I usually pick up trash too when point hunting and ended up with these. I've seen these before and ignored them. I'm almost sure they are just "tractor trash" of some sort.
A favorite Native American ornament for the past three centuries is a sheet metal trapezoid, rolled into a cone, and attached to knifesheaths, pouches moccasins, or other clothing (Beauchamp 1903). These ornaments are commonly referred to as tinkling cones. In the northeast, tinkling cones were often attatched to leather bags ornamented with embroidery of dyed porcupine quills (Quimby 966). Brass tinkling cones from the 1600’s are even found among the Archaeological Collections of State of Connecticut. Tufts of dyed deer or other fur or feathers were often inserted into metal tinkling cones. In New Netherland in 1650 Native Americans "have long deer's hair which is dyed red, and of which they make rings for the head, and other fine hair of the same color to hang from the neck like tresses, of which they are very proud" (Anonymous 1967).
They also made them out of other types of metal, such as brass or bronze when it was available. There are generally a large number of them in a small area; at least that has been the case in my experience.
Cool find! I knew what they were, and have never been able to find one, even though they were being used by people in that area in historic times. I have some modern ones, as they're still being made and in use today. (Yours are the old ones, though.)
If not for this forum I woulda scrapped them. Pretty sure these are copper. I have taken my detector with before but not to that particular field. I've tossed several of these cones down in years past.
I'm thinking they are cone arrow points. Saw a few illustrations in some of my NA bow/arrow reference books (e.g., The Encyclopedia of Native American Bows, Arrows and Quivers). I'm attaching an image from the internet.
The points tend to have a tip to them like the ones above and a tinkler will not have the pointed end an most of the time will be flat on the end. nice finds JMO they are tinklers.
In my part of the country they didn't have the cone arrow points. That would be a pre-contact thing probably, where copper was available, and easily obtained. It would be rolled into a cone because a flat copper arrowhead wouldn't get the job done, I guess. Spiro had copper available from trade, but I haven't seen any arrow points made from it. Copper was pretty valuable in that part of the country, so they probably didn't use it for everyday items. Generally the historic tinklers I've seen have the tips cut off and are made of tin. Today, they make those out of those metal lids from Copenhagen snuff cans. Cool to see these posted.