[GreenKeys] Pics of M15 Platen knob and/or crank / keytop question

Thu Sep 24 21:58:54 EDT 2015

Jim we  have    shaft  with knob  for   15
knob is Bakelite?
ed at the  stash at  smecc

In a message dated 9/24/2015 5:04:49 P.M. US Mountain Standard Time,  
62.5milliamps at gmail.com writes:

Jim, et  all

I had a platen knob for a M15 here at one time.  It was  offered as an  
option, as was the hand wheel.
I have a book of M15  drawings and one of them has a drawing and part  
number for the  knob.
I know Pat Burg in northern Wisconsin who is a member of the  national  
club for typewriter collectors.
I will write and ask if  she knows of any typewriters with the spring  
loaded key  caps.

Don
K9TTY

On 24 Sep 2015, at 6:13 PM, Jim Haynes  wrote:

I don't know about platen knobs.  That is what is shown on  the patent
drawing, but I don't know if the knob shown in the parts book  works
with the standard M15 cover.  Then not in the parts book but  there is
also a handwheel or two, used with the "post office" style of  cabinets,
one by W.U. and one by Teletype.  The handwheel sticks up  through a slot
in the top of the cover.  One advantage of this is that  the machines can
be put flush side by side without having to leave gaps in  between for
the paper handles.

Spring cushion keytops are most  common, and can be recognized by the
green color and the fact that they are  springy to the touch.  I think
they were made by some third party and  were made for typewriters as
well as Teletype.  The celluloid keytops  are like old typewriters
used, and seem to have been preferred by Western  Union.  They are
usually white background and black letters and maybe  red for the FIGS
case characters; or some are black background with white  letters.

I believe either style can be used on the same key  levers.

There was once a third style called pneumatic keytops, but I've  never
encountered those.  I assume they were air cushioned rather  than
spring cushioned.

I've never seen a typewriter with spring  cushion keytops, so maybe the
company was not very successful in selling  them to anyone but Teletype.
I spoze one could go to a typewriter  collecting museum or web site to
learn  more.
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