[GreenKeys] Not a Model 14

[Larry Tighe]

Hi Don,

Thanks for the offer....I do have a copy coming from Tom.

This is a "UA Model 14 Keyboard Perforator" made by Teletype 
Corp.....(1936).

When you press a key, a comb arranges for the correct pins to ram a hole 
into the paper...every key operates contacts that cause the solenoid to slam 
the appropriate pins while a key is held down.

It also has a rachet that counts the letters and turns on a lite under the 
KB ! !   I suspect that the 130 VDC might take up to a 1 ampere draw to move 
this solenoid.

Rice sez the Model 19 used a similar perforator and a large P.S. to supply 
the 130 VDC.

I'm going to build a transformer driven bridge to supply the 130 VDC.

lar
----- Original Message ----- 
From: "Don Robert House" <k9tty at dls.net>
To: "Larry Tighe" <larryradio at worldnet.att.net>
Cc: "Jim Swanberg" <riceguy at peoplepc.com>; "George Hutchison" 
<w7tty at readysetsurf.com>; "Jack Hart" <wa2hwj at worldnet.att.net>; "Jim 
Haynes" <jhhaynes at earthlink.net>
Sent: Friday, May 02, 2008 19:45
Subject: Re: [GreenKeys] Not a Model 14


> Larry,
>
> It is not a Model 14.
>
> I have the manuals for it.  I will try to scan them tonight.  It has  it's 
> own Model designation in the Bell System of "Special Perforator  15M."  It 
> is also known as the "Iron Horse"
> The regular model (not for the Bell System) is just called a "Five  Unit 
> Perforator."  I also have a matching solenoid operated reader if  you want 
> it, it is yours.
> Most Teletype equipment is designed to work on -130vdc on a 62.5  milliamp 
> loop.
>
> I have an extra 130 volt WECO supply for you.  You need a 1000 Ohm 
> ceramic resistor in series with a 2500 Ohm Rheostat to adjust for the 
> 62.5 mils.
>
> I can help you with that as well.  I would need some funds for  shipping. 
> The supply is very heavy.
>
> Don
>
>
> On 2 May 2008, at 6:11 PM, Larry Tighe wrote:
>
> Howdy Folks,
> I have the Model 14 perforator all lubed and ready to go BUT,
> the label sez, 130 volts and max of 1 ampere.
>
> This is solenoid driven.  When you press a key, a 2 coil solenoid  slams a 
> plunger into the pins that cut the holes in the paper tape.... 1936 
> vintage machine....no motor...just a solenoid.
>
> Am I correct in assuming it is requiring 130 volts DC?  If so, where  did 
> they get that voltage in those days (assuming it wasn't Edison's  DC in 
> NYC) Was it one of the old rectifiers?  The coils measure 150  ohms across 
> the power supply line.
>
> Thanks for any input
> lar
>
> Larry
> www.antiquetelephone.com
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