![]() ![]() To fully explain the function of the capacitor is beyond the scope of this article, but suffice to say that it is exactly the same job that the capacitor in a Kerrering distributor does: increases the output voltage somewhat and reduces burning of the points. This oscillation is effectively an alternating current which is exactly what a transformer requires to do its job of stepping up the voltage. The answer to this was to simply use the primary coil to generate a strong magnetic field in the iron core to open electrical contacts which in turn interrupt the primary current, and thus the magnetic field collapses allowing the contacts to come together again and start the whole cycle anew resulting in an on-off-on-off oscillation. The complicated part of all this arises when one realizes that the power supplied by the car's battery is Direct Current which cannot pass through a transformer. The input coil (called the 'primary') has the lower number of turns and the output coil (called the 'secondary') has a much higher number of turns. In very basic terms, a transformer is two insulated windings of wire around a shared iron core. Your typical 'wall wart' transformer that is used for charging your cell phone or such is doing the opposite: dropping the house line voltage down to the very low voltage for th ephione's battery management system. There is a story that Thomas Edison possessed one when he was a teenager and enjoyed giving unsuspecting people rather nasty shocks because it is essentially a transformer that 'steps up' the low voltage of a battery (six volts or so) to the very high voltage required by the spark plug (around 12,000 volts or more). The Ford coil is a very close relative of the classic induction or Ruhmkorff coil, and as such has its origins in the early 1800s. This has the advantage that if the engine is really worn and has little compression, there is a good chance that it will still run.ĭuring the years when the Model T Ford was very commonplace, the coil was known by many names (some not very polite when they were misbehaving) but the most common of these is 'buzz' or 'trembler' coils. The Ford 'T' coil, when selected by the timer, will give a continuous shower of sparks. the engine must be turning) for any spark to be generated. One other major difference is that both the Kettering distributor and high tension magneto need to be moving (I.e. This timer is vaguely similar to a more conventional distributor, except that it is operating at low voltage rather than at spark plug voltage as in a Kettering system (which is simply the much more familiar high tension distributor with points) or a high tension magneto. One of the many fascinating design aspects of the Model T Ford is its ignition system which consists of a separate, easily removed sparking coil for each cylinder and a 'timer' that is driven directly off the end of the camshaft and which selects the appropriate coil for the cylinder that is about to fire. I made this traditional animation tutorial for those interested.Similar but not the Same The Model T Ford Coil and its Ignition System But like Figma, it can do a few very cool things that make it worth it over other tools. It is like Figma, but with raster abilities, but it is very old sadly (Adobe bought it, and shelved it). I use an old tool made by a friend of mine as well called Fireworks, in place of Photoshop. ![]() I use Figma for a dozen things, including as a scratch pad of ideas, for making blueprints, designing new inventions, web page layout, UI design, etc. In the 80s and 90s I created many video games for Nintendo, PlayStation, 3DO, the Amiga, PC, Mac, and many more. I invented and designed Disney’s Animation Software before most of you were born LOL (true). My Twitter which is not design-focused, but often a 30K review of design, interface, UI, UX, as it applies to software, hardware, and (cough) humans. My name is Reichart, I live all over the world.
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