Abstract: A retrieval system for a container having a dip tube and designed to hold a liquid, with a retrieval head which can be fastened to the dip tube, so that liquid can be retrieved from or supplied to the container via the dip tube and the retrieval head. The retrieval head has a liquid channel in which the liquid retrieved from or supplied to the container is conducted. An opening is provided in the wall bounding the liquid channel, wherein when the retrieval head is fastened to the dip tube the opening is closed in such a way that it is secured against the entering of gas, and wherein when the retrieval head is unfastened from the dip tube the opening is no longer closed, so that gas enters the liquid channel via the borehole.

Abstract: A retrieval system for a container having a dip tube and designed to hold a liquid, with a retrieval head which can be fastened to the dip tube, so that liquid can be retrieved from or supplied to the container via the dip tube and the retrieval head. The retrieval head has a liquid channel in which the liquid retrieved from or supplied to the container is conducted. An opening is provided in the wall bounding the liquid channel, wherein when the retrieval head is fastened to the dip tube the opening is closed in such a way that it is secured against the entering of gas, and wherein when the retrieval head is unfastened from the dip tube the opening is no longer closed, so that gas enters the liquid channel via the borehole.

Abstract: An actuator for activating a plurality of operating functions in a technical system may include one or more of the following: a rotary knob, the rotary knob being rotatable about a rotational axis to an actuation position corresponding to a first operating function of a plurality of operating functions; a first sensor unit, where the actuation position is detectable by the first sensor unit such that a corresponding actuation position signal is sent to a control unit of the technical system causing activation of the first operating function; a second sensor unit for sending a shut-off signal to the control unit, where the technical system is set to a basic function of the plurality of operating functions upon receipt of the shut-off signal; and at least one sliding track partially encircling the rotary knob radially over an angle of less than 360.

Abstract: An actuator for activating a plurality of operating functions in a technical system may include one or more of the following: a rotary knob, the rotary knob being rotatable about a rotational axis to an actuation position corresponding to a first operating function of a plurality of operating functions; a first sensor unit, where the actuation position is detectable by the first sensor unit such that a corresponding actuation position signal is sent to a control unit of the technical system causing activation of the first operating function; a second sensor unit for sending a shut-off signal to the control unit, where the technical system is set to a basic function of the plurality of operating functions upon receipt of the shut-off signal; and at least one sliding track partially encircling the rotary knob radially over an angle of less than 360.

Abstract: An optical measurement system comprises a first housing body and a second housing body which can be rotated relative to the first housing body about a second axis of rotation, wherein the second housing body contains a measurement telescope, an inner roller bearing support fixed to the second housing body and protruding into the first housing body; an outer roller bearing support fixed to the first housing body; a drive disc fixed to the inner roller bearing support; wherein a motor having a motor shaft is attached to the first housing body in such a way that the motor shaft or a wheel fixed to the motor shaft is positioned on the drive disc and is pressed against said disc by a spring force orientated transversely to the second axis of rotation, and wherein the motor shaft or the wheel is coupled to the drive disc in a frictional fit.

Abstract: An optical measurement system comprises a first housing body which can be rotated relative to a base about a first axis of rotation; a second housing body which can be rotated relative to the first housing body about a second axis of rotation, wherein the second housing body contains a measurement telescope, the measurement axis of which is orientated transversely to the second axis of rotation; an inner roller bearing support fixed to the second housing body and protruding into the first housing body; an outer roller bearing support fixed to the first housing body; a drive disc fixed to the inner roller bearing support; wherein a motor having a motor shaft is attached to the first housing body in such a way that the motor shaft or a wheel fixed to the motor shaft is positioned on the drive disc and is pressed against said disc by a spring force orientated transversely to the second axis of rotation, and wherein the motor shaft or the wheel is coupled to the drive disc in a frictional fit.

Abstract: A method and an apparatus for determining the quality of a gearing system is described. The method includes the steps of setting a sequence of target angles of rotation of a first gear wheel, measuring for each of the target angles of rotation an output angle of rotation of a second gear wheel, and calculating a plurality of theoretical output angles of rotation. The method also includes obtaining angle of rotation differences between the plurality of output angles of rotation and the plurality of theoretical output angles of rotation, forming a sequence of cumulative values, and determining, based on the sequence, a first amplitude value, a second amplitude value or a third amplitude value.

Abstract: A motor drive apparatus for a surveying instrument and a control method for controlling a surveying instrument enables a fast rotation of an instrument axis with high angular resolution. The motor drive apparatus for a surveying instrument includes a first motor for rotating an instrument axis. The first motor includes a stator and a rotor having a rotation axis and a plurality of step positions relative to the stator. The motor drive apparatus also includes a mounting unit for mounting the first motor so as to be pivotable around the rotation axis and an adjusting unit for rotating the stator of the first motor around the rotation axis.

Abstract: A method and an apparatus for determining the quality of a gearing system is described. The method includes the steps of setting a sequence of target angles of rotation of a first gear wheel, measuring for each of the target angles of rotation an output angle of rotation of a second gear wheel, and calculating a plurality of theoretical output angles of rotation. The method also includes obtaining angle of rotation differences between the plurality of output angles of rotation and the plurality of theoretical output angles of rotation, forming a sequence of cumulative values, and determining, based on the sequence, a first amplitude value, a second amplitude value or a third amplitude value.

Abstract: A motor drive apparatus for a surveying instrument and a control method for controlling a surveying instrument enables a fast rotation of an instrument axis with high angular resolution. The motor drive apparatus for a surveying instrument includes a first motor for rotating an instrument axis. The first motor includes a stator and a rotor having a rotation axis and a plurality of step positions relative to the stator. The motor drive apparatus also includes a mounting unit for mounting the first motor so as to be pivotable around the rotation axis and an adjusting unit for rotating the stator of the first motor around the rotation axis.