Mary's reference page seems very good for what you need. Here's more:

1) Hemostats - Hemostats are a type of forcep used to arrest the flow of blood. These instruments are clamped on the ends of cut or severed blood vessels. In surgery, hopefully, the vessels are clamped before they are severed. Hemostats are all crushing instruments.

When a vessel is surgically severed, a ligature of catgut or silk is tied beneath the clamp. The clamp is then removed. It is essential that we are all familiar with the various types of joints, jaws, curves and locks which are the distinguishing characteristics of the hemostatic forceps. They are all hinged, crushing instruments with a self- locking device on the handles which holds the instruments closed.

http://www.ww2medicine.org/surginst.html

And a picture here:

http://www.hts-cbt.com/images/29.jpg