[TheForge] Conestoga wagon jack

[dann at wctatel.net]

I remember seeing an antique  wagon jack that essentially looked like a
half moon with an offset handle in the manner of an eccentric (with a long
heavy wooden handle).  No gears were involved.

Or.. is

Jack is a donkey with a Spring woody?

Dann

> Sorry, it's spring and i couldn't help it.
>
> wmullett at bright.net wrote:
>> No - I don't see how it could have been used for something like that.
>> The hole is through the side in the wood.
>>
>> In Plummer's book, they show 5 different jacks and none seem to have a
>> spring like you describe.
>>
>> ---- Original message ----
>>> Date: Mon, 23 Mar 2009 14:12:07 -0700
>>> From: theforge-bounces at mailman.qth.net (on behalf of Peter Fels &
>>> Phoebe Palmer <artgawk at thegrid.net>)
>>> Subject: Re: [TheForge] Conestoga wagon jack
>>> To: Blacksmithing List Sponsored by ABANA <theforge at mailman.qth.net>
>>>
>>> Walt...was the hole used to anchor a wound spring? Common on later
>>> mechanical jacks..pf
>>>
>>> wmullett at bright.net wrote:
>>>> I've been given the opportunity to make a new ratchet gear for a
>>>> Conestoga wagon jack.  The owner has two - the one with the missing
>>>> ratchet is dated 1787 and the other one he gave me to use as a pattern
>>>> is dated 1819.
>>>>
>>>> The 1819 one has a 1/8" hole on the gear side - not sure why - but
>>>> through that I was able to determine the gearing.  The crank has a 4
>>>> tooth gear engaging another gear that lays just beneath the face plate
>>>> and it has 18 teeth.  On the same shaft, is a gear with 3 teeth that
>>>> engages the rack.  Thus the mechanical advantage is 6 to 1.
>>>>
>>>> Looking at these two and the 5 shown in Plummer's "Sorber Collection",
>>>> I wonder if the gears were bought?  None of the shafts run front to
>>>> back so there has to be a separate box inside.
>>>>
>>>> Does anyone on-line know any more about these?
>>>>
>>>> Walt - Ohio
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