Patent Publication Number: US-7896436-B2

Title: Office components, seating structures, methods of using seating structures, and systems of seating structures

Description:
REFERENCE TO RELATED APPLICATIONS 
     This application is a divisional application under 37 C.F.R. §1.53(b) of U.S. patent application Ser. No. 11/971,574, filed Jan. 9, 2008, now U.S. Pat. No. 7,735,918, which is a continuation of U.S. patent application Ser. No. 11/649,179, filed Jan. 3, 2007, now U.S. Pat. No. 7,393,053, which is a divisional of application Ser. No. 10/627,354, filed Jul. 24, 2003, now U.S. Pat. No. 7,163,263, which claims the benefit of priority under 35 U.S.C. §119(e) to U.S. provisional patent application Ser. No. 60/398,514, filed Jul. 25, 2002, the entire disclosures of which are hereby incorporated by reference. 
    
    
     BACKGROUND 
     The ability to adjust the configuration of a piece of furniture to correspond to the unique physical stature and/or personal preferences of an individual provides a mechanism for increasing the comfort, physical well-being (e.g., posture, spinal health, etc.), and in the case of office furniture, on-the-job productivity and satisfaction of the individual. Office and task chairs of the type described in U.S. Pat. No. 5,556,163 to Rogers, III et al. can be operated to adjust various chair settings (e.g., tilt, depth, height). However, while the adjustment mechanisms are electrically powered, the user still retains full responsibility for activating the adjustment mechanisms and for regulating the degree of adjustments made. An automatic adjustment mechanism capable of both sensing and delivering a particular degree of adjustment desirable for and/or desired by an individual without requiring the individual&#39;s supervision would be clearly advantageous. 
     Adjustment mechanisms for adjustable furniture may be based on non-automated mechanical systems powered completely by a user (e.g., by using levers or knobs to adjust tilt, height, etc. of a chair), or on automated systems powered by cordless power sources. The latter type is greatly preferred from the standpoint of user convenience and satisfaction. 
     Typically, sources of cordless power suitable for indoor applications have been limited primarily to conventional batteries. However, inasmuch as the reactants in a battery are stored internally, the batteries must be replaced or recharged once their reactants have been depleted. An alternative power source that would not require replacement or recharging, which is suitable for use in indoor environments, and which does not require connection or access to electrical outlets or lighting (either direct or indirect) would be advantageously employed in combination with electrically powered office furniture. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows a first office component embodying features of the present invention. 
         FIG. 2  shows a second office component embodying features of the present invention. 
         FIG. 3  shows a remote fuel cell powering a plurality of office components in accordance with the present invention. 
         FIG. 4  shows a plurality of fuel cells powering a plurality of office components in accordance with the present invention. 
         FIG. 5  shows a perspective front view of a chair embodying features of the present invention. 
         FIG. 6  shows a perspective rear view of the chair shown in  FIG. 5 . 
         FIG. 7  shows a perspective view of an automatic height adjustment mechanism and an automatic tilt adjustment mechanism embodying features of the present invention. 
         FIG. 8  shows a detailed view of the automatic height adjustment mechanism shown in  FIG. 7 . 
         FIG. 9  shows a detailed view of the automatic tilt adjustment mechanism shown in  FIG. 7 . 
         FIG. 10  shows a front view of a digital display and card reader embodying features of the present invention. 
         FIG. 11  shows a top view of the digital display and card reader shown in  FIG. 10 . 
         FIG. 12  shows a sound masking system embodying features of the present invention. 
         FIG. 13  shows a detailed view of an on-board power supply embodying features of the present invention. 
         FIG. 14  shows a schematic illustration of a first fuel cell-containing office component embodying features of the present invention. 
         FIG. 15  shows a schematic illustration of a second fuel cell-containing office component embodying features of the present invention. 
         FIG. 16  shows a schematic illustration of a third fuel cell-containing office component embodying features of the present invention. 
         FIG. 17  shows a perspective front view of a seating structure embodying features of the present invention. 
         FIG. 18  shows a side view of the seating structure shown in  FIG. 17 . 
         FIG. 19  shows a rear view of the seating structure shown in  FIG. 17 . 
         FIG. 20  shows a front view of the tilt adjustment mechanism shown in  FIG. 17 . 
         FIG. 21  shows a front view of an alternative tilt adjustment mechanism to the one shown in  FIG. 20 . 
         FIG. 22  shows a schematic illustration of a fourth fuel cell-containing office component embodying features of the present invention. 
         FIG. 23  shows a schematic illustration of a fifth fuel cell-containing office component embodying features of the present invention. 
