The Automated Doggie Door uses an inexpensive gearmotor to lift the door’s sliding panel but replaced the cable that typically would pull a load with a constant-tension spring, a patent-pending design ...

Spring are mechanical devices that store and apply kinetic energy. They’ve been around a long time and continue to play essential roles in a wide range of machines, vehicles, and engineering tools.

A novel technique for enhancing optical spring that utilizes the Kerr effect to improve the sensitivity of gravitational wave detectors (GWDs) has recently been developed. This innovative design uses ...