Patent application title: Electric variable magnification rifle gun telescope drive, and accessory power driver/power supply/pressure-velocity meter/audible level
John David Panos (Chestertown, NY, US)
IPC8 Class: AF41G138FI
Class name: Sight devices focused beam (e.g., laser on target, etc.) having beam adjusting structure or mounted for correction
Publication date: 2012-10-11
Patent application number: 20120255213
This device uses an electric motor to move the magnification change
mechanism of a variable magnification telescope that is intended to be
used on a gun, or, uses the motor to move an other mechanical accessory,
or, can move multiple accessories in unison mechanically with or without
the motor, and/or also serves as an electric power supply. This device is
universally adaptable, and an example of an accessory could be a
flashlight with an adjustable beam, and this could be mounted on the
telescope, or on the gun itself. This device also has an electronic
control circuit to control the movement of the motor, and can coordinate
movement between multiple drive units of various accessories. This device
can also be detached from the gun and used hand held.
1. This patent is to stand as evidence that I have invented an
electro-mechanical device. This serves to protect my exclusive right to
make and sell any gun telescope or device that attaches to a gun or gun
scope that uses an electric motor to move a magnification change
mechanism, or a motor to move other mechanical accessories, or a motor to
move both the magnification and accessories, and, also serve as an
electric power supply. In the event that a patent already exists by
someone else in the U.S. Patent office for an electric power zoom gun
scope that I was unable to discover, than this patent is intended for
every other feature described herein, in combination with power zoom, or
alone. To make clear the above statement, I will pose examples as follow
If a patent does not already exist for an electric power zoom gun scope,
than I should have the right to make and sell any thing that uses an
electric motor to move the magnification change mechanism of a gun scope.
This means not only the design shown herein, but of any design or layout
of the physical location of the motor, power train, and other components
on the gun scope.
2. However, in addition to moving the magnification, my device uses a motor to move other accessories such as a target illuminator that has the ability to change the width of the beam of light that shines on the target. The ability of my device to change the width of this beam of light automatically and in unison with the magnification while the scope is zoomed in so as to closely match the width of the field of view as seen through the gun scope, is so new and unique and fundamentally different from any power zoom only scope that may have been patented previously, that I believe that this constitutes a new invention. And furthermore, in fact, I was in the process of beginning to construct my second power zoom scope when a new product first became available on the market from the B.S.A Co. called a LASER TARGET ILLUMINATOR. This device is similar in size and function to a mini flashlight whereas rotating a mechanism will change the width of the light beam, except that the beam has a sharp edge and shines out to a much greater distance. Not only do I believe that I may be the first person to have this light move in unison with power zoom, but also be the first to motorize a light on a gun by itself, without power zoom,
3. This small arms type invention is in part, an electrical power supply capable of powering a motor and accessories, and, will alone, power multiple accessories, without any motor, and do so with the use of remote switches. If a power supply by itself, for multiple accessories with remote switches has been previously patented, than that part, and only that part of this claim is void, and everything else still stands.
4. The accessories being powered by the same batteries as the motor may include, but are not limited to, an illuminated reticle, target illuminator, an electronic "bubble" level that is perpendicular to the barrel and has visual indicator lamps and audible tones to level the gun, a display to indicate the magnification level, an electronic circuit and sensors and display to indicate the pressure inside the chamber and the approximate velocity of the bullet, or a laser range finder. The above electrically powered accessories have never been combined with the power supply of a motorized gun scope before and therefore, when combined, I believe form a new invention.
