I can at least give you what my G>E technical dictionary says (images attached). I don't think I can really verify this so well without a diagram, so CL 1. I did find a hit for something that is possibly a similar device (mechanically speaking) and linked it (this is for the first of my three proposals).

So again, CL 1, but it's something!




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Note added at 54 mins (2020-06-01 22:42:39 GMT)
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Also, in the dictionary, tra = Transport, Verkehr, Automobilwesen, Schiffahrt

3409 équerre f de renvoi - Winkelhebel m – bell-crank
9424 tringle f d’écartement des lames d’aiguille – Zungenverbindungsstange f, Weichenstellstange f, Weichenzugstange f – point stretcher; stretcher rod
(UIC, Lexique général des termes forroviares)

A points lever, ground throw, or switchstand is a lever and accompanying linkages that are used to align the points of a switch manually.
:
An example of a mechanism used at a switch. The two points are linked together with a throw bar. The throw bar extends to the lever on the near side of the track, which is used to throw the switch.
https://en.wikipedia.org/wiki/Railroad_switch#Classification

Movement of the points may be initiated manually, mechanically, or electrically by means of a throw bar on both the real railroads as well as on their modeled counterparts.
:
And, of course, there is the necessary linkage that connect the throw bar and its movable points to a switch stand (hand-operated), or to mechanical or electrically controlled mechanisms some distance away so the turnout can actually be positioned for one route or the other.
https://books.google.de/books?id=6hNjDwAAQBAJ&pg=PT100&lpg=P...

You can see here the flexibility of the parts, with the different adjustments to length and throw at the bell crank.
The Walthers machine has a transverse brass throw bar, which moves back and forth horizontally in the photo above, and the bar has a hole in each end.
http://modelingthesp.blogspot.com/2012/05/using-model-aircra...

Withdrawal of legacy RailCorps signalling equipment manuals
This technical note is issued by the asset Standards Authority (ASA) to notify that the following legacy RailCorp signalling equipment manuals have been withdrawn:
• TMG E1290 Mounting Instruction for VAE Spring Box with 2 Bell Crank, version 2
:
Fig. 2.1
Main Components or Throw and Lock Mechanism

2.1 General Description
The Westinghouse Brake & Signal Co. "M70" MK III point machine is similar in design to the McKenzie and Holland Style 'M' machines …
The main crank drives the throw bar and the slide bar to which the lock box is attached. The lock slides engage the lock box to positively lock the mechanism.
https://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd...
(Bitte auch die Abbildungen betrachten)