Mystery tool

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

No, it's not a trivet:
http://i10.tinypic.com/6x7defb.jpg

It's a tool used in the manufacture of bicycles.

I know what it's called. but only because I stumbled over the picture.

I'm still not sure exactly what the hell it does.

Here's a chance for someone to impress RBT with some really esoteric
knowledge by naming and explaining it.

Cheers,

Carl Fogel

Building wheels?

Chas.

Quoted message said:

No, it's not a trivet:
 http://i10.tinypic.com/6x7defb.jpg

It's a tool used in the manufacture of bicycles.

I know what it's called. but only because I stumbled over the picture.

I'm still not sure exactly what the hell it does.

Here's a chance for someone to impress RBT with some really esoteric
knowledge by naming and explaining it.

Cheers,

Carl Fogel

It's hard to see how big it is, and the detail of the claws is hard to
discern, but I think it is a tire mounting gizmo.

Joseph

[email hidden said:

"]No, it's not a trivet:
http://i10.tinypic.com/6x7defb.jpg

It's a tool used in the manufacture of bicycles.

I know what it's called. but only because I stumbled over the picture.

I'm still not sure exactly what the hell it does.

I can't say I'm 100% certain, and I certainly don't know the name in English. But it has a striking resemblance to a stock item in mechanical workshops before the CNC-machine became commonplace.
A direct translation from Swedish would be "division bell" and it was used for getting the spacing right when cutting gears and sprockets

Imagine a soon-to-be chainwheel blank put on the perforated plate, and the holes then used to show what material to remove, and what to leave. I imagine that'd leave you with something quite similar to those "every-2nd-link-engagement" chainwheels often found on the old bike pics you post links to every now and then.

On Dec 27, 9:40 am, dabac <dabac.329...@no-

mx.forums.cyclingforums.com said:

Quoted message said:

No, it's not a trivet:
http://i10.tinypic.com/6x7defb.jpg

Quoted message said:

It's a tool used in the manufacture of bicycles.

Quoted message said:

I know what it's called. but only because I stumbled over the picture.

Quoted message said:

I'm still not sure exactly what the hell it does.

I can't say I'm 100% certain, and I certainly don't know the name in
English. But it has a striking resemblance to a stock item in mechanical
workshops before the CNC-machine became commonplace.
A direct translation from Swedish would be "division bell" and it was
used for getting the spacing right when cutting gears and sprockets

Imagine a soon-to-be chainwheel blank put on the perforated plate, and
the holes then used to show what material to remove, and what to leave.
I imagine that'd leave you with something quite similar to those
"every-2nd-link-engagement" chainwheels often found on the old bike pics
you post links to every now and then.

--
dabac

That make sense, except that there are about 40 slots in the outside
row. Engaging every other link, that would be a huge chain ring. It
also doesn't explain the extendable arms. I'm going to guess that the
perforations are a red herring and that this has something to do with
drilling or profiling rims. Assuming that the tag off to the left is
about an inch wide, it's about the right size. The big wing nut in
the center extends the arms out evenly and the ends grip onto the
inside of a rim blank. The shaft coming in from the right is going
into a bell housing, which means that the entire assembly on the top
probably rotates. Without seeing it from different angles it's hard
to tell if it turns continuously (holding the tire side of the rim up
to a profile cutter) or has stops (for drilling holes at intervals).
From the small size of the mounting brackets on the bottom I would
lean toward drilling. I could envision something like this bolted
onto the carriage of a lathe with a spoke hole sized drill bit in the
chuck.

Quoted message said:

No, it's not a trivet:
http://i10.tinypic.com/6x7defb.jpg

It's a tool used in the manufacture of bicycles.

I know what it's called. but only because I stumbled over the picture.

I'm still not sure exactly what the hell it does.

It was once owned by the most accurate mohel in all of Queens!

Quoted message said:

On Dec 27, 9:40 am, dabac <dabac.329...@no-

mx.forums.cyclingforums.com said:

Quoted message said:

No, it's not a trivet:
http://i10.tinypic.com/6x7defb.jpg
It's a tool used in the manufacture of bicycles.
I know what it's called. but only because I stumbled over the picture.
I'm still not sure exactly what the hell it does.

I can't say I'm 100% certain, and I certainly don't know the name in
English. But it has a striking resemblance to a stock item in mechanical
workshops before the CNC-machine became commonplace.
A direct translation from Swedish would be "division bell" and it was
used for getting the spacing right when cutting gears and sprockets

Imagine a soon-to-be chainwheel blank put on the perforated plate, and
the holes then used to show what material to remove, and what to leave.
I imagine that'd leave you with something quite similar to those
"every-2nd-link-engagement" chainwheels often found on the old bike pics
you post links to every now and then.

--
dabac

That make sense, except that there are about 40 slots in the outside
row. Engaging every other link, that would be a huge chain ring. It
also doesn't explain the extendable arms. I'm going to guess that the
perforations are a red herring and that this has something to do with
drilling or profiling rims. Assuming that the tag off to the left is
about an inch wide, it's about the right size. The big wing nut in
the center extends the arms out evenly and the ends grip onto the
inside of a rim blank. The shaft coming in from the right is going
into a bell housing, which means that the entire assembly on the top
probably rotates. Without seeing it from different angles it's hard
to tell if it turns continuously (holding the tire side of the rim up
to a profile cutter) or has stops (for drilling holes at intervals).
From the small size of the mounting brackets on the bottom I would
lean toward drilling. I could envision something like this bolted
onto the carriage of a lathe with a spoke hole sized drill bit in the
chuck.

the slotted disk has 5 circles of 40, 36, 32, 28 and 24 holes which you
can presumably engage with the lever on the right. Must be a clue 😉

--
/Marten

info(apestaartje)m-gineering(punt)nl

"landotter" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Quoted message said:

No, it's not a trivet:
http://i10.tinypic.com/6x7defb.jpg

It's a tool used in the manufacture of bicycles.