5. To add to and make clear claim 4. I will pose the following example: The combination of a laser range finder on a rifle scope has probably already been patented. So assuming that it is, it is understood here that connecting that invention to my power supply does not give me the right to sell that combination as a product without that patent holders permission. Likewise, the intent here is to claim the right to use a universal adaptor to replace the typical battery of a device and power it from my battery. It may be necessary for my invention to use a powerful motor to be able to move the load with high performance, and therefore that motor requires a powerful battery for the battery to have long life. So while the battery is there on the scope, it may as well be used to power the other accessories, which frees up space on the scope, and allows those accessories to be controlled by remote switches. It is my opinion that the advantage of this method is not insignificant. The purpose of a massive power supply on a gun is to have an extra margin of capacity. This extra capacity serves two functions. First to power a motor, and second to power other accessories. If the accessories were removed, then a battery with the smallest possible capacity to run only the motor would be appropriate. Instead, this invention may have the largest possible battery capacity. If someone else were to be able or eligible to acquire a patent that would restrict the universal adaptability of this invention to power electrical accessories, then that would defeat the purpose of the massive battery.
6. Referring back to claim no. 4, I believe that the electronic "bubble" level, being a relatively new product, has probably never been used, not just with my invention, but on a gun by itself, and no patent already exists for the use of this device on a scope, or on a gun at all. If this is true, then I hereby claim the visual and/or audible tone electronic "bubble" level for use on a gun. This is to mean that I should have the right to sell the level designed for use integrally on a gun, with or without the rest of my invention.
7. Referring back to claim no. 4, the electronic circuit and sensors and display to indicate the chamber pressure and velocity of the bullet is not a product that is designed for, or is available to be mounted or attached permanently as part of a rifle gun, and to the best of my knowledge, no such patent exists for this device designed to be used integrally as part of the gun. If this is true, then I hereby claim the right to sell this product designed for use as an integral part of a small arms type gun, with or without the rest of my invention.
8. This invention uses electricity stored in batteries to energize a motor that drives a speed reducing transmission and final drive mechanism to actuate the variable magnification mechanism of a gun aiming telescope, and/or actuate other accessories of the gun scope that may include but are not limited to parallax adjustment, or accessories attached on the gun scope.
9. Accessories on the gun scope may include but are not limited to a laser target illuminator that has a mechanism to change the angle width of the beam of light projected on the target, or an adjustable iris to reduce the size of the opening of any lens including the objective lens, or the lens of the target illuminator.
10. The transmission may have multiple power take off points to attach final drive mechanisms to move multiple accessories in unison, and/or move accessories in unison with the variable magnification, or move the variable magnification only.
11. This invention has electrical switches to control the motor and other electrical accessories, these other accessories being powered by the same batteries as the motor.
12. The control switches may be mounted on the scope, or remotely elsewhere on the gun and the wires connected by a quick disconnect plug. The switches may also be wireless and transmit a radio frequency to a receiver/amplifier circuit.
13. This invention may have an electronic control circuit to control the motor. The features of this circuit may include, but are not limited to the ability to reduce the speed of the motor as the mechanism approaches the limit of its travel, to turn off the power to the motor automatically when the motor stalls against the limit of travel even though the control switch is still held on, and, to slow the acceleration of the motor so as to be able to "jog" or move the motor in small increments.
14. This invention may have electrical sensors to determine the position of the mechanism that may include but are not limited to variable resistor, magnetic proximity, I.R phototransistor, or "micro" switch.
15. A motor may be used to actuate accessories attached not just on the scope, but anywhere on the gun that a patent does not already exist for, and that I am eligible and entitled to have. This means that I intend to have a business where if its on a gun, and it moves, I intend to motorize it. Just like luxury automobiles have power mirrors and power seats and power windows, I intend to sell a rifle that has power everything, and I intend to invest the effort to bring a product to market that motorizes whatever it is that moves, without fear that someone else can then claim whatever that is in a patent, and then prevent me from having the exclusive right to sell that.
16. Two or more motor, transmission, electronic control circuits may be used on the same gun/gun scope to actuate different accessories.
17. When two or more motors are used on the same gun scope or anywhere else on the gun, there is an electronic control circuit to interface the position of the mechanisms, and/or to select between actuating each mechanism independently or in unison.
18. On this invention, multiple laser target illuminators, and/or, multiple conventional light target illuminators, and/or multiple laser dot projectors, or any combination thereof, may be used on the same gun, and/or, gun scope.
