2503 I've never seen this before, and I'm amusingly confused.
At first glance, this seems to be a simple drafting tool to transfer a
setting to or from a divider, using a vernier to get 1/1000 inch
accuracy. One would put one point of the divider in one of the 1/4"
spaced dimples, the other point in the movable dimple, and set/read the
Now for my confusion...
Putting the divider points in dimples in a steel plate would dull or
bend the points.
I'd doubt that the rounded bottoms of the dimples would give the
I don't get the meaning of "250 PITCH".
I'd expect a bunch of scratches from the divider points if this were
used the way I describe.
So, after a little thought, I have to guess this is not what I first
On 3/15/2012 4:04 AM, Rob H. wrote:
It is not for drafting dividers, but for machinist's dividers.
Fine screw adjust, and points whose purpose is to scribe lines in metal
during layout, so a lot tougher than the drafting points.
How rounded are they? Likely made by a prick punch to give the
proper shape for the accuracy.
Pitch in a screw is how far it advances for a full turn.
Commonly used for metric screws, but inch screws have the inverse, the
pitch divided into 1.000"
What it is saying is that the dimples are set at intervals of
0.250" -- and would be understood by a machinist.
It looks to me as though it was disassembled and the steel bar
with the dimples has been wire brushed under power.
And I commonly set them to steel scales (rulers) by placing one
point in an engraved line and adjusting the other to another line and
don't leave obvious scratches in the scales.
Actually -- with the exception of being made for machinist's
dividers instead of draftsman's dividers -- pretty close. (And a
draftsman would not need to set his dividers to that accuracy, as the
lines produced are typically thicker than that. The lines left by the
scriber points on the machinist's dividers (through a blue or red layout
die) are much closer to that 0.001" accuracy.
2503 special purpose angle finder, missing a part.
2504, never seen one of these. Dunno.
2505 levelling gage from a motor home?
2506 appears to be a section from a commercial shelving unit.
2507 probably a bottle and can opener.
2508, the metal ends look like maybe hair trimming ends?
But, why on an adze?
Christopher A. Young
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This week's set has just been posted:
2504 looks like a cart for those old, ancient engine testing machines. My
brother had one and it was huge, with a lot of leads, etc. I haven't seen
them in this configuration, but I have seen them this big.
2506 looks a little like those modular aircraft landing strips. These were
used extensively in WW II on soft ground. Just put them out and instant
airfield. I wonder if these sections fit together. If they don't, then it
is something else.
2503: Maybe for setting trammel points or dividers? or getting measure
from a caliper?
2504: A service cart with a flip-down tray. I have seen them set up
for a number of things. Don't know if this particular model had a
specific purpose, or is a generic service cart.
2507: can and bottle tool?
Posting from Rec.crafts.metalworking as always.
2503) A tool for setting the points of machinist's dividers or
trammels to with 0.001". One point is placed in the dimple
in the movable part in the arc below the center, and the other
in one of the line of marked dimples (markings in 0.500"
intermediate dimples in steps of 0.250". Then it is adjusted
until it gets the desired reading.
The inner scale appears to be marked from 0 to .250" (25), and
the outer scale is a vernier to give direct readings in steps of
0.010" and down to what appears to be 0.0025", so I'm not sure
how they get the claimed 1/1000" I'm presuming that the outer
scale is fixed, and the inner one moves with the dimple int he
Frankly, I would love to have one of those.
2504) The grating below the shelves suggests to me that it is for
working on an engine up on a lift. It rolls under, and various
things which are likely coated with oil are placed there,
starting with the oil drain plug and likely the oil filter.
(There should be some form of tray under that to catch the oil
drips.) The grid allows the oil to flow through, but even small
screws will not fall through.
2505) Some form of clinometer. I presume that the pointer is tapered
so the bulk of its weight is below the pivot screw. A side view
would have helped in this at least. The use of forward and
reverse pitch suggests aircraft use.
2506) Frankly -- no serious guess.
It could be used for storing a bunch of tool holders for a
miling machine -- likely 50 taper given the likely size. But
for that it would need to be horizontal, and the hook shaped
feet suggest that it attaches to a vertical surface.
2507) The bottom end could be used as a can opener.
The hole in the center could be used as a sort of wrench.
Not sure what the odd shape at the top end would fit.
Perhaps a military tool for a firearm?
2508) With all the replaceable teeth, I would guess that it is used
in chipping stone -- likely for something like rough forming of
gargoyles and grotesques or something similar.
Now to post and then see what others have suggested.
506 is called Marshal Matting. It was used on soft ground all through
the Pacific. I ran into it in VietNam, in the delta region, where it
was used in a compound where heavy equipment was serviced. Without it
the trucks would sink in the wet season.
2504 is a cart for ribbon wound steel strapping in shipping
applications. I saw this in the Uline catalog during lunch today.
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