I know what it's called. but only because I stumbled over the picture.

I'm still not sure exactly what the hell it does.

It was once owned by the most accurate mohel in all of Queens!

I said "bris" not "Swiss"..... ;-)

Chas.

M-gineering said:

Quoted message said:

On Dec 27, 9:40 am, dabac <dabac.329...@no-

mx.forums.cyclingforums.com said:

[email hidden] Wrote:

Quoted message said:

Quoted message said:

> No, it's not a trivet:
>http://i10.tinypic.com/6x7defb.jpg
> It's a tool used in the manufacture of bicycles.
> I know what it's called. but only because I stumbled over the picture.
> I'm still not sure exactly what the hell it does.
I can't say I'm 100% certain, and I certainly don't know the name in
English. But it has a striking resemblance to a stock item in mechanical
workshops before the CNC-machine became commonplace.
A direct translation from Swedish would be "division bell" and it was
used for getting the spacing right when cutting gears and sprockets

Quoted message said:

Quoted message said:

Imagine a soon-to-be chainwheel blank put on the perforated plate, and
the holes then used to show what material to remove, and what to leave.
I imagine that'd leave you with something quite similar to those
"every-2nd-link-engagement" chainwheels often found on the old bike pics
you post links to every now and then.

Quoted message said:

Quoted message said:

--
dabac

Quoted message said:

That make sense, except that there are about 40 slots in the outside
row.  Engaging every other link, that would be a huge chain ring.  It
also doesn't explain the extendable arms.  I'm going to guess that the
perforations are a red herring and that this has something to do with
drilling or profiling rims.  Assuming that the tag off to the left is
about an inch wide, it's about the right size.  The big wing nut in
the center extends the arms out evenly and the ends grip onto the
inside of a rim blank.  The shaft coming in from the right is going
into a bell housing, which means that the entire assembly on the top
probably rotates.  Without seeing it from different angles it's hard
to tell if it turns continuously (holding the tire side of the rim up
to a profile cutter) or has stops (for drilling holes at intervals).
From the small size of the mounting brackets on the bottom I would
lean toward drilling.  I could envision something like this bolted
onto the carriage of a lathe with a spoke hole sized drill bit in the
chuck.

the slotted disk has 5 circles of 40, 36, 32, 28 and 24 holes which you
can presumably engage with the lever on the right. Must be a clue 😉

--
/Marten

info(apestaartje)m-gineering(punt)nl

Does it punch or drill? Is it self-contained/complete?

Joseph

* * Chas said:

"landotter" <[email hidden]> wrote in message

news:[email hidden]...

Quoted message said:

Quoted message said:

No, it's not a trivet:
http://i10.tinypic.com/6x7defb.jpg

Quoted message said:

Quoted message said:

It's a tool used in the manufacture of bicycles.

Quoted message said:

Quoted message said:

I know what it's called. but only because I stumbled over the picture.

Quoted message said:

Quoted message said:

I'm still not sure exactly what the hell it does.

Quoted message said:

It was once owned by the most accurate mohel in all of Queens!

I said "bris" not "Swiss"..... ;-)

http://tinyurl.com/2e2jf9

M-gineering said:

the slotted disk has 5 circles of 40, 36, 32, 28 and 24 holes which you
can presumably engage with the lever on the right. Must be a clue 😉

--
/Marten

I agree. It's a device for drilling spoke holes in blank rims. I
remember seeing one in the back warehouse at Euro-Asia Imports when I
worked there. I bet it's still there- the Hansing family are
packrats.

Jeff

JeffWills said:

M-gineering said:

the slotted disk has 5 circles of 40, 36, 32, 28 and 24 holes which you
can presumably engage with the lever on the right. Must be a clue 😉

--
/Marten

I agree. It's a device for drilling spoke holes in blank rims. I
remember seeing one in the back warehouse at Euro-Asia Imports when I
worked there. I bet it's still there- the Hansing family are
packrats.

Jeff

Dear Jeff,

I'd say that you and others up-thread have nailed it:

"Early tool 'New England Cycle Supply Co., Keene N.H.', cast iron
index rim boring tool."

http://www.auctionflex.com/showlot.ap?co=9768&weventid=1053&weventitemid=441666&wmaingroupid=0&wcatmastid=0&inventorytype=&minyear=1990&minmonth=1&minday=1&maxyear=2050&maxmonth=12&maxday=31&keyword=&lotsortorder=timeleftasc&pagenum=4&action=

It sold at auction for $450.

I'm not sure what you turn to clamp the tool into a rim and what you
turn to bore the spoke hole (or multiple holes). I'm not even sure if
the drill bit (or bits) is included in the picture. Maybe the damn
thing just marked the drilling points.

The four arms might anchor the tool while the operator bored one hole
at a time with the fifth arm.

Or maybe the fifth arm anchored the tool inside the rim while the
operator bored four holes simultaneously at the compass points.

But boring four holes at once would take a lot of effort, and a
single-arm anchor would seem to be less certain.

As Marten hinted, the 4x number of holes in the concentric circles
shows how 4x spoke counts were popular.

The 4x tool would be confused by this Rover's 30-spoke front wheel:
http://www.tampere.fi/kuvat/5nNEFdmqB/velo_19.jpg

I don't know if the tool is for boring holes in metal rims, wooden
rims, or both. Hand-drilling thick wooden rims sounds like a lot of
work to me, but early steel rims sound even worse.

Cheers,

Carl Fogel