19. This invention may have a motor that has a margin of power greater than would be necessary if it was only moving the variable magnification and One accessory. Frankly, instead of a tiny little motor that goes "we-we-we", this invention may have a fat motor that goes "BOOYAH", and gears and bearings that have beef to back it up, and a transistorized control circuit to hold back the reigns. When it comes to driving any accessory that a reasonable person might want to put on a gun, this device has the power to do it, and do it fast. If someone else were able or eligible to acquire a patent that would restrict the universal adaptability of this invention to drive mechanical accessories, then that would defeat the purpose of the extra beef. I do not believe it is possible to come up with a fundamentally different device to motorize a small arms type gun accessory that this cant do. This should be the first and last, to end all, and hereby close the door on the full power rifle.
20. Referring now to the LASER TARGET ILLUMINATOR produced by the B.S.A. Co., and cited as one possible accessory that my invention is capable of motorizing, this product is described in this patent only to demonstrate the capability of my invention. Substituted in place of the B.S.A.Co. laser could be an ordinary light with a single lens and an adjustable iris to restrict the width of the beam. My invention does not depend on the B.S.A.Co. laser to function or to have the desired effect. The existence of any previous small arms type gun or gun scope related motorized device patent will only void any claim of this patent to that device, and does not void this entire patent. The previous existence of a patent for any part of this invention that I may not be entitled to, will void only my claim to that part. Anywhere the word "patent" appears herein, it is intended to mean United States patent only.
 This patent has priority based on provisional application No.
61/396,194 titled "Electric variable magnification rifle scope 5000"
filed on May 24, 2010, and provisional application No. 61/396,639 titled
"Electric rifle scope power driver 6000, 7000, 9000, 10000" filed on Jun.
 The ways the final drive may transmit power include, but are not limited to, spur gears, cog tooth belt, chain, worm gear, threads on the shaft to move a nut axially or along the shaft, or, an eccentric or cam lobe.
 The types of speed reducing transmission may include, but are not limited to, multiple stage planetary gear, worm gear, or compound cluster gear.
 The final drive mechanism is adjustable to "time" or synchronize the position of the accessories, in relation to each other, or, in relation to the magnification level of the scope.
 This invention is adjustable for the point along the travel where the motor begins to decelerate. This adjustment may be made either electrically, as in a trim pot on the motor control module, or mechanically, as in shifting the relationship between the mechanism and the sensors.
 The electronic control circuit is able to automatically position the mechanism to a pre-determined point along the travel.
 The final drive mechanism may be moved by hand without the energy of the motor.
 An electric motor may be used to operate a gyroscopic device so as to stabilize the roll, pitch and yaw of a gun to improve accuracy. This device may also have an electronic control circuit and sensors.
 The laser target illuminator or other conventional light that works with the invention described herein, may be mounted on the gun scope, or on the gun itself.
 When the switches are mounted on the scope, they may be double throw miniature toggle switches mounted in a formed sheet metal bracket and attached by screws to the underside of the scope eye bell or what is otherwise referred to as the ocular housing.
 On this invention, the button cell battery and switch knob typically used to power the lamp of an illuminated reticle are eliminated. the button cell and knob are replaced by a flange, through which pass wires to power the lamp. the wires are encased by heat shrink tube from where they pass through the flange and continues up from the flange by more than an inch to stiffen the wire, and, the wires are bent over and held tight to the flange by a hold down strap clamp, and the clamp is secured by two of the same screws that hold the flange to the scope body. The flange also has a tab that is bent up at an angle to position the wires away from the final drive mechanism. Under the flange is a resistor, and the wires are connected by solder joints to the wires that continue inside the scope to the reticle lamp. The flange is also sealed to the scope body by a gasket. The wires from the flange can also be disconnected from the rest of the circuit by a quick disconnect plug. This flange not only allows the lamp to be powered by the same battery as the motor, but also allows the lamp to be controlled by a switch mounted elsewhere in a more convenient location. This method is so different from the button cell/knob, and unique, that I believe this flange is part of the new invention.
