Abstract:
A wallet consolidator to warehouse information pertaining to at least one card and to retrieve the warehoused information to facilitate a transaction is provided. An embodiment of a wallet consolidator can include a housing, one or more input devices positioned to receive information, and a memory device positioned to store at least a portion of the information received by the one or more input devices. The wallet consolidator can also include a radio frequency wireless communication interface associated with the housing and adapted to communicate with a point-of-sale terminal thereby to provide at least a portion of the information stored in the memory device to the point-of-sale terminal, a display screen, and a controller positioned within the housing in communication with and to control each of the one or more input devices, the memory device, the radio frequency wireless communication interface, and the display screen.

Description:
RELATED APPLICATIONS 
     This application is a divisional of and claims priority to and the benefit of U.S. patent application Ser. No. 09/923,617, filed Aug. 6, 2001, titled “Wallet Consolidator and Related Methods of Processing a Transaction Using a Wallet Consolidator,” now U.S. Pat. No. 7,349,885 which is a continuation of U.S. patent application Ser. No. 09/618,407, filed Jul. 18, 2000, titled “Wallet Consolidator,” now U.S. Pat. No. 6,293,462, which is a continuation of U.S. patent application Ser. No. 09/087,193, filed May 29, 1998, titled “Wallet Consolidator,” now U.S. Pat. No. 6,131,811, each incorporated herein by reference in their entireties. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of The Invention 
     The present invention pertains in general to the use of electronic smart cards for the storage of information pertaining to electronic commerce and consumer identification, and in particular, but not by way of limitation, to an apparatus for the warehousing and retrieval of information pertaining to credit cards, debit cards, identification cards, and other selected data. 
     2. Description of Related Art 
     In today&#39;s electronic commerce there has been a proliferation in the use of various types of credit, debit, identification, and other types of authorization cards. For example, an average individual is likely to carry a driver&#39;s license, several credit and debit cards, an identification card for access to a health club, an identification card to gain access to a place of employment, and an access card to gain entry into a parking garage, among others. Furthermore, with advances in electronic commerce, smart cards are likely to replace paper and coin money resulting in an additional card for consumers to carry. Each of these cards typically incorporates a magnetic stripe or bar code to facilitate easy recognition of the card and to store various types of data. Although the use of these cards allows for easy and efficient electronic commerce, the number of such cards quickly becomes cumbersome and many individuals find carrying the large number of cards inconvenient. 
     Attempts have been made to use a single smart card to hold the various information contained on several cards. These attempts, however, involve the downloading of information from the smart card provider and do not allow a smart card user to control the contents of the device by adding additional information from newly issued cards or removing information from discontinued cards. 
     It would be advantageous, therefore, to devise an apparatus for consolidating the various cards, and other types of information, which individuals typically carry in a wallet or purse. It would further be advantageous if such an apparatus stored the information in a central location and facilitated the use of a single multi-purpose card. It would still further be advantageous if such an apparatus allowed the user of the apparatus the ability to control the stored information. 
     SUMMARY OF THE INVENTION 
     In view of the foregoing, embodiments of the present invention advantageously provide a wireless device or apparatus, also known as a wallet consolidator, capable of warehousing digitized information stored on various types of credit, debit, identification, and other types of authorization cards, including identification information, some or all of which to be delivered to various computing devices and possibly a portion to a device operator located with the computer device. According to an embodiment of the present invention, a wallet consolidator to warehouse information pertaining to at least one card and to retrieve the warehoused information to facilitate a transaction at a point-of-sale terminal can include, for example, a housing, one or more input devices associated with the housing and positioned to receive information, and a memory device associated with then housing and positioned to store at least a portion of the information received by the one or more input devices. One or more input devices, for example, can be positioned to receive information associated with the at least one card so that at least a portion of the information received by the one or more input devices enables a point-of-sale transaction. The at least one card can be, for example, a credit card, a debit card, an identification card, or an electronic coupon. The one or more input devices, for example, can include a magnetic stripe reader/writer for reading and writing magnetic stripes, a bar code scanner for scanning bar codes, a keypad, a touch sensitive display screen, or an input cluster among others, to input user selections and commands. 
