I don't know anything about windows; not even the proper terminology.

My house is 23 years old. The windows have a crank and open sideways. The
only word I can find on them is "Truth". Doing a google search, it is not
clear if that is a window manufacturer or not.
A really lousy picture of the crank is at:
http://www.frontiernet.net/~toller/crank.jpg
Apparently I don't know much about using cameras either.

One window, the one we open most of course, is broken. The crank just turns
and nothing happens. Presumably a piece of the mechanism is broken.

So, how do I go about fixing this? Is Truth a window manufacturer? Are
they still in business? How do I get parts? How do I take it apart to
install the parts?

Thanks much