         FIG. 24  shows a schematic illustration of a sixth fuel cell-containing office component embodying features of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE DRAWINGS AND PRESENTLY PREFERRED EMBODIMENTS 
     Office components with the capacity to automatically adjust one or more settings to conform to the unique physical stature and/or personal preferences of an individual user have been discovered and are described hereinbelow, including but not limited to chairs that have at least one of an automatic height adjustment mechanism and an automatic tilt adjustment mechanism. 
     In addition, it has been discovered that office components containing at least one electrically powered device, which may include one or both of the above-mentioned automatic adjustment mechanisms, can be powered by electricity generated from a fuel cell that is either attached to or remote from the office component. A fuel cell is an electrochemical device of increasing interest in the automotive industry as an environmentally benign potential replacement for the internal combustion engine. As is explained more fully hereinbelow, a fuel cell generates electricity from the electrochemical reaction between a fuel, such as hydrogen, and an oxidant, such as ambient oxygen. Water and heat are generally produced as byproducts of this electrochemical reaction. 
     Throughout this description and in the appended claims, the following definitions are to be understood: 
     The phrase “office component” refers to any type of portable or stationary furniture, particularly though not necessarily furniture used in an office. Representative office components include but are not limited to chairs, workstations (e.g., tables, desks, etc.), support columns and/or beams, wall panels, storage devices, bookcases, bookshelves, computer docking stations, computer internet portals, telephone switchboards, and the like, and combinations thereof, including for example and without limitation office furniture systems including and/or integrating one or more such components. 
     The phrase “seating structure” refers to any surface capable of supporting a person, including but not limited to chairs, benches, pews, stools, and the like. Seating structures may be portable (e.g., office chairs, barstools, etc.) or fixed to a surface (e.g., automobile seats, airplane seats, train seats, etc.). 
     The phrase “electrical conduit” refers to any complete or partial path over which an electrical current may flow. 
     The phrase “fuel cell” refers to any type of fuel cell, including but not limited to: polymer electrolyte membrane (PEM) fuel cells, direct methanol fuel cells, alkaline fuel cells, phosphoric acid fuel cells, molten carbonate fuel cells, solid oxide fuel cells, and any combination thereof. In addition, the phrase “fuel cell” should be understood as encompassing one or multiple individual fuel cells, and one or multiple individual “stacks” (i.e., electrically coupled combinations) of fuel cells. 
     The phrase “control system” refers to any computerized interface through which electronic functions may be regulated, data may be stored, or data may be read. 
     The phrase “office accessory” refers to any electronically powered device utilized in an office. 
     The phrase “power source” refers to any source of electrical power, including but not limited to fuel cells, batteries, solar cells, and the like, and combinations thereof. 
     The phrase “power capacitor” refers to any device capable of storing an electrical current, including but not limited to a battery. 
     The term “actuator” refers to any motive, electromotive, electrical, chemical, hydraulic, air, or electrochemical source of mechanical energy, including but not limited to motors, engines, and the like, and combinations thereof. 
     The phrase “load sensor” refers to any device capable of sensing the presence of and/or weighing an object or entity placed on a supporting surface. Suitable load sensors for use in accordance with the present invention include but are not limited to strain gages (i.e., mechanical devices that measure strain by measuring changes in length), spring gages, piezo devices (i.e., devices that convert mechanical energy into electrical energy), force sensitive resistors or FSRs (i.e., devices that work with resistive ink to measure load changes), springs and potentiometers, and the like, and combinations thereof. 
     The phrase “biasing member” refers to any device that can be moved and/or reversibly deformed, such that the movement and/or deformation provides a biasing force against a member mechanically coupled thereto. Representative biasing members include but are not limited to torsion springs (e.g., elastomeric torsion springs, coil springs, etc.), leaf springs, tension springs, compression springs, spiral springs, volute springs, flat springs, pneumatic devices, hydraulic devices, and the like, and combinations thereof. 
     The phrase “actuating member” refers to any device that can move and/or reversibly deform a biasing member. Representative actuating members include but are not limited to torque levers, fulcrum members, screws, and the like, and combinations thereof. 
     The term “transducer” refers to any device capable of sensing the position, angle of inclination, torque, or tension of a biasing member, actuating member, or any member mechanically coupled thereto, and of signaling a microprocessor when a target position, angle of inclination, torque or tension has been achieved. Representative transducers include but are not limited to translational position transducers (i.e., which determine position along one linear axis) and rotational position transducers (i.e., which determine position by measuring angular location of an element). 
     The phrase “encoded device” refers to any portable device capable of storing information. Representative encoded devices include but are not limited to cards, badges, keys, and the like, and combinations thereof. 
     The phrase “encoded device reader” refers to any device capable of decoding information stored on an encoded device, and of translating a signal to a processor. 
     The phrase “encoded device writer” refers to any device capable of saving information onto an encoded device. 
