Abstract: A work apparatus can be set down in a set-down position on a horizontal plane. A side surface connects a cover to a base and delimits the apparatus in the longitudinal direction in the direction perpendicular to the tool plane. A filter component is on the side surface and has a front half which with respect to the longitudinal direction is arranged in front of a back half of the filter's longitudinal extent. An imaginary tangential plane extends, in the set-down position, perpendicularly to the horizontal plane, and is tangent to the side surface only in the region of the filter's longitudinal extent only in the region of the back half of the filter's longitudinal extent and intersects the tool plane in front of the region of the filter's longitudinal extent.

Abstract: An apparatus has a tool having a tool plane and a handle. A longitudinal direction runs in the direction from the handle to the tool. An outer housing has an opening for cooling air. An electric motor is disposed in the housing and an air filter disposed on or in the opening. In a resting position on a horizontal plane, the base faces the plane. A cover lies opposite the base. A lateral surface interconnects cover and base. The outer housing, in a lateral view perpendicularly onto the tool plane, possesses a contour which in a projection onto the tool plane in the direction perpendicular to the tool plane delimits an imaginary housing surface. The filter in a projection onto the tool plane in the direction perpendicular to the tool plane possesses an outer contour delimiting an imaginary surface of at least 5% of the imaginary housing surface.

Abstract: A work apparatus includes a tool, a drive motor for driving the tool, at least one handle for guiding the work apparatus during operation, at least one electric heater for the handle, an electric energy store which supplies the drive motor and the at least one heater with electric energy, and a control unit which is configured to control the electric power supplied to the at least one heater. It is provided that the work apparatus is configured to provide the maximum electric power made available to the at least one heater as a function of a charging state of the energy store. The control unit only switches the at least one heater on and off, and the heater in the switched-on state is operated directly with the voltage provided by the energy store.

Abstract: A node for a radio communication network with dynamic reservation of transmission capacity is provided. Said node comprises a communication unit for communicating with at least one neighboring node, and at least one antenna coupled to said communication unit. In this context, the communication unit is configured to reserve transmission capacity on the basis of at least one RTS and/or CTS and/or nCTS handshake packet. In addition to this, the communication unit is further configured to limit transmission capacity reservation to a certain number of the at least one neighboring node on the basis of certain properties with respect to said certain number of the at least one neighboring node.

Abstract: The disclosure relates to a method for determining a sharpness condition of a saw chain of a chain saw. The saw chain includes at least one cutting link having an upper cutting blade. An upper cutting blade image of the upper cutting blade of the cutting link is recorded using an imaging device. An evaluation of the upper cutting blade image is performed using an evaluation unit, which includes an artificial neural network. A sharp condition and a dull condition of the saw chain are defined in the evaluation unit. The saw chain is assigned on the basis of the upper cutting blade image using the artificial neural network to the sharp condition or the dull condition.

Abstract: A multilayer circular grinding wheel includes at least three substantially planar layers including an inner layer and two outer layers immediately adjacent to the inner layer, of which at least the inner layer has a proportion of diamond abrasive grit, the proportion of diamond in the abrasive grit being greater in the inner layer than in the outer layers.

Abstract: A method and apparatus for grinding spheres of ceramic material, including the spheres with at least one grinding wheel containing abrasive grains bound in a synthetic resin. The abrasive grains comprise more than 50% diamond and less than 5%, Cr2O3.

Abstract: A method and apparatus for grinding spheres of ceramic material, including the spheres with at least one grinding wheel containing abrasive grains bound in a synthetic resin. The abrasive grains comprise more than 50% diamond and less than 5%, Cr2O3.