Abstract: Provided is an adjustable gas valve for use in a firearm gas block having a cylinder and piston. The valve includes valve body configured to associate with the cylinder and has an exhaust port. A regulator adjustably occludes between none and all of the exhaust port.

Abstract: A firearm stock with adjustable cheek rest has a base having a base side portion configured to overlay a selected major face of the stock, the base having a base upper portion connected to the side portion and configured to extend over the uppermost crest line to the opposed upper surface away from the selected major face, the base upper portion having a first base upper portion surface configured to overlay the first stock upper surface, and a second base upper portion surface configured to overlay the second stock upper surface, and a cheek piece connected to the base and movable with respect to the base between a lower position and an upper position, and a plurality of intermediate positions. The base side portion, first base upper portion surface, and second base upper portion surface may be adhered to various portions of the stock.

Abstract: A split sprocket for use in a modular conveyor belt is disclosed. The split sprocket includes first and second portions that may be selectively arranged in a first configuration in which the sprocket maintains a fixed axial position on the shaft and a second configuration in which the sprocket can axially float along the shaft.

Abstract: A firearm stock with adjustable cheek rest has a base having a base side portion configured to overlay a selected major face of the stock, the base having a base upper portion connected to the side portion and configured to extend over the uppermost crest line to the opposed upper surface away from the selected major face, the base upper portion having a first base upper portion surface configured to overlay the first stock upper surface, and a second base upper portion surface configured to overlay the second stock upper surface, and a cheek piece connected to the base and movable with respect to the base between a lower position and an upper position, and a plurality of intermediate positions. The base side portion, first base upper portion surface, and second base upper portion surface may be adhered to various portions of the stock.

Abstract: An adjustable cheek rest for a rifle stock having a butt with opposed major faces and an uppermost crest line separating opposed first and second stock upper surfaces each angling in opposite directions angularly offset away from a vertical direction associated with the uppermost crest line. The cheek rest comprises a base having a base side portion configured to overlay a selected major face of the stock; the base having a base upper portion connected to the base side portion and configured to extend over the uppermost crest line to the opposed upper surface away from the selected major face; the base upper portion having a first base upper portion surface configured to overlay the first stock upper surface, and a second base upper portion surface configured to overlay the second stock upper surface; and a cheek piece connected to the base and movable with respect to the base between a lower position and an upper position, and a plurality of intermediate positions.

Abstract: A method of forming an activated coating composition is disclosed. The method includes providing (a) boron nitride, (b) carbon, (c) aluminum oxide and (d) a liquid carrier. Each of the boron nitride, carbon and aluminum oxide are in particulate form. The coating composition is activated to form an activated coating composition. The activated coating composition includes active components having from about 60.0 wt % to about 90.0 wt % boron nitride, from about 16 wt % to about 24 wt % carbon and from about 4 wt % to about 6 wt % aluminum oxide. A coating method, coated substrate and activated coating composition are also disclosed.

Abstract: A stage apparatus for a microscope includes a first stage provided on a mirror base of the microscope and fixed to a stage member that moves in an optical axis direction, a second stage that relatively moves over a surface of the first stage in a first direction, a third stage that relatively moves over a surface of the second stage in a second direction, the third stage having a placement portion for placing a microscope slide, and an exterior cover for covering at least a portion of the second stage and the third stage, the exterior cover being fixed to the first stage or the stage member. The exterior cover provides a space for the second stage and the third stage to move, and exposes the placement portion of the third stage.

Abstract: Embodiments are directed toward a charging handle for a firearm. The charging handle preferably has a base, a shaft, a latch, and left and right levers pivotably coupled to the base by respective pivot pins and configured to disengage the latch from an upper receiver. The base preferably defines four substantially vertical mating surfaces. The entirety of each of the first and third mating surfaces contacts the left lever when pulled rearward. The entirety of each of the second and third mating surfaces contacts the right lever when pulled rearward. The third mating surface is preferably disposed at an acute angle to the first mating surface as measured forward and outward from the third mating surface. The fourth mating surface is preferably disposed at an acute angle to the second mating surface as measured forward and outward from the fourth mating surface. Accordingly, stress on the pivot pins is relieved.

Abstract: Provided is a foot attachment adapter for a firearm support device having at least one leg. The adapter includes a body configured to attach to a leg of a firearm support device and a socket. A foot having has an attachment portion that is configured to be detachably received by the socket. A temporarily deformable elastomeric member is positioned at least partially in the socket to allow insertion of the foot portion and to releasably hold the attachment portion in the socket.