     The phrase “memory device” refers to any hardware device capable of storing information. 
     The phrase “control member” refers to any device capable of activating or deactivating a fuel cell, and of enabling a fuel cell to operate in either a “cycling” or “steady state” mode. In a “cycling” mode, the control member activates the fuel cell for a period of time when the power level of a power capacitor reaches a minimum set point, and deactivates the fuel cell when a power level of the power capacitor reaches a maximum set point. 
     An office component  2  embodying features of the present invention is shown in  FIGS. 1 and 2 . The office component  2  includes an electrical conduit  4  electrically coupled to a fuel cell  6 , and an electrically powered device  8  coupled to the electrical conduit  4  and configured to receive electricity generated by the fuel cell  6 . The fuel cell  6  may either be attached to the office component  2 , as shown in  FIG. 1 , or else remote thereto, as shown in  FIG. 2 , with attachment being especially preferred. 
     In a first series of presently preferred embodiments, shown in  FIG. 3 , one remote fuel cell  6  is electrically coupled to a plurality of electrical conduits  4 , and is configured to provide electricity to a plurality of office components  2 . The electrical conduits  4  can be electrically coupled to the remote fuel cell  6  by any of the methods known in the art, including but not limited to via wires, cables, or the like. It is preferred in such instances that the wires or cables be removed from view and from potential pedestrian traffic, for example, through concealment under carpeting, walls, wainscoting, conduits, wire management devices, or the like. 
     In a second series of presently preferred embodiments, shown in  FIG. 4 , a plurality of remote fuel cells  6 , configured to provide electricity to a plurality of office components  2 , are electrically coupled to a plurality of electrical conduits  4  in a grid-like configuration. The electrical conduits  4  can be electrically coupled to the remote fuel cell  6  by any of the methods known in the art, as described above. 
     The type of electrically powered device used in accordance with the present invention is unrestricted. Presently preferred devices included but are not limited to automatic adjustment mechanisms, control systems, sound masking systems, office accessories, and the like, and combinations thereof. For office components including at least one automatic adjustment mechanism, it is preferred that the office component also includes at least one complementary manual override mechanism whereby the corresponding automatic adjustment mechanism can be deactivated. 
     A presently preferred office component for use in accordance with the present invention is a seating structure, with a presently preferred seating structure being a chair containing a seat supported by a base. Preferably, chairs embodying features of the present invention further contain a backrest, which is connected either directly or indirectly to the seat and/or to the base. In addition, it is preferred that chairs embodying features of the present invention include at least one automatic adjustment mechanism. It is especially preferred that the automatic adjustment mechanism adjust at least one of chair height and chair tilt (e.g., seat and/or backrest inclination), although the automatic adjustment mechanism can be configured to adjust other aspects, including but not limited to seat depth, armrest height, lumbar pressure, lumbar position, sacral support, spinal support, cranial support, thoracic support, foot support, leg support, calf support, etc. Preferably, chairs embodying features of the present invention may be adjusted—automatically or manually—to achieve a full range of postures from a seated to a reclined to a standing position. 
     It is preferred that the power source used in accordance with the present invention is a fuel cell, although alternative power sources including but not limited to batteries and solar cells have also been contemplated. The power source can either be attached to or remote from the office component. However, particularly for seating structures embodying features of the present invention, it is preferred that the power source be attached to the office component such that the office component will be portable (i.e., not fixedly mounted on or hardwired to either a floor or a remote power source). 
     A chair  10  embodying features of the present invention is shown in  FIGS. 5-6  and includes a base  12 , a seat  14  connected to the base  12 , a backrest  16  connected to the seat  14 , and an electrical conduit (not shown) electrically coupled to a power source  18 . It is preferred that at least one of the connection between seat  14  and base  12  and the connection between backrest  16  and seat  14  be an adjustable connection. In alternative configurations, backrest  16  is connected to base  12  instead of to seat  14 . 
     In a first series of presently preferred embodiments, shown in  FIGS. 7-8 , the chair  10  includes an automatic height adjustment mechanism  20  coupled to the electrical conduit (not shown) and configured to receive electricity from the power source  18 . The automatic height adjustment mechanism  20  includes an actuator  22  (e.g., a motor), a gear  24  rotatably connected to the actuator  22 , a microprocessor  26  electrically coupled to the actuator  22 , and a load sensor  28  electrically coupled to the microprocessor  26 . 
     The gear  24  rotates a height-adjustable shaft  30  connecting seat  14  to base  12 . Preferably, the automatic height adjustment mechanism  20  further includes a rotatably adjustable nut  32  on shaft  30 , such that the gear  24  meshes with and rotates the rotatably adjustable nut  32 . The rotatably adjustable nut  32  may include a ball bearing (not shown) whereby the nut rotates on a threaded portion of shaft  30 . 
