Abstract:
An article of manufacture, such as a jacket or backpack, integrates the services of an audio delivery device, such as an MP3 player, with the services of a two-way communication device, such as a mobile phone, or a two-way radio such as a walkie talkie, citizen band radio, HAM radio, marine or aviation radio, and the like. The article integrates the reception and provision of input and output signals from both the audio devices within the article, thereby enabling a user to listen to music or to receive and place phone calls while engaged in activity. In one implementation, the article provides these functions by holding one or more devices for communicably connecting and switching the audio and communication devices, mixing signals received therefrom, and optionally enabling a user to reduce the volume or mute the signals as desired.

Description:
The present invention is a continuation-in-part of U.S. patent application Ser. No. 11/548,195, filed on Oct. 10, 2006, entitled “PERSONAL PORTABLE INTEGRATOR FOR MUSIC PLAYER AND MOBILE PHONE,” which is a continuation of U.S. patent application Ser. No. 10,382,960 (now U.S. Pat. No. 7,187,948), of the same title, which claims the benefit of priority to U.S. Provisional Patent application No. 60,370,711, filed Apr. 9, 2002, entitled “SPLIT STYLE HEADPHONES.” The entire content of each of the above-mentioned patent applications is incorporated by reference herein. 
    
    
     BACKGROUND OF THE INVENTION 
     1. The Field of the Invention 
     This invention relates to integrating electronic devices and, more particularly, to novel systems and methods for integrating services provided by personal music players and mobile phones. 
     2. The Background Art 
     The use of mobile telephones and other wireless communication devices has increased dramatically in recent years. Likewise, electronic music players, such as MP3, CD, DVD, and like players have proliferated. Some companies have attempted to integrate music players and mobile two-way communication devices into single devices. While integration may reduce the number of devices a user is required to carry, a user may unnecessarily discard devices that are still fully functional, incurring unnecessary expense. 
     With respect to music players and mobile phones, various conflicts may arise when attempting to operate independent devices simultaneously. For example, users may listen to portable music players while exercising, traveling, working, relaxing, and performing like activities. However, users may desire to simultaneously place and receive phone calls, activities that may be inherently difficult to perform while listening to music or other audio material. For example, a user may be unable to hear a phone ring while listening to music using headphones, earphones, or the like. Moreover, if a user is able to accept a call, the user may be required to remove headphones, reduce the volume of or mute a music player, pick up a mobile phone handset, or like actions, in order to accept or place a call. This may be an excessively clumsy process. 
     What is needed is apparatus and methods for users to simultaneously accept and place phone calls using a mobile phone or other two-communication device while listening to music, or other audio material using an independent audio delivery device. 
     What is further needed is apparatus and methods to integrate the services of substantially any arbitrary two-way communication device with substantially any arbitrary music or audio delivery device. 
     SUMMARY OF THE INVENTION 
     Embodiments of the present invention include apparatus and methods for integrating two-way communication devices with audio delivery devices, and within one or more articles of manufacture, such as a jacket, backpack, helmet, or the like. An apparatus in accordance with the invention may include a first electrical connector connected to receive a first audio signal from a substantially arbitrarily selectable audio delivery device, such as an MP3, CD, DVD, radio, or other media player. A second electrical connector may be connected to receive a second audio signal from a substantially arbitrarily selectable two-way communication device, such as a mobile phone, or a two-way radio such as a walkie talkie, citizen band radio (e.g. CB), HAM radio, marine and aviation radio, and the like. 
     A coupling device independent from the audio and two-way communication devices may be connected to receive the first and second audio signals. A third audio signal comprising at least one of the first and second audio signals may be transmitted from the coupling device to an acoustic device, such as headphones, earphones, speakers, or the like to convert the third audio signal to an acoustic wave having an audio range corresponding to a hearing range of a user. 
     In certain embodiments, a switch may be connected to the apparatus to enable a user to selectively switch between the first and second audio signals to provide the third audio signal to the acoustic device. In other embodiments, a mixer may be connected to the apparatus to mix the first and second audio signals to create the third audio signal. In selected embodiments, the apparatus may include a microphone connected to transmit a voice signal of a user to the two-way communication device. Thus, the two-way communication device may be located away from the face of the user. The apparatus may also include a volume controller connected to selectively control the volume of at least one of the first and second audio signals. In certain embodiments, the volume controller may control the first audio signal (e.g. the audio signal originating from the audio delivery device) so that a user may selectively raise or lower the volume of the music or other media while receiving or placing a call. 
