[Tall-Corn] rotomatic rule

[Mick]

I have a couple recommendations for anyone having them made, or even if 
buying them from General Machine.

1. Have the extension rods made out of 3/8" round aluminum bar stock. The 
aluminum round stock can be purchased in a strong enough alloy to work just 
as good as steel and are a lot lighter in weight.

2. Thread the connections with 10-24 threads to use this size set screws for 
the connections. If I remember correctly, either the Rotamatic or the click 
rule  used 10-32 threads originally. It is advantageous to have them all the 
same size so that extension bars can be used with both measuring devices. It 
is easy to retap the 10-32 thread to the 10-24 size, but not the other way 
around.

3. If you are serious at using either the Rotamatic, or Click rule, it is 
advantageous to have 2 or more 36" long extension bars. I have used them 
linked together for over 12 feet. You do have to handle it carefully at 
these very long lenghts.

A general note-

I know some places are telling the blind that Braille rules, tape measures, 
and talking tape measures work just fine. I do not agree in any way. These 
devices are good for gross inaccurate measuring and estimates, but are not 
nearly accurate for good measuring by the blind. The Clickrule is faster to 
use than the Rotamatic, but is less accurate and because of the size and 
shape of the measuring head, it poses difficulties with some kinds of 
measuring.

-----Original Message----- 
From: Richard via Tall-Corn
Sent: Monday, August 30, 2021 8:11 AM
To: tall-corn at nfbnet.org
Cc: Richard
Subject: Re: [Tall-Corn] rotomatic rule


Hi folks,

Some good ideas generated in this thread so far.  Glad i posted the
original.

Here's my basic plan.

A very close friend is a retired toolmaker/machinist who has a well
equipped machine shop at his disposal.
No, he's not interested in doing a run of units, but I'm going to borrow
one from a local friend, let him have a closer look as he repairs the
man's 6 inch extension's male connection, and fabricate me a set.

IN doing so he'll be able to do the drawings and create specifications in
a form which will be presentable to any machine shop that might have an
interest in doing this work.  HE has the equipment to fabricate one right
there at home, and the knowledge to communicate with professionals.

Other ideas and courses of action proposed in this thread are very much
worth pursuing as well.  Thanks folks!

Regards,

Richard Webb



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