We usually refer to your first one as a coat tail weight. They were also used on curtains. They can go back to before the civil war. Your second item looks to be a ladies broach. Don't know about the last item.
We usually refer to your first one as a coat tail weight. They were also used on curtains. They can go back to before the civil war. Your second item looks to be a ladies broach. Don't know about the last item.