     The load sensor  28  provides a signal to the microprocessor  26  indicative of whether the height of the chair should be increased, decreased, or held constant. For example, the load sensor  28  can be used to detect whether and/or to what degree a load on the seat (e.g., a user) has been alleviated (e.g., when the user&#39;s feet become supported by the floor). Upon detecting that a load on the seat has been reduced or minimized, the automatic height adjustments would cease and the height of the chair would be held constant. Thus, upon sitting in a chair  10 , a user would be detected by load sensor  28  and the height of chair  10  would be adjusted automatically until the load of the user detected by load sensor  28  reached a minimum. 
     In a second series of presently preferred embodiments, shown in  FIGS. 7 and 9 , the chair  10  includes an automatic tilt adjustment mechanism  34  coupled to the electrical conduit (not shown) and configured to receive electricity from the power source  18 . The automatic tilt adjustment mechanism  34  includes an actuator  36 , a biasing member  38  mechanically coupled to the actuator  36 , a microprocessor  26  electrically coupled to the actuator  36 , and a load sensor  28  electrically coupled to the microprocessor  26 . Preferably, the biasing member  38  biases at least one of the seat  14  and the backrest  16 . 
     The load sensor  28  detects a weight on the seat  14 , and provides a signal to the microprocessor  26 , as described above. The microprocessor  26  calculates a target biasing force for the biasing member  38  based on the weight detected by load sensor  28  (e.g., by using a built-in algorithm relating proper spring tension to a person&#39;s weight), and the actuator  36  adjusts biasing member  38  to achieve the target biasing force. Thus, automatic tilt adjustment mechanism  34  provides automatic back support for an individual according to the individual&#39;s weight, with a heavier person requiring more tilt support than a lighter person. 
     Alternatively, upon receiving information from load sensor  28  relating to the weight of a user occupying chair  10 , microprocessor  26  may calculate an appropriate position, tension, or torque of an actuating member  44  acting on biasing member  38 , and instruct actuator  36  to adjust actuating member  44  accordingly. 
     Although it is contemplated that separate microprocessors can be employed for chair embodiments that include both an automatic height adjustment mechanism  20  and an automatic tilt adjustment mechanism  34 , it is preferred that a common microprocessor (e.g.,  26 ) be employed as the controller for both mechanisms, as shown in  FIG. 7 . Similarly, for chair embodiments including both an automatic height adjustment mechanism  20  and an automatic tilt adjustment mechanism  34 , it is preferred that a common load sensor (e.g.,  28 ) be employed for both mechanisms, as shown in  FIG. 7 . 
     Preferred biasing members for use in accordance with automatic tilt adjustment mechanisms embodying features of the present invention include but are not limited to springs, pneumatic devices, and hydraulic devices, with springs being especially preferred. Representative springs for use in accordance with the present invention include torsion springs (e.g., elastomeric torsion springs, coil springs, etc.), leaf springs, tension springs, compression springs, spiral springs, volute springs, and flat springs. Torsion springs of a type described in U.S. Pat. No. 5,765,914 to Britain et al. and U.S. Pat. No. 5,772,282 to Stumpf et al., and leaf springs of a type described in U.S. Pat. No. 6,250,715 to Caruso et al. are particularly preferred for use in accordance with the present invention. The contents of all three patents are incorporated herein by reference in their entirety, except that in the event of any inconsistent disclosure or definition from the present application, the disclosure or definition herein shall be deemed to prevail. 
     Preferred actuating members for use in accordance with torsion spring biasing members include torque levers, while preferred actuating members for use in accordance with leaf spring biasing members include fulcrum members. 
     Preferably, automatic tilt adjustment mechanisms embodying features of the present invention further include a transducer  42 , as shown in  FIG. 9 . The transducer  42  (e.g., a rotational or translational position transducer) senses when biasing member  38 , actuating member  44 , or any member mechanically coupled thereto (e.g., seat  14 , backrest  16 , etc.) has achieved a desired position, torque, or tension and then communicates the information to microprocessor  26 , which then disengages actuator  36 . For example, when biasing member  38  is a leaf spring and actuating member  44  is a fulcrum member, transducer  42  can be tied to the position of the fulcrum. Alternatively, when biasing member  38  is a torsion spring and actuating member  44  is a torque lever, transducer  42  can be tied to the torque lever used to torque the torsion spring. 