     An embodiment of the wallet consolidator can also include a radio frequency wireless communication interface associated with the housing and adapted to communicate with a point-of-sale terminal thereby to provide at least a portion of the information stored in the memory device to the point-of-sale terminal, a display screen, and a controller positioned within the housing in communication with each of the one or more input devices, the memory device, the radio frequency wireless communication interface, and the display screen. The display screen, for example, can be configured to display a menu of functions to a user. The menu of functions, can, for instance, include one or more of: adding card information, deleting card information, duplicating information, transferring information, moving cash, and accessing information. The information received by the one or more input devices, can include, for example, identification information. Moreover, the controller, according to an embodiment of the wallet consolidator can be positioned, for example, to control input of the information into the memory device of the wallet consolidator through the one or more input devices, display of the menu of functions to a user through the display screen, retrieval of at least a portion of the information from the memory device, and output of at least a portion of the information stored in the memory device through the radio frequency wireless communication interface to the point-of-sale terminal. A user, for example, can select the at least a portion of the information using one of the one or more input devices and position the wallet consolidator in communication with the point-of-sale terminal to enable a point-of-sale transaction responsive to the point-of-sale terminal receiving the at least a portion of the information communicated thereto from the wallet consolidator to thereby facilitate a transaction at the point-of-sale terminal. 
     In another embodiment of the present invention, for example, the one or more input devices can be, for example, connected to the housing and can including at least one keypad. Additionally, the memory device can be, for example a memory positioned within the housing, and the radio frequency wireless communication interface can be, for instance, connected to the housing. Moreover, the display screen can be connected to the housing and positioned on a same face of the housing as the at least one keypad, and the controller can be positioned within the housing and can be in communication with each of the one or more input devices, the memory, the display screen, and the wireless communication interface. Also according to an embodiment of the present invention, the at least a portion of the information stored in the memory device of the wallet consolidator can be transmitted to various computing devices such as, but not limited to, point-of-sale terminals, dumb terminals, and databases, positioned to process a point-of-sale transaction effectuated pursuant to the at least a portion of the information. The at least a portion of the information stored in the memory device of the wallet consolidator can be communicated to the various computing devices via a data interface, a infrared transceiver, or a radio frequency wireless communication interface. 
     More specifically, according to an embodiment of the present invention, the one or more input devices can be associated with the housing and positioned to receive information associated with at least one card from one or both of a remote database and a user so that at least a portion of the information received by one of the one or more input devices enables a transaction. Additionally, for example, the radio frequency wireless communication interface can be associated with the housing and adapted to be positioned to communicate with a remote database thereby to provide the at least a portion of the information stored in the memory to a remote database. Also according to an embodiment of the present invention, the controller can be can be positioned to control input of the information into the memory of the wallet consolidator through the one or more input devices, display the menu of functions to a user through the display screen, retrieve the at least a portion of the information from the memory, and output the at least a portion of the information stored in the memory through the radio frequency wireless communication interface to a remote database. A user, for example, can select the at least a portion of the information using one of the one or more input devices and position the wallet consolidator in communication with a remote database to enable a transaction responsive to a remote database receiving the at least a portion of the information communicated thereto from the wallet consolidator to thereby facilitate a transaction. 
     According to an exemplary embodiment of the present invention, the one or more input devices can include at least on keypad, and the display screen can be connected to the housing and beneficially positioned on a same face of the housing as the at least one keypad. Furthermore, the information displayed on the display screen can comprise information from the memory device being displayed as controlled by the controller. Additionally, the information received by the one or more input devices can include information included on a plurality of different cards, the cards being selected from the group of credit cards, debit cards, identification cards, and electronic coupons. Also according to an embodiment of the present invention, the one or more input devices can be adapted to receive an input of a passcode from a user to gain access to the wallet consolidator so that the controller displays the menu of functions after the user gains access to the wallet consolidator by entering the passcode through the one of the one or more input devices. Moreover, the one or more input devices, for example, can further include a touch sensitive display screen associated with the display screen, associated with the housing, and positioned adjacent to the at least one keypad. In an embodiment of the present invention, the at least one keypad can comprise a first keypad, and the touch sensitive display screen can include a second keypad. 
