Abstract: The invention is directed to an adaptor for converting a conventional office chair into a multifunctional office/fitness chair. The adaptor comprises a seat connector, a pair of rowing shafts, a seat post holder, and a foldable footrest. By adjusting the angle of the backrest up to 120°, a user can use the converted chair either as a conventional office chair, or as a fitness chair capable of assisting the user to do sit-up exercises in a rowing motion which focuses the exercise forces on the abdominal muscles, burns abdomen fat pad, and therefore effectively reduces waist line. Further, because the rowing motion is assisted by the backrest and armrest, the risk to injure the neck or back is eliminated.

Abstract: Method for measuring cable loads in a mineshaft (2), comprising the steps: provision of cable load measuring elements (6) on the conveyor means, provision of a cableless transmitter for cable load measured values on the conveyor means (4), connected to the cable load measuring elements, provision of a cableless receiver (12) for cable load measured values at the level of the surface of the mineshaft, provided with an output interface, measurement of the cable loads on the conveyor means by means of the cable load measuring elements for generating cable load values; and transmission of the cable load values in a cableless fashion between the transmitter (10) and the receiver for cable load measured values; and evaluation by means of an evaluation program with specification of the correction values.

Abstract: The invention is directed to an adaptor for converting a conventional office chair into a multifunctional office/fitness chair. The adaptor comprises a seat connector, a pair of rowing shafts, a seat post holder, and a foldable footrest. By adjusting the angle of the backrest up to 120°, a user can use the converted chair either as a conventional office chair, or as a fitness chair capable of assisting the user, including an overweight person, to do sit-up exercises in a rowing motion which focuses the exercise forces on the abdominal muscles, burns abdomen fat pad, and therefore effectively reduces waist line. Further, because the rowing motion is assisted by the backrest and armrest, the risk to injure the neck or back is eliminated.