Electronic javelin observer

Abstract

Various aspects of this disclosure relate to an archery sight mounted or potentially mounted on an archery bow. The sight incorporates a front sight and adjustment components combined with an electronic module to indicate or control the desired position of the front sight. The electronic module calculates and displays the relevant target distance based on the position of the front sight.

Description

[0001] This application claims the benefit of provisional application serial number 62 / 705,108, filed on June 11, 2020, which is incorporated herein by reference. Technical Field

[0002] Various aspects of the present invention relate to archery bows, and particularly to accessories such as sights that can be used with archery bows. Background Technology

[0003] A bow sight is used to assist an archer in aiming the bow. A typical bow sight includes a sight housing fixed to the bow frame by one or more supports. The sight housing typically defines a viewing opening (i.e., a viewing window) through which the archer aims at a target. Bow sights typically also include at least one viewing element, such as a pin (front sight), extending into the viewing opening. The viewing element defines and supports a point of view. The point of view is the point on which the archer aligns with the target when aiming. In use, the archer pulls the bowstring and adjusts the bow's position so that the expected target is visible through the viewing opening. While continuing to gaze through the viewing opening with the bowstring drawn, the archer adjusts the bow's position so that the point of view is aligned with the expected target in the archer's eye. Once the point of view is aligned with the expected target, the archer releases the bowstring and fires an arrow. "Target" as used herein can refer to a target in pursuit or a stationary target. An example of a vertically adjustable sight is illustrated in U.S. Patent No. 7,275,328.

[0004] The vertical positions of multiple viewpoints, or multiple positions of a single adjustable viewpoint, are preferably set and calibrated for the user and the bow, such that each viewpoint position corresponds to a different target distance. Multiple observation components are typically arranged in a vertically aligned orientation (such as that described in U.S. Patent No. 6,418,633) or a horizontal orientation (such as that described in U.S. Patent No. 5,103,568). In some embodiments, the viewpoint can be vertically adjusted to calibrate it for different target distances. Lower viewpoint positions typically correspond to longer target distances.

[0005] Adjusting multiple sight pins or multiple positions of a single adjustable sight point for different target distances typically involves the archer repeatedly "aiming" the bow at each distance to accurately correlate each sight point position with a specific target distance. The target distances corresponding to different sight heights or positions are proportional, not linear. In other words, there is no one-to-one correspondence between different sight points and their corresponding target distances. An alternative approach is to use computer software based on bow speed and other variables to prepare and print sight tapes, which are then mounted on the bow sight and provide guidance for adjusting the sights individually for different target distances. Yet another alternative (as described in U.S. Patent No. 7,392,590) uses a multi-pitch screw to adjust multiple sights simultaneously and proportionally.

[0006] U.S. Patent No. 9,513,085 discloses an observer incorporating an internal adjustable body with a proportionally curved helical track. Rotating the body proportionally adjusts the spacing between different target distance indicators. Once calibrated, the body is preferably locked in place. Individual knobs are used to adjust the height of a single viewpoint and the corresponding pointer to align the viewpoint with different target distance indicators, correspondingly adjusting the viewpoint to different target distances (10 yards, 20 yards, 30 yards, etc.). Summary of the Invention

[0007] Embodiments of this disclosure include a sight for an archery bow. The sight includes at least one front sight defining a viewpoint within a sight cover. Once properly calibrated, a control knob or dial can be rotated to adjust the front sight and viewpoint to different heights. The sight electronically measures the height adjustment and digitally displays the calculated target distance based on a proportional distance between a known height and the adjusted height.

[0008] The sight height can be adjusted using control knobs and an axis to move the height of the viewfinder cap. Starting from the highest position at the initial target distance (e.g., 20 yards), the electronic module measures the rotation angle of the axis, which corresponds to the height adjustment distance of the sight. Based on the amount of axis rotation, the electronic module calculates and displays the target distance at the corresponding sight height (e.g., 21 yards, 22 yards, ... 25 yards, ... 30 yards, etc.).

[0009] One method for measuring rotation is based on a magnet mounted on the inner end of an adjustment knob shaft. At least one sensor within the electronic module measures the rotation of the magnet, thereby determining the corresponding needle height and allowing the electronic module to calculate and display the corresponding target distance.