     According to another embodiment of the present invention, the memory device can be configured to have sufficient memory to store a digitized image. The digitized image can include, for instance, a digitized image of a signature, a portrait, the at least one card, and a bar code. The controller can, for example, be configured to operably store the digitized image in the memory device of the wallet consolidator and to display the digitized image on the display screen of the wallet consolidator. Furthermore, the digitized image displayed on the display screen can be adapted to be used at a point-of-sale terminal. The controller, for example can be further configured to store a digitized image of a bar code in the memory device of the wallet consolidator and can be adapted to display the digitized image of a bar code on the display screen so that the displayed digitized image of a bar code can be scannable by a bar code scanner. In another embodiment of the present invention, the information stored in the memory device of the wallet consolidator can include at least one bar code and the controller can be configured to operably display the bar code on the display screen to thereby define a displayed bar code image. The displayed bar code image, for example, can be adapted to be scannable by a bar code scanner. 
     According to an embodiment of the wallet consolidator, in its most generalized configuration, the one or more input devices can include, but is not limited to, one or more of the following: a magnetic stripe card reader, a bar code reader, a keypad, a touch screen, a smart card reader, a kiosk, a memory card, a telephony interface, a wireless interface, a wireline communication interface, a wireless communication interface, an infrared (IR) interface, and a radio frequency (RF) interface. The memory device can include, but is not limited to, one or more of the following: semiconductor memory, a smart card (contact, contactless, or hybrid), a memory card (portable flash memory), random access memory (RAM), magnetic memory, a hard disk, a magnetic tape, an optical memory device, and an optical disc. Also according to an embodiment of the present invention, the wallet consolidator can include, for example, a communication interface. The communication interface can include, but is not limited to, one or more of the following: a data interface, a telephony interface, a wireless interface, a wireline communication interface, a wireless communication interface, a radio frequency (RF) interface, an infrared (IR) interface, and a display configured for displaying scanable bar codes. 
     To store information in the wallet consolidator, for example, or alternatively in a smart card interfaced to the wallet consolidator, information can be read from magnetic stripes on various types of cards such as, but not limited to, credit, debit, and identification cards. A bar code scanner allows a bar code to be scanned from a card and stored in the memory device. Additionally, images of the cards including, but not limited to, signatures and portraits can be downloaded, and with sufficient memory, stored for future use. A user can retrieve information using the one or more input devices for use in, for example, a point-of-sale transaction. The stored images can be retrieved and displayed on a display screen, including a bar code, which can be scanned by a bar code scanner. 
     According to another embodiment of a wallet consolidator, the wallet consolidator can include an one or more input devices positioned to receive information stored on at least one card, a memory device connected to the one or more input devices to store the information received by the input device, and a communication interface connected to the memory device and positioned to transmit at least a portion of the information stored in the memory device to a point-of-sale terminal located at a point-of-sale. The point-of-sale terminal can be positioned to process a transaction responsive to the at least a portion of the information. The information can include, for example, account identification information pertaining to at least one of the following: one or more credit cards, one or more debit cards, one or more identification cards, one or more electronic coupons, one or more medical records, one or more health club membership accounts, or one or more food stamp accounts. Accordingly, the at least one card can include one or more credit cards, one or more debit cards, one or more identification cards, one or more electronic coupons, one or more medical record cards, one or more health club identification access cards, one or more employment identification access cards, one or more parking garage access cards, or one or more food stamp identification cards. The information can also include driver&#39;s license data taken from, for example, a driver&#39;s license card. Further, the information can include a digitized image of the at least one card, to thereby provide further functionality. Advantageously, the communication interface can include a wireless communication interface such as, for example, a wireless interface, a wireless communication interface, or a radio frequency (RF) wireless communication interface, to thereby enhance personal mobility. 
     According to another embodiment of the present invention, a wallet consolidator includes a controller positioned to control operation of the wallet consolidator, one or more input devices in communication with the controller and positioned to receive a copy of identification information stored on at least one card, a memory device in communication with the controller and positioned to store the identification information received by the one or more input devices, and a communication interface in communication with the controller and positioned to transmit at least a portion of the identification information stored in the memory device to a point-of-sale terminal located at a point-of-sale. The point-of-sale terminal can be positioned to process a point-of-sale transaction responsive to the at least a portion of the identification information. According to an embodiment of the wallet consolidator, the information can include identification information contained on the at least one card, and the communication interface can be wireless and can include, for example, a wireless interface, a wireless communication interface, or a radio frequency (RF) wireless communication interface, to thereby enhance personal mobility. 
