The on off hand brake on my Edison Model B loosen up

[LyneisFilm]

On my Model B Fireside the on/off switch brake loosens up after it is switched on and off a few times.  It pivots on a small set screw and after a few uses, the set screw rotates with the brake lever and becomes loose.  The lever is “new” to this machine because the original was missing.  On a working machine, does the set screw provide the friction to hold the lever in position, or does the longer lever handle rest on something?

[phonogfp]

Adding a small washer should solve this problem.

 

George P.