[0010] This disclosure includes two methods for calibrating the observer. In the "dual-distance" method, the observer is first calibrated using a test lens so that it is aligned with a first fixed distance. The needle is then adjusted so that it is calibrated and aligned with a second fixed distance. Both distances are known. Once the proportional needle height spacing between the two known distances is known, the electronic module can calculate and indicate the distances to other targets based on the current position of the crosshair relative to one of the known distance points (typically the first fixed distance point).

[0011] In the second "bow speed" method, the observer is first calibrated to aim at a first fixed distance. Then, if the bow speed (i.e., the arrow's launch velocity) is known, it is programmed into the electronic module's memory. Subsequently, as the sight height changes, the electronic module can calculate and display the corresponding target distance. If only a rough bow speed is known, the archer can iteratively input different bow speeds into memory and then test the results to achieve correct target indication.

[0012] Other objectives and accompanying advantages will be better understood when considered in conjunction with the accompanying drawings, and will thus be readily apparent from the following detailed description. Attached Figure Description

[0013] Figure 1 This is a representative embodiment of an archery bow with an archery observer according to the embodiments of this disclosure.

[0014] Figure 2 This is a perspective view of an archery observation device according to an embodiment of the present disclosure.

[0015] Figure 3 yes Figure 2 Rear view of the archery observer.

[0016] Figure 4 yes Figure 2 A top view of an archery observer.

[0017] Figure 5 yes Figure 2 A 3D view of an archery sight, with the electronic modules removed.

[0018] Figure 6A yes Figure 2 A partial exploded view of the electronic module and the observer housing.

[0019] Figure 6B yes Figure 6A Alternative exploded three-dimensional view of the electronic module and the observer housing.

[0020] Figure 6C This is a perspective rear view of an electronic module according to an embodiment of the present disclosure.

[0021] Figure 7 This is a perspective view of an archery observation device according to an embodiment of the present disclosure.

[0022] Figure 8 yes Figure 7 The side view of the archery observer shown.

[0023] Figure 9 yes Figure 7 A perspective view of an archery observer, with the casing removed to illustrate the internal view.

[0024] Figure 10 This is a perspective view of an archery observation device according to an embodiment of the present disclosure. Detailed Implementation

[0025] To facilitate understanding of the principles of this disclosure, exemplary embodiments will now be referenced and described using specific language. However, it should be understood that this is not intended to limit the scope of the disclosure, and such changes, modifications, and further applications of the principles are contemplated by those skilled in the art to which this disclosure pertains.

[0026] Embodiments of this disclosure include a sight for an archery bow. The sight has at least one front sight defining a viewpoint. Once properly calibrated, a knob or dial can be rotated to adjust the front sight to different heights. The sight electronically measures the adjustment amount, then calculates and displays the target distance relative to the adjusted front sight height.

[0027] Figure 1 A representative embodiment of an archery bow 10 incorporating an archery observer 110 according to the present disclosure is illustrated. The bow 10 includes an upright member 11 with a handle, an upper limb or upper paired limb 12, and a lower limb or lower paired limb 14. In the illustrated embodiment, the upper and lower limbs are formed by parallel and symmetrical limbs, sometimes referred to as a quadrupedal arrangement. Alternatively, the single-piece limb may have removed notch or slotted areas to allow for the mounting of rotating elements to the limb tips. In the illustrated single-cam embodiment, rotating members (such as idler wheel 16 and eccentric cam 18) are supported at the limb tip portions for rotational movement about axes 20 and 22. Upper pulley shaft 20 is carried between the outer limb tip portions of the upper limb 12. Lower pulley shaft 22 is carried between the outer limb tip portions of the lower limb 14.

[0028] The rope portion defining the bowstring 50 includes an upper portion 52 and a lower portion 62, which are fed from the idler pulley 16 and cam 18 when the bow is drawn. The upper portion 52 may be part of a longer rope having a middle section mounted around the idler pulley 16, with its ends mounted to the cam 18. The non-bowstring portion of the rope extending from the pulley 16 to the cam 18 may be referred to as the return rope portion. Furthermore, the Y-shaped yoke anchoring rope has a lower end mounted to the cam 18, extending to two upper ends mounted near the opposite end of the shaft 20. Each rope has a certain thickness and a circular cross-section defining a circumference. From the archer's perspective, the bowstring is considered rearward relative to the forward-facing upright member.

