Re: Synchronous rotary gaps.

To: "'Tesla List'" <tesla-at-poodle.pupman-dot-com>
Subject: Re: Synchronous rotary gaps.
From: Tesla List <tesla-at-stic-dot-net>
Date: Sat, 13 Sep 1997 22:10:09 -0500
Approved: tesla-at-stic-dot-net

From: 	Robert W. Stephens[SMTP:rwstephens-at-headwaters-dot-com]
Reply To: 	rwstephens-at-headwaters-dot-com
Sent: 	Saturday, September 13, 1997 8:31 PM
To: 	Tesla List
Subject: 	Re: Synchronous rotary gaps.

> 
> From: 	Edward V. Phillips[SMTP:ed-at-alumni.caltech.edu]
> Sent: 	Friday, September 12, 1997 3:11 PM
> To: 	tesla-at-pupman-dot-com
> Subject: 	Re: Synchronous rotary gaps.
> 
> 	Most teletype machines used synchronous motors powerful
> enough to run a fairly large gap, certainly in the 7 to 10 inch
> diameter range.  Since these are now totally obselete, it should
> be possible to find large quantities of these motors dirt cheap.
> Ed
> 
Ed,

I have a teletype motor rated at 3600 RPM, 120 vac with a 3/8th's inch shaft 
size.  It has a shielded cover on the opposite end of the motor to 
the output shaft which contains a centrifugal switch.  The switch 
setting is adjustable + and - by a screwdriver adjustment. There are 
a series of holes designed to be illuminated with a strobe light for 
speed adjustment.   I believe 
this type of motor to be fairly speed synchronous but in no way phase 
synchronous which is of paramount importance in the TC application.  
I was also disappointed to discover that the motor lacked sufficient 
torque to maintain 3600 RPM on a rotary break wheel even smaller than you 
mentioned.

Perhaps the teletype motors you refer to are a different animal than 
mine?

rwstephens