Abstract:
A cell phone for use in making and receiving telephone calls which uses a Piezo transducer as an earphone.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. Field of the Invention  
           [0002]    A cell phone of improved construction which has a Piezo transducer earphone.  
           [0003]    2. Description of the Prior Art  
           [0004]    The proliferation of analog cell phones with magnetic transducer ear phones, has resulted in increased interest in the possibility that their use can result in increased numbers of brain tumors as a result of the radio frequency (RF) waves generated during their use.  
           [0005]    It is known that the magnetic transducers in cell phones produce a magnetic force field which can be detected.  
           [0006]    It is thought that the ear phone magnetic force field resonates with the cell phones radio transmission force fields, and the earth&#39;s field magnetic ambient, which may affect the user&#39;s brain cells and may cause cancer.  
           [0007]    Various studies of the effects of radiation on cells have been conducted such as those by Dr. Reba Goodman, Department of Pathology, Columbia University Health Sciences, New York, N.Y., That include effects ranging from increased enzyme reaction rates to increased transcript levels for specific genes.  
           [0008]    While the effects of the RF waves generated by cell phones on the brain cells of the user are debated, the generation of these waves is not disputed.  
           [0009]    Various proposals for shielding users from RF waves have been considered, however, none of them solve the problem, Examples of patents that relate to the subject matter are U.S. Pat. Nos. 6,109,530; 6,134,336; 6,058,315; 6,144,861; 5,201,069; 4,626,729; 4,597,099; 6,134,336; and 6,109,530.  
           [0010]    The improved cell phone construction of the invention uses a Piezo transducer as its earphone, which eliminates RF waves and provides other positive advantages,  
         SUMMARY OF THE INVENTION  
         [0011]    It has now been found that an improved cell phone which eliminates the magnetic force field generated by the magnetic transducer ear phone of the cell phone is obtained by using a Piezo transducer ear phone.  
           [0012]    The principal object of the invention is to provide improved cell phone construction, which eliminates the magnetic force field effect of magnetic transducers by using Piezo transducers as the cell phones&#39; ear phone.  
           [0013]    A further objective of the invention is to provide improved cell phone construction which is simple and inexpensive to construct.  
           [0014]    A further object of the invention is to provide improved cell phone construction which lends itself to mass production.  
           [0015]    A further object of the invention is to provide improved cell phone construction that can be used with old or new cell phones.  
           [0016]    Other objects and advantageous features of the invention will be apparent from the description and claims.  
       
    
    
     DESCRIPTION OF THE DRAWINGS  
       [0017]    The nature and characteristic features of the invention will be more readily understood from the following description taken in connection with the accompanying drawings forming part hereof in which;  
         [0018]    [0018]FIG. 1 is a pictorial view of a conventional cell phone;  
         [0019]    [0019]FIG. 2 is a view similar to FIG. 1 illustrating a cell phone embodying the improved construction of the invention;  
         [0020]    [0020]FIG. 3 is a pictorial view showing a representation of the magnetic wave form generated by a conventional cell phone;  
         [0021]    [0021]FIG. 4 is a view similar to FIG. 3 showing the lack of magnetic waves from a cell phone constructed in accordance with the invention, and;  
         [0022]    [0022]FIG. 5 is a pictorial diagram of apparatus for detecting the electromagnetic background and electromagnetic fields, present, and emanating from a cell phone. 
     
    
       [0023]    It should, of course, be understood that the description and drawings herein are merely illustrative and that various modifications, combinations and changes can be made in the structures disclosed without departing from the spirit of the invention.  
       DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0024]    When referring to the preferred embodiment, certain terminology will be utilized for the sake of clarity. Use of such terminology is intended to encompass not only the described embodiment, but also technical equivalents which operate and function in substantially the same way to bring about the same result.  
         [0025]    Referring now more particularly to the drawings and FIGS. 1 and 3 thereof a cell phone  10  is therein illustrated, which has an outer housing  11 , an antenna  12  and a Piezo microphone  14 . The cell phone  10  also includes conventional enabling electrical circuitry (not shown) and a battery (not shown). The cell phone  10  is shown adjacent the head  20  of a user, with an earphone  21  of the magnetic transducer type adjacent the ear  22  of the user.  
         [0026]    The earth ambient electromagnetic field present at the users location is indicated by arrow  23 , and the modulated cell phone radio frequency electromagnetic field produced by use of the cell phone  10  is indicated by arrow  24 . The magnetic modulated electromagnet field emitted by the magnetic earphone  21  of the cell phone is indicated by arrow  25  and travels directly into the brain cells (not shown) of the user.  
         [0027]    Referring to FIG. 5, the electromagnetic waves present in the space around the user, ambient as well as emitted waves from the use of the cell phone, are detected by an apparatus  26  of well known type and recorded on an oscilloscope  30 . As shown in FIG. 3, the audio wave form  31  is shown adjacent the bottom of the oscilloscope  30 , and the magnetic electromagnetic wave form  32  is shown adjacent the top of the oscilloscope. The magnetic wave form  32  is the result of the modulated electromagnetic field emitted by the earphone  21 , and the effect on it by the ambient electromagnetic field present around the user. The resultant wave form  32  is thought to have a harmful effect on the user&#39;s brain cells, the results of which are still being investigated.  
         [0028]    Referring now to FIGS. 2, 4 and  5 , a cell phone  50  is therein illustrated. The cell phone  50  is of similar overall construction to that of cell phone  10 , with an outer housing  51 , an antenna  52  and a Piezo microphone  53 . The cell phone  50  also includes conventional electric enabling circuitry (not shown) and a battery (not shown).  
         [0029]    The cell phone  50  is shown adjacent the head  55  of a user, with an ear phone  56  adjacent the ear  57  of the user. The earth ambient electromagnetic field is indicated by arrow  23 , and the modulated cell phone radio frequency electromagnetic field is indicated by arrow  24 .  
         [0030]    The earphone  56  is a Piezo transducer of well-known type such as #40-1218-ceramic bimorph driver element available from Radio Shack.  
         [0031]    While the earphone  56  is illustrated inside the cell phone housing, it could also be of the auxiliary or plug-in type.  
         [0032]    Referring to FIG. 4 the audio wave form  60  detected by apparatus  26 , is shown adjacent the bottom of oscilloscope  30 , and the wave form  61  that would result from the Piezo transducer earphone  56  is shown as a flat line, indicating that no electromagnetic field was emitted by the Piezo transducer earphone  56 .  
         [0033]    It will thus be seen that improved cell phone construction has been provided with which the objects of the invention are achieved.