This example of the contact toolkit shows a sphere making contact with piecewise cylindrical ribs in a pipe, where the cylinders are defined using ADAMS polylines, with a constant normal radius. The contact was defined in the AVIEW environment with macros, and normal forces, with frictional forces, calculated in a GFORCE subroutine.
This is a nice example of a simple ratchet pawl mechanism setup in ADAMS with the Virtual Model Shop Contact tool kit. It is still available, even though it is long in tooth. It is still the easist way to model these kind of contacts. if you are interested, leave a message below. 
Simple VMSI-ADAMS Gear contact
This simple example demostrates a simple 2D contact implemented with the VMSI SAC contact tool kit, which uses GFORCEs and subroutines.
Both the ratchet and pawl are represented by polylines for the contact. The VMSI SAC contact tool kit also can model a sphere to a 3d- extruded polyline.
Rahul's contribution
Rahul! … Thanks for the magnet. You get the first PMA Magnet! This magnet is from a location near Troy, Michigan.
A fitting end to an inexpensive vacation, the Pride of America takes us past the Napoli coast. Rahuls pizza magnet is next.
This is a test to see how well the camera on the iPhone works to transcribe pizza magnets.
Here is where we have come.
Rocky mountain National Park is a beautiful place.
Ok, a little Jet’s today. Actually, I picked this up a few months ago, at a used car lot, while looking for a car for my son. It’s pretty big when you see it offline. Anyway, the pizza is good, but my son didn’t get the car. Better luck next time, son!
This pizza magnet was donated staight of the wall near his cubicle. I need to post it so he can catch the phone number for the lunch takeout.