The new photo (thanks for your efforts, John) enables me to recognize the object for what it actually is. Misipirelichtr was correct, the object is a "wick holder for an early lamp." (That's a quote from his post in this discussion.) Specifically, it is a dual-wick holder, from a type of whale-oil lamp invented by Benjamin Franklin. See the images below. The brass "dual plug wick" lamp in the photo is from the 1850s, which matches up with the time-frame of the Schenkl shell that the "fuze" was found next to.
Edit note: I modified this post only to correct my mis-typing of Misipirelichtr's name.
Regards,
Pete