Abstract:
A computer keyboard is designed to accommodate a variety of security features that may be installed in the keyboard during manufacturing, whereby various combinations of devices that impart selected security features or other functions may be assembled. The keyboard assembly includes a base extension for accommodating the security devices, and a number of interchangeable modular tops supporting various discreet input technologies. This modular design is tooled to accommodate different combinations of technologies, such as biometric fingerprint readers, NFC-RFID receivers, auto locking sonar, game cartridges, and connector-supporting modules. Each interchangeable modular top can hold independent modular technology that can be used to construct an integrated device that meets the customer requirements without any substantial modification of the keyboard base or extension.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims the benefit of filing date priority based on U.S. application Ser. No. 13/136,358, filed Jul. 28, 2011, which claims filing date priority based on Provision Application No. 61/369,301, filed Jul. 30, 2010. 
     
    
     FEDERALLY SPONSORED RESEARCH 
       [0002]    Not applicable. 
       SEQUENCE LISTING, ETC ON CD 
       [0003]    Not applicable. 
       BACKGROUND OF THE INVENTION 
       [0004]    1. Field of the Invention 
         [0005]    This invention relates to a keyboard for use with a computer system, particularly a computer system that requires secure log-in arrangements and the ongoing presence of the logged-in individual at the keyboard. 
         [0006]    2. Description of Related Art 
         [0007]    As computer systems have become more and more essential to the operation of businesses and institutions, there has been a concomitant increase in the number of terminals, work stations, desktop computers and the like that are connected to the computer system that serves the business or institution. One of the many uses of a central computer system is the storage of records that should be held confidential, such as medical data regarding individuals, personnel records, financial records and transactions of the business or institution, payroll records, and the like. For this and other reasons there is a definite need for some form of security system to limit access to confidential information, not to mention access to computerized functions such as payroll, billing, and the like. On the other hand, it is necessary to grant access of some sort to a large number of individuals so that they may carry out their assigned tasks which often involve interaction with the computer system. The confluence of the requirement for confidentiality and the need to grant access has lead to a proliferation of security measures and systems that are designed to recognize individuals who are authorized to have access to the computer system and at least some portion of its records and functions, while denying access to those individuals who endeavor to gain access to the system without authorization. 
         [0008]    The most common security devices and measures currently in use include passwords assigned individually to each employee, biometric sensors such as fingerprint readers, iris scanners, facial recognition, and the like, electronic scanners such as RFID or NFC-RFID for security cards or badges, and auto locking sonar transceivers to detect whenever an authorized individual leaves the vicinity of the computer or terminal where authorized access took place. See for example the description of an auto locking sonar system in U.S. application Ser. No. 13/136,358, filed Jul. 28, 2011, which is incorporated by reference herein in its entirety. 
         [0009]    It may be appreciated that security requirements for computer systems may vary widely, depending on the nature of the business or activity and the sensitivity of the data stored in the computer system. System integrators who design the computer scheme for a business or institution generally must select discrete devices that perform the requisite security functions, and must connect them at each terminal or workstation, often with a proliferation of cables and connectors. These devices are provided in addition to the computer keyboard and monitor, and often a printer and/or scanner. The number of hardware items included in a single terminal or workstation may comprise a logistical and wiring challenge. 
         [0010]    And more generally, a terminal or workstation may be required to be equipped with some other forms of functionality such as a USB connector port or iPod™ or smart phone connector or a game cartridge connector, or similar modular functional components. Typically these functions are embodied in modules that are connected to the terminal or workstation via cables, as with the security modules noted above. 
       BRIEF SUMMARY OF THE INVENTION 
       [0011]    The present invention generally comprises a computer keyboard for use with a terminal or workstation or desktop computer setup. A salient feature of the keyboard is that it is designed to accommodate a variety of security features that may be installed in the keyboard during manufacturing, whereby various combinations of devices that impart selected security features may be assembled. The resulting keyboard integrates a plurality of security devices into one keyboard construction, reducing the proliferation of desktop devices surrounding the keyboard and monitor, and simplifying the wiring of the system. 
