Every time I open the WordPress site I get a dashboard that lets me control the weblog. Every time I get into my little Suzuki I sit behind a dashboard that lets me control the car. It is a comfortable place to be in both cases and I can see the wisdom in naming the set of electronic quizzes and sliders that we operate for sites and computers the same as the automobile – we are nearly all familiar with one somehow.
Well, leave the weblog and the computer aside and follow along to a couple of car shows as I look at the dashboards. I find them a fascinating insight into the minds of both the designers and of the society they serve.
The first dashboards literally dashed the mud aside as buggies and wagons followed horses. I’ll bet that the horses were not fooled – they could think of ways of spattering the people behind them anyway. But the dashboard of the wagon might only need to have a footrest, and no other controls. This leaked onto the first horseless carriages – they have few things happening in front there either, though they start to add pedals and switches to deal with braking and transmissions. Sometimes with the acceleration of the engine, though in many of the old cars this was still happening around the steering wheel.
Sometimes pipes and gauges were added to cope with fuels, or water, or oil. There might even be electrical gauges if the driver needed to know what was going to fail next…
Gradually the gauges took on more significance and prominence. People might not have needed to know how fast they were going early on because they were not going fast at all. When they sped up, someone wanted them to slow down, and quantified that – speed limits were evolved and drivers needed to know how quickly the vehicle was moving. The speedometer appeared. Followed by the speed trap and the fine.
Technical brother to the speedometer was the tachometer – how many revolutions per minute the engine was making. The driver could use the information to decide when to shift gears, if the screaming of the transmission or the passengers did not supply the signal. Old timers probably paid more attention to this one and regulated themselves in their district on hills and turns they knew by watching their revs.
People needed to know how much petrol or other fuel was in the tank and for a long time the only way they could determine this was a dipstick in the tank. That or a glass gauge with a tube in it somewhere near the tank. Or sticking their tongue in the tank. It was a long time before a reliable petrol gauge appeared on the dashboard…and I am waiting any week for one to show on mine…A guess is as good as a mile in many cases and that is how far you’ll be walking when you ignore the little floppy needle.
Oil? All engines and many navies needed it, but the original measure was a dipstick on the crankcase for when you had it and a grinding clank when you didn’t. The idea of putting an oil gauge on the dash to worry the driver came along pretty quickly but it was generally done by means of a tube from where the oil pressure was to the gauge in the dash where the needle swung over. The inevitable vibration and fatigue fracture would send the hot oil somewhere unpleasant. It was quite a while before they thought of a sensor and electrical reporter for this.
Electricity, coming or going, is invisible. You only ever hear it when you are holding a spark plug lead and the block and some comedian cranks the engine over. Then it makes a noise like bad words. For some time the designers did not really know what to measure as far as electricity went and there were few sensible gauges. Eventually they settled on a little bobbing needle that went one way when you were using it up and the other way when you were making more. You could even measure the battery to see how much electricity was in there but it was always a blasted lie.
Most other measurements and reports were only commentary. Various makers decide to tell you or not, depending upon the market and whether they thought you wanted to know or would understand the message.
Will post later…must dash…