Abstract:
An owl hooter game call having dual sound chambers arranged in series therein where each sound chamber has a centrally disposed air passage therethrough and one of the sound chambers having a diameter which is larger than the diameter of the other sound chamber.

Description:
FIELD OF THE INVENTION 
     The present invention generally relates to game calls and even more particularly relates to game calls for producing owl hoots. 
     BACKGROUND OF THE INVENTION 
     In the past, designers of owl hooting game calls have endeavored to provide more realistic sounding calls. Some designers have attempted to produce an owl hooter call using a simple “reed-in-a-tube” design, much like a typical duck call. 
     While these calls may have cost advantages, they also have significant drawbacks. 
     The sound of an owl hooting is distinct from other common animal made noises. Owl hoots are often loud and any emulation of an owl hoot would need to be realistic at high volume levels. Prior art designs have often failed at simultaneously producing both high volume levels and high levels of realism and others have been very difficult to operate, especially by a novice call operator. 
     Consequently, there exists a need for improvement of owl hooting game calls. 
     SUMMARY OF THE INVENTION 
     It is an object of the present invention to provide an owl hooter game call having realistic tones at high volume levels. 
     It is a feature of the present invention to utilize a back pressure chamber inside the call. 
     It is an advantage of the present invention to provide a call which is easy to use. 
     It is another feature of the present invention to have the back pressure chamber have an interior diameter dimension which is larger than the interior diameter dimension of the tube portion of the call between the reed and the back pressure chamber. 
     It is another advantage of the present invention to produce more realistic sounding owl hoots. 
     The present invention is an owl hooter game call which is designed to satisfy the aforementioned needs, provide the previously stated objects, include the above-listed features and achieve the already articulated advantages. The present invention is carried out in an “expertise-less” manner in a sense that the high level of expertise which was often required by an operator of an owl hooter call has been greatly reduced. 
     Accordingly, the present invention is an owl hooter game call having a back pressure chamber therein with a centrally disposed air passage therethrough. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The invention may be more fully understood by reading the foregoing description of the preferred embodiments of the invention, in conjunction with the appended drawings wherein: 
     FIG. 1 is a simplified cutaway exploded perspective diagram of a game call of the present invention, wherein the dotted lines show the alignment of the exploded parts. 
     FIG. 2 is a cross-sectional view of the back pressure chamber cap taken on line  2 — 2  of FIG.  1 . 
     FIG. 3 is a cutaway view of the present invention. 
    
    
     DETAILED DESCRIPTION 
     Now referring to the drawings wherein like numerals refer to like matter throughout, and more specifically to FIG. 1, which is a cutaway exploded view, there is shown an owl hooter game call of the present invention, generally designated  100 . Call  100  has a mouth end  102 , for engaging with the mouth of a human call operator and further has an opposing sound exit end  104 , where the sound generated within the call is emitted. Call  100  has a reed cover tube  110 , which is shown in a cutaway view revealing the reed assembly  150  disposed therein. Reed cover tube  110  has a reed cover tube mouth end  112  and a reed cover tube exit end  114 . Call  100  also has an initial sound chamber body  120 , having an initial sound chamber mouth end  122  and an initial sound chamber exit end  124 . Initial sound chamber body  120  also has an initial sound chamber thick walled portion  126  and an initial sound chamber thin walled portion  128  with an initial sound chamber boundary edge  127  disposed therebetween. Initial sound chamber exit end  124  has an initial sound chamber sound exit hole  129  therein for passage of air therethrough. Call  100  further having a back pressure chamber cap  130  with a back pressure chamber cap mouth end  132  and a back pressure chamber cap sound exit end  134 . Back pressure chamber cap  130  has a back pressure chamber cap outside surface  136  and a back pressure chamber cap sound exit hole  139  disposed therethrough at said back pressure chamber cap sound exit end  134 . Back pressure chamber cap inside surface  137  is visible through back pressure chamber cap sound exit hole  139 . 
     Also shown in the cutaway portion of reed cover tube  110  is reed assembly  150  which contains reed assembly body  152 , reed assembly grooved tongue  154 , and reed  156 . All components of the call  100 , except the reed  156 , are preferably made of the same material, which can be any suitable material, including but not limited to birds eye maple and plastic materials. 
     Now referring to FIG. 2, there is shown a cross-sectional view of the back pressure chamber cap  130  taken on line  2 — 2  of FIG.  1 . Back pressure chamber cap  130  is shown having a back pressure chamber cap outside surface  136  and a back pressure chamber cap inside surface  137  with a back pressure chamber cap sound exit end  134  having a back pressure chamber cap sound exit hole  139  therein. 
     Now referring to FIG. 3, as well as FIGS. 1 and 2, when call  100  is fully assembled, initial sound chamber thin walled portion  128  is in contact with back pressure chamber cap inside surface  137 . Additionally, back pressure chamber cap mouth end  132  is in contact with initial sound chamber boundary edge  127 . The distance between back pressure chamber cap mouth end  132  and back pressure chamber cap sound exit end  134  is greater than the distance from initial sound chamber boundary edge  127  to initial sound chamber exit end  124 , thereby creating a back pressure sound chamber  140  within back pressure chamber cap  130 . Due to the thickness of the walls of initial sound chamber thin walled portion  128  and the fact that back pressure chamber cap outside surface  136  surrounds initial sound chamber thin walled portion  128 , the diameter of back pressure sound chamber  140  is larger than initial sound chamber  142 , which is formed inside initial sound chamber body  120  and between initial sound chamber mouth end  122  and initial sound chamber exit end  124 . 
     In operation, the apparatus of the present invention could function as follows: air is blown into the call  100  at mouth end  102 , the air passes between reed  156  and reed assembly grooved tongue  154 , causing a vibration at a predetermined frequency, the air passes through reed assembly body  152  and enters the initial sound chamber  142  in initial sound chamber body  120 , passes through initial sound chamber sound exit hole  129  in initial sound chamber exit end  124  and then enters back pressure sound chamber  140  formed by the combination of initial sound chamber body  120  and back pressure chamber cap  130 . The dimensions of back pressure sound chamber  140  and initial sound chamber  142  help determine the sound of the call  100 . The precise dimensions throughout the call are a function of many variables which depend on the particular properties that may be desired in a call. 
     It is thought that the apparatus of the present invention will be understood from the foregoing description and that it will be apparent that various changes may be made in the form, construct steps and arrangement of the parts and steps thereof without departing from the spirit and scope of the invention or sacrificing all of their material advantages. The form herein described is merely a preferred exemplary embodiment thereof.