Archery sight and related method

Abstract

One embodiment of an improved elevation adjustable sight for archery bows includes an adjustable transmission mechanism to control the movement of a target distance indication frame relative to the movement of a sight frame. This mechanism eliminates the need for interchangeable sight tapes and allows the sight to be calibrated to any arrow trajectory within a predetermined range. The calibration process involves zeroing the sight at a short distance and profiling it at a longer distance, both through simple adjustments. The invention offers several advantages over traditional sight tapes and provides a user-friendly and versatile sighting system for archers.

I claim: 
     
         1 . An archery sight for attachment to an archery bow, comprising:
 a sight frame movable for changing the elevation of said sight frame relative to said archery bow;   a sighting element mounted to said sight frame;   a target distance indication frame;   a target distance indication element mounted to said target distance indication frame;   said sight frame operably connected to an adjustable transmission element;   said target distance indication frame operably connected to said adjustable transmission element;   whereby the displacement of said target distance indication frame relative to the displacement of said sight frame is controlled by said adjustable transmission element.   
     
     
         2 . The archery sight of  claim 1  wherein said sighting element is a sight pin. 
     
     
         3 . The archery sight of  claim 1  wherein said target distance indication element is a target distance indication pointer. 
     
     
         4 . The archery sight of  claim 1  wherein said target distance indication element is a target distance indication scale having a plurality of marks to correspond to a plurality of target distances. 
     
     
         5 . The archery sight of  claim 1  further including a ratio adjuster operably connected to said adjustable transmission element to adjust the ratio of transmission of said adjustable transmission element. 
     
     
         6 . The archery sight of  claim 5  wherein the orientation of said ratio adjuster is operable to pivotally adjust. 
     
     
         7 . The archery sight of  claim 5  further including a vernier scale mounted to said ratio adjuster. 
     
     
         8 . The archery sight of  claim 5  wherein the guiding surface of said ratio adjuster is substantially linear. 
     
     
         9 . The archery sight of  claim 5  wherein the guiding surface of said ratio adjuster is substantially curvilinear. 
     
     
         10 . The archery sight of  claim 1  wherein the sighting element is a scope. 
     
     
         11 . An archery sight for attachment to an archery bow, comprising:
 a first means for adjusting sight elevation operably connected to a sight frame for manually changing the elevation of said sight frame relative to said archery bow;   a sighting element mounted to said sight frame;   a target distance indication frame;   said sight frame and said target distance indication frame being operably connected to a second means for adjustably controlling the displacement of said target distance indication frame in response to the displacement of said sight frame;   whereby the displacement of said target distance indication frame in response to the displacement of said sight frame is adjustable.   
     
     
         12 . The archery sight of  claim 11  wherein said sighting element is a sight pin. 
     
     
         13 . The archery sight of  claim 11  wherein said target distance indication frame includes a target distance indication pointer. 
     
     
         14 . The archery sight of  claim 11  wherein said target distance indication frame includes a target distance indication scale having a plurality of marks to correspond to a plurality of target distances. 
     
     
         15 . The archery sight of  claim 13  wherein said target distance indication pointer is joined by a magnification lens. 
     
     
         16 . The archery sight of  claim 11  wherein said sighting element is a scope. 
     
     
         17 . A method for calibrating an elevation adjustable sight on an archery bow, comprising the steps of:
 placing a zero-range target at a zero-range target distance;   adjusting the elevation of a sight frame for said zero-range target distance;   shooting an arrow at said zero-range target;   adjusting a zero setting of said elevation adjustable sight;   placing an extended-range target at an extended-range target distance;   adjusting the elevation of said sight frame for said extended-range target distance;   shooting said arrow at said extended-range target;   adjusting a profile setting of said elevation adjustable sight.   
     
     
         18 . The method of  claim 17  further including recording said zero setting and said profile setting for future use with a substantially similar arrow trajectory. 
     
     
         19 . The method of  claim 17  wherein said sight frame includes a scope assembly mounted to said sight frame. 
     
     
         20 . The method of  claim 17  further including moving a target distance indication frame on said elevation adjustable sight.