     As shown in  FIGS. 7 and 9 , biasing member  38  (e.g., a tilt adjustment spring) is mechanically coupled to actuator  36  by the intermediacy of a screw  44 , and spring  38  is coupled to a tilt link  46 . Thus, moving (i.e., stretching or releasing) spring  38  acts to increase or decrease the load on tilt link  46 , which in turn acts to increase or decrease the amount of back support provided to an individual by backrest  16 . The actuator  36  (e.g., a motor) continues to move spring  38  by the agency of screw  44  until such time as the position transducer  42  informs microprocessor  26  that spring  38  has achieved the target position and/or target tension and is thus providing the requisite degree of support. 
     In a third series of presently preferred embodiments, a desired default position for the seat  14  and/or backrest  16  of the chair  10 —unrelated to the weight and other physical characteristics of a potential user—may be determined a priori and programmed into the microprocessor  26 . In such embodiments, the transducer  42  would detect the angle of inclination of seat  14  and/or backrest  16 . Upon detecting a previous user rising from the chair or upon detecting a new user first occupying the chair (e.g., through the use of a load sensor, solenoid valve, or the like), microprocessor  26  will engage actuator  36 , which acts to restore seat  14  and/or backrest  16  to a default position until such time as the transducer  42  informs microprocessor  26  that a default angle of inclination has been achieved. 
     In a fourth series of presently preferred embodiments, the chair  10  includes a microprocessor  26  electrically coupled to a power source  18 , a memory device electrically coupled to the microprocessor  26 , and a control system  48  electrically coupled to the microprocessor  26 , shown in detail in  FIGS. 10 and 11 . The control system  48  preferably includes a digital display  50  and a user interface whereby a user can monitor and adjust chair settings (e.g., chair tilt, chair height, seat depth, armrest height, lumbar pressure, lumbar position, sacral support, spinal support, cranial support, thoracic support, foot support, leg support, calf support, etc.), activate a manual override mechanism to prevent automatic adjustments from being made, store new settings onto an encoded device, read saved settings from an encoded device, or the like. Preferably, the digital display  50  is touch sensitive, although it is also contemplated that control system  48  can include a keypad, keyboard, voice recognition system, tactile-activated switches and sensors (e.g., mechanisms that are activated according to the movements of a user in the chair), or the like, to allow for alternative methods of information entry. 
     The digital display  50  is electrically coupled to microprocessor  26 , which serves as a logic controller. Thus, commands entered by a user through one or more of the user interfaces described above will be conveyed to microprocessor  26  and executed. The touch-sensitive digital display  50  preferably provides selectable graphical images corresponding to each of the seating functions, adjustable parameters, and any other electronically controlled functions of the chair (e.g., tilt adjustment, height adjustment, manual override activation, etc.). In addition, the digital display  50  preferably enables manual fine-tuning of any automatically made adjustment. 
     In preferred embodiments, control system  48  further includes an encoded device reader  52 , which is capable of reading an individual&#39;s personalized setting information from an encoded device, such as a card. Preferably, the control system  48  further includes an encoded device writer  54 , which is capable of storing sets of preferred settings, and preferably multiple sets of preferred settings, onto an encoded device, such as a card, once they have been finalized by a user. 
     Thus, a user can quickly load personalized setting information stored on the card to any chair  10 , with the chair  10  then automatically adjusting to conform to the personalized setting information supplied by the card. 
     In such a manner, a system of chairs may be developed that includes a plurality of chairs  10 , each of which includes a microprocessor  26  coupled to a power source  18  (e.g., a fuel cell), an encoded device reader  52  electrically coupled to microprocessor  26 , and an encoded device writer  54  electrically coupled to microprocessor  26 . Thus, an individual present at a facility containing such a system of chairs will be able to quickly transform any of the chairs to conform to a set of preferred settings simply by inserting an encoded device on which the settings are stored into a card reader on any one of the chairs in the system. 
     In a fifth series of presently preferred embodiments, shown in detail in  FIG. 12 , the chair  10  includes a sound masking system  56  mounted thereto, which is electrically coupled to the power source  18  and to the microprocessor  26 . The sound masking system  56  includes one or more speakers  58 , which can provide a masking sound (e.g., white noise) that moves with a user, and which is not limited geographically to the particular workspace in which the user is located. The sound masking system  56  is controlled by the microprocessor  26 , and can be activated, deactivated, or adjusted through one or more of the user interfaces described above and/or encoded device reader  52 , or separately by way of a switch, button, or other control. It is noted that although  FIG. 12  shows sound masking system  56  located near the base  12  of chair  10 , it may be preferable, in certain embodiments, to position it elsewhere on the chair  10 , such as near the top of backrest  16  in proximity to the head of a user occupying the chair  10 . 
     Preferred fuel cells for use in accordance with the present invention include but are not limited to the types described hereinabove. For a comparison of several fuel cell technologies, see Los Alamos National Laboratory monograph LA-UR-99-3231 entitled Fuel Cells: Green Power by Sharon Thomas and Marcia Zalbowitz, the entire contents of which are incorporated herein by reference, except that in the event of any inconsistent disclosure or definition from the present application, the disclosure or definition herein shall be deemed to prevail. 
