Any idea what these are?

[BamaBill]

Found these while searching an 1800s farm house site. There was a lot of CW activity in this area. Can anyone ID these two items? Some one suggested that the wire could be a friction primer, but as for the other I have no clue. Kind of looks like the top of spark plug, but I know that's not what it is.

 

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[stoneseeker2003]

Umm,I'd guess the spring and wire from an old screen door.
The spring(hook) was attached to the top of the door, the twisted wire(loop)hooked on to the bottom of the spring.
It ran Cati corner across the screen to where it was attached to the door, like ,midway down the door.
It's purpose was to close and keep(hopefully) the screen door closed. Usually had a tensioner,so you could adjust the"slam",lol.

http://www.oldhousejournal.net/magazine/2007/aug/screen_savers.lasso

Hardware Handbook

Screen doors are only effective if they close quickly and stay shut, and by the 1880s this reality had spawned an industry of screen-specific hardware—as practical today as it is historically appropriate.

Spring Hinges—Recommended for doors in constant use, spring hinges incorporate a coil spring mounted to the hinge pin that spreads the leaves back to the closed-door position. Spring hinges could have exposed or enclosed coils, and be made of cast iron, steel, or brass. Some models featured adjustable springs that ratchet up the tension to close doors more quickly. The only other hardware usually required with spring hinges was a pull handle and a hook-and-eye for locking.

Spring Closers—Screen doors mounted on butt hinges could still be self-closing by attaching a thin coil spring about 17" long between door top and jamb, or a shorter, heavier coil on the outside of the door.