3193 morse code receiver? crazy automated mailbox?!
3194 some kind of stopcock turner (I do hope it isn't a fence tightener!)
3195 bale/sheaf cutter, for portioning out feed.
3196 lecture theatre bench (arm rest incorporates area to write on, as
long as you're right handed).
3197 I'll guess at school tannoy.
3198 standing wave demonstrator? smoke emitted from holes on resonance?
3193 is some sort of wacky electric motor that runs off a dry cell
battery. But for the life of me I can't figure out how it's supposed to
work. Its design (and the fact that at least two of them exist) leads me to
suspect that they are to be used in place of steam engines in a model
3194 is the bottom half of a stilson wrench
3196 Some sort of writing bench. Seems a little short for a classroom. I
suspect that it is from someplace like a recruiting office or draft board.
Perhaps it is the bench that the Arlo Guthrie sat on in "Alice's restaurant.
Paul K. Dickman
3194 Part of a monkey wrench. The moveable jaw and nut are missing.
3195 Short scythe.
3196 Jury Bench
3197 Speaker from drive in theater.. Missing hook for window, but could
be a different type than I usually saw.
Nope, though it does kind of look like a mail box. A large battery fits on the
inside of it.
It's been around six weeks since I've posted a fence tool, might be a new
You're in the right ballpark.
It was marked as being from somewhere else.
I don't know exactly where this device was used.
Whoa, that's wacky. I like the way the speed is controlled by adjusting the
dwell between the contact and the lobe on the crankshaft.
I am still not sure how the other two rods are functioning.
Paul K. Dickman
"Paul K. Dickman" fired this volley in
It's an _attempt_ at 'continuous motion' cranks that have no dead-center
(actually, several, but overlapping).
If you look, you'll see that the rods float in the yoke they pull down.
As each rod (top to bottom) bottoms out, the yoke can continue to move
downward, being pulled by the next rod down. So each rod has its maximum
pull at a different part of the power stroke.
It doesn't _actually_ work to avoid the dead-center problem at the bottom
of the power stroke, but it still gives a smoother action to the motor,
allowing the power stroke to be developed over a longer throw of the
crank, avoiding high-torque and low-torque spots in the stroke.
Posting from the usenet newsgroup rec.crafts.metalworking as
3193) A demonstration electric motor, likely powered by a "type F"
dry cell (zinc-carbon) with screw terminals. Based on the size
of the "mailbox" structure.
Two electromagnets on the near side, and adjustable
spring-loaded switch on the top to apply power to the
electromagnets at the crucial point in the rotation of the
It looks as though there is a missing part on the end to join
the two brass straps -- and act as a switch.
3194) This one is simple -- the handle of a Stilson pipe wrench.
It is missing the jaw, and the threaded and knurled ring which
adjusts the position of the jaw.
3195) A knife for cutting something relatively soft by drawing the
edge across it -- and likely held in a guide to keep the blade
I can't tell whether there is any kind of tooth on the edge from
3196) A bench from a school lecture room, since there is no visible
storage place for books or paper.
3397) A low-quality hand-held microphone -- likely from a relatively
inexpensive tape recorder.
3398) This is an interesting variation on a stringed musical
instrument. Given by the apparent fact that the length of the
two strings is the same between bridges, and the bottom anchor
pins are connected to a pivoted bar, so both strings would have
the same tension (aside from frictional losses in the pivot), so
I think that it is intended for comparing the pitch of two
strings, likely from two batches. Probably used at a factory
which packages strings for sale for banjos, guitars, and the
like to make sure that the latest batch from the spring wire
factory has the same characteristics as the batch most recently
Looks like the "nut" at each end is a glass rod -- a good
Now to post and then see what others may have suggested.