     Polymer electrolyte membrane (PEM) fuel cells and direct methanol fuel cells are especially preferred for use in accordance with the present invention, with PEM fuel cells being most preferred at present. As shown in  FIG. 13 , a fuel cell  62  may be attached to the chair  10  on an undersurface  60  of seat  14 . It is to be understood that the location of attachment of a fuel cell to an office component embodying features of the present invention is unrestricted, but is preferably such that the fuel cell is concealed from view (e.g., for aesthetics) and does not interfere with an individual&#39;s utilization of the office component. In addition, as described above, it is preferred that the fuel cell be attached to the office component rather than remote thereto in order to render the office component portable and self-sufficient vis-a-vis its power consumption. 
       FIG. 14  shows an office component  2  embodying features of the present invention that includes a fuel cell  62 , a fuel tank  64  connected to the fuel cell  62 , and a water reservoir  66  connected to a water outlet  68  of the fuel cell  62  and configured to receive water generated by the fuel cell  62 . For embodiments in which fuel cell  62  is a PEM fuel cell, fuel tank  64  may correspond to a cylinder containing hydrogen gas. 
     Preferably, the water reservoir  66  is readily detachable from the water outlet  68  to enable a user to periodically empty water collected therein. Alternatively, water reservoir  66  may preferably contain a desiccating material (e.g., sodium sulfate, silica gel, magnesium sulfate, etc.) that will react with and consume the water when it is generated. In a preferred embodiment, shown in  FIG. 15 , water generated by the fuel cell  62  is converted to humidity via passage through a vaporizer  70  connected to the water outlet  68  of fuel cell  62 . 
     In a sixth series of presently preferred embodiments, shown in  FIG. 16 , an office component  2  includes a power capacitor  72  electrically coupled to a fuel cell  62  remote to the office component  2 . A control member  74  is electrically coupled to the power capacitor  72  and to the remote fuel cell  62 . In this series of embodiments, power capacitor  72 , which may be a conventional storage battery, is used to power all of the electrically powered devices included in the office component until such time as a minimum power level set point of the power capacitor  72  is reached (e.g., the battery power is depleted or is nearing depletion). The control member  74  detects the minimum power level set point and activates the fuel cell  62  to recharge power capacitor  72 . When a maximum power level set point of the power capacitor  72  is reached (i.e., the battery is fully recharged), the control member  74  deactivates the fuel cell. 
     Alternatively, if an electrical coupling between remote fuel cell  62  and power capacitor  72  is undesirable or inconvenient (e.g., a connection via wires or cables is impractical), the control member  74  may be equipped to provide a visual (e.g., blinking LED light) or audio (e.g., beeping) signal indicating that the power capacitor  72  requires (or soon will require) recharging, such that a temporary electrical connection between the fuel cell  62  and the power capacitor  72  can be established. 
     In a seventh series of presently preferred embodiments, shown in  FIGS. 22-24 , an office component  2  includes an electrical outlet  102 , which is coupled to an inverter  104  (e.g., a DC to AC power inverter), which in turn is coupled to at least one of a fuel cell  62  and a power capacitor  72 . In this series of embodiments, DC current drawn either directly from a fuel cell  62  or from a power capacitor  72  (which is itself supplied with electricity by a fuel cell  62 ) may be converted to conventional AC electricity. This AC electricity may then be used to power any device that utilizes AC current. Representative devices include but are not limited to laptop computers and their chargers, cellular phones and their chargers, personal digital assistants (PDAs) and their chargers, and the like. All manner of inverters are contemplated for use in accordance with the present invention, including but not limited to modified sine power inverters, pure sine power inverters, 12-volt power inverters, 24-volt power inverters, and the like. 
     For embodiments in which the inverter  104  is coupled to a fuel cell  62 , the fuel cell  62  may either be attached to the office component  2 , as shown in  FIG. 22 , or remote to the office component  2 , as shown in  FIG. 23 . It is presently preferred that the fuel cell be attached to the office component rather than remote thereto such that that the office component is portable. Alternatively, as shown in  FIG. 24  the inverter  104  may be coupled to a power capacitor  72  that is electrically coupled to a fuel cell  62  remote to the office component  2 . As described above in connection with the sixth series of presently preferred embodiments, a control member  74  is preferably included in this arrangement in order to regulate the power level of power capacitor  72 . 
