Jaime Jones, reporting to Sprint CEO Marcelo Claure, is president of the East Area for Sprint. His territory covers 28 U.S. states in 10 regions across the Northeast, Mid-Atlantic, Midwest, and South, as well as Puerto Rico and the U.S. Virgin Islands. Â» Read More.
Spring Loaded Hinges. One specific model of self closing door hinges, uses the friction caused by opening the door to pull a spring. This spring uncoils as the door is opened, and when you let go, the spring closes the door by pulling back to its natural state.
How Does a Doorbell Work? Electromagnets and Chime Bars. A doorbell rings because there is a piece of flat metal that presses against a hot wire running beneath the button. When the metal touches it, the circuit is completed and the electrical current races toward the chime box, which is where the noise originates.