Abstract: The invention relates to methods and arrangements for channel balancing of a wavelength division multiplexed optical signal. Channel balancing according to the invention is performed by using a resonator that provides a selection region in which a selected channel has a substantially increased poser density relative to channels out of resonance. The selected channel is attenuated a desired amount, i.e. a desired amount of power is removed therefrom, by adjusting the properties of the selection region. In a preferred embodiment, attenuation is achieved by adjusting the selection region such that destructive interference is obtained for the selected channel in a fibre carrying tile multiplexed optical signal.

Abstract: A crankcase scavenged internal combustion engine includes a cylinder and a piston reciprocating along the cylinder wall. At least one auxiliary duct is arranged with an auxiliary port in the cylinder wall. An inlet is divided into: a fuel inlet leading to a fuel port and an air inlet leading to an air port. The auxiliary port, fuel port and air port can be opened and closed by the piston. The piston also comprises a transfer space, which mouth edges are limited by the piston periphery, and which, in at least one piston position, creates a connection between the fuel port and the auxiliary duct's port, so that fuel can be supplied to the auxiliary duct via the auxiliary port, and then, after the port later on has been opened by the piston, can flow into the combustion chamber.

Abstract: Flange assembly for supporting a structure that provides scavenging air supply to an internal combustion engine at the carburetor to the engine. The assembly includes a thin-body flange that is configured to be abuttingly installed upon an end surface of the carburetor. The carburetor has its combustion air intake or port exposed at an outer surface for intaking air for the combustion process. The thin construction of the flange enables advantageous positioning of the adaptive flange. The relative dimensioning of the thin-body flange also contributes to its low-impact as a modification to air inlet arrangement. A combustion air aperture is provided that extends through the thin-body flange. The combustion air aperture is located in the flange for alignment with the combustion air intake. By this alignment, fluid communication is established across the flange and into the carburetor when the flange is abuttingly installed upon the carburetor.

Abstract: A jetting device and a method of jetting droplets of viscous medium onto a substrate. The jetting device includes a jetting outlet through which the droplets are jetted. The jetting device further includes a wall located at the jetting outlet, downstream of the jetting outlet seen in the jetting direction. The wall is provided with an orifice through which jetted droplets are permitted to pass through. A gaseous flow is provided within the space past the jetting outlet such that an adverse effect on the performance of the jetting device is prevented, the adverse effect resulting from the accumulation of viscous medium residue at the jetting outlet.

Abstract: A crankcase scavenged internal combustion engine (1) of two-stroke type, primarily intended for a handheld working tool, such as a chain saw, with a cylinder (2) and piston (4) reciprocating along the cylinder wall (3), which piston separates a combustion chamber (5) above it and a crankcase volume (6) below it, and in the cylinder wall (3) there are ports (7, 8, 9, 10, 10′) arranged for inlet (11), exhaust outlet (12) and for a number of scavenging durct (13, 13′), whereby at least one auxiliary duct (14) is arranged with an auxiliary port (15) in the cylinder wall, which auxiliary port (15) is opened and closed by the piston, and whereby the inlet is divided into: a fuel inlet (16) leading to a fuel port (7) and an air inlet (17) leading to an air port (8), and these ports are opened and closed by the piston (4), which also comprises a transfer space (18), which mouth edges are limited by the piston periphery, and which, in at least one piston position, creates a connection between the fuel port

Abstract: Crankcase scavenged internal combustion engine of two-stroke type (1) having at least one cylinder (15) and at least one air passage arranged between an air inlet (2) and the upper part of a number of scavenging ducts (3, 3′) with exhaust orientated scavenging ports (9, 9′) located close to the exhaust port (19) of the cylinder. At least one intake orientated scavenging port (14, 14′) is located close to the inlet port (33) of the cylinder and is fed by at least one scavenging duct (5, 5′), and the air passage and the scavenging ducts are so arranged that the scavenging ducts (3, 3′) can be supplied with and hold so much air that they during the following scavenging process will scavenge essentially nothing but air. The air passage is arranged from an air inlet (2) provided with a restriction valve (4) controlled by at least one engine parameter such as the carburetor throttle control.

Abstract: A muffler (1) intended for portable working tools, preferably chain saws, in which the muffler is mounted directly to the exhaust gas outlet (3) of the cylinder (2). The muffler is provided with at least one upstream partition wall (4, 5) at the muffler's inlet (6) from the cylinder and arranged essentially laterally in relation to the engine's cylinder bore (7), so that the partition wall (4) separates an upper fraction (8) above it, i.e. in the direction towards the upper side of the cylinder, and a lower fraction below it, i.e. in the opposite direction, and this dividing into two or several fractions (8, 9, 10) is kept maintained through a great deal of the muffler from the inlet to a number of outlets (11, 12, 13).

