johnsmachines

machines which I have made, am making, or intend to make, and some other stuff. If you find this site interesting, please leave a comment.

Trevithick Dredger Engine… hinges for the fire door.

No big deal?  This “little” task caused me quite a bit of heartburn.

I had redesigned the flat face of the boiler, including the door and had not really thought through the door design and hinges.

Needless to say, the original hinges as designed by Tubal Cain and Julius deWaal, were quite incompatible with my redesign.

There are NO original drawings of Trevithick’s original designs of this face.  The Rees Cyclopedia drawings do not include this face, and it is hard to tell if the London Science Museum reconstruction is original in this respect.  I did read somewhere that the firedoor in his engines was a casting, so I did not feel bad about silver soldering components to build up the final parts.

In the end, after a failed effort at making a hinge, I decided to wing it, and make something which would work.

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This is my interpretation of a Trevithick fire door hinge.  No idea if it approximates Trevithick reality, but I suspect that no-one else knows either.

The tricky bit was silver soldering the 5mm brass tube bits to the appropriate base, and not getting silver solder into the hinge itself.

It was tricky, but it works!!

 

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The latch, the catch, and the movement restrainer come next.  The hinge pin is the cobalt drill which I could not release after the soldering.  Oh well…  cobalt steel should work well.   Incidentally, the stainless steel cap screws will be replaced with studs and square nuts when I around to it.    Now thinking about the propane burner and tubing.

 

Antartica Again!

Large sections of Antarctica have been suddenly hidden from view on Google Earth Pro, using fake clouds and checkerplate patterns.

They ARE fake because 1. they appeared suddenly (just a day after I had posted photos of strange objects, with coordinates, and the “clouds” neatly covered the areas about which I had posted.   2. the “clouds” are present, despite turning off atmosphere in GEP.  3. the “clouds” are present in all dates of the timeline, extending back 20-30 years, and the cloud pattern is unchanging over those decades.

Well, the fake clouds are still there, obscuring the interesting area, so I spent some time looking at a nearby area beyond the clouded area.

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The red and yellow placemarks are those which the “clouds” and the “checkerplate” neatly cover.  The blue placemarks are those placed by me today.  They are not obscured, yet.   Take a look at what they are showing in the following photos.

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Zooming in a bit, still 665km above the surface, showing the position of the blue placemarks.  The checkerplate line zigzags across the screen and everything to the left is deliberately (IMO) obscured.    Scale is bottom left, and compass top right.

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Look at that straight line of odd objects.  I counted 28 of them, at about 1 km intervals.  From 14km above the surface.   Maginot Line?

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Zooming in closer.  Same again!  300m long, 200m wide, black centre, grey objects surrounding.   Still 2006.  They appeared in 2004 and disappear 2008.  2006 is the clearest year.   From 5km above surface.

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And another.   Dozens of them in this area.  These are NOT natural features.

And the huge black rectangular object which is still showing in Google Maps…

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 A Google Maps image said to be taken in 2018.

Open your eyes people.  There is stuff going on, and we are not being told.

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