     Thus, the user of an office component (e.g., a chair) equipped in accordance with the seventh series of presently preferred embodiments shown in  FIGS. 22-24  would be able to utilize and/or charge the power supply of an electronic device (e.g., a laptop computer) without having to first locate a remote electrical outlet, such as a wall outlet, which might not be available in all environments. The incorporation of a self-sufficient electrical outlet directly into the office component is particularly advantageous in connection with portable office components embodying features of the present invention. 
     In the first series of presently preferred embodiments described above, the automatic height adjustment mechanism  20  includes a gear  24  rotatably connected to the actuator  22 , wherein the gear  24  rotates a height-adjustable shaft  30  connecting the seat  14  to the base  12  (e.g.,  FIGS. 7-8 ). However, alternative means for automatic height adjustment can be used instead, and lie within the scope of this invention. Examples include but are not limited to alternative mechanical mechanisms (e.g., a collapsible/expandable jack-like support base), as well as pneumatic and/or hydraulic methods. 
     In the second and third series of presently preferred embodiments described above, the automatic tilt adjustment mechanism  34  includes a biasing member  38  (e.g., a spring) that exerts a biasing force on at least one of the seat  14  and the backrest  16  (e.g.,  FIGS. 7 and 9 ). However, alternative means for automatic tilt adjustment can be used instead, and lie within the scope of this invention. Examples include but are not limited to a height-adjustable support shaft connecting the base  12  to the rear surface of backrest  16 , which when raised or lowered will decrease or increase, respectively, the angle of inclination of backrest  16 . 
     In the fourth series of presently preferred embodiments described above, the digital display  50  is shown as a screen attached to an arm of the chair  10  (e.g.,  FIGS. 5 ,  6 ,  10 , and  11 ). However, alternative means for visual display can be used instead, and lie within the scope of this invention. Examples include but are not limited to digital or mechanical tickers integrated into the structure of the chair (e.g., in an armrest), LED displays, and the like. Similarly, although the encoded device reader  52  and the encoded device writer  54  are shown as a slot into which a card is inserted (e.g.,  FIGS. 10-11 ), alternative means for reading stored information and alternative means for storing information can be used instead, and lie within the scope of this invention (e.g., wireless chip-containing rings, pens, etc.). Examples include but are not limited to encoding/decoding information using Magnetic Ink Character Recognition (MICR), Optical Character Recognition (OCR), bar codes, spot codes (e.g., fluorescent ink), perforations or notch systems, and magnetic wire Weigand-type systems. 
     In the fifth series of presently preferred embodiments described above, the sound masking system  56  is described as having one or more speakers  58 , through which a masking sound (e.g., white noise) is delivered (e.g.,  FIG. 12 ). However, alternative means for sound masking can be used instead, and lie within the scope of this invention. Examples include but are not limited to generators that create an electrical signal having a similar or identical frequency to that of a sound to be masked, but which is opposite in amplitude and sign. 
     It is emphasized that while specific electrically powered devices have been described for use in accordance with the present invention (e.g., automatic adjustment mechanisms, control systems, sound masking systems, etc.) it is contemplated that any type of electrically powered device or office accessory may integrated into an office component embodying features of the present invention. It is preferred that the power requirements of the electrically powered device will match the power output of the power supply used therewith. 
     Representative office accessories that are suitable for integration into an office component embodying features of the present invention include but are not limited to climate control systems (e.g., fans, humidifiers, dehumidifiers, heaters, etc.), cooling devices, virtual goggles, lighting systems, computers, telecommunication systems (e.g., telephones, cellular phones, video and/or internet conferencing, web cam integration, infrared transceivers, etc.), relaxation stimulation systems (e.g., back and/or body massagers, acoustic stimuli, aromatizers, etc.), biofeedback systems (e.g., electrocardiograms, pulse and/or respiration monitors, etc.), computer (laptop) docking stations with wireless LAN connections, wireless keyboards, wireless mice, computer flat screen integration, pencil sharpeners, staplers, Dictaphones, cassette recorders, PDAs, and the like, and combinations thereof. 
     A preferred design for a chair embodying features of the present invention incorporates one or more features of the ergonomic office chairs sold under the tradename AERON®. by Herman Miller (Zeeland, Mich.). Features of AERON® chairs that may be desirably incorporated into chairs embodying features of the present invention include but are not limited to: seats and backrests comprised of a form-fitting, breathable woven mesh membrane; one-piece carrier members for securing the periphery of the woven mesh membranes to the chair frames; mechanisms for controlling tilt range and resistance to tilting; and linkage assemblies by which seats and backrests may pivot about hip pivot points while simultaneously tilting rearwardly. Additional descriptions of these and other features may be found in the Stumpf et al. patent incorporated by reference hereinabove. 
