1537: Sewing machine part
1538: Holds a floor lamp
1539: Sounding torpedo
1540: I think the spring is being used as a bushing more than a
spring, but that's all I can guess.
1541: Perhaps a truck for refueling a larger vehicle, such as a tank.
I thought perhaps a flamethrower truck, but the lack of armor would
make it suicidal.
1542: A wooden turbojet?
It's times like these which make me glad my bank is Dial-a-Mattress
Posting from Rec.crafts.metalworking as always.
1537) Hmm ... part of it looks like a remote valve for a high
vacuum system -- the motion is transferred through a metal
bellows which maintains the seal. However, I don't see any
reasonable seals where flange mounting would be expected.
1538) I think that this is upside down in the photo. Looks like it
might be for collecting "sample" being generated by the dog one
is walking. :-)
1539) I think that this is a high-frequency antenna for mounting
on rather high speed jet aircraft.
1540) This looks as though it were designed to transfer paper or
fabric from one wooden roll to the other, passing over the
free-rolling springs on the tops, and finishing up on the
second wooden roller.
I think that it may be for holding something like a sash for
embroidery work. The wing nuts can keep the wooden rollers from
turning while you work on a section, then be loosened to roll to
the next area.
1541) Interesting device. My guess here is a quick starter for
single-engined military aircraft. You drive the truck up to the
front of the aircraft, and slip the octagonal collar over a nut
in the center of the propeller, spin up the truck's engine, and
dump a clutch to spin it up quickly. I expect the clutch to be
a one-way one, to allow the engine to free wheel the coupler and
shaft. Once the plane's engine is running, the truck backs
away, and drives to the next plane to start it.
Obviously, the period is indicated by the style of the truck, as
well as the fact that the planes did not have a starter motor
1542) Hmm ... some kind of small scale wind tunnel -- for testing
small models. Again -- rather old, given the predomence of wood
in the construction.
Now to see what others have suggested.
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