 On this invention, the typical battery that powers a light/laser target illuminator, and the battery compartment end cap/switch are eliminated and replaced by a cylindrical plug. This plug has an insulated stud that passes through the center axis to make contact with the battery terminal inside the body of the light. This stud continues out past the outer end of the plug to attach a wire with a terminal eye. Perpendicular to the axis of the plug, a hole is bored through the body of the light and into the side of the plug. The hole in the plug is threaded, and the hole in the body of the light is sized to clear the outside diameter of the threads. A screw is inserted through the terminal eye of a wire, through the hole in the body of the light, and into the side of the plug. This serves as the other electrical connection to the light, and serves to retain the plug. This plug is also sealed to the body of the light by an "O" ring in a groove around the plug. And also the wires that extend from the light may be disconnected from the rest of the circuit by an in line quick disconnect plug. I believe that this way of powering the light/laser is so different from the enclosed battery/switch end cap, and unique, that this plug is part of this new invention.
 Due to the fact that the battery compartment of the laser target illuminator is not unique, and rather similar to a conventional flashlight, this part may be used on the laser target illuminator, or any conventional light that uses a round battery and a cap to contain the battery.
 This invention has a split spherical bushing to attach the target illuminator, and aim the beam of light. This is a round ball with a hole bored through it that matches the outside diameter of the body of the illuminator. This ring is then slit to form a "C" ring to allow the inside diameter to be squeezed smaller to grip the outside diameter of the illuminator. This ball ring is then held by a clamp that has an inside groove to grip the outside of the ball. Also the ring may be bored slightly off center to form an eccentric bushing to allow adjustment of the final drive gear mesh or belt tension.
 Due to the fact that the beam of light projected by the illuminator may not be concentric with the body of the illuminator, the aforementioned spherical bushing may not be necessary. In this case, the body of the illuminator is held in a strait cylinder bore clamp, and the beam is aimed by simply loosening the clamp, rotating the body of the illuminator slightly, and retightening the clamp.
 The physical layout of the motorized device when used on a gun telescope includes, but is not limited to the following: As viewed with the ocular lens of the telescope to the rear, the motor/trans. is located above and to the right of the body of the scope, in front of the windage and elevation turret knobs, with the shaft of the motor parallel to the axis of the scope, and the output shaft facing to the rear. The output shaft extends back in between the windage an elevation knobs to the final drive mechanism for the variable magnification. It is here that a set of counter rotating gears reduce the speed and transmit power to a secondary shaft positioned above the main output shaft and brings the power forward to the final drive for the target illuminator which is mounted in the same bulkhead that holds the motor/trans to the body of the scope. On the secondary shaft, what is referred to as the counter gear, is driven off of the main shaft. The counter gear is attached to a hub that is in the form of a split clamp, and by tightening a screw, this hub is able to grip tightly the secondary shaft. It is here that this screw can be loosened so as to allow the shaft to be repositioned in relation to the gear and then retightend to adjust the timing or synchronization between the magnification and the illuminator. This hub also has a groove across its rear face. The variable resistor sensor is positioned with its shaft facing forward and in line with the secondary shaft. The variable resistor shaft has a hole bored across, and a roll pin inserted through that hole. The roll pin is then engaged into the groove in the back of the counter gear hub to drive the sensor. The sensor may also be in the form of switches triggered by tumbling levers. These levers being on the main shaft. This method is shown in the provisional patent applications
 At the rear of the mechanism is a bulkhead that clamps to the body of the scope. The bulkheads are basically flat plates with holes bored through. For example, near the bottom of the plates there is a 1 inch bore with a cap split off to go around and clamp the plate to the 1 inch body of the scope. On the rear plate, above and to the right of the scope body is a 1/4 inch bearing bore for the main shaft, and above that is another bearing bore for the secondary counter shaft. On the front plate, above and to the right of the body of the scope, the rear face is recessed to accept the trans. and is bored through for the shaft and part of the face of the motor to project through from the other side. Above the trans. is a 1/4 inch bore for the front end of the secondary shaft, and above the body of the scope is another 1 inch bore with a cap split off to hold the illuminator. Connecting between the two plates are long spacers parallel to the axis of the scope, and the distance between the plates can be changed by shortening or lengthening the drive shafts and those spacers to accommodate any length scope. To the left of the body of the scope, attached to the edges of the front and the rear plate clamp caps is a bridge. This bridge has a channel cross section with the flat face out to the left. Attached to this face near the rear is the motor control module, and attached near the front is the battery compartment. The compartment holds 4 "AA" batteries that stand vertically and are arranged side by side and flat.
