[CW] An arm looking for a key.

Tue Mar 19 13:33:10 EDT 2024

Richard,

Interestingly enough it does fit a Bunnell frame.
I found 2 Bunnell frames that fit, one is a skeleton frame and the other
is a Triumph style frame. The Bunnell arm is longer by about 7/8".
I have a Minominee frame but it does not work on that one. The
contacts do not line up.

It also fits an old Iron frame, possibly Bunnell, like what is found on a
KOB.
However the angle of the arm is not right, it sits too low at the contact
spacing adjusting screw.

The knob screw is removable, it is just a stud. Ahe arm is brass.

Bunnell must have made keys with a brass arm and a steel trunnion prior to
the
steel lever key in 1881. I do not have any catalog info on his early keys
prior to that date.
I tried the arm in one of the 1881 keys with the bolted uprights and bolted
wire connectors,
but it does not fit that style. The contacts do not line up.

This does not mean the arm is Bunnell but it is usable on at least 2 of the
Bunnell model frames.
Because of the angle of the arm on these frames it would seem it would have
been in a frame
with taller uprights or a much lower anvil contact.

73,
Don, NN8B

On Tue, Mar 19, 2024 at 2:17 AM Richard Knoppow <1oldlens1 at ix.netcom.com>
wrote:

>     I suspect the threaded nub for the knob is actually the threaded
> part of a knob which came out of the knob. I can't tell from the pix if
> it could be unscrewed from the lever.
>     There were many keys of the basic "steel Lever" or Triumph pattern
> including the ubiquitous J-38 but the exact dimensions can vary. For
> instance, long ago I bought a key which came in a Western Union New York
> Repair Shop box. It was actually made from a collection of parts that
> didn't fit very well. the lever, which you show, is just a little long
> to fit either a Bunnell or Western Electric key, i.e. the contact does
> not quite line up but works. I have no idea what kind of key it came
> from. I think there must have been at least twenty companies who made
> keys, all very much alike, but probably differing in exact details and
> dimensions. Sorry I can't be of more help but I would suggest measuring
> the distance of  the adjustment screws and the contact from the pivot
> for comparison with other keys.
>
> On 3/18/2024 12:37 PM, Donald Kemp wrote:
> > This is an arm that I can't find a key for. I've looked at online key
> > collections but I don't see a match.
> > The arm is about 3-1/8" long and 3/16" square stock.
> > The male screw for the knob is #8 and the threaded hole
> > for the contact space adjustment screw is #6.
> > The contact it staked; once on one side and 3 times on the other.
> > There is a hole between the contact and the arbor, it is not threaded.
> > It could be for a different contact placement for a bucket for a spring.
> > The arbor is 1-1/4" long
> >
> > Any idea what key this belongs to?
> >
> > --
> > 73,
> > Don, NN8B
> > "Meanwhile, with ever increasing power, the telegraph has become not
> > only the master of commerce, but the tongue of mankind." - James D.
> > Reid, 1886
> >
> > ______________________________________________________________
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> > =30=
>
> --
> Richard Knoppow
> Los Angeles
> WB6KBL
> SKCC 19998
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> =30=

-- 
73,
Don, NN8B
"Meanwhile, with ever increasing power, the telegraph has become not only
the master of commerce, but the tongue of mankind." - James D. Reid, 1886
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