     A seating structure embodying features of the present invention contains an electrical conduit electrically coupled to a power source, and one or more electrically powered devices coupled to the electrical conduit.  FIGS. 17-19  show seating structure  76  in accordance with the present invention that includes a base  78 , a seat  80  supported by the base  78 , and a backrest  82  connected to the seat  80 . Each of seat  80  and backrest  82  is desirably comprised of a form-fitting, breathable woven mesh material, such as that sold under the tradename PELLICLE® by Herman Miller. 
     The seating structure  76  shown in  FIG. 18  further contains a power source  84  and a tilt adjustment mechanism  86 . The tilt adjustment mechanism  86  preferably includes a motor  88 , a spring  90  coupled to the motor  88 , a microprocessor  92  electrically coupled to the motor  88 , and a control system  94  electrically coupled to the motor  88 . Preferably, the motor  88  is a reversible motor, such that spring  90  can be stretched or compressed (i.e., the tilt of seat  80  and/or backrest  82  can be increased or decreased) depending on whether motor  88  is operated in a forward or reverse direction. The direction of operation of motor  88  is controlled through touch-activated control system  94 , whereby pressure applied to a first touch-sensitive region  96  activates motor  88  in a forward direction, pressure applied to a second touch-sensitive region  98  activates motor  88  in a reverse direction, and pressure applied to a third touch-sensitive region  100  deactivates motor  88 . 
     It is to be understood that the location of elements shown in  FIGS. 17-19  is merely representative, and that manifold alternative configurations lie within the scope of the present invention. For example, the control system  94  may be attached to an armrest of seating structure  76  or to some portion of the backrest  82 , as opposed to a side of seat  80 . Furthermore, it is to be understood that a seating structure embodying features of the present invention may include one or more alternative electrically powered devices in addition to or instead of the tilt adjustment mechanism  86  depicted in  FIGS. 17-19 . For example, the seating structure  76  may include an automatic tilt adjustment mechanism, whereby adjustments to the seat  80  and/or backrest  82  are made automatically based on the specific weight of an individual user, as described hereinabove. 
       FIG. 20  shows a front view of the tilt adjustment mechanism  86 . The motor  88  is connected to a shaft  87  that is connected in turn to a first bevel gear  89 . The first bevel gear  89  meshes with a second bevel gear  91 , such that when the first bevel gear  89  is turned by the agency of shaft  87 , a screw  93  is turned, thereby modulating tilt. In an alternative embodiment, shown in  FIG. 21 , the motor  88  is connected directly to the screw  93 , thereby facilitating concealment of motor  88  within a portion of base  78 . 
     A method of using a chair embodying features of the present invention includes storing personalized chair settings on an encoded device, and reading the personalized chair settings using an electrically powered control system connected to the chair, which is configured to receive electricity generated by a fuel cell. The method optionally further includes one or more of automatically adjusting the chair to achieve the personalized chair settings (e.g., automatically adjusting chair tilt, automatically adjusting chair height, etc.), storing a plurality of personalized chair settings onto the encoded device, and automatically adjusting a plurality of chairs to achieve a plurality of personalized chair settings (which are the same or different). 
     The manner in which an office component embodying features of the present invention is made, and the process by which it is used, will be abundantly clear to one of ordinary skill in the art based upon a consideration of the preceding description. However, strictly for the purpose of illustration, a table is provided below (Table 1), which identifies representative manufacturers of representative components useful in accordance with the present invention. It is to be understood that a great variety of alternative components available from alternative manufactures are readily available and can be used in place of the ones identified. TABLE-US-00001 TABLE 1 Component Supplier Model Description Height Generic Generic—Adjustment Motor Bosh CHP DC motor with a gear assembly. With a 52:2 reduction. 24 V/53 W Tilt Bosh CEP DC motor with a gear assembly. Adjustment With a 79:1 reduction. Motor 23 V/23 W Position Generic Generic—Transducer Linear Space Age Series Analog output, 1 turn 100 conductive plastic potentiometer. 1.5 in. max travel. Rotational Bei Dunca Generic Rotary sensors with resistive technology using wirewound &amp; hybrid coils. Fuel Cell Generic Generic—Battery Dewalt DW0240 Rechargeable 24 V/240 W battery. Nickel and Cadmium. Load Cell Generic Generic—Card Yuhina ACR30 Smart card reader/writer or Reader Equivalent RS232 Card Siemens SLE Stores Positional Information. 4428 Good portability of data. Data can quickly be stored and loaded from the card. Sound Cambridge—System Speakers Cambridge—Software Cambridge—Patent Cambridge—Reference/Cambridge 
     The foregoing detailed description has been provided by way of explanation and illustration, and is not intended to limit the scope of the appended claims. Many variations in the presently preferred embodiments illustrated herein will be obvious to one of ordinary skill in the art, and remain within the scope of the appended claims and their equivalents.