 The battery compartment cover is held closed by a screw with a large knurled head. This screw is captured so it cant fall out when loosened.
 The voltage out is able to be varied for the different requirements of the individual electrical accessories.
 The mechanism aforementioned is able to be taken off of the body of the scope by removing 4 screws that hold the clamp caps. The clamp caps being still attached to the bridge, and the bulkheads being held together by the long spacers, the mechanism can then be placed on the barrel of a rifle with a 1 inch outside diameter, and the cap screws reinstalled. With the obvious exception that this will no longer drive the variable magnification, the mechanism will otherwise still function to drive the target illuminator and other accessories.
 And furthermore, another bridge can be attached to the bulkhead plates on the top or on the right side to hold another accessory, and a final drive belt pulley or gear can be placed anywhere along either of the drive shafts to actuate any thing, in any direction.
 I will state again, that this patent is not limited to the above mentioned design, or layout of the components, but rather is intended for any motorized gun device that has not already been patented.
 The above mentioned design layout stands only as one possible example of how this device is universally adaptable to any gun related mechanical situation.
 The secondary counter gear hub has a drive pin projecting from its front face to engage a corresponding hole in the secondary counter gear.
 On this invention, the variable magnification change ring of a rifle scope, or, the beam angle width change ring of a laser/target illuminator, may be removed, and, replaced by a gear, or a cog tooth belt pulley, or a sprocket with its center machined/formed to match the inside dimensions of the original magnification change ring, or angle width change ring. Furthermore, the original scope/illuminator change ring may be used by adding on to it a bushing or round sleeve to form a smooth drum instead of whatever knurled or tapered or otherwise irregular the original shape of the change ring. Onto this smooth drum may be attached a sandwich clamp with specially shaped grooves to grab the end teeth of a rubber cog tooth belt, and when tightened to the drum by a screw, the sandwich layers make metal to metal contact while slightly compressing the rubber so as to make a tight grip. Also, a gear, or a sector of a gear, may be screwed to the drum. And also, the drum may have an embossed block with a hole bored through the block parallel to the axis of the scope/illuminator, and the side plates of a drive chain placed on either side of the block and a roll pin inserted through the side plates and block. The gear/sector, belt/clamp, or chain/block, may also be used directly onto the original scope/illuminator change ring.
 The variable resistor sensor is mounted in a flat plate and attached to the rear bulkhead by spacers and long screws.
 The double planetary gear internal ring gear is sandwiched to the front bulkhead by the transmission end cap.
 The transmission end cap is held to the bulkhead by long screws through ears on the cap. The cap has a hole bored through its center to bear the front end of the output shaft.
 The front end of the out shaft is machined to form a drive tang
 This drive tang engages a matching rectangular hole in the final stage planetary gear hub inside the transmission.
 The motor is protected by a rubber boot. The final drive gears at the front, and the motor, are shielded by a metal cover formed to wrap around from below the right side of the motor, up over the top to the left side of the target illuminator ring gear, and is attached by screws into the edge of the bulkhead and illuminator clamp cap. The target illuminator ring gear can still be reached by hand from underneath.
 The final drive at the rear is shielded by a formed metal cover that wraps from the top, over, and down the right side, and is attached by screws into the edge of the bulkhead. The battery/motor control bridge extends past the rear clamp cap to shield the mag change gear from the left, yet still allow the gear to be reached by hand, and allow screwdriver access to the secondary shaft counter gear hub clamp screw.
