Abstract: An actuator (10) and adapter (16,116), in particular with an electric motor (60), and a highly reduced gearing (48), is used for transmitting a torque to a continuous drive shaft (24) of at least one flap or at least one valve to control a gas or liquid volume flow. The adapter (16,116) which is used in particular in the sector of heating/ventilation/air-conditioning (HVAC), fire and space protection can be fitted in a manner which is locked against rotation in the radial direction to a frame or support of the actuated member. With the drive shaft (24,124) it forms a releasable frictional and/or positive connection. The actuator is preferably actuated by an electric actuator motor but also pneumatically, hydraulically or manually. The actuator (10) and adapter (16,116) can optionally be used as a bridging drive.

Abstract: The invention relates to an actuator (10) for actuating a device in a linear manner by means of a tangential rod which can be displaced in a longitudinal manner by converting the torque of a motor-driven pinion (32), in particular for a flap or for a valve in the field of heating-ventilation-climatisation (HLK), or fire and smoke protection. According to the invention, a normal threaded rod (24) which can be displaced in the axial direction thereof (L) and which can be cut to an individual length, has a radius (r) which is rotationally secured in the actuator (10). The pinion (32) in connected in a positive fit to at least one drive wheel (36) which is mounted in a freely rotational manner, and an elastic and/or adjustable pressure element (38, 54, 64, 66) which carry out a play-free engagement of drive wheels (36) and the normal threaded rod (24).

Abstract: The disclosed arrangement is of the type for a short tonearm which is guided over the record so that the tonearm remains tangential to the grooves of the record. The tonearm is balanced mechanically on a single point bearing, with the phono cartridge to one side and a counterweight to the other side of the bearing. A permanent magnet fixed to the top of the tonearm interacts with a stationary magnet closely spaced from it to hold the tonearm vertically. The tonearm magnet is a vertical, round, solid cylinder section, while the stationary magnet is a parallelepiped with facing width equal to the diameter of the facing tonearm magnet. This constrains the tonearm to prevent it from tipping to the side, while permitting rotation about the vertical axis and about a horizontal axis through the point bearing and perpendicular to the tangent to the record groove.The improvement comprises that the stationary magnet is provided with a winding.

Abstract: The disclosed arrangement is for a short pickup arm used with a tangential scanning system. The arm is supported on a single jewel thrust bearing and held against sideways tilting by a pair of attracting magnets, one mounted on the arm above the bearing and the other fixed above the first. This permits the arm to move freely in a plane parallel to the record and in a plane perpendicular to the record and tangent to the grooves. The center of gravity of the arm is chosen to be on a line between the bearing point and the stylus point in order to minimize the effects of outside disturbances.