     In selected embodiments, the apparatus may employ electrical wiring to route the audio signals and the voice signal to and from the coupling device. A switch, selectively operable by a user, may be used to connect at least two of the second audio signal wire, the voice signal wire, and a ground wire, to activate a function of the two-way communication device. For example, if the two-way communication device is a mobile phone, the switch may be used to trigger a function of the mobile phone such as a mute command, a call connect command, a call disconnect command, voice-activated dialing, a command to call the last number dialed, and the like. 
     The coupling device may contain any or all of the hardware previously described including but not limited to the microphone, the switches, the mixer, and the volume controller. In selected embodiments, the audio signal from the two-way communication device may be characterized by a threshold value. The second audio signal may be accorded priority relative to the first audio signal originating from the audio delivery device. Thus, the second audio signal may interrupt the first audio signal upon reaching the threshold value. 
     An article of manufacture, such as a jacket, backpack, helmet, or the like, can then be configured to receive the two-way communication device, the audio delivery device, the coupling device, one or more wires (as appropriate), and one or more headphones, earphones, speakers. In some cases, one or more of the two-way communication device, the audio delivery device, and the one or headphones, earphones, or speakers communicate with each other through the coupling device using wireless communication means. These can also communicate via a combination of wired and wireless communication means. 
     Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The features and advantages of the invention may be realized and obtained by means of the instruments and combinations particularly pointed out in the appended claims. These and other features of the present invention will become more fully apparent from the following description and appended claims, or may be learned by the practice of the invention as set forth hereinafter. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The objects and features of the present invention will become more fully apparent from the following description, taken in conjunction with the accompanying drawings. Understanding that these drawings depict only typical embodiments of the invention and are, therefore, not to be considered limiting of its scope, the invention will be described with additional specificity and detail through use of the accompanying drawings in which: 
         FIG. 1  is a plan view of one embodiment of a personal portable integrator usable with a music player and a mobile phone; 
         FIG. 2  is a plan view of one embodiment of a personal portable integrator having a device-specific link to a two-way communication device; 
         FIG. 3  is a schematic block diagram illustrating one embodiment of connectors that may be used to adapt the invention to a wide variety of devices; 
         FIG. 4  is a schematic block diagram of one embodiment of an adapter that may be used to interface to a specific device; 
         FIG. 5  is a schematic block diagram of one embodiment of components contained within a coupling device in accordance with the invention; 
         FIG. 6  is a schematic block diagram of an alternative embodiment of components contained within a coupling device in accordance with the invention; 
         FIG. 7  is a schematic block diagram of another alternative embodiment of components contained within a coupling device in accordance with the invention; 
         FIG. 8  is a schematic block diagram of one embodiment of a personal portable integrator usable with a music player and a mobile phone using wireless technology; 
         FIG. 9A  illustrates one implementation of an article of manufacture that is configured to integrate a music player and a mobile phone using wired or wireless technology; and 
         FIG. 9B  illustrates another implementation of an article of manufacture that is configured to integrate a music player and a mobile phone using wired or wireless technology. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     It will be readily understood that the components of the present invention, as generally described and illustrated in  FIGS. 1 through 8  herein, could be arranged and designed in a wide variety of different configurations. Thus, the description herein is not intended to limit the scope of the invention, but is merely representative of certain presently preferred embodiments of devices and systems in accordance with the invention. Those of ordinary skill in the art will, of course, appreciate that various modifications to the details herein may easily be made without departing from the essential characteristics of the invention, as described. Thus, the following information is intended only by way of example, and simply illustrates certain presently preferred embodiments consistent with the invention. 
     Referring to  FIG. 1 , a portable integrator  10  for use with a two-communication device  18 , such as a mobile phone  18 , and an audio delivery device  16 , such as a portable MP3 player or CD player, may include electrical connectors  12 ,  14  to interface with the devices  16 ,  18 . The electrical connectors  12 ,  14  may vary according to the device. For example, an audio device  16  may require a jack  12  having specific dimensions and with a specified number of contact points. Likewise, a connector  14  may connect to a particular communication device  18 . The connectors  12 ,  14  may be modified as needed to adapt to other devices  16 ,  18 . 
