Abstract: A device for hand-driven operation of a guided wheel arranged on a steering gear is pivotable about a steering axis perpendicular to the wheel's axis of rotation. The device includes first and second handles, first and second coupling devices respectively arranged thereon, and a power transmission train coupled to transmit traction power to the second coupling device via coupling points for transmitting handle movement to a drive device cooperating with the guided wheel's hub. The power transmission train extends from the first coupling device via deflecting elements, thereby modifying the extension direction of the train, in a second power transmission section to the second coupling device such that the coupling devices move the coupling points of the train on substantially linear drive paths approaching and absenting of a symmetrical plane of guidance which is oriented in a perpendicular manner in relation to the axis of rotation of the guided wheel.

Abstract: The invention relates to a device for hand-driven operation of a guided wheel (R) which is arranged on a steering gear (1) and which can be pivoted about a steering axis (L) which is oriented in a perpendicular manner in relation to the axis of rotation (D) of the guided wheel, comprising a first handle (20), a first coupling device (21) arranged on the first handle (20), a second handle (22), a second coupling device (23) arranged on the second handle (22), a guiding device (2) which can be pivoted about the steering axis (L) and which mechanically cooperates with the steering device (1) for moveably mounting the handles (20,22) and with a power transmission train (3) which is coupled in a traction power transmitting manner to the second coupling device via coupling points in order to transmit a movement of the handles (20,22) to a drive device which cooperates with the hub (N) of the guided wheel (R) and which converts the movement of the handles (20,22) into a rotational movement of the guided wheel (R), w

Abstract: The invention relates to a method and an apparatus (22) for removing solder from a circuit board (5) from which electrical or electronic components have been removed at soldering points. The invention is addressed to the problem of offering a method and an apparatus by which the residual solder can be entirely removed from the circuit board (5) and by which even a large area on the circuit board (5) can be freed quickly and easily of the residual solder. This problem is solved by a method in which the solder after melting is pushed away from the soldering points by at least one pushing means (13a) or displaced therefrom by a plunger element, and is then removed from the circuit board (5). The apparatus (22) according to the invention makes available the means needed for the purpose.

Abstract: For flip-chip mounting of a component with its contact surface on the contact surface of substrate, the component or the substrate is held at the free end of a lever arm which pivots around an axis, and the other part is held on a support. In a beam path between an optical device, especially a viewing device, and the contact surfaces of the two parts, a semireflecting mirror is provided to provide images of the two contact surfaces simultaneously in the optical viewing device. A first point on the one contact surface, a second point on the other contact surface, a third point on the mirror surface, and the pivot axis of the lever arm form the corners of a square. The beam path between the optical device and the semireflecting mirror is a beam path parallel to the optical axis of the optical device, the beam striking the mirror at an angle of approximately 45.degree..

Abstract: The apparatus for positioning electronic components on a printed circuit board or the like includes an optical system which allows to line-up the underside of the electronic component with the intended placement position on the circuit board. After proper positioning the circuit board relative the electronic component the later is placed on the circuit board and connected therewith.