A method for manufacturing magnetic metal powder is provided. The frame includes a projection extended from each of the levers for engaging with the arms and for securing the arms of the spring biasing member to the levers of the frame. Some aspects comprise: an ingress memory subsystem receiving cells on an ingress port exceeding an error threshold. The satellite-positioning module is configured to receive a satellite-positioning signal. The sensors are able to provide information to the processor that enables the processor to correlate user interaction with images in the 3-D coordinate system. Such accumulators are adapted to store the energy generated by the electrical machine associated to the elevator apparatus, and the energy coming by a source and optionally not used by the machine, as well as to deliver the stored energy towards the machine when this requires energy with a power higher than a threshold.