Remind me what the name of this simple block is, please.
 

I've forgotten the name of this simple triangle square block, and where to identify blocks. Thanks, gang

I call it "Broken Dishes" but it has other names.

I was thinking hour glass.

i'd go with hourglass

i've always known it as hourglass

Is it also called a quarter square triangle? Sure I've seen that somewhere.

A single one is an hourglass. Put together like that, it's Broken Dishes. They are made of quarter square triangles. Everybody's right!

I've just finished making "lots" of those blocks for the 2017 Bonnie Hunter Mystery quilt and she calls them "hour glass".

It looks like 4 small "hour glass" blocks put together in different directions.

A single unit is an hour-glass made with quarter squares. When they are set together as in your picture they are known as broken dishes. There may also be other names as many blocks have several names.