[GreenKeys] M15 Margin-Bell Pawl Spring (82999?)

[Paul Wills (CKT&T)]

According to Teletype Bulletin 1037B, 82999 should be the part.  I have 
one here if you need it.

PDW

On 1/29/2021 9:20 AM, Paul Birkel wrote:
>
> Well, mine has gone AWOL.  There’s a twisted stub still attached to 
> the pawl itself, but that’s it.
>
> In TM11-2215 
> (tm11-2215-teletypewriter-tt5-model-15-20pct-of600dpi-main.pdf) the 
> Margin-Bell Pawl Spring is clearly specified in Section 236 and Figure 
> 203 (pp. 231-232) however it does not appear to be listed in the 
> section on Parts Identification.  So I’m stumped as to the proper part #.
>
> It should be a pretty stiff spring; a pull of 1/2 to 1 1/2 ounces is 
> recommended, so not an especially critical tension.
>
> In 1110B_Model15_Parts_Dec43_ArmyVer.pdf on page 10 it appears to be 
> part # 82999 “Spring”, listed immediately above  # 74378 “Margin Bell 
> Pawl” on the left-hand side of the illustration.  Only the “Margin 
> Bell Pawl” is listed in the index, but I’m pretty sure that I’ve 
> correctly identified the missing spring in that illustration.
>
> My confusion arises when I search for that part # back in TM11-2215 
> where it appears (only) in the illustration for the RIBBON OSCILLATOR 
> (Figure 323, page 354).  There is a corresponding identification entry 
> for “4T82999” on page 336 (the spring section of Miscellaneous Parts) 
> described as “SPRING: extension; .010" dia music wire; 17/32" lg x 
> 9/32” dia overall”.  The function of the part is left unspecified, 
> although many other springs listed there do include this information.  
> There are no springs listed there corresponding to figure 203.  But at 
> least the stated dimensions seem about right.
>
> Should I expect to see these sorts of inconsistencies/incompletenesses 
> between these two documents?  Am I looking in the wrong documents?  Is 
> thus an example of a “generic” spring with multiple uses?  Is the 
> correct part 3 “82999” or “4T82999” or something else entirely :->?
>
> Does anyone have one of these?  Or should I go directly to Mr RTTY and 
> throw myself on his good graces :->?
>
> Thank you for your advice.  I’m still learning-the-ropes, yes.  So 
> many questions!
>
> paul
>