Abstract: The invention relates to a method of cooling electronic circuit boards using surface mounted devices (SMD), the method comprising the steps of: after or during the board layout, filling empty spaces V1, V2, V3, V4, V5, V6, V7, V8, V9, V10 with at a number of heat sink devices 1, 2, 3, 4, 5 near a thermal hot spot and connecting the number of heat sink devices 1, 2, 3, 4, 5 to a thermally conducting path 25, 27, 29, 31, 33, 35 of the board N, respectively. Further, the invention relates to a heat sink device 1, 2, 3, 4, 5 adapted to implement the method according to the invention.

Abstract: The invention relates to a method of cooling electronic circuit boards using surface mounted devices (SMD), the method comprising the steps of: after or during the board layout, filling empty spaces V1, V2, V3, V4, V5, V6, V7, V8, V9, V10 with at a number of heat sink devices 1, 2, 3, 4, 5 near a thermal hot spot and connecting the number of heat sink devices 1, 2, 3, 4, 5 to a thermally conducting path 25, 27, 29, 31, 33, 35 of the board N, respectively. Further, the invention relates to a heat sink device 1, 2, 3, 4, 5 adapted to implement the method according to the invention.

Abstract: The invention relates to a method and an arrangement for measuring power for an optical user signal transmitted via an optical fiber by converting the transmitted optical user signal into a pulsed optical measurement signal, the pulse repetition rate of which is dependent on the power of the transmitted optical user signal, and evaluating the pulse repetition rate of the converted optical measurement signal in order to ascertain the power of the optical user signal transmitted via the optical fiber.

Abstract: The invention relates to a method and an arrangement for measuring power for an optical user signal transmitted via an optical fiber by converting the transmitted optical user signal into a pulsed optical measurement signal, the pulse repetition rate of which is dependent on the power of the transmitted optical user signal, and evaluating the pulse repetition rate of the converted optical measurement signal in order to ascertain the power of the optical user signal transmitted via the optical fiber.

Abstract: A scissor hitch assembly for use with a ground-level loading trailer which allows the ball hitch coupler to remain attached to the towing vehicle while the ground-level loading trailer is in its lowered or ground-level position. When in its travel position, the scissor hitch assembly is secured through a travel pin. When the ground-level loading trailer is to be lowered, a single individual can simply remove the travel pin from the scissor hitch assembly and allow a portion of the scissor hitch assembly to slowly lower through the assistance of gas springs.

Abstract: A trailer for use as an ice fishing house or for transporting a load from one area to another has a frame and a load bearing platform attached to the frame which is capable of being moved from a travel position to a ground level position. A lifting mechanism is located on each side of the trailer and made a part of the rubber torsion stub axle assembly connected to the trailer frame with the lifting mechanisms being operated by arm and handle assemblies attached to rubber torsion stub axles. When the arm and handle assemblies are rotated to a vertical position, the trailer frame is lowered to the ground level and when the arm and handle assemblies are rotated to a horizontal position, the trailer frame is raised to the travel position. Two securing means are used on each lifting mechanism to secure the frame in the travel position.