[0029] When the bowstring 50 is drawn, it causes the idler wheels 16 and cams 18 at each end of the bow to rotate, extending the string and bending the limbs 12 and 14 inward, thereby storing energy therein. When the bowstring 50 is released along with the arrow that engages it, the limbs 12 and 14 return to their rest positions, causing the idler wheels 16 and cams 18 to rotate in opposite directions, lifting the bowstring 50 and launching the arrow with energy proportional to the energy initially stored in the limbs. The bow 10 is described for illustration and context and is not intended to be limiting.

[0030] Although not illustrated, embodiments of this disclosure can also be used with other types of bows, such as double-cam or two-cam bows, hybrid cam bows, or recurve bows, which are considered conventional bows for the purposes of this disclosure. For convenience, the combination of the upright 11 with the single or quadrupedal limbs forming the upper limb 12 and lower limb 14 is generally referred to as the bow body 15. Therefore, it should be understood that the bow body can be designed in various ways depending on the many different types of bows that can be used with this disclosure.

[0031] Various accessories, such as arrowstocks, stabilizers, and quivers, can be mounted to the bow body 15. Typically, the sight 110 is used in conjunction with a peep sight. The sight 110 is typically mounted to or formed as part of the upright 11 above the arrow in its stationary position. The sight 110 defines at least one aiming point.

[0032] The sight adjustment mechanism according to the preferred embodiment described herein assists the archer in calibrating a single adjustable aiming point (such as the front sight) to different reference or target distances. The spacing between the corresponding needle positions for different yards follows a proportional spacing pattern controlled by a range formula. Using laws of physics and geometry, the range formula can be used to calculate the distance the arrow travels from the bow, where the horizontal distance traveled is proportional to the bow speed and the angle of launch. More specifically, the formula is:

[0033] x=(v 2 sin 2θ) / g 2

[0034] Where "x" is the horizontal distance traveled, "v" is the initial velocity of the arrow from the bow or the bow velocity, "θ" is the launch angle, and "g" is the acceleration due to gravity. Assuming the bow has a consistent launch velocity, the corresponding launch angle θ for a given distance can be calculated using the bow velocity. For example:

[0035] 10yds=(v 2 sin 2θ1) / g 2

[0036] 20yds=(v 2 sin 2θ2) / g 2

[0037] 30yds=(v 2 sin 2θ3) / g 2

[0038] For the purposes of this organization, the reference line or zero-degree line used to calculate the arrow's launch angle can be defined as a horizontal line extending from a point immediately adjacent to the archer's eye, through the observer, intersecting the front sight, and then extending to the target point at a first defined distance. The distance from the archer's eye to the front sight is proportional to the bow's draw length and is assumed to be constant for a given archer and bow. For example, when the first front sight on a 27” draw length bow is calibrated at 10 yards, the zero-degree line θ1 can be defined as a line including approximately 27” plus 10 yards from the archer's eye to the first front sight position to the target. Using the above formula and knowing the bow's velocity, angles θ2, θ3, θ4, ... can also be calculated relative to the reference line and the additional target distances (such as 20 yards, 30 yards, 40 yards, etc.) from the archer's eye. These angles θ2, θ3, θ4, ... can then be applied using the distance from the archer's eye to the observer to define the offset height of the front sight relative to the first front sight position corresponding to the respective target distance. The offset height for longer distances is typically measured downwards relative to the needle position calibrated for shorter distances.

[0039] For example, in the "dual-distance" calibration method, the observer is first calibrated using a test lens to align with a first fixed distance. The needle is then adjusted and calibrated again using the test lens for a second fixed distance. Both distances are known. Once the proportional needle height spacing between the two known distances is known, the electronic module can calculate and indicate other target distances based on the position of the crosshair relative to the proportional spacing determined during calibration.

[0040] In the second "bow speed" method, the sight is first calibrated to align with a first fixed distance. Then, if the bow speed (i.e., the arrow's firing velocity) is known, the archer inputs it into the electronic module's memory. The electronic module can then calculate the corresponding target distance based on the proportional distance between the first fixed distance and the sight at the current position. If only a rough bow speed is known, the archer can repeatedly input different bow speeds and test the results until the electronic module displays an accurate target indication.

[0041] Once the observer is calibrated, the electronic module senses and measures the height adjustment when the crosshair is adjusted. The electronic module then calculates and accurately displays the target distance proportional to the current crosshair height (e.g., 21 yards, 22 yards, ... 25 yards, ... 30 yards, etc.). In some implementations, the electronic module can accurately indicate target distances over a continuous range based on approximately the entire height range within which the crosshair can be adjusted.

