1700s farm with horses

[airscapes]

Found a couple of items I would like help identifiying
First is brass or copper no threads.. thought maybe part of a gas light but google showed nothing like it.

The second item I feel like I have seen before but do not know what it is for. I a guessing it get sandwiched between 2 pieces of leather with the pin sticking out to hook a strap to ?

 

[DigPan]

Looks like a trumpet mouth piece.

 

[7centsworth]

The second is an old roof tack

 

[airscapes]

So these roof tacks, which I assume hold on the tar paper down did not have pointed ends? I have 3 of these and after the 3rd stopped picking them up as they all around the back of the barn on the surface. They are also all bent in the same fashion, now where they driven in, slap hammer type tool? Got a real name, can not fine an image on-line so far.

 

[7centsworth]

I did have an image but can't find it now. I will find it for you. I'm not sure exactly how they were used but the article told.

 

[DigDug1]

trumpet mouthpiece and roof tack!

 

[flinthunter]

The roof tacks were used on slate roofing shingles and I also agree with the musical instrument mouthpiece.

 

[airscapes]

How were they used? They are all bet approximately the same and they have no point. Not many tacks or nails have blunt flat tips. I am interested in know how these worked as they seem WAY to small to hold on slate and to blunt to be driven in to hold tar paper. It was also suggested they were used in asbestos siding which makes mire sense, just not sure how as that siding was nailed on..
I am sure these are construction related at this point, but still looking for the "How do they work" and a name that will return a similar image from google.

As far as the mouth piece , I have not talked with the home owner since I was there, but here son is a jazz musician, so at this point I am going to assume this was his or a friends and not something really old.. But will certainly show her and ask.