Abstract: The hand which a user is using to hold an electronic device can be determined by analyzing data captured by one or more motion sensors on the device. The curvature to the motion can be indicative of handedness, and processing motion features using a classifier algorithm can enable the determination of handedness with a corresponding confidence. In some embodiments, motion data is collected over a monitoring window, and handedness values are accepted when the handedness value remains the same with at least a minimum confidence for at least a minimum number of window periods. A determination of handedness enables an operating system and/or applications executing on the device to adjust one or more operational or interface aspects in order to make it easier for the user to operate the device using the hand currently holding the device.

Abstract: A device that operates a user interface (UI) that depends on the position of the user's head. The device estimates the head position using motion sensors. The device establishes an initial estimated position of the head and tracks the device's movement from an initial reference position to determine the new position of the head. If the head crosses a position threshold the device may partially re-center the head to avoid large errors.

Abstract: A cutting implement comprises a substrate having a cutting edge, and plurality of hardfacing beads deposited on the substrate transverse to the edge of said substrate.

Abstract: A cutting implement comprises a substrate having a cutting edge, and plurality of hardfacing beads deposited on the substrate transverse to the edge of said substrate.

Abstract: A shearbar comprises an elongated mild steel body 10 having a top surface 14 covered with a layer of hardfacing material 16 along at least one longitudinal edge 18 to act as a counter knife to a rotary cutter. To resist the development of a wear gully on the vertical side of the body 10 below the cutting edge of the hardfacing material 16 the body has a region 22, having a hardness intermediate that of the steel body and the hardfacing layer, extending along and immediately below the longitudinal edge 18 of the hardfacing layer. In one embodiment the region is an inlay of tool steel. In another embodiment the region is formed by heat-hardening the corners of the body 10 itself.

Abstract: A shearbar comprises an elongated mild steel body 10 having a top surface 14 covered with a layer of hardfacing material 16 along at least one longitudinal edge 18 to act as a counter knife to a rotary cutter. To resist the development of a wear gully on the vertical side of the body 10 below the cutting edge of the hardfacing material 16 the body has a region 22, having a hardness intermediate that of the steel body and the hardfacing layer, extending along and immediately below the longitudinal edge 18 of the hardfacing layer. In one embodiment the region is an inlay of tool steel. In another embodiment the region is formed by heat-hardening the corners of the body 10 itself.

Abstract: An improved air gun for firing paint balls, pellets,, consisting of a passively venting and freeze resistant regulator, a pressure differential trigger mechanism, and a muzzle break with angled sidewalls. The freeze resistant regulator regulates incoming high pressure gas to a user predetermined pressure to operate the gun while avoiding freezing of the regulator associated with frigid incoming compressed gases and high firing rates. This is accomplished by using a heat transmission component formed by the engagement between a hemispheric shaped tip of a regulating pin and a hemispheric cavity of an adjustment piston. Passive venting of gas from the gun upon removal of the pressurized gas supply is provided by the regulator using a reciprocating regulating pin and adjustment piston which combine to compress a seal into a seat only when pressurized gas is attached to the air gun. Once detached from a pressurized air supply the compressed air in the gun vents through the seat.

Abstract: A shank adapter for a rock drill, which is used to connect one end of a drill string to a rock drill, has a chuck end (10) made from one piece of material and an opposite, threaded end (16) made from another, different, material. The chuck end and the threaded end are permanently joined to one another in one stage of manufacturing.

Abstract: A sensor is provided for transillumination of a blood-profused portion of a human fingertip. The sensor includes an opaque, semi-cylindrical substantially rigid cradle member having a photosensor mounted to a concave surface thereof such that ambient light cannot penetrate the cradle member and induce erroneous readings. A flexible planar web-like support structure is attached at one end thereof to the cradle member and includes a light source mounted within the web thereof. A repositionable adhesive coating on the concave surface of the cradle member holds the fleshy portion of a human fingertip in conformance therewith, and when the flexible planar web-like support structure is wrapped around a fingertip within the cradle member, the light source overlies the photosensor for transillumination of the fingertip.

Abstract: Microporous waterproof and moisture vapor permeable products are described which are formed from a matrix having an internal microstructure which is coated with a hydrophobic material. A process is described including the steps of (1) applying to the surface of the matrix a liquid hydrophobic material, (2) allowing the liquid to penetrate into the microstructure and then (3) drying, vulcanizing or curing the product.

Abstract: A process for producing a semi-interpenetrating polymer network of polytetrafluoroethylene and silicone elastomers is described which comprises the steps of (1) intimately blending a mixture of a major amount of unsintered and unfibrillated particulate polytetrafluoroethylene dispersion resin and minor amounts of (A) a hydrocarbon liquid and (B) an addition curable silicone composition consisting essentially of a polydiorganosiloxane having alkenyl unsaturation, an organohydrogenpoly-siloxane crosslinking agent, a catalyst for promoting crosslinking of said polysiloxane, and an inhibitor for the catalytic reaction; (2) forming said blend into an extrudable shape; (3) biaxially extruding said blend through a die into a shaped extrudate product having a randomly fibrillated structure; (4) evaporating said hydrocarbon liquid, and activating said catalyst so as to generate a cured silicone elastomer and polytetrafluoroethylene semi-interpenetrating polymer network comprising said fibrillated extrudate structure.