     According to another embodiment of a wallet consolidator, the wallet consolidator can include one or more input devices positioned to receive information stored on at least one card, a memory device connected to the input device to store the information received by the input device, and a wireless communication interface connected to the memory device and positioned to transmit at least a portion of the information stored in the memory device to a point-of-sale terminal located at a point-of-sale. The point-of-sale terminal can be positioned to process a transaction responsive to the at least a portion of the information. 
     According to another embodiment of a wallet consolidator, the wallet consolidator can include an one or more input devices positioned to receive information stored on at least one card, a memory device connected to the one or more input devices to store the information received by the one or more input devices, and a communication interface connected to the memory device and positioned to effectuate communication of at least a portion of the information stored in the memory device to a point-of-sale terminal located at a point-of-sale when the point-of-sale terminal is positioned to receive the at least a portion of the information from the wallet consolidator for use in a point-of-sale transaction. The communication interface can include, for example, a data interface, a telephone interface, an infrared transceiver, a wireless communication interface, or a radio frequency (RF) wireless communication interface. 
     According to another embodiment of a wallet consolidator, the wallet consolidator can include a controller positioned to control operation of the wallet consolidator, one or more input devices in communication with the controller and positioned to receive information contained on at least one card, a memory device in communication with the controller and positioned to store the information received by the one or more input devices, and a wireless communication interface in communication with the controller and positioned to interface with a point-of-sale terminal located at a point-of-sale to provide at least a portion of the information stored in the memory device to the point-of-sale terminal. The point-of-sale terminal can be positioned to enable a transaction responsive to receiving the at least a portion of the information. 
     According to another embodiment of a wallet consolidator, the wallet consolidator can include a controller positioned to control operation of the wallet consolidator, one or more input devices in communication with the controller and positioned to receive information contained on at least one card, a memory device in communication with the controller and positioned to store the information received by the input device, and a wireless communication interface in communication with the controller. The wireless communication interface is adapted to be positioned to interface or to effectuate communication with a point-of-sale terminal located at a point-of-sale to provide at least a portion of the information stored in the memory device to the point-of-sale terminal when the wallet consolidator is positioned adjacent the point-of-sale terminal to thereby enable a transaction responsive to receiving the at least a portion of the information. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       So that the manner in which the features and advantages of the invention, as well as others which will become apparent, may be understood in more detail, a more particular description of the invention briefly summarized above may be had by reference to the embodiments thereof which are illustrated in the appended drawings, which foam a part of this specification. It is to be noted, however, that the drawings illustrate only various embodiments of the invention and are therefore not to be considered limiting of the invention&#39;s scope as it may include other effective embodiments as well. 
         FIG. 1  is a functional block diagram of the wallet consolidator; 
         FIG. 2  is a flow diagram of a preferred method for consolidating card information using the wallet consolidator described in  FIG. 1 ; and 
         FIG. 3  is a perspective view of a wallet consolidator consistent with a preferred embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION 
     The present invention will now be described more fully hereinafter with reference to the accompanying drawings which illustrate preferred embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like numbers refer to like elements throughout, the prime notation, if used, indicates similar elements in alternative embodiments. 
     Referring now to  FIG. 1 , there is illustrated a functional block diagram of a wallet consolidator shown generally at  100 . The functional components of the wallet consolidator  100  can include a controller  110 , a memory device  120 , a user input cluster  130 , a data interface  140 , a keypad  150 , a telephone interface  160 , a smart card interface  170 , a bar code scanner  180 , an infrared (IR) transceiver  190 , a display screen  200 , a radio frequency (RF) transceiver  210 , and a magnetic stripe reader/writer  220 . 
     The controller  110  controls the overall operation of the wallet consolidator  100  including the coordination of the various functional blocks. The magnetic stripe reader/writer  220  is used to read and write information from and to magnetic stripes used on credit cards, debit cards, and identification cards among others. Information read from the magnetic stripes by the magnetic stripe reader/writer  220  can be stored in the memory device  120  of the wallet consolidator  100 . In an alternative embodiment, the information can be stored in a memory device located within a smart card which is commonly known in the industry. In situations where the information from the magnetic stripe is stored in the memory device of the smart card, the information can be written into the memory of the smart card using the smart card interface  170 . The smart card interface  170  can effectuate reading and writing from and to the smart card. 
