[GreenKeys] Print Hammer Heads

[Nick England]

This one. Many many thanks for tackling this George.

 173979 specs
federal stock no 5815-00-084-5008
Overall height - 0.141 inches nominal
Overall length - 0.391 inches nominal
Overall width - 0.250 inches nominal
Material - Plastic
Special features - One slot, 0.047 in. w by 0.188 in. lg

On Sunday, December 6, 2015, Geo. Hutchison <w7tty at centurylink.net> wrote:

> ALL - - -
>
> Methinks I should clarify the nature of the print hammer heads.
>
> The model 32/33 typewheel hammer covers issue was settled over a year ago.
>
> The items I am working on preparing are the TTY P/N 173979 HEAD - as
> indicated in a TTY Corp S.O.P. P/N 176138 Mod Kit for the model 28/35
> perforator and reperforator. In this kit the fourth of six components
> listed on the list on the part packaging envelope.
>
> These are the cushioned heads that deliver the whack to the tape - thru
> the ribbon- and to the selected character on the surface of the type wheel,
> creating a darkened image of the selected character on the surface of the
> tape being prepared.
>
> Please note that the character printed is six character spaces ahead of
> the actual character being perforated by the punch mechanism.
>
> Some mechanisms print the character on the tape feed wheel perforations,
> and others imprint the character on the inboard/ upper edge of the tape.
>
> Please examine your machines closely. Any characters printed in sanskrit
> are in most cases probably bogus.
>
> W7TTY
>
>

-- 
Nick England K4NYW
www.navy-radio.com
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