         [0012]    In one aspect the invention provides a keyboard assembly having a unique modular system, designed to have flexible interchangeable tops to accommodate various discreet input technologies. This modular design is tooled to accommodate up to seven different combinations of technologies; presently there are three types of biometric fingerprint readers, NFC-RFID receivers and auto locking sonar. Each interchangeable modular top can hold independent input technology that can be used to construct an integrated device that meets the customer&#39;s requirements. 
         [0013]    The interchangeable modular top, once fitted with the selected input technology and connected electronically via an internal USB hub, can be assembled into the final product during manufacturing with five screws. 
         [0014]    Conversely the keyboard can be upgraded or modified at a later date if returned to the factory or serviced by a qualified technician. 
         [0015]    Adding to the versatility of this keyboard design is an integrated “utility well” specifically designed to allow for field changes and upgrades of the NFC/RFID technology. The well extends under a portion of the interchangeable modular top, and is secured by a proprietary locking screw or the like and a clear plastic cover. A decorative branded label is placed over the clear plastic cover to designate the internal technology and a opening to show a functional LED indicator. The basic design concept allows the keyboard to be customized with the latest technologies without total redesign and at a very low cost. That is, an authorized technician may open the plastic cover, extract and replace the module therein, and restore the cover. Thus the system may be upgraded with the latest technological developments without requiring replacement of the entire keyboard. Indeed, no part of the keyboard may need replacement, except for the modular component received and connected in the utility well. 
         [0016]    The interchangeable modular tops provided by the invention may be used to provide a wide range of new functionality to the terminal or workstation. For example, the modular tops may support features such as USB connector(s), iPod or smart phone connectors, game cartridge connectors, proprietary connectors, or the like. Likewise, these functional components may be placed in the utility well and connected therein to a USB port, with a well cover that is appropriate for the purpose. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWING 
         [0017]      FIG. 1  is a perspective view depicting the computer keyboard assembly of the invention, showing the provision of three separate security modules in the assembly. 
           [0018]      FIG. 2  is an exploded bottom perspective view showing the assembly of the interchangeable top cover to the base of the keyboard assembly. 
           [0019]      FIG. 3  is an enlarged partially sectioned perspective view of the base extension housing selectively chosen security devices. 
           [0020]      FIG. 4  is a perspective view of the interchangeable modular top of the base extension, incorporating a sonar auto-locking system and an RFID device. 
           [0021]      FIG. 5  is a perspective view of an interchangeable modular top of the base extension, showing a receptacle or well for receiving and connecting a security device such as an RFID or NFC-RFID unit. 
           [0022]      FIGS. 6A-6E  are perspective views of the interchangeable top of the base extension, depicting various other combinations of security devices that may be incorporated in the keyboard assembly. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0023]    The present invention generally comprises a computer keyboard that it is designed to accommodate a variety of security features that may be installed in the keyboard during its manufacture, whereby various combinations of devices that impart selected security features may be assembled to form a single, integrated keyboard unit. With regard to  FIG. 1 , the keyboard assembly  11  is comprised of a base assembly  12  having a generally rectangular shape extending laterally and having a bottom surface  13  ( FIG. 2 ) designed to rest on a horizontal surface such as a desk or table. The top surface  14  of the base assembly  12  includes an array of keys presented in a standard format, such as the Qwerty layout  16  shown in the figure. Adjacent to the qwerty layout  16  is a numeric keypad  17 , as well as directional navigation arrow keys  18 . The layout of keys shown herein is for example only: many such layouts are well known in the prior art, and the key layout forms no independent part of this invention. 
         [0024]    At the top (distalmost from the keyboard user) of the key layouts is a row of function keys  19  for accessing computer functions directly, as is known in the prior art. Adjacent to the function key row  19  is a base extension  21  of the keyboard base assembly  12  extending laterally the width of the keyboard assembly and distally from the user in a generally flat rectangular configuration. A cover  22  may be secured to the base extension  21  to form a smooth contiguous surface with the keyboard portion of the assembly. The base extension  21  is assemblable to the base  12  of the assembly or formed therewith to define a single integrated assembly. The cover  22  is secured to the base extension  21  by a plurality of screws  23  or the like received in appropriately tapped holes in the cover  22 . The screws may be non-removable or be installed with thread-locking compound to prevent disassembly by unauthorized persons. 
