It's now time to start discussing the third of the possibilities for a mechanical perpetual motion that I mentioned back on 14 April 2014, i.e. extracting energy from the rotating Earth.
An interesting webpage
About a year ago, I found and bookmarked an interesting Chinese webpage on this topic, part of the pat365.com website titled "Laboratory for Expression and Retrieval of Patents." It displays as 世界专利信息试验检索平台 , and the URL for the page of interest is http://pat365.com/search/refineSearchAction.dotypeURL='getM'&refineSearch=pc/DE102008011487
75 German patents
I found a total of 75 patents, all German, at the URL given above. (I couldn't use it very well, because its navigation is in Chinese, and some of the patents are in German only, without English translations). Although the page of interest is titled 重力或惯性发动机 Gravity or Inertia Motors, several of the patents have at least some association with extracting energy from the rotating Earth, such as DE 102009034866, 102008036795, 102007062672, 102008003693, 102006057073, 102006053069, and 102006015324.
Patents on espacenet
The most comprehensive patent collection that I know of is the European Patent Office's at http://www.epo.org/searching/free/espacenet.html. If I know a patent number, I can always find it there. However, I have never had great success searching for particular topics there. No doubt that's partly my fault; however espacenet have done some annoying things in the past (like changing the prefix for Japanese patents to "JPS" without making their search engine tolerant for the older "JP" prefix which they had been using).
Patents versus the real world
From even a fairly cursory look at patents, it's obvious that there is quite a lot of interest in extracting energy from the rotating Earth. I had hoped to examine in detail some of the German patents mentioned above, but haven't done so; partly because the pat365.com webpage went offline for several months, and has only recently re-appeared.
Of course, anyone can apply for, and can usually get a patent; but the key question is — does the patented device really work? Next time I'll look at the most common idea for extracting energy from the rotating Earth, which is to use a gyroscope.
Technology Submission - State of the Art / ·1; Novel Rotary-Turbo-InFlow Tech / Featured Development - GEARTURBINE PROJECT Have the similar basic system of the Aeolipilie Heron Steam Turbine device from Alexandria 10-70 AD * With Retrodynamic = DextroRPM VS LevoInFlow + Ying Yang Way Power Type - Non Waste Looses *8X/Y Thermodynamic CYCLE Way Steps. Higher efficient percent. No blade erosion by sand & very low heat target signature Pat:197187IMPI MX Dic1991 Atypical Motor Engine Type / ·2; Imploturbocompressor; One Moving Part System Excellence Design - The InFlow Interaction comes from Macro-Flow and goes to Micro-Flow by Implossion - Only One Compression Step; Inflow, Compression and outflow at one simple circular dynamic motion Concept. To see a Imploturbocompressor animation, is posible on a simple way, just to check the Hurricane Satellite view, and is the same implo inflow way nature.
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