[0042] Figure 2-5 A view illustrating a representative embodiment of an electronic archery observer 110 is shown. The archery observer 110 includes a base 112 configured to be mounted to an archery bow stand 11, for example, using fasteners such as screws or bolts. Alternatively, the base 112 may be an integrated portion of the archery bow stand. The front end of the base 112 is mounted to or integrally connected to an observer housing 114. A support arrangement 116 is adjustably coupled to the front end of the housing 114. The support arrangement 116 includes a laterally extending windage arm 118. An observer cover 120 is mounted to the lateral end of the windage arm 118. The observer cover 120 defines a viewing window or observation window. At least one front sight 122 is mounted within the observer cover 120. The front sight 122 extends from the base to a viewpoint 124 in the central region of the observer cover 120. As an example, viewpoint 124 can be an endpoint, the end of an optical fiber, or a hole.

[0043] In the illustrated embodiment, the support arrangement 116 includes a vertical slider 130 mounted within a vertical track at the front end of the observer housing 114. The vertical slider 130 can be adjusted relative to the observer housing 114 along a vertical axis to correspondingly adjust the height of the support arrangement 116. A control knob 160 can be rotated to controllably adjust the height of the slider 130. In some embodiments, a knurled knob is located inside the observer housing 114 and mounted to a horizontal axis 162 controlled by the knob 160. The circumference of the knurled knob tangentially engages the surface of the slider 130, such that rotation of the knurled knob causes a corresponding change in the vertical height of the slider 130. Changing the height of the slider 130 correspondingly changes the height of the support arrangement 116, and consequently changes the height of the sight 122. In an alternative embodiment, the slider 130 incorporates a rack and pinion mechanism that engages with a pinion on a shaft 162 within the observer housing 114.

[0044] The bracket arrangement 116 incorporates a micro-height adjustment mechanism controlled by knob 134 for initial calibration of the height of the viewpoint 124. The bracket arrangement 116 also includes a wind deflection correction adjustment mechanism controlled by knob 136 and lock 138. Knob 136 can be used to adjust the lateral extension distance of the wind deflection correction arm 118 and correspondingly the viewpoint 124 relative to the observer housing 114. Once adjusted, lock 138 secures the wind deflection correction arm 118 in place.

[0045] Figure 7-9 A view illustrating an alternative embodiment of the electronic archery observer 210 is shown. Except for the arrangement of the vertical slider and control knobs, the archery observer 210 is constructed in the same manner as the archery observer 110. The archery observer 210 includes a base 112 configured to be mounted to the bow stand 11. The front end of the base 112 is mounted to or integrally connected to the observer housing 214. A support arrangement 216 is adjustably coupled to the front end of the housing 214. The support arrangement 2015 includes a windage correction arm extending laterally from the support arrangement to the observer cover 120. The observer cover 120 defines a viewing window or observation window. At least one sight 122 is mounted within the observer cover 120.

[0046] In the illustrated embodiment, the support arrangement 216 includes a vertical slider 230 mounted within a vertical track at the front end of the observer housing 214. The vertical slider 230 is adjustable relative to the observer housing 214 along a vertical axis to correspondingly adjust the height of the observer cover, front sight, and viewpoint. A control knob 260 can be rotated to controllably adjust the slider 230. The control knob 260 has a larger diameter than the control knob 160, thereby enabling more precise control.

[0047] Figure 9An example is shown with the housing 214 omitted to illustrate an internal view. For example... Figure 9 As can be seen, the pinion 232 is located inside the observer housing 114 and mounted to a horizontal axis 262 controlled by a control knob 260. The pinion 232 engages tangentially with a vertical rack and pinion 234 on a slider 230, such that rotation of the pinion causes a corresponding change in vertical height in the rack and pinion 234 and the slider 230. In the illustrated embodiment, the pinion 232 is helical and the rack and pinion 234 has a slanted groove in which the pinion and the rack and pinion engage and mesh with each other.

[0048] Optionally, but preferably, a pair of retaining screws 236 are mounted in the observer housing 214. The retaining screws 236 are positioned such that their inner ends abut or are close to the shaft 262. The retaining screws 236 support the shaft 262 against rearward springback or bending motion and help maintain the engagement of the rack and pinion, for example, when releasing an arrow.