Abstract: An encoder comprises first and second sensors which reads first and second tracks, the first and second sensors being arranged in a radial direction to face each other, and a processor which generates a first position signal based on first and second periodic signals based on a signal obtained by reading the first and second tracks by the first sensor, and generates a second position signal based on third and fourth periodic signals based on a signal obtained by reading the first and second tracks by the second sensor, wherein the processor generates an absolute position signal indicating an absolute position of at least one of the scale, the first sensor, or the second sensor based on the first and second position signals and the first and third periodic signals.

Abstract: Horizontal motion conveyors for moving material are disclosed. The horizontal motion conveyor includes multiple drives. The second drive may float relative to the first drive. The conveyor may be made successively longer by including additional floating drives. Each drive may include a motor such as a servomotor that is connected to the driveshaft that drives the horizontal motion of the conveyor. A control system may control the rotation and positioning of the shafts.

Abstract: Horizontal motion conveyors for moving material and methods for reversing such horizontal motion conveyors are disclosed. In some embodiments, the horizontal motion conveyor includes a motor such as a servomotor that is connected to the driveshaft that drives the horizontal motion of the conveyor. In some embodiments, the speed profile of the pan may be changed to reverse direction of the flow of material on the pan without slowing or stopping the drive motor.

Abstract: Various embodiments provide a cardiac mapping method including: generating an activation map of a heart based on electrocardiogram (ECG) data of a heart and a three-dimensional (3D) heart model; performing an electrophysiology (EP) procedure to determine a first pacing location; pacing the heart at the first pacing location using an EP catheter; determining whether the pacing at the first pacing location generates a desired cardiac response; displaying guidance information related to a second pacing location on one or both of the activation map and the internal surface map, when the first pacing location is determined not to generate the desired cardiac response; moving the pacing catheter to the second pacing location, based on the guidance information; and pacing the heart at the second pacing location.

Abstract: A firearm stock with barrel-centering feature has an elongated body defining an elongated receiver channel and an elongated barrel channel, the receiver channel defined in part by a flat floor surface facing in upward direction, the receiver channel defined in part by opposed sidewalls extending above the floor surface, a fastener facility at the rear of the receiver channel operable to connect to the tang of the receiver, and a lateral adjustment facility forward of the fastener facility and operable to secure the receiver in a selected lateral angle of pivot about the fastener facility, such that the barrel is centerable within the barrel channel to avoid the barrel touching the stock. The lateral adjustment facility may include a set screw having an axis parallel to the floor surface of the stock. A pair of set screws opposing each other may secure the action in a selected lateral position.

Abstract: A optical target assembly is disclosed herein. The optical target assembly is movable about orthogonal pitch, yaw and roll axes and includes a reflector, a pitch and yaw angular sensor assembly, and a roll sensor assembly. The reflector is configured to engage a source of laser light. The pitch and yaw angular sensor includes a laser light sensor and an angle detection sensor. The pitch and yaw angular sensor assembly is configured to measure 360 degrees of motion about the pitch and the yaw axes. The roll sensor assembly is configured to measure 360 degrees of motion about the roll axis. The reflector can include an aperture configured to permit a portion of laser light incident on the reflector to pass through the reflector and onto the laser light sensor. The roll sensor assembly can include a roll angle sensor and a roll level sensor coupled to a two-dimensional pendulum.

Abstract: Various embodiments enable an introducer for a catheter to be rotated around an axis and/or traversed backward and/or forward along the axis. In various embodiments, positioning of an introducer may be enabled by an introducer support configured to be rotated around an axis and/or extended or retracted along the axis. The introducer may be manually operated and/or operated by motors in a nose cone of a catheter positioning system. In various embodiments, a portion of the introducer support may be configured to flex. In other embodiment, positioning of an introducer may be enabled by an adjustable nose cone of a catheter positioning system.

Abstract: Various embodiments include a catheter positioning device that may include a sled member, a sled base, an active damping system, a sensor, and a control system. The sled member may be configured to accept a handle of a catheter. The sled base may be configured to move the sled member along a length of the sled base for positioning the catheter within a patient. The active damping system may be configured to apply a force to the sled base to resist movement of the sled base in response to a control signal. The sensor may be configured to generate signals in response to a movement of the sled base. The control system may be configured to receive sensor signals from the sensor and transmit control signals to cause the active damping system to apply the force to resist movement of the sled base indicated in the received sensor signals.