Adrian Godwin gives the world an EESU powered elevator....key if you want your elevator to be powered without a power cable always plugged in...or in case the power supplied by that line fails. Hhhhmmm, how many traditional ultracaps would it take to pull off such a feat? My guess is about 2 trillion but I didn't get very far in math.
It's a good read, so I'll quote at length:
In a vertical transportation device as disclosed herein, a capacitive device is used as the primary power delivery system to provide power to the stator of a fixed magnet linear motor system. The capacitive device is carried by the passenger cabin and may be used instead of or in conjunction with an emergency power supply. During ascent of the passenger cabin the capacitive device provides power to the stator 120. In this way, the passenger cabin may make an upward journey without receiving power from an external source after it has left the ground floor. The capacitive device receives a full charge or a top-up charge at the lowest point of its cycle. The charge is delivered to the capacitive device from an external power source via electrical contacts on the passenger cabin.
In descent of the passenger cabin, the linear motor may be used as a generator by connecting an electrical load to the stator. The linear motor then acts to retard the descent of the cabin and to generate electricity, which is used to recharge the capacitive device. Thus, in a complete ascent and descent cycle of the passenger cabin, the capacitive device loses only a small proportion of its charge, the proportion dependent on the motor and generator efficiency, and losses due to, for example, friction. Top-up charging is also required to replace the power consumed by the on-board electrical systems of the passenger cabin during its cycle around the shafts. This charge loss is overcome by top-up charging the capacitive device at least once during a cycle of ascent and descent. This charge takes place at the bottom of the cycle to ensure the passenger cabin has enough energy to reach the top of the building.