[0049] Figure 10 Another alternative embodiment of the electronic archery observer 310 is illustrated. The archery observer 310 is constructed in the same manner as the archery observer 110, except that the archery observer 310 includes multiple sights and viewpoints within the observer cover 320. The observer 310 is illustrated as having a first sight 322 with a first viewpoint 324, a second sight 332 with a second viewpoint 334, and a third sight 342 with a third viewpoint 344.

[0050] In the archery sight 310, the first sight 322 is used in conjunction with the electronic module 140. When the sight cover 320 is at a specific height (usually the highest height), the second sight 332 and the third sight 342 are manually calibrated for fixed distances, such as 10 yards and 20 yards or 20 yards and 30 yards.

[0051] On the three-needle sight 310, the first or bottom needle 322 is used in conjunction with the electronic module. With the observer cap in the designated position, the top two needles (i.e., the second needle 332 and the third needle 342) observe two fixed distances (such as 20 yards and 30 yards or 10 yards and 20 yards) different from the first or bottom needle 322. The bottom needle 322 observes a third distance (such as 40 yards). Subsequently, as the height of the observer cap 320 is adjusted, the electronic module displays the target distance relative to the adjusted height of the bottom sight 322. When the observer cap is removed from the designated position, the second needle 322 and the third needle 342 no longer observe a specific distance.

[0052] Observers 110, 210 and 310 include an electronic module 140 mounted to the observer housing. Figure 6A-C illustrates a detailed view of the electronic module 140. The electronic module 140 includes a front housing 142 and a rear housing 150. A display 144 is located in the front housing 142 and oriented such that the displayed information is visible to the archer. The display 144 may be an LED or LCD screen that displays text or icons to the archer, such as displaying the target distance in yards or meters, bow speed, remaining battery power, etc.

[0053] Electronic module 140 includes one or more control buttons 146 for controlling the electronic module with various functions, such as turning the power on / off, selecting between modes to adjust and set values, and otherwise programming the module. Optionally, electronic module 140 includes a control port 148, such as a USB or microUSB port, to which a charger and / or programming cable can be connected. Further optionally, observer 110 may include a removable cover to protect control port 148 from debris, moisture, and / or impact when not in use. Rear housing 150 defines a shaft cavity 154.

[0054] The electronic module 140 is installed into the observer housing 114 by placing it in place and securing it in the appropriate position. Figure 6A and 6B As shown, in the illustrated embodiment, the outer contour of the rear housing 150 is accommodated in a mounting cavity 156 defined in the side of the observer housing 114.

[0055] The electronic module 140 is designed to sense the rotation of the control shaft 162 and measure its angular rotation when the control knob 160 is selectively rotated. For example, as Figure 5 and 6A As shown, the control shaft 162 extends horizontally through the observer housing 114, which has suitable holes and / or bushings, and into the mounting cavity 156. During assembly, the end of the control shaft 162 extends into the shaft cavity 154 of the electronic module.

[0056] The shaft cavity 154 is arranged to be coupled to the end of the control shaft 162. The coupling can be mechanical, electronic, or magnetic. In the illustrated embodiment, magnetic coupling is used. A magnet 168 is fixedly mounted to a cup at the end of the control shaft 162 such that the magnet 168 is received within the shaft cavity 154. In this embodiment, the electronic module 140 incorporates at least one magnetic sensor adjacent to the shaft cavity 154 to measure the angular rotation of the magnet 168 and the control shaft 162. In alternative embodiments, a rotary encoder or rack and pinion may be used as the mechanical coupling element. In further alternative embodiments, an electronic coupling element, such as a potentiometer based on a variable resistor, may be used.

[0057] The electronic module 140 internally includes a processor, a programmable memory, a power supply, buttons, circuitry, and related components. Once the angular rotation of the control axis 162 is measured, the processor and programmable memory use the measured rotation to calculate the current height of the viewpoint 124. The calculation can be based on range formulas, programming algorithms, or empirical data. The electronic module 140 then uses the proportional distance between the viewpoint 124 and the calibration position to calculate and display on the display 144 the target viewing distance 110 corresponding to the adjusted height of the viewpoint 124.

