Posting from usenet newsgroup rec.crafts.metalworking as always.
3079) At first glance, it looks like an old telephone switchboard
such as would be used at say a police station.
*But* -- it does not have jacks, or other provisions for making
connections between the different stations, so it is likely more
a signaling device. Either push buttons to sound buzzers in
various offices, or lights to signal that someone in the offices
has pressed a button, needing service.
It looks as though the bottom left-hand and bottom right-hand
devices are rotary switches -- perhaps to signal everyone, or to
turn on or off buzzers or the like.
3080) Hmm ... lever A likely moves a screw part way into the 'C'
frame -- but it may not move enough to become visible. Or
perhaps it retracts one to allow disconnecting something which I
think slides onto the cylindrical part pointing away in the
first photo.
Or does it perhaps withdraw the click stop allowing free
swinging of the lever?
The function of B and C are obviously to move a precise distance
relative to the frame, and the pin to allow the whole thing to
be tilted relative to the adjustment frame -- but *why* is not
clear.
3081) "Everyone has seen"? Perhaps not often from this side?
It could be something like a hub for a larger vehicle (eight lug
nuts if so),
Or perhaps part of the manifold for a really large carburetor?
Or The injection end for a fairly large rotary lawn sprinkler.
Too large to be an agitator in a washing machine -- either
clothes or dish -- at least not for home use.
Hub of a propeller -- with the apertures used to feed in
hydraulic fluid to change the pitch of the propeller blades,
and/or to expand de-icing boots on the blades. That would
indeed be something that not many younger people have seen
(since the dominance of jets for passenger aircraft.
3082) Hmm ... something like an automatic brake on a sliding rope
or cable? If the cable were threaded through the bobbin, and
then the lever were pressed down to allow it to be threaded
through the U-shaped hasp, rope sliding from upper-left to lower
right would release the hasp and lever when the end passes the
hasp, and that would clamp down on the rope -- though it would
resist more strongly going in the other direction. And is the
bobbin actually wood? Not really strong enough for this kind of
task, I would think.
3083) Aside from the parallel-jaw wood clamp holding it, I think
that the device is for measuring he thickness of something like
sheet metal -- looks like up to 1/4", and down to thinner than
1/64". The alternate markings are some gauge -- not the usual
where the smaller the number the larger the size, but rather the
inverse of that. Certainly not metric units, as you would have
25.4 mm per inch -- not 26 per 1/4"
There is presumably a spring under the plate which rotates it in
the direction of closed (smaller) when the trigger is pulled.
At a guess, I would say that either the workpiece is moving, or
it is too hot to approach with a normal micrometer.
The pointer is set to the desired thickness, so you have an idea
whether you are close to the right setting without having to
pull the dial close enough to read. Probably it would be set to
either point to the stop plate operated by the trigger, or the
ridge out the other side, depending.
I guess not for really hot material, because the operator would
have to pull it back and rotate the dial to re-cock it.
3084) Two possibilities come to mind:
a) For measuring hardness of wood or something similar,
with the narrow window barely visible in the handle a
gauge as to how much pressure is being applied.
b) Injection into meat or something similar (if those tips are
hollow), in which case the window would indicate the
amount injected.
Now to post and see what others have suggested.
Enjoy,
DoN.
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