[GreenKeys] platten shaft pin, and Model 15 history

Sat Apr 3 22:36:02 EDT 2021

Fantastic article, Jim. So that makes it really special when there was a run a year or so ago on the autostart channel of the salt girl in RTTYArt.

Paul
W2TTY

ITTY: 		HTTP://INTERNET-TTY.NET:8000/ITTY
AUTOSTART: HTTP://INTERNET-TTY.NET:8030/AUTOSTART
EUROPE: 	HTTP://INTERNET-TTY.NET:8040/EUROPE

> On Apr 3, 2021, at 8:02 PM, Jim Haynes <jhhaynes at earthlink.net> wrote:
> 
> Well, looking at the parts book there is a note in section IV
> 
> "The 74264 platen shaft has been redesigned, but retains its
> original number.  The new design differs from the old design in that
> it has a hole near the left end for a 104995 pin instead of a
> tapped hole for the 80255 screw.  The 80255 screw, however, is
> still available for maintenance purposes on the old style shafts."
> And the numerical index shows that 80255 is a 4-40 x 21/64 fillister
> head screw.  Then the page in the parts book showing the platen
> shaft shows the platen shaft to be part number 74264, shaft, platen,
> (with 104995 pin).  So that suggests that if you have to replace
> the platen shaft you get one with the pin installed, but if you
> have a broken pin then perhaps you can drive it out and replace
> with a new 104995 part.  And suggests that if you have to replace
> the platen shaft you don't have to recover the 104995 pin from the
> old one and put it into the new one, because the new one will come
> with the pin already in there.
> 
> Since you can't order a 104995 pin anymore I guess you should drill
> and tap the hole for 4-40 and fabricate an approximation of the 80255 screw.  And, yes, the purpose of the screw or pin is to engage with
> the platen crank.
> 
> Things I've never thought about - there is just one part number for each
> of the platen brackets, but we know they were made at one time of cast
> iron and at another time of aluminum.  If one of them breaks I wonder
> if you might have to replace both so they are made of the same material.
> I see there are different springs used, depending on the material.
> 
> The patent for most of Model 15 machine is 1,904,164 issued on April
> 18, 1933 to Sterling Morton, Howard Krum, and Edward Kleinschmidt.
> (pat2pdf.org is an easy way to download a copy of a patent)  We know
> that Edward Kleinschmidt was a brilliant inventor, Howard Krum was
> an engineering graduate of Armour Institute (now Illinois Institute
> of Technology), but Sterling Morton was from the Morton Salt family
> and no doubt was president of Teletype because of the Morton family's
> investments in the company.  He was educated at Princeton, which
> kindly supplied me with a summary of his course work.
> 
> "Morton began his studies working towards a Bachelor of Science degree (B.S.)
> in the John C. Green School of Science.  However, it seems that between his
> junior and senior year, he switched to the Academic Department where he
> focused on the study of modern languages, specifically French, English and
> Spanish.  He graduated with a Bachelor of Letters degree (Litt.B.).
> 
> Freshman year 1902/1903:
> Fall semester: Algebra, Trigonometry, General Chemistry, English, Hygiene,
> French and German.
> Spring semester: Algebra, English, General Chemistry, French, Plane and
> Spherical Trigonometry.
> 
> Sophomore year 1903/1904:
> Fall semester: Analytical Geometry of the Conic Sections, English, French,
> Biology, Mineralogy.
> Spring semester: Physics, Logic, French, English, Chemistry-Qualitative
> Analysis "Th." and "Pr." (possibly theory and practice?).
> 
> Junior year 1904/1905:
> Fall semester: Jurisprudence, Eng. Phil. 33, French, Theo. Chem.
> Spring semester: Constitutional Government, Physical Geography, Spanish and
> English Literature.
> 
> Department listed as "Romanic"
> 
> Senior year 1905/1906:
> Fall semester: French H1, English 43, American History 43, Spanish.
> 
> Spring semester: French Literature 42, English 44, Spanish 48, French
> Seminar.
> 
> According to the 1906 grade book on page 261, Morton graduated with 'Honors in modern languages, cum laude.'"
> 
> So we see he was quite a scholar in addition to being a business man and inventor.  After working out the sale of Teletype to AT&T he went to work at the family salt business, ultimately becoming Chairman of the Board. He was, incidentally,the one behind the Morton imagery of the girl with an umbrella and the slogan "when it rains it pours".
> 
>    ---
> 
>    "Ya can argue all ya wanna, but it's dif'rent than it was."
>    "No it ain't! No it ain't!  But ya gotta know the territory."
>        Meredith Willson, The Music Man
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