[GreenKeys] Interesting 8-level Reader

[COURYHOUSE at aol.com]

BELL AND HOWELL EVEN OWNED  DEVRY SCHOOL AT ONE TIME!  ED#
 
 
In a message dated 9/1/2013 8:08:33 P.M. US Mountain Standard Time,  
62.5milliamps at gmail.com writes:

Makes  one wonder why Bell & Howell would be into this.

Don


On  1 Sep 2013, at 8:30 PM, Cory Heisterkamp wrote:

It's a physically  contacting system, but rather interesting. Star- 
shaped 'feelers' ride on  independent arms in the head- when there's a  
hole present, a leg of  the star drops through, when there's not, the  
star rides up and the  contact opens.  This way they can read a hole  
with the tape  moving forward or back. These stars spin about an axis  
and I assume  they fall into line pretty quick with a few nulls punched  
in the  header.

-Cory

On Aug 31, 2013, at 12:34 PM, Don Robert  House  
<62.5milliamps at gmail.com> wrote:

> Interesting  that you mention "shed some light."
> Does the device use lamps and  photocells?
> What does the reading mechanism look like.
>
>  Don
> K9TTY
>
>
> On 30 Aug 2013, at 5:46 PM, Cory  Heisterkamp wrote:
>
> Thought you guys might get a kick out of  this, and maybe someone can  
> shed some light on its purpose. I  picked it up since it's a  
> mechanical stepper and has physical  contacts. There's a sticker on  
> the side marked "Bell &  Howell" and it appears to be made by Tally.  
> Now here's the neat  thing, there's a 'tape out' sensing switch on  
> BOTH sides of the  reader head AND a differential with two solenoid  
> releases that  allows you to step the tape both forward AND backward.  
> Pretty  cool!  -Cory
> < 
> IMG_6207 
> .JPG 
> >  
> < 
> IMG_6205 
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