     The connectors  12 ,  14  may be adapted to receive and provide signals  13 ,  15 ,  17  from the devices  16 ,  18 . For example, the connector  12  may simply receive an audio signal  13  from the audio device  16 . The signal  13  may be a monophonic, stereophonic, or like representation of an audio signal  13 . Likewise, the connector  14  may receive an audio signal  15  from the communication device  18 . In addition, the connector  14  may provide a voice signal  17 , or other input signal  17 , to the communication device  18  from a user thereof or other outside source. 
     Sheathed flexible wires  20 ,  22  or other transmission means such as optical fibers  20 ,  22 , or wireless technology such as BLUETOOTH, may be used to carry the signals  13 ,  15 ,  17  to and from the devices  16 ,  18 . In certain embodiments, a reinforcement member  24  may be used to provide strength at a junction point  24  of the lines  20 ,  22 . The reinforcement member  24  may also be used to form a transition point  24  where wires  20 ,  22  may be bundled together beneath a single protective sheathing  26 . 
     A coupling device  28  may receive and transmit the signals  13 ,  15 ,  17  through the path  26 . The coupling device  28  may act as a controller  28  or hub  28  to route the signals  13 ,  15 ,  17  to an acoustic device  30 ,  32 , such as headphones  30 ,  32 , earphones  30 ,  32 , speakers  30 ,  32 , or the like. The coupling device  28  may also contain a microphone  29 , thus providing a hands-free set  29 ,  30 ,  32 , usable with a mobile phone  18 . A pair of wires  34 ,  36  or other communication paths  34 ,  36  may connect the coupling device  28  to the acoustic device  30 ,  32 . 
     Referring to  FIG. 2 , as was previously mentioned, devices  16 ,  18 , such as mobile phones  18 , may not use a standardized jack  12 ,  14 . However, it may be undesirable to provide a separate integrator device  10  for each variation of devices  12 ,  14  that may be available. Therefore, in certain embodiments, a portion  38  of the portable integrator  10  may be provided as a universal component  38  while another portion  40  may serve as a device-specific component  40 . For example, audio devices  16  may use a standardized connector  12  or jack  12 . 
     Therefore, a universal component  38  may adapt to the vast majority of audio devices  16  that may be available. Conversely, many two-way communication devices  18 , such as mobile phones  18  may not have standardized connections  14 . Therefore, device-specific components  40  may be provided having a standard connection  42  that may interface with the universal component  38 , while another adapter  14  or connector  14  may be specific to the device  18 . 
     In cases where devices  18  may have a varying number of inputs  17  and outputs  15 , dead pins, wires (communication paths), and the like may by used as needed to increase or decrease the number of inputs  15  or outputs  17  according to specific devices  18 . In addition, a user may only desire to use a single device  16  for a given period of time and may wish to remove the portion  40  until it is needed. 
     Referring to  FIG. 3 , while continuing to refer generally to  FIGS. 1 and 2 , adaptability of the integrator device  10  may be provided in various ways. For example, in certain embodiments, the integrator device  10  may include an adapter  44  that may provide an interface  44  to each of the devices  12 ,  18 ,  28 , specifically through one or more individual interfaces  45   a ,  45   b , and  45   c . In selected embodiments, a connection  20  to an audio device  16  may be swapped at interface  45   a  with another connection  20  fitted for another device, a connection  22  to a communication device  18  may be swapped at interface  45   b  with another connection  22  fitted for another communication device  18 , a coupling device  28  and an acoustic device  30 ,  32  may be swapped at interface  45   c  with other devices  28 ,  30 ,  32 , and the like. As was previously mentioned, certain portions  26 ,  20 ,  22  may be added or deleted as needed by the user. The adapter  44  may use a variety of connectors  42 ,  46 ,  48  to connect to the adapter  44 , and may also be configured to communicate wirelessly through each of interfaces  45   a ,  45   b , and  45   c . In particular, in certain embodiments, the adapter  44  may wirelessly communicate with each of the devices  16 ,  18  using a wireless technology, thereby acting as a wireless communication hub  44 . 