Abstract: Crankcase scavenged internal combustion engine of two-stroke type (1) having at least one cylinder (15) and at least one air passage arranged between an air inlet (2) and the upper part of a number of scavenging ducts (3, 3′) with exhaust orientated scavenging ports (9, 9′) located close to the exhaust port (19) of the cylinder. At least one intake orientated scavenging port (14, 14′) is located close to the inlet port (33) of the cylinder and is fed by at least one scavenging duct (5, 5′), and the air passage and the scavenging ducts are so arranged that the scavenging ducts (3, 3′) can be supplied with and hold so much air that they during the following scavenging process will scavenge essentially nothing but air. The air passage is arranged from an air inlet (2) provided with a restriction valve (4) controlled by at least one engine parameter such as the carburetor throttle control.

Abstract: A method of establishing transmission of light through a chirped Bragg-reflector, a method of analyzing the power spectrum of a light signal using a chirped Bragg-reflector, and an arrangement for analyzing the power spectrum of a light signal. The Bragg-reflector reflects, in an unperturbed state, essentially all incident light within a predefined wavelength range. The methods include the steps of directing the light to be analyzed into an input end of a light guiding structure, such as an optical fiber, which light guiding structure is provided with a Bragg-reflector, and sending an acoustic pulse along the light guiding structure, thereby effectively lowering the reflectance of the Bragg-reflector for a certain wavelength at a certain time. By monitoring the light thus transmitted through the Bragg-reflector, a power spectrum analysis of the incident light is obtained.

Abstract: Flange assembly for supporting a structure that provides scavenging air supply to an internal combustion engine at the carburetor to the engine. The assembly includes a thin-body flange that is configured to be abuttingly installed upon an end surface of the carburetor. The carburetor has its combustion air intake or port exposed at an outer surface for intaking air for the combustion process. The thin construction of the flange enables advantageous positioning of the adaptive flange. The relative dimensioning of the thin-body flange also contributes to its low-impact as a modification to air inlet arrangement. A combustion air aperture is provided that extends through the thin-body flange. The combustion air aperture is located in the flange for alignment with the combustion air intake. By this alignment, fluid communication is established across the flange and into the carburetor when the flange is abuttingly installed upon the carburetor.

Abstract: The invention is a spectrally selective optical coupler with a new geometry and a new principle of action. An optical coupler according to the invention includes an optical waveguide and an external resonator. In the waveguide, there is provided a deflector that is operative to deflect light of a predetermined wavelength into the external resonator. Coupling is enhanced by the deflected wavelength being resonant in the external resonator.

Abstract: A method of establishing transmission of light through a chirped Bragg-reflector, a method of analyzing the power spectrum of a light signal using a chirped Bragg-reflector, and an arrangement for analyzing the power spectrum of a light signal. The Bragg-reflector reflects, in an unperturbed state, essentially all incident light within a predefined wavelength range. The methods include the steps of directing the light to be analyzed into an input end of a light-guiding structure, such as an optical fiber, which light-guiding structure is provided with a Bragg-reflector, and sending an acoustic pulse along the light-guiding structure, thereby effectively lowering the reflectance of the Bragg-reflector for a certain wavelength at a certain time. By monitoring the light thus transmitted through the Bragg-reflector, a power spectrum analysis of the incident light is obtained.

Abstract: In a pickup head (1) for an automatic component assembly machine a house (5) is provided, which and a transmission (27, 29) is movable in a vertical direction (z-direction) by means of a drive motor (25) and is arranged on a horizontally (x-direction) movable wagon (3). The house (5) carries several pickup devices (11), which are movably mounted in the house and during the movement of the house (5) can be made to selectively accompany this in order to pick components. Therefor, the pickup devices (11) are resiliently biassed to a pulled down position by compression springs (21) and they can further be locked in an upper position by activating solenoids (31). These have locking pins (37), which during activation engage abutments (23) of each pickup device (11). The pickup head (1) can hereby, by driven by a single motor (25) simultaneously pick several components, what gives a quick picking function and hereby a quicker mounting.

Abstract: The invention relates to an industrial robot of a so-called agile type which has a lower arm (16) with double-sided journalling in a stand (12) consisting of two separated, upright parts (12a, 12b), the arm (16) being pivotable in the space between the stand parts. A pivot shaft (24) for pivoting the upper arm of the robot via a crank and a parallel link rod from one of the stand parts (12a) and through a lead-in opening (28) in the lower arm (16). From the other stand part (12b) there extends a drive shaft (30), which is substantially coaxially opposite to the pivot shaft (24) of the crank (22) and which is connected to the lower arm (16).