When the injector is energized, an electromagnet moves a plunger that opens the valve, allowing the pressurized fuel to squirt out through a tiny nozzle. The nozzle is designed to atomize the fuel — to make as fine a mist as possible so that it can burn easily. The amount of fuel suppl...
In the 1920s the speaker was often a large full-range horn.1940sIn the 1940s these single horns evolved into one large DC-electromagnet woofer in a very large cabinet, with a large high-frequency horn tweeter on top. 1950sThe 1950s brought us 15" horn-loaded permanent-magnet woofers ...
If we lowerthe bridge, the current flows to the sounder. At the other end, the current energizes an electromagnet and this attracts the armature. The armature clicks down against a screw and taps out a message. The telegraph debuted in 1844, just five years after OK. It transmitted short ...
Additionally, the armored chestplate powered the electromagnet (the famous arc reactor in the films) that prevented deadly shrapnel from reaching his heart; thus, both the suit and the electromagnet were designed with the sole purpose of keeping Stark alive. The Iron Man armor was never designed ...
a great jobdemonstratinghow toggling an electromagnet can induce vibrations and haptic feedback in the trackpad, while Wired does a good jobdiscussing the importanceof some old research onlateral-force haptic feedbackat MIT in the 1990's. In short, though, small, high-frequency horizontal ...