     A keypad  150  can be used as a user input device for inputting information or indicating selections and actions to the wallet consolidator  100 . In an embodiment of the present invention, the keypad  150  is a numeric keypad, however; in an alternative embodiment the keypad  150  is an alphanumeric keypad. The user input cluster  130  provides an additional user input device for communicating selections and actions to the wallet consolidator  100 . While it is understood that the user input cluster  130  can have any number of input buttons, a preferred configuration includes an up and a down button for moving through options provided to the user on the display screen  200 , a delete button for removing items from the display screen, and an activate button for making a selection or enabling an action by the wallet consolidator  100 . 
     The bar code scanner  180  allows a user to scan a bar code on the face of identification, credit, debit, and other types of cards and to store the bar code in the memory device  120  of the wallet consolidator, or alternatively, in the memory device of the smart card. In either event, the user can select the bar code for display on the display screen  200  such that the bar code, as displayed on the display screen  200 , is readable by a bar code scanner. 
     In addition to displaying items stored in the memory device  120  of the wallet consolidator  100 , or alternatively the memory device of the smart card, the display screen  200  can be used for programming, or otherwise controlling, the operation of the wallet consolidator  100 . For example, the display screen  200 , in conjunction with the keypad  150  or the user input cluster  130 , can be used by the user to input a passcode to gain access to the wallet consolidator  100 . In an alternative embodiment, the keypad  150  can be effectuated using a touch sensitive display screen  200 . 
     After gaining access to the wallet consolidator  100 , the controller  110  can display a menu of functions on the display screen  200  and the user can make a selection by either using the user input cluster  130  to scroll through and select an option or by directly selecting an option using the keypad  150 . The types of options can include, but are not limited to, selecting a card to add or delete, duplicating information, transferring data, moving cash, or accessing various types of information such as electronic coupons, identification information, or medical records among others. Based on the selected option, the wallet consolidator  100 , via the display screen  200 , can traverse an action tree which instructs the user on the use of the wallet consolidator  100 . 
     The data interface  140  and telephone interface  160  can effectuate communication between the wallet consolidator  100  and various computing devices such as, but not limited to, point-of-sale terminals, dumb terminals, and databases. The data interface  140  can use a serial data port, a parallel data port, or any other data communication technique. In a similar fashion, the telephone interface  160  can allow communication via a wireline or wireless telecommunication network. Furthermore, the infrared transceiver  190  and the radio frequency transceiver  210  can effectuate wireless communication between the wallet consolidator  100  and various computing devices such as, but not limited to, point-of-sale terminals, dumb terminals, and databases, which are equipped with a similar infrared transceiver or radio frequency transceiver. 
     The wallet consolidator  100 , according to an embodiment of the present invention, can allow an individual to swipe his or her credit, debit, identification, or other type cards through the magnetic stripe reader/writer  220  and store the information contained in the magnetic stripe in the memory device  120  of the wallet consolidator  100 , or alternatively, in the memory device of the smart card. The wallet consolidator  100  can also allow an individual to scan a bar code on a card using the bar code scanner  180  and store the bar code in the wallet consolidator  100 , or alternatively in the memory device of the smart card. Furthermore, the individual can download the image of the cards or other cards which do not have a magnetic stripe and, with sufficient memory, store a digitized image in the memory device  120  of the wallet consolidator  100 , or alternatively in the memory device of the smart card. Additionally, other types of information can be stored in either the memory device  120  of the wallet consolidator  100  or the memory device of the smart card. Among other types of information, items such as electronic coupons or food stamp balances can be stored and then redeemed during a point-of-sale transaction. Communication with various computing devices such as, but not limited to, point-of-sale terminals, dumb terminals, and databases, can be effectuated using the telephone interface  160 , the radio frequency transceiver  210 , the infrared transceiver  190 , or the display screen  200 . 