 The top of the rear bulkhead may have a notch machined to correspond to a raised projection on the top of the front cover so as to form iron sights.
DESCRIPTION OF VIEWS
 VIEW 1. Block diagram of invention with single motor. This should be used as the front cover illustration.
 VIEW 2. Block diagram with multiple motors and interface controller.
 VIEW 3. Schematic diagram of DIGITAL MOTOR CONTROL, or abbreviated DMC. I designed this circuit on my own with knowledge of resistor, capacitor, diode, and inductors, and an understanding of the basic transistor circuit acquired from my own experimentation. To help understand the basic transistor circuit, I recommend referencing the G.E.TRANSISTOR MANUAL copyright 1964 by the General Electric co., under chapter 7 digital circuitry, pages 199-201. Refer now to VIEW 3, transistors Q1, and Q2 form a modified schmitt trigger. This is a digital circuit in which Q1 is only in a state of full conducting or full off, and is controlled by Q2. When Q2 is conducting above a certain level Q1 is off, and when Q2 is conducting below a certain level Q1 is on.
 Starting with VR1 near its center, when S1 is moved to side A, current flows through R4, R5, the emitter-base of Q1, R6, R7, and charges through C1 to ground. Current then flows out the collector of Q1, through Q3, and into the base of power transistor Q4. Q4 then conducts bringing side B to ground. In this way this circuit automatically grounds the side of the motor that is opposite of whichever side is switched positive, and the motor begins to move. Then current flows from the base of Q1 through R2 to side B. In this way, Q1 is held on by its own output, or "latched" on. The movement of the motorized mechanism moves VR1 towards side B, and the lowering of the ohmage of VR1 increases the current through the emitter-base of Q2. Q2 then amplifies that current and increases the flow of current out the collector, and through R2. When the ohmage of VR1 falls below a critical point, Q2 shunts R2, and bypasses current around the emitter-base of Q1 turning Q1 and then Q4 both off. With Q4 off, current no longer flows from the base of Q2 through VR1. In this way this circuit has negative feedback.
 After Q4 turns off, current continues to flow through the emitter-base of Q2 and C3 for the short duration that it takes C3 to charge, then Q2 turns off, and allows Q1 to restart by the charging through C1, and through the induction of the motor, and the cycle repeats. This rapidly turns on and off, or digitally pulses the high current transistor Q4, and lowers the speed of the motor. Notice that I did not say that this reduces the current through the motor. When the motor is running at full speed, and Q4 is initially turned off, inductive reactance of the motor will cause the motor to spit a high voltage spike of polarity opposite to which the motor was energized. This spike can only be measured with an osciloscope, and without any shunt to hold it down, can rise to hundreds of volts. This spike has very little amperage, and will be absorbed by C2. The phenomenon here is, when the motor is running at full speed, and the circuit is triggered to step the motor down, the rapid switching of the power transistor will cause the motor to pump spikes into the capacitor faster than they can discharge back through the motor, thus causing the voltage at the motor to actually reverse. This brakes the motor and causes the motor to slow the inertia of the, mechanism faster than it would if the power were simply cut off. Once the motor comes down to low speed, the inductive reactance greatly diminishes, which has the effect of regulating the speed constant no matter the battery voltage. Then the motor glides gently into the mechanical stop of the mechanism and stalls. With the motor stalled, the ohmage across the motor is very low with almost no voltage drop, and raises the voltage at side B. Resistor R2 shunts R1/C1 and Q1 turns off. The circuit is now unlatched, and even though S1 is still held on, the only current drain is through R1 and R12 which in parallel is 11K. This circuit is symmetrical, and when S1 is returned to center, R1 and R12 discharge the start capacitors, and the circuit is ready to be reversed. Transistor Q3 compensates the current into the base of Q4 for various levels of battery voltage. Transistor Q5 slows the acceleration of the motor on start, and can be defeated by opening S2. The ability to control the motor makes it possible to have a mechanism that moves quickly, yet does not slam into the end. I designed this circuit entirely on my own, and it took 6 months. By comparison, making the mechanical parts of the scope was easy, and it served well as a test mule to judge the performance of the controller while I conducted experiments. And, after having run it back and forth over 1000 times the moving parts show no detrimental wear. This merge of mechanical and electrical components represents the ultimate in design excellence, and if what I have created has already been done, then I cant believe that it would not already be equally as popular as automobile power windows.
