Here's a set of instructions for operating and maintaining the replica of Charles Babbage's mechanical computer -- the storied difference engine -- built and displayed in 1991 at London's Science Museum to commemorate the bicentenary of the birth of Charles Babbage.
If the Engine is being demonstrated on a daily basis, lt should be oiled and greased at least once a week. If no demonstrations are taking place, then the Engine should be oiled and greased on a monthly basis, but the handle should be turned at least twice a week to cycle the mechanisms.
Grease : "Alvania" grease or it's equivalent should be used.
1. all vertical motion cam profiles only and their levers.
2. all bevel gears above and below the cam stack.
3. all bevel gears on the carry axes and those on the carry drive shaft.
4. the phasing gear, register pinion, "Impact tooth and the tw-in tooth drive.
5. the pawl wheel and crank pinion.
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Mattel’s Hello Barbie has a microphone and a wifi interface, and it transmits the phrases it hears to a central server in order to parse them and formulate a response. Mattel claims that the data isn’t being retained or harvested for marketing purposes, and assures parents that they can make Barbie stopping eavesdropping on them […]
I blogged the announcement of the Qwerkywriter more than a year ago, when the company was retooling from its successful kickstarter to full retail production. I’ve had one of the production models in my office for a couple of months now and I’ve been very impressed! (I wrote this review on it).
Carrying this EDC card is like slinging around a handheld toolbox wherever you go. Its minimal design is small enough to fit in your wallet’s billfold, and it’s TSA-compliant so you’ll never leave it behind. It’s got hex wrenches, metric and imperial rulers, flathead and Phillip’s screwdrivers, and a bottle opener so that you’re ready […]
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