Just like the ones in a steam driven ship’s reduction gearbox. I remember studying about that stuff for one of my Coast Guard exams. Got a Steam and Auxillary endorsement for passing that section of the test. Those days of shipping are long gone though.
I think those are “Herringbone Gears”, sometimes called “Chevron Gears”.
The inscription that accompanied the pictures called them “Double Helix” Gears..
OK, I see that Herringbone Gears are a *Specific Type Of Double Helical Gears”.
So we’re both correct!
https://en.wikipedia.org/wiki/Herringbone_gear
Yannow, you really have to sit in absolute awe of the men who came up with things like these in the first place. Now THOSE were engineers.
and the machinery to build it.
The Solution to backlash!
Not quite as cool as “Squirm gears” (LOOK IT UP!) but neat nonetheless!!
These were invented by André Citroen, hence the inverted double V on the car badge.
Just like the ones in a steam driven ship’s reduction gearbox. I remember studying about that stuff for one of my Coast Guard exams. Got a Steam and Auxillary endorsement for passing that section of the test. Those days of shipping are long gone though.