     Referring to  FIG. 4 , in selected embodiments, adapters  50  may be provided in accordance with the invention to adapt a portable integrator  10  to specific devices  18 . For example, an adapter  50  may include an interface  52  for interfacing with a connector  14 . Likewise, the adapter  50  may include another interface  54  that may connect directly to a device  18  at an input  56 . In addition, other features may be built into the adapter  50  such as impedance matching, signal amplification, and the like. 
     Referring to  FIG. 5 , in certain embodiments, the coupling device  28  may include a switch  58  to selectively enable a user to connect one of the signals  13 ,  15  through to the output  60 . For example, a user may listen to an audio recording or live transmission from an audio device  16  with the switch  58  in a first position  62 . If the user receives or desires to place a call, the switch  58  may be changed to a second position  64  to connect the communication device  18  through to the output  60 . The switch  58  may include a button  63  or like mechanism  63  to enable a user operation thereof. Thus, the signal  13  from the audio device  16  may be conveniently and selectively disconnected while the user operates the communication device  18 . In this way, simple operation of a switch  58  may enable a user to operate an audio delivery device  16  and a communication device  18  through a single acoustic device  30 ,  32 . 
     The coupling device  28  may also include a microphone  29  to transmit a voice or other audio signal  17  back to the communication device  18 . The coupling device  28  may contain one or several apertures to permit an acoustic wave to directly enter and drive the microphone  29 . In certain embodiments, the coupling device  28  may be located, such as by clipping, proximate the face of a user so that the switch  58 , microphone  29 , and other controls located therein, may be easily accessed and used by a user. Likewise, the communication device  18  and audio device  16  may be located away from the user&#39;s face, clipped along a belt line, in a pocket, in a bag, or the like. 
     Referring to  FIG. 6 , in certain embodiments, the coupling device  28  may include a mixer  66  to mix the audio signals  13 ,  15  originating from the audio and communication devices  16 ,  18 . Thus, the audio signals  13 ,  15  may be heard simultaneously by a user through an acoustic device  30 ,  32 . In certain instances, a ring or other sound may indicate a call is being received by the communication device  18  and may by audible over the sound of the music or other media through the acoustic device  30 ,  32 . In this case, the audio signal  13  from the audio device  16  may be muted or disconnected by a user with a switch  58  while the user receives or places a call. Once the call is finished, the user may once again trigger the switch to begin listening to music or other audible media. Thus, a user may simultaneously hear and monitor both devices  16 ,  18  through a single acoustic device  30 ,  32  and may mute or disconnect at least one of the devices  16 ,  18  when needed. 
     In certain embodiments, the coupling device  28  may also include a switch  68  or other control device  68  to control features of the communication device  18 , the audio device  16 , or a combination thereof. For example, a switch  68  may connect inputs  17  or outputs  15  of the communication device  18  together, connect them to a ground  70 , provide control signals to the device  18 , or the like, to control features of the communication device  18 . For example, a switch  68  or control device  68  may control features of the communication device  18  such as performing a mute command, a call connect command, a call disconnect command, voice-activated dialing, a command to call the last number dialed, or like features. The features activated may vary from device  18  to device  18  and may depend on the device engineering and configuration. 
     Referring to  FIG. 7 , in selected embodiments, the coupling device  28  may include a volume controller  72  to control the volume of at least one of the audio signals  13 ,  15  from the audio device  16  and the communication device  18 . For example, as in the previous example, a mixer  66  may provide that audio signals  13 ,  15  be heard simultaneously by a user through an acoustic device  30 ,  32 . When a call is received or placed on the communication device  18 , a user may adjust the volume of the audio signal  13  using the volume controller  72 . If desired, the user may adjust the volume such that music or audio material is still heard in the background while receiving or placing a call. Once a call is finished, a user may readjust the volume to a desired level. Thus, a user may simultaneously hear and monitor both devices through a single acoustic device  30 ,  32 , and may adjust the volume of at least one of the devices  16 ,  18  when desired. 
