[time-nuts] IBM TYpe 37 Master was Re: IBM's "Clock Corner"

Russell Rezaian rrezaian at motorola.com
Fri Jul 1 19:45:42 UTC 2011


I've actually had reason to reference this IBM resource myself recently.

Unfortunately they don't have much in the way of detail on the Type 37 Master.

I just acquired on of these Type 37 masters and I am looking for 
technical information on it.

I've found ONE reference on the NAWCC forums to someone who scanned 
the service information for it and put it on the web, but that link 
is no longer working.  Wnd while I did send an email to the person 
who had it up, I have yet to hear a reply.

I called up Simplex (who bought the IBM clock business) and the 
person I spoke to was very friendly and spent some time looking for 
older service information, but didn't have anything readily available 
for a 50 something year old clock...

So, I turn to my fellow time nuts and ask if anyone here might be able to help.

Incidentally, for those who have never heard of it, the Type 37 is a 
rather interesting clock for time nuts.

It's an electro-mechanical master clock, with a nice Invar pendulum, 
several Telechron style 60 hz synchronous motors, AND a late 50's 
vintage vacuum tube radio to receive the late 50's vintage WWV signal.

A commercially made radio controlled pendulum master clock, very nifty :)

When this was built, WWV was broadcasting out of someplace much 
further east than Colorado (Maryland if memory serves) and was 
broadcasting time signals using what I have seen described as 
"railroad morse" code rather than today's more familiar mix of 
digital and analog signals.
--
Russell



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