Abstract: An attitude and heading reference system (AHRS) for a vehicle is provided along with methods for mitigating vehicle acceleration effects in the AHRS. The AHRS comprises an inertial measurement unit configured to generate inertial measurements from at least one accelerometer and at least one gyroscope, a heading source configured to generate heading measurements, and an adaptive statistical filter configured to mitigate the impact of vehicle acceleration effects on attitude and heading.

Abstract: Described are methods for surface modification of an object (10) in order to increase the adhesive power of the object, wherein the surface (11) is subjected to structuring so that a multitude of projections (12) are formed, each comprising a foot part and a head part, wherein the head part comprises a front surface (13) which faces away from the surface, wherein each projection (12) is made in a size such that all front surfaces (13) project to the same vertical height above the surface (11), and form an adherent contact surface (14) which is interrupted by mutual spacing between the front surfaces (13).

Abstract: A method of making a composite plastic knob including the steps of forming a plastic core having a front wall of a generally uniform thickness with an integral discernible window portion formed in a fin projecting outwardly of the front wall and with the window having a thickness less than the generally uniform thickness of the front wall; positioning an anvil in the core in supporting engagement with the window portion of the fin and injection molding an outer covering of an opaque plastic of a contrasting color over the front wall of the core except for the window portion of the fin thereof. The knob includes a plastic core having a front wall of generally uniform thickness and an integral portion of a window formed in a fin projecting outwardly of the front wall. The window is thinner than the front wall of the core.

Abstract: A multiple-plastic stream co-extruder, as for injection-molding cavities, in which the extruder is internally provided therewithin and therealong with a restrictor or throttle pin, rod or element that forces combined plastic material streams, formed with an interior core stream encased in outer and inner stream layers, into corresponding concentric annular flow stream layers that are ultimately split transversely in opposite directions into a cavity gated to the extruder, and with the core stream at a region of zero gradient in the transverse flow velocity profile within the extruder and cavity.

Abstract: A urethane hammer or other hand-held striking tool having a handle portion cast of a lower durometer, more flexible grade of urethane material, and a head portion which is cast around a metallic weight at the end of the handle portion. The flexible handle absorbs shocks, while the hard material of the head provides a durable, effective striking surface. The tool is cast using a two-stage process. In the first stage, the handle portion is cast with the metal weight located in its end. The handle portion is then placed in a second mold in which the weight on the end of the handle extends into a larger cavity corresponding to the head portion of the tool. The higher durometer urethane material is then cast in this cavity so as to encase the weight and the end of the handle portion.

Abstract: A method of removing dam bars (15) from leads (17) of a semiconductor chip package (10) is performed by first breaking a bond between the dam bars (15) and excess mold compound (12) from a mold compound (11). The bond is broken by slight movement of the dam bar (15). Thereafter, the dam bar (15) is completely removed by moving the dam bar (15) further, without causing chips or cracks in the mold compound (11).

Abstract: A method for the integral molding of a thermoplastics top on the edge of a cardboard tube, the plasticized synthetic plastics material being injected into the mold cavity formed by inner and outer mold parts, the mold parts being pressed against each other with force. To produce relatively thin plastics parts with a high degree of dimensional accuracy in the very shortest time and by using simpler tools, the mold cavity in a first stage is maintained at a large volume during which the plasticized synthetic plastics material at least partially fills the mold cavity under a relatively low pressure, the mold cavity being in a second stage conveyed to a smaller volume than that of the first stage, the clamping force for pressing together the inner and outer mold parts being increased in the second stage in relation to that in the first stage.