         [0025]    A significant feature of the invention is the ability of the keyboard assembly  11  to incorporate various selected security devices to enable the keyboard assembly to be used only by authorized individuals. Typically the keyboard is connected to a computer system via a cable  24 , along with a computer monitor screen and other ancillary devices that may form a computer work site, workstation, desktop computer or the like installation (hereinafter, workstation). The security devices of the keyboard assembly may be chosen to suit the installation situation, and are typically connected to prevent login to the computer system without proper authorization, and to log out of the computer system whenever an authorized user has moved away from the workstation, so that an unauthorized person may not assume the place of an authorized individual and gain access to the computer system. 
         [0026]    As shown in  FIG. 3 , the base extension  21  is configured as a shallow, upwardly opening coffer  31  having defined bays that carry out separate and distinct functions. Bay  32  is intended to house a printed circuit board and other electronic components that enable communications between the keyboard assembly  11  and the computer system through the cable  24 . Thus all of the signaling for keys  17 - 19  is connected directly through cable  24  to the workstation, and does not require any additional modular components. Adjacent to bay  32  there is a utility well  33  defined between reinforcing bulkheads  34  and  36 . The utility well is dimensioned to be receptive to any one of a number of standard security sensor modules known in the prior art, such as RFID, NFC-RFID, and other electromagnetic or RF identity card or badge readers. The well  33  is also provided with a standard USB  2 . 0  or  3 . 0  or equivalent connector  37  so that any security sensor module placed in the well  33  may be connected to provide power as well as data transmission through the keyboard and thus through the cable  24  to the computer system. In addition, another bay  38  is defined between reinforcing bulkheads  36  and  39 , and a further bay  41  is defined between reinforcing bulkheads  42  and  43 , which forms one end of bay  32 . 
         [0027]    It may be appreciated that the utility well  33  and bays  38  and  41  may be provided with selected security sensor modules during the manufacture of the keyboard. A plurality of interchangeable covers  51  are also provided, each having a rectangular plan layout that fits in complementary fashion over the coffer opening  32  to enclose and seal the opening Furthermore, the interchangeable covers  51  are provided with features that either embody portions of the security sensor modules, or accommodate modules placed in the bays, or enable communications to the module(s) placed in the bay(s). 
         [0028]    For example, one very useful device for preventing unauthorized use of a workstation is a modular sonar auto-lock device  52 , which uses inaudible ultrasonic sound waves to detect the presence of a user in the immediate vicinity of the keyboard  11 . For a description of an auto locking sonar system incorporated in a keyboard, see U.S. application Ser. No. 13/136,358, filed Jul. 28, 2011, which is incorporated by reference herein in its entirety. The modular sonar auto-lock device  52  extends upwardly and fixedly from the cover  51  adjacent to one end thereof and in registration with the bay  38  in the base extension  21 . The bay  38  provides clearance for any depending portion of the module  52  and also facilitates connection of the module  52  to the keyboard communications electronics in bay  32  via wires  53  ( FIG. 2 ). The module  52  projects a cone of sonic energy toward the position of a user of the keyboard; after the individual has logged in to the computer system, the sonar system continuously detects the presence of the user. If the user departs the vicinity of the keyboard, creating an “open window” into the computer system, the device  52  will detect the user&#39;s absence immediately and will signal the system to freeze the screen of the associated monitor, log out of the computer system, and protect the system from inadvertent or intentional snooping. 
         [0029]    The utility well  33  may remain empty, or may be used to secure any one of a number of standard security sensor modules known in the prior art, such as RFID, NFC-RFID, and other electromagnetic or RF identity card or badge readers. The selected module is connected to the system through internal USB connector  37 , and is used by the computer system to verify the identity of an individual seeking authorization to use the workstation by scanning an identity card or badge, with or without requiring an alphanumeric security code from the individual. There are different manufacturing sources for the standard security sensor module, but their size, range, and power requirements are generally made similar by international standards. A translucent cover plate  54  is secured to the cover  51  over the opening of the utility well  33 , and an LED indicator light  56  is connected to illuminate the cover plate  54  when the security sensor module in well  33  is operating. The cover plate translucency enables the user to know that an active security sensor is attached and connected within the keyboard, and that it is operating. However, the module is not visible and cannot be identified. Generally the card or badge needs to be brought into proximity to the RFID sensor module, though some devices can read a card or badge within a range of several feet. 