     Referring to  FIG. 8 , in certain embodiments, a coupling device  28  may be divided into a pair of components  28   a ,  28   b  that wirelessly communicate with one another over one or more individual or combined interfaces  45   c  using a technology such as BLUETOOTH. For example, a first component  28   a  may include a transceiver  28   a  receptive to the signals  13 ,  15 ,  17  from the audio and communication devices  16 ,  18 . The transceiver  76  may convert these signals to wirelessly transmittable frequencies  80  using an appropriate wireless protocol such that they may be transmitted to a peer transceiver  78 . The transceiver  78  may then convert the frequencies  80  back to signals  13 ,  15 ,  17 , where they may be processed by the coupling device  28   b  in accordance with a process like those described in  FIGS. 5 through 7 . 
     One of ordinary skill in the art will recognize that the wireless technology described in  FIG. 8  may be used in a wide variety of different configurations and the example presented herein is not intended to limit the scope of the invention. For example, in certain embodiments, portions or all of the circuitry  29 ,  66 ,  72  or components  29 ,  66 ,  72  may be located in the housing  28   a . In other embodiments, each of the devices  16 ,  18 , may communicate wirelessly with the coupling device  28   a  at interfaces  45   a  and  45   b.    
     Still additional embodiments in accordance with the present invention relate to how the technology described herein can be used with, formed in, or otherwise removably coupled to various articles of manufacture for additional personal portability and convenience. For example, the device and technology described herein can be integrated seamlessly in an article of manufacture such as a jacket, coat, backpack, belt pack, helmet (or other head gear), shirt, pants, or the like. That is, the article (e.g.,  100 ,  105 ,  FIGS. 9A-9B ) can be manufactured to include a number of internal or external pockets, receptacles, or channels for receiving various aspects of the device(s), wire(s), or control(s), such that the audio reception and transmission technology appears to be part of the article itself. The device can then be used with relative ease and comfort so that the user need not necessarily avoid use of the devices in difficult conditions, such as when skiing or biking, which could make the devices difficult to hold. 
     For example, as shown in  FIGS. 9A-B , article  100 ,  105  has at least a first interface  45   a  of coupling device  44  for receiving communication from music player  16  (such as a portable MP3 player, tape player, CD player, or the like). This interface  45   a  can be a wired interface for receiving a stereo plug of any size, but can also be a wireless interface for receiving and/or transmitting wireless communication. In addition, article  100 ,  105  can include a second interface  45   b  for receiving a second audio signal from a substantially arbitrarily selectable two-way communication device  18 . For example,  FIGS. 9A-B  show that coupling device  44  is communicably coupled to mobile phone  18  via wire  22 . As with interface  45   a , however, interface  45   b  can also be configured with primarily wireless communication means for communicating audio signals to and/or from device  18 . 
     Article  100  can also include a third interface  45   c  for transmitting (and/or receiving) a third  60  audio signal comprising at least one of the first and second audio signals. For example,  FIGS. 9A and 9B  show that coupling device  44  receives audio signals from devices  16  and  18 , and can send a third audio signal (one of the received first or second signals, or a combined first and second audio signal) through wires  26 . As with interfaces  45   a - b , third interface  45   c  can also send the third audio signal wirelessly, where appropriate, to corresponding acoustic devices. 
     In addition, article  100  can include acoustic device  30 ,  32 , which can convert the audio signal from interface  45   c  into audible tones for article  100 ,  105  wearer. Acoustic device  30 ,  32  can be personal speakers that are inserted in (or built to surround) an ear, or can be larger speakers that are audible up to several feet away. 
     Additional embodiments of the invention can be shown or described in terms of inside and/or outside portions. For example,  FIGS. 9A and 9B  show that article  100 ,  105  includes a primarily inside portion  110  and a primarily outside portion  115 . Inside portion  110 , such as the inside of jacket  100  or backpack  115 , further includes one or more receptacles (or pockets)  103   a - b  configured to receive an audio delivery device  16  and/or a two-way audio communication device  18 . For example, pockets/receptacles  103   a - b  in  FIGS. 9A-9B  provide a secure resting place for audio delivery device  16  and mobile phone  18  within inside portion  110 . 
     The article can also include a number of interfaces (not shown)  120  attached to the outside portion  115  for controlling any number of functions. The interfaces  120  can be communicably coupled to coupling device  44  via any number of wires (e.g.,  23 ), or via wireless communication means. The interfaces  120  can provide direct communicative access to switch  58  and volume controller  72  inserted in a pocket (or sewn into) a sleeve, or directly coupled thereto. Switch  58  and volume controller  72  of interfaces  120  are, in turn, communicably connected to coupling device  28 ,  44 ,  54 , via wire  23 , so that the user can toggle between music selections, toggle between the music player or the mobile phone, control volume, or the like. 