[0058] In some embodiments, the electronic module is capable of accurately calculating and displaying different target distances scaled in yards or meters, in increments of one unit (e.g., 20 yards, 21 yards, 22 yards, etc.). In some preferred embodiments, the electronic module is capable of accurately calculating and displaying different target distances scaled in yards or meters, in increments of less than one unit (e.g., 20.1 yards, 20.2 yards, 20.3 yards, etc.). In alternative embodiments, the electronic module may be less precise, for example, displaying target distances scaled in increments of 2 yards, 5 yards, or 10 yards.

[0059] Although this disclosure has been illustrated and described in detail in the accompanying drawings and the foregoing description, it is to be understood that only preferred embodiments have been shown and described, and that protection is intended for all variations and modifications falling within the spirit of this disclosure.

Claims

1. An observation device for an archery bow, characterized in that, The observer includes: a. A base configured to be mounted to an archery bow; b. A housing connected to the base; c. An observer cover defining an observation window, the observation window being mounted to the housing using a bracket arrangement structure, wherein the observer cover is vertically adjustable relative to the housing; d. Viewpoint, which is mounted within the observation window; e. Wherein, the first known height of the viewpoint relative to the housing is calibrated to a first known target distance; f. Wherein, the second known height of the viewpoint relative to the housing is calibrated to a second known target distance; g. A control knob having a control shaft extending horizontally through the housing, the control shaft being rotatably coupled to the housing and operably coupled to the support arrangement, wherein rotation of the control knob and the control shaft vertically adjusts the height of the observer cover and the viewpoint relative to the housing; and h. An electronic module, which is mounted to the housing and has a display and at least one sensor to measure the angular rotation of the control shaft; i. The electronic module includes a processor and a programmable memory, wherein the processor and the programmable memory use a measured angular rotation of the control axis to calculate an adjusted viewpoint height relative to the first known height and the second known height, and wherein the electronic module then displays a calculated target distance corresponding to the adjusted viewpoint height; j. The electronic module includes a front housing and a rear housing, wherein the display, the processor, the memory, the circuitry, and the power supply are housed in the front housing and the rear housing, and wherein the rear housing defines a shaft cavity into which one end of the control shaft extends.

2. The sight for an archery bow as claimed in claim 1, wherein, The electronic module is magnetically coupled to the end of the control shaft.

3. The sight for an archery bow as claimed in claim 1, the sight comprising a magnet mounted to an end of the control shaft, and wherein, The electronic module includes at least one magnetic sensor to measure the angular rotation of the magnet.

4. The sight for an archery bow as claimed in claim 1, wherein, The control knob is located on the control shaft on the side of the housing opposite the observer cover.

5. An observation device for an archery bow, characterized in that, The observer includes: a. A base, said base being mounted to the archery bow; b. A housing connected to the base; c. An observer cover defining an observation window, the observation window being mounted to the housing using a bracket arrangement structure, wherein the observer cover is vertically adjustable relative to the housing; d. Viewpoint, which is mounted within the observation window; e. Wherein, the known height of the viewpoint relative to the housing is calibrated to a known target distance; f. A control knob having a control shaft extending horizontally through the housing, the control shaft being rotatably coupled to the housing and operably coupled to the observer cover, wherein rotation of the control knob and the control shaft vertically adjusts the height of the observer cover and the viewpoint relative to the housing; and g. An electronic module, the electronic module being mounted to the housing, the electronic module having a display and at least one sensor for measuring the angular rotation of the control shaft; h. The electronic module includes a processor and a programmable memory, wherein the arrow speed is stored in the memory, and wherein the processor and the programmable memory use the measured angular rotation of the control axis to calculate the adjusted viewpoint height relative to the known height, and use the stored arrow speed to calculate and display the target distance corresponding to the adjusted viewpoint height; i. The electronic module includes a front housing and a rear housing, wherein the display, the processor, the memory, the circuitry, and the power supply are housed in the front housing and the rear housing, and wherein the rear housing defines a shaft cavity into which one end of the control shaft extends.

6. The sight for an archery bow as described in claim 5, wherein, The electronic module is magnetically coupled to the end of the control shaft.

7. The sight for an archery bow as claimed in claim 6, the sight comprising a magnet mounted to the end of the control shaft, and wherein, The electronic module includes at least one sensor to measure the angular rotation of the magnet.

8. The sight for an archery bow as described in claim 7, wherein, The magnet extends into the shaft cavity.

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