 VIEW 4. Scope mechanism from above left rear. At the rear of the scope above the eyebell can be seen the back of the variable resistor sensor. Down the'left side can be seen the bridge to which the DMC (not shown) and the the battery attach. Not seen behind the battery compartment, is a short bracket that ties the top of the front bulkhead plate to the bridge to support the inertia weight of the illuminator under recoil.
 VIEW 5. Above right front. Above the objective bell can be seen the laser target illuminator, and slightly below that and to the side, the motor. Both are held by the front bulkhead plate. Behind the plate, opposite the motor, can be seen the edge of the transmission end cap. Directly above the motor can be seen the secondary shaft drive gear to the target illuminator driven gear final drive. Immediately to the side of where the secondary shaft overhangs the front plate and above the motor can be seen the head of the screw that goes through the plate and threads into one of the long spacers that spans between the front and rear bulkhead plates. This spacer helps support the weight of the inertia of the illuminator under recoil, and protects the drive shafts from side impact.
 VIEW 6. Exploded. At the top can be seen the DMC. The two long drive shafts are shown with the components that go on the shafts lined up in the order of assembly
 VIEW 7. Transmission.
 VIEW 8. Front end of primary drive shaft showing flat surface of drive tang, collar and rollpin, trans. end cap, and second stage planetary gear hub showing rectangular hole to engage drive tang.
 VIEW 9. Opposite side of second stage hub showing chamfer at opening of drive hole so as to allow end play of gears without interfering with first stage hub sun gear.
 VIEW 10. Rear face of front bulkhead plate showing split off clamp caps, and recess for transmission internal ring gear.
 VIEW 11. Rear end of primary shaft showing flat drive surface, end play collar and set screw, drive gear to secondary shaft, and, drive gear to variable mag. showing aluminum collar pressed over nylon center of nylon gear, and extra large dia. screw. Nylon center locks the threads and wide end of the screw engages flat drive surface of shaft.
 VIEW 12. Final drive sleeve and sector gear that fit over the target illuminator beam adjustment ring.
 VIEW 13. Front end of secondary shaft showing cross drilled hole, spacer, illuminator drive gear, and drive pin. Gear is engaged to shaft by sliding down the shaft below the hole, inserting the pin through the shaft, and pulling the gear back up the shaft to engage recesses in the fade of the gear around the pin.
 VIEW 14. Rear end of secondary shaft, spacer, counter gear, counter gear hub, variable resistor sensor mounted in plate with long screws and spacers.
 VIEW 15. Sensor plate showing front end of VR shaft with roll pin inserted in cross drilled hole.
 VIEW 16. Front of counter gear hub showing drive pin to engage gear, and screw to close slit to clamp the hub to the shaft.
 VIEW 17. Rear of gear hub showing slot to engage sensor.
 VIEW 18. Side of hub showing undercut to thin the wall thickness so as to allow center bore to collapse and clamp shaft.
 VIEW 19. Rear bulkhead plate and plate spacers. Also variable mag. driven sector gear can be seen on scope mag. change ring.
 VIEW 20. Illuminated reticle flange to eliminate button cell/switch knob.
 VIEW 21. Control switches in formed sheet metal bracket attached to underside of scope eyebell.
 VIEW 22. First model with "micro" switch sensors and tumbling levers that are engaged by extra long set screws in collars held to the shaft, so as to allow operation by single output shaft that revolves over 1 full revolution. Also can be seen is the cog tooth belt drive with belt clamp to grip the end of the open belt.
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