Abstract: A dust extractor device of a router has rotatable dust trap part able to be connected with a foot plate of the router and arranged to the side of the routing tool underneath the foot plate, such dust trap part being open toward the routing tool. The foot plate has an access opening for the routing tool. The dust trap part is constituted by an extractor hood with a hood casing at least essentially centered on the axis of rotation and a hood floor. The hood casing and the hood floor extend in the peripheral direction through an angle equal to or less than 180°. The extractor hood is open at its top side and opens into the access opening. The top end region of the extractor hood is rotatably supported on a holder, which is detachably secured to the foot plate and in the position of use extends around the access opening.

Abstract: A grinding disk (13) for manually held, motor-driven grinders (1) has a centrally arranged fastening recess (15) open at the grinding disk upper side with an internal thread arrangement (16), with which the grinding disk (13) can be screwed onto a connecting part (8), which is arranged on the side of the grinder and is driven for the grinding motion during operation, and which connecting part has a thread section (11) with an external thread arrangement (12), which is associated with the internal thread arrangement (16) of the grinding disk (13). The internal thread arrangement (16) is formed by a multiple thread with at least two thread courses, which are arranged angularly offset to one another. The diameter ratio between the diameter of the internal thread arrangement (16) and the outside diameter of the grinding disk (13) is at least approximately 0.25.

Abstract: A dust extractor device of a router has rotatable dust trap part able to be connected with a foot plate of the router and arranged to the side of the routing tool underneath the foot plate, such dust trap part being open toward the routing tool. The foot plate has an access opening for the routing tool. The dust trap part is constituted by an extractor hood with a hood casing at least essentially centered on the axis of rotation and a hood floor. The hood casing and the hood floor extend in the peripheral direction through an angle equal to or less than 180°. The extractor hood is open at its top side and opens into the access opening. The top end region of the extractor hood is rotatably supported on a holder, which is detachably secured to the foot plate and in the position of use extends around the access opening.

Abstract: A grinding disk (13) for manually held, motor-driven grinders (1) has a centrally arranged fastening recess (15) open at the grinding disk upper side with an internal thread arrangement (16), with which the grinding disk (13) can be screwed onto a connecting part (8), which is arranged on the side of the grinder and is driven for the grinding motion during operation, and which connecting part has a thread section (11) with an external thread arrangement (12), which is associated with the internal thread arrangement (16) of the grinding disk (13). The internal thread arrangement (16) is formed by a multiple thread with at least two thread courses, which are arranged angularly offset to one another. The diameter ratio between the diameter of the internal thread arrangement (16) and the outside diameter of the grinding disk (13) is at least approximately 0.25.

Abstract: In order to scan a rather large field of view quickly, the field of view is imaged, by an imaging optical system, in the plane of a detector having a substantially linear array of detector elements. The path of rays comprises a rotating optically refracting wedge for causing a nutating movement of the image and, coaxial therewith a rotating Dove prism for causing rotation of the image. The wedge and the Dove prism rotate at different rotary speeds.

Abstract: An optical scanning device comprises a bearing portion (12), which is rotatably mounted in a base portion (10) about an axis of rotation (16). A holder (18) is rotatably mounted in the bearing portion (12) about an axis of rotation (22), which is eccentric with regard to the axis of rotation (16). A pair of lenses (26,38) is located eccentricly in the holder (18) and forms part of an imaging system, through which a field of view is imaged in the plane of a base portion-fixed detector. The bearing portion (12) and the holder (18) are driven in opposite directions.

Abstract: An air-to-air guided missile with solid propellant rocket motor is retained by a locking device having a blocking device during a predeterminable delay time after the rocket motor has been fired. Thereby, at high altitude or with a high speed, such a proportion of the propellant can be burnt off that the guided missile is not accelerated to an inadmissibly high speed.