         [0030]    Another significant security device that may be incorporated into the keyboard assembly is a biometric sensor module  61 , secured fixedly in the cover  51  and disposed in registration with the bay  41  of the base extension  21 . The bay  41  provides clearance for any depending portion of the module  61  and also facilitates connection of the module  61  to the keyboard communications electronics in bay  32  via wires  63  ( FIG. 2 ). The biometric sensor module  61  may comprise a fingerprint scanner, a retinal scanner, a facial recognition imaging device, or the like. Whatever the biometric technique carried out by the module  61 , it recognizes an authorized individual by detecting a physical feature that is unique to that person. Thus it established in personam identification of the individual, whereas the RFID approach is limited to establishing the identity of an authorized card in the possession of the user. 
         [0031]    A salient aspect of the invention is that the base extension provides the opportunity to select any combination of the three classes of security sensor modules that are supported and secured in the bays and the utility well  33 . In order to accommodate the different possible combinations of security modules, the invention provides a plurality of interchangeable modular covers  51  that are shaped and formed to incorporate one or more of the discrete input devices that have been described above, or none at all. For example,  FIG. 6A  depicts a cover  51 A that bears no facility for any of the security devices discussed above, so that it is used when the keyboard  11  is to be manufactured without including any security features whatsoever. 
         [0032]    As shown in  FIG. 6B , cover  51 B is identical to cover  51 A except for the inclusion of the biometric sensor module  61  in the upper surface of the cover and connected as described above to the keyboard and thence by cable  24  to the computer system. This cover  51 B is chosen to be used when a consumer desires a keyboard  11  that provides only the biometric sensor  61  to verify the user of the system. Likewise, cover  51 C ( FIG. 6C ) provides the modular sonar auto-lock device  52  to the keyboard assembly, and no other security device. In  FIG. 6D  the cover  51 D is shown to provide both the modular sonar auto-lock device  52  and the biometric sensor  61  for systems that are engineered to require biometric ID and continued presence of the user after authorization to use the workstation. And in  FIG. 6E  the cover  51 E provides support only for the utility well-mounted device, such as an RFID or NFC-RFID module. The cover plate  54  of the well  33  may be provided with a branded label identifying the vendor that provided the system, so users may know which security card or badge must be presented. 
         [0033]    Note that the cover  51 F of  FIG. 1  serves to provide all three security devices: the modular sonar auto-lock device  52 , the biometric sensor module  61 , and an RFID device in utility well  33 . Likewise, the cover  51 G of  FIG. 4  presents both the modular sonar auto-lock device  52  and some form of RFID module in well  33 , without the use of a biometric sensor module. 
         [0034]    Thus the keyboard system of the invention is adaptable to provide the type of security devices required by an existing computer system or incorporated into a newly designed computer system. The keyboard base assembly  12  with its base extension  21  may host a wide variety of security modules from a wide range of vendors, without necessitating any changes in the fundamental construction of the apparatus. The differing covers enable the quick and effective inclusion of the requisite security modules with a minimum of extra manufacturing expense, so that costs are held down while manufacturing flexibility is optimized. 
         [0035]    A further salient aspect of the invention is that the modular connectivity of the keyboard may be employed to incorporate a broad range of electronic devices and digital functionality in the workstation. The interchangeable covers  51  may incorporate features such as an external USB port or iPod™ connector or other smart phone connector. Likewise, non-security modular components such as game cartridges, graphics or other processors and the like may be added to the workstation via the keyboard. In this regard, note that the entire keyboard assembly is essentially unchanged: it is necessary only to create a cover  51  that incorporates the desired modules, connect the modules in the respective bays, and secure the cover over the coffer. Likewise, a broad range of devices may be placed and connected in the utility well  33 , such as any enumerated above. 
         [0036]    The foregoing description of the preferred embodiments of the invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and many modifications and variations are possible in light of the above teaching without deviating from the spirit and the scope of the invention. The embodiment described is selected to best explain the principles of the invention and its practical application to thereby enable others skilled in the art to best utilize the invention in various embodiments and with various modifications as suited to the particular purpose contemplated. It is intended that the scope of the invention be defined by the claims appended hereto.