ronnie barker,
Here's a
nice photo of a UH-60 MRGB that shows the LH bevel drive, tail rotor drive, swash plate, mast, rotor hub, and housing.
The patent drawings that plt_aeroeng linked to are not for the UH-60. The UH-60 xmsn is similar in layout, but the final gear stage is not a stacked planetary. Here's a diagram of the
UH-60 geartrain final stages.
Hope that helps.
riff_raff