     Referring additionally now to  FIG. 2 , there is illustrated a flow diagram of a preferred computer implemented method for consolidating card information using the wallet consolidator  100  described in  FIG. 1 . Information stored on magnetic stripes can be entered into the wallet consolidator  100  by swiping the subject identification, credit, debit, or other type of card through the magnetic stripe reader/writer  220  to read the information from the magnetic stripe of the subject card (step  300 ). Alternatively, the information can be entered into the wallet consolidator  100  via the data interface  140 , the keypad  150 , the telephone interface  160 , the infrared transceiver  190 , or the radio frequency transceiver  210 . The entered information can be stored in the memory device  120  of the wallet consolidator  100 , or alternatively, in the memory device of the smart card (step  310 ). 
     Similarly, bar codes from the cards can be scanned (step  320 ) and the bar codes can be stored in the memory device  120  of the wallet consolidator  100 , or alternatively, in the memory device of the smart card (step  330 ). Alternatively, the information can be entered into the wallet consolidator  100  via the data interface  140 , the keypad  150 , the telephone interface  160 , the infrared transceiver  190 , or the radio frequency transceiver  210 . 
     Still further, other information such as electronic coupons or images such as portraits and signatures can be downloaded into the wallet consolidator  100  (step  332 ) and stored in the memory device  120  of the wallet consolidator  100 , or alternatively, in the memory device of the smart card (step  334 ). The information can be downloaded into the wallet consolidator  100  via the data interface  140 , the keypad  150 , the telephone interface  160 , the infrared transceiver  190 , or the radio frequency transceiver  210 . 
     To retrieve magnetic stripe information from the wallet consolidator  100 , the user can select the desired information using either the user input cluster  130  or the keypad  150  (step  340 ). Once the information has been selected, the information can be written onto a magnetic strip of the smart card or other multi-use card (step  350 ). Alternatively, the information which was selected can be communicated to various computing devices such as, but not limited to, point-of-sale terminals, dumb terminals, and databases via the data interface  140 , the telephone interface  160 , the infrared transceiver  190 , or the radio frequency transceiver  210 . 
     Similarly, the user can select a desired bar code using either the user input cluster  130  or the keypad  150  (step  360 ), and the selected image can be displayed on the display screen  200  (step  370 ). Alternatively, the selected information can be communicated to various computing devices such as, but not limited to, point-of-sale terminals, dumb terminals, and databases via the data interface  140 , the telephone interface  160 , the infrared transceiver  190 , or the radio frequency transceiver  210 . 
     Still further, the user can select stored information, including downloaded information (step  380 ), and display the selected information (step  390 ) or download the selected information (step  400 ) to various computing devices such as, but not limited to, point-of-sale terminals, dumb terminals, and databases via the data interface  140 , the telephone interface  160 , the infrared transceiver  190 , or the radio frequency transceiver  210 . 
     Referring now to  FIG. 3 , there is illustrated a perspective view of a wallet consolidator  100 . The wallet consolidator, shown generally at  100 , can include a housing  105 , the controller  110  which is located internally and not shown, the memory device  120  also located internally and not shown, the user input cluster  130 , the data interface  140 , the keypad  150 , the telephone interface  160 , the smart card interface  170 , the bar code scanner  180 , the infrared transceiver  190 , the display screen  200 , the radio frequency transceiver  210 , and the magnetic stripe reader/writer  220 . 
     This application is related to U.S. patent application Ser. No. 11/932,049, filed Oct. 31, 2007, titled “Wallet Consolidator and Related Methods of Processing a Transaction Using a Wallet Consolidator”; U.S. patent application Ser. No. 09/923,617, filed Aug. 6, 2001, titled “Wallet Consolidator and Related Methods of Processing a Transaction Using a Wallet Consolidator” now U.S. Pat. No. 7,349,885; U.S. patent application Ser. No. 09/618,407, filed Jul. 18, 2000, titled “Wallet Consolidator,” now U.S. Pat. No. 6,293,462; and U.S. patent application Ser. No. 09/087,193, filed May 29, 1998, titled “Wallet Consolidator,” now U.S. Pat. No. 6,131,811, each incorporated herein by reference in their entireties. 
     In the drawings and specification, there have been disclosed a typical preferred embodiment of the invention, and although specific terms are employed, the terms are used in a descriptive sense only and not for purposes of limitation. The invention has been described in considerable detail with specific reference to these illustrated embodiments. It will be apparent, however, that various modifications and changes can be made within the spirit and scope of the invention as described in the foregoing specification and as defined in the appended claims.