A guess for 795. You put it into something, turn the screw to push the
lugs out, and then pull it to remove the thing you've pushed it into
from some other thing into which it fits snuggly.
Hmm, having written that it's not much of a guess.
According to R.H. :
As usual -- posting from rec.crafts.metalworking.
793) Perhaps for cutting or scoring a groove in the edge of
A closer look at both ends of the blade clamped in it might help
794) A *very* old office dictation machine. It looks as though it
uses something like Edison cylinders.
795) This looks as though its function is to slide in a square tubing,
and then to be locked at a certain extension. Perhaps it is to
be an extendible leg on some furniture?
796) A "modular phone plug" model RJ-11. (RJ-13 is the six-conductor
one, and RJ-45 is the eight conductor one, which is used for
twisted pair ethernet among other things.
A somewhat narrower version is used for handset cords for phones
of a certain age.
797) It looks as though it is intended to pull chain links together,
perhaps to allow a "repair" link to be installed. And, at a
guess, the two notches in the faces of the flat jaws are to
close an opened link once it is in place.
798) The end of the pocket knife looks as though it is is intended
to smooth a surface by rocking back and forth in contact with
Perhaps for burnishing paper which has been erased by scraping
off the ink? In that case, the blades might be to cut a new
point in a quill pen?
Now to see what others have said.
When can you safely go back to the Roman numerals? They make
this thread easier to find -- but obviously you don't want them
classified as porn spam, which I believe was the reason to abandon
temporarily the Roman numerals in the first place.
Actually, the "RJ" numbers are wiring patterns for specific
applications, not the connectors. They are named *p*c, for the number
of postions and the number of conductors.
That is the 4P4C wired as a four conductor handset cord. The one in
picture 796 is the 4P4C, as used for handsets.
is a link to some
common RJ numbers.
Correct answers so far:
793. Stanley clapboard gauge
794. Ediphone dictation machine
795. Not sure about this tool yet
796. Telephone plug
797. One of the functions of this multi-tool is a can opener, but I don't
know if the wrench is for a specific purpose. I haven't had time to search
the patent date.
797. Also don't know about the pocket knife.
I'm going to be away from my computer until sometime on Saturday, I'll post
the answer page tomorrow night.
I'll save you the trouble, it is patent number 286,458.
"Combination Tool: for houshold use".
I had to look it up, so I didn't think it was all that fair
to post an answer right away.
I'll see if I can put something together about searching via
classes sometime soon (per the other thread/question). It
takes some work and learning and isn't for the impatient or
I think I found this, January 25 1916, patent number
"Device for applying pressure: Particularly adapted for use
in quoins for use in locking forms of type in chases."
Thanks to "795 - looks like a chase lock for a printing
press; by Mark, at 10/13/2006 1:42 PM" on the Blog comments
page for the clue I needed to find this.
I guess the more technical term for this is a "Quoin", which
1 a: a solid exterior angle (as of a building) b: one of the
members (as a block) forming a quoin and usually
differentiated from the adjoining walls by material,
texture, color, size, or projection
2: the keystone or a voussoir of an arch
3: a wooden or expandable metal block used by printers to
lock up a form within a chase
This wasn't a word I was familiar with, but the third
meaning from Merriam-Webster seems to fit well.
794: is a "record" recorder. It was used to create I believe 78 rpm
albums. These were quite the rage.
796: in its current configuration thats a "line cord" for a RJ-14 or
RJ-25 jack. Better known as a telephone cord. Because it does NOT have
only 2 wires it would not typically be used with an RJ-11 jack, though
it could be. IF you only were interested in the "1st line" The wiring
is inside to out. Meaning the inner two wires would be line 1 (
Red/green ) and the outer two would be "line 2" (yellow/black.).
ORINGALLY yellow was a power line for the lighting circuitry on the
"princess" style phones with the black providing the ground as the
"dialtone" on a landline phone is -48vdc.
798: has all the "looks" of a barlow knife. The rounded hammer head
suggests a shaping usage.
Hmm ... the phone company (the originator of these, IIRC) uses
RJ-48 for both of the wiring patterns on the identical connector for a
feed from a T1 box on the side of the house to the DSU in the house.
The only difference is the suffix which indicates the differing wiring
pattern for the transmit and receive pairs. The one which I am using is
RJ-48C. I forget what the other one was.
However -- the 8-pin connector involved is usually referred to
as a RJ-45
I don't believe so. The one shown has the fatter side walls,
producing a connector the same width as the 6-pin version. You can see
the grooves which would accept the extra blades (and in this case,
simply prevent damage to the wire pins in a 6-conductor jack).
The 4-pin used in the handsets (at least in the old ITT one in
my hand at the moment) is narrower, and does not have the unused grooves
outside the four in actual use.
But -- it does not show the RJ-13, and a Google search for that
seems to be confused by someone who has been posting under the name
I've been lurking here for a bit, but haven't posted before. I don't
know what 795 is, but I'm pretty sure they aren't printers quoins. I
can't pretend to be a world-class expert on quoins, but I did spend
three years working with old printing equipment at a historic
restoration on Staten Island, and I've never seen this style of quoin
before. Furthermore, they don't look to be well adapted for the
purpose. First of all, quoins have to generate a _lot_ of force. The
form is almost an inch thick of solid lead and is held in place
entirely by the friction resulting from the force that the quoins exert
at the edges. All the quoins I've ever seen are wedges with vertex
angles on the order of ten degrees. This device seems to have vertex
angles more like eighty degrees, meaning it's designed to quickly take
up a relatively large amount of slack, but generates relatively little
force. Second, this device appears to be designed to exert force
between two surfaces that are significantly out of parallel. That
wouldn't be an issue in a printing form. Third, with the actuating
screw on the end like that, the device would be rather awkward to
tighten in a chase. The quoins I've used have either been actuated by
a key inserted from the top (the side, in the photo), or are driven in
place with a mallet and "shooting stick."
I'm not 100% sure, but that isn't how I'd make a set of quoins if I
were designing them.