     As shown, article  100  also include one or more wires  20 ,  22 ,  26 ,  34 ,  36  embedded (e.g., formed, prepared, or otherwise sewn) therein for communicating an audio signal  13 ,  15 ,  17 ,  60  from a first point to a second point. For example, jacket  100  or backpack  105  can be formed with one or more channels  21  for holding a wire that connects the audio delivery device to a coupling device  28 ,  44 . Channels  21  can be a separate piece of fabric that is sewn to the inside portion  110  for the entire length of the corresponding wire. Alternatively, the one or more channels  21  can comprise holes, notches, or clips on in the inside portion  110  or outside portion  115 , which can secure the one or more wires at specific points. In any event, there need not necessarily be a wire and corresponding channel  21  for each device, or for an entire length of wire, used with the article, particularly where some devices may communicate to a coupling device  28 ,  44 ,  54  via wireless communication. 
     In addition, still another embodiment in accordance with the present invention includes an article  100 ,  105  including a first pocket  103   a  having an audio delivery device  16  inserted therein. Article  100 ,  105  also includes a second pocket  103   b  having a two-way communication device  18  inserted therein. Article  100 ,  105  still further includes a third pocket  103   c  for receiving an audio communication hub  28 ,  44 ,  54  which has one or more interfaces  45   a - c  for communicating with the audio delivery device and with the two-way communication device  18 . 
     The audio communication hub  28 ,  44 ,  54  can be connected directly to each audio device via electrical wiring  20 ,  22 ,  26 ,  34 ,  36  embedded in the article  100 ,  105 ; or can be connected wirelessly via any number of wireless communication protocols. For example, as previously stated, article  100 ,  105  can include one or more channels  21  formed therein for receiving at least one communication wire  20 ,  22 ,  26 ,  34 ,  36 . Alternatively, article  100  can be configured to provide electrical communication via wires only to the mobile phone  18  or to the audio delivery device  16 , and be further configured communicate with a communication hub  28 ,  44  using BLUETOOTH, or another wireless communication protocol. 
     Thus, for example, the articles  100  and  105  could alternatively be represented without one or both of wires  20  and  22 . Furthermore, wire  23  can also be omitted, in the event interface  120  is configured to remotely and/or wirelessly control audio communication hub  28 ,  44 ,  54 . Thus, audio communication hub  28 ,  44 , or  54  can be configured to receive and transmit wireless signals to and/or from a number of devices  16 ,  18 ,  120 , etc. in a given article  100 ,  105 , etc. In one implementation, this can allow a given user to have access of a device via headphones  30 ,  32  simply by inserting a given audio delivery device in a given pocket. In the case of using a BLUETOOTH enabled audio communication hub  28 ,  44 , or  54 , if the user has registered a mobile phone  18  with the audio communication hub, the user will likely be able to begin immediate communication through the cell phone simply by placing the mobile phone  18  into pocket  103   a  or  103   b , as appropriate. 
     Accordingly, there are a number of ways in which a personal article can be configured to integrate multiple forms of audio communication, to thereby fuse various devices and protocols with wearable materials. In particular, in addition to jackets, backpacks, belt packs, or helmets, other articles that can integrate this technology include shirts, pants, shoes, eyewear, goggles, sunglasses, caps, or the like. Even the headphones themselves can be configured to completely integrate an audio communication hub  28 ,  44 , or  54 , which can eliminate one or more of the wires  20 ,  22 ,  23 , and/or  26  illustrated herein. As described above, this can allow a user to use a headphone device configured with wireless communication simply by bringing the given audio delivery device in  16 ,  18 , etc. within an appropriate range or distance. Accordingly, as audio and switching devices become smaller and more lightweight, the options for incorporating the portable integration technology into other wearable items are essentially limitless. 
     The present invention may therefore be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects only as illustrative, and not restrictive. The scope of the invention is, therefore, indicated by the appended claims, rather than by the foregoing description. All changes within the meaning and range of equivalency of the claims are to be embraced within their scope.