and second locating protrusion  1372 . First locating recess  1361  may be configured to receive first locating protrusion  1371 , while second locating recess  1362  may be configured to receive second locating protrusion  1372 . With this arrangement, article  1362  can be located and oriented in a manner that ensures proper alignment between internal inductive loop  1381 of article  1360  and external inductive loop  1382  of a charging system. In some cases, floor portion  902  may include additional locating protrusions configured to insert into recesses in a second article of footwear to facilitate charging of a pair of footwear. 
     Although the current embodiment includes an external inductive loop disposed in a floor portion of a footwear housing, other embodiments can include external inductive loops disposed in other portions of the footwear housing. In other cases, for example, one or more external inductive loops can be disposed on interior side walls of the footwear housing. Furthermore, while the current embodiment includes internal inductive loops disposed in a sole of an article of footwear, in other embodiments an internal inductive loop could be disposed in any other portion of an article of footwear. Examples of other portions that could house an internal inductive loop include, but are not limited to, a tongue, an upper sidewall, a forefoot portion of an upper, a heel portion of an upper, as well as any other portion of an article of footwear. In some embodiments, the location of an internal inductive loop in an article of footwear can be selected according to the location of an external inductive loop in a footwear housing so that the internal inductive loop can be disposed adjacent to the external inductive loop when the article is inserted into the footwear housing. 
       FIG. 14  illustrates a top down view of footwear housing  800  with footwear pair  1000  inserted. Referring to  FIG. 14 , first internal inductive loop  1202  of first article  1002  may be aligned with first external inductive loop  912 . Likewise, second internal inductive loop  1204  of second article  1004  may be aligned with second external inductive loop  914 . With this arrangement, power can be efficiently transferred from footwear housing  800  to footwear pair  1000 . 
     In some embodiments, electricity received at an external power source can be transferred to charging station ECU  908  via power cord  916 . The electricity can then be transferred to first external inductive loop  912 . By using an external power source with an alternating current, power can be inductively transferred between first external inductive loop  912  and first internal inductive loop  1202 . In particular, an alternating magnetic field can be created at first external inductive loop  912 , which induces a current in first internal inductive loop  1202 . This arrangement allows power to be transferred to a rechargeable power source, such as a battery, disposed within first article  1002 , which can provide power for a lighting system and/or an automatic fastening system. 
     In a similar manner, electricity received at charging station ECU  908  can be transferred to second external inductive loop  914 . By using an external power source with an alternating current, power can be inductively transferred between second external inductive loop  914  and second internal inductive loop  1204 . In particular, an alternating magnetic field can be created at second external inductive loop  914 , which induces a current in second internal inductive loop  1204 . This arrangement allows power to be transferred to a rechargeable power source, such as a battery, disposed within second article  1004 , which can provide power for a lighting system and/or an automatic fastening system. 
     It will be understood that the charging system discussed in this detailed description and in the claims can be used independently of a lighting system. In particular, since the charging system discussed in this detailed description is used to charge a battery of some kind, that battery can be further coupled to one or more different electrical systems. Generally, the charging system discussed in this detailed description and in the claims may be used to power any type of electrical system associated with an article of footwear. For example, in another embodiment, the charging system discussed in this embodiment could be used to charge a battery to power an accelerometer for tracking distance and motion. In still another embodiment, the charging system discussed here could be used to power a heating and/or cooling system for an article. Furthermore, it will be understood that the charging system could be used to power two or more electrical systems simultaneously. 
     While various embodiments of the invention have been described, the description is intended to be exemplary, rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible that are within the scope of the invention. Accordingly, the invention is not to be restricted except in light of the attached claims and their equivalents. Also, various modifications and changes may be made within the scope of the attached claims.