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Michael
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Stewart
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Joined: 05 Nov 2003
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Stewart

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Michael

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Stewart

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Michael

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Michael

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Posted: Mon Mar 29, 2004 4:38 am Post subject: re: AHHH!! HMMMM............ |
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Hi Stewart,
Okay, look closely on the left hand side. The weight and gear attatch to the arm (if that is a weight and gear-or pulley perhaps). The arm is bolted to another arm, but I think it's really a pivot point. It looks like there is a 45 degree bracket supporting it, and if that's the case it wouldn't pivot. But follow the left hand side of the bracket, and you'll see it's actually a jack that terminates near the end of the arm. look very closly, you'll see it go up and down, and the last segments (there are only three) are smaller than the main one. It leads me to believe this isn't a bracket, but a compression jack system that works on either side. The left side shows it as being a possible compression system. If you count the number of pivots starting at the weight-gear/pulley, there are four. The weight-gear/pulley, on it's arm which rotates to the next arm with the jack/s, which rotates the main arm, which also rotates- and only half of it shows.
Mike
DOAH! Sorry that should be a four pivot system.
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Jonathan
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Stewart

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Posted: Mon Mar 29, 2004 6:22 am Post subject: re: AHHH!! HMMMM............ |
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Hi Michael
Thanks for trying to explain in more detail - still can't see it yet, but I'll keep trying. I thought the attached image might be useful to help rule out things that are on the other side of the page - hope it helps. I think you're right about the stand itself pivoting - it looks like there is a very faint dot in the base - if so then this could be the center of the wheel. I also now think there are rings around the small "weights" (see attachment).
red = MT135 on back of page
Green = fairly sure it should be there
Blue = not sure it should be there
While creating the last image I've noticed a few other things. I'll post more later.
All the best
Stewart
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Jonathan

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Stewart

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Michael

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Posted: Mon Mar 29, 2004 9:24 pm Post subject: re: AHHH!! HMMMM............ |
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I guess I should have said that I thought the circles were trace lines made by the weight/gear shift-movement. I also see (possibly) other indications of weights, but without showing the arm/s in that area.
You know the compression jack on the toy page? The one that the segments get smaller and smaller? Imagine it cut in half, with only three segments. That's what I see. It is faint, as I say, but I see it. Can anyone else see what I am seeing?
Jonathan, I have to disagree about M.T. 143. Although the drawing looks sloppy (or was MADE to look sloppy) if you look on the right hand side paired weights you'll see that the center's of gravity, shown by the termination lines at the end of the trace path, align EXACTLY on the horizontal- to the centers of the gears. = Balance. But not on the other ones. The termination lines are higher, starting where the gears connect,= movement.
Mike
P.S. Can someone send in an enlarged pic of the lower left hand corner of 142, where the circle is-and a bit of the area surrounding it, and i'll try to show you what I mean. Perhaps twice the size of the one you sent in of the whole image Stewart?
Thanks.
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Stewart

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Michael

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Jonathan

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Posted: Mon Mar 29, 2004 9:58 pm Post subject: re: AHHH!! HMMMM............ |
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You are completely right Steward. Judging by the clarity of the apparently useless thing that looks like a right angle triangle, hypotenuse to the left, with horizontal lines in it, at about 5 o'clock in the picture, it is likely that the vast majority of the dots and dashes on the page aren't supposed to be there, so I think my orange thing and the second axle like thing aren't supposed to be there.
I think the cirlces were probably cylinders, not spheres, just for ease of construction.
Now if I'm visualizing this device correctly, it seems to me that those long arms will maintain the same orientation relative to the outside, without using a solid connection to the outside as the parallelogram device does. Further because of this, the placement of the X shaped struts that are probably stoppers will determine at what position of the whole device that the arms will stop maintaining their position relative to the outside. This is way easier than coming up with a way to engage/disengage a parallelogram device, as Michael has suggested, and yet has the same results. The only trouble would be to design the device so that the joint doesn't leak.
I still disagree Michael, on one side he managed to draw the endpoints at horizontal, on the other he didn't. You'll notice that on MT142, the line that Steward thinks is a water line is in fact not horizontal, but quite close. I now think that it is water, and the fact that it's not acting exactly like water makes me think that it just wasn't that well drawn. On MT143, it should have been glaringly obvious to him that the flipper-floppers were drawn too big for the stand when the dotted lines pass right by the horizontals. In fact there was no reason for them to be drawn that big since there is an enlargement of them shown about the device.
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