73-75 turn signal "actuator"

[mountainmetal]

I'm working on a project that uses a '73-75(maybe more years) turn signal assembly(pic below). Two questions and maybe someone has a pic that I can't readily find.
Is this part listed only for those 3 years based on the different diameters of steering shafts thoughout the years?

I understand how the self-cancelling systems works, but is there a concentric or "lobe" that is on the steering shaft that actuates the signal off? Pic 1 is turn signal(TS) in the off position, the shaft doesn't contact anything.

Pic 2 is the TS on, assuming there is a lobe on the shaft. When it spins towards the blue arrow(counter-clockwise) the spring compresses and the TS stays on, when it turn clockwise the green lobe contacts the white plastic and turns the TS off, returning it to a neutral position.

This follows a pattern of TS on for left turn, spin the wheel left during turn and TS stays on, turn right to straighten vehicle and TS turns off.

But I can't find a pic of 1) is there a lobe on the shaft and 2) what does this signal assembly bolt to so it stays static while the shaft spinds within it. Anyone have pics?

Thanks,
-TJ

 

[pb4ugo]

The steering wheel has roll pins in it to cancel the turn signal switch.

 

[mountainmetal]

The steering wheel has roll pins in it to cancel the turn signal switch.


BOOM!! That's the answer I needed. And I'm guessing the steering column itself is bolted to the dash or firewall and is a sleeve of sorts with a face on it that the TS switch attaches to so it stays static when the shaft is turning?
Thanks for the pics, VERY helpful.

 

[pb4ugo]

I believe the ING switch bolts to the column, the the t/s switch screws the ING switch. I think there's a bearing retained in either the ING switch or column and a C clip that holds the shaft at the bearing.