Definitely a sickle bar mover blade/bar. I was using one and sharpening a repairing one until just 10 years ago. Normally we had two or three which could be quickly changed during the day. The triangular blades were riveted on the the bar. Your photo makes then appear to be welded which would be unusual and inconvenient.
We sharpened the blades with an angle grinder but in the day I suppose a file was used. As they wore out or broke we replace the blades, which normally had a serrated edge.

Also, there is usually a finger shaped guide between the blades.

Sickle bar mowers are still popular for small plots or area that are hard to mow with a larger mower.
As an aside they can be very dangerous as the blades are exposed and fingers, dogs legs and other objects can easily be injured.

Richard Wright in B.C.









On Jun 10, 2014, at 11:07 AM, Kenline, Brooke <[log in to unmask]> wrote:

> Hello everyone-
> 
> I need some help identifying these three mystery objects. The context is a 19th/20th c. site in Western Maryland with a grist mill, saw mill, and several house foundations.
> 
> Photos can be found here:
> https://www.flickr.com/photos/101041879@N08/sets/72157644627465467/
> 
> Object #1 is an iron alloy object and is approximately 12 cm long (see first 2 photos). It was retrieved from a context with lots of nails and other miscellaneous hardware.
> 
> Object #2 is a lead alloy object measuring 4.06 x 1.72 x 0.28 cm. It has two rivets and is crudely made (probably not an ornamental piece such as a buckle). Might be something electrical-related?
> 
> Object #3 is an iron alloy object that measures approximately 1 m in length and has 12 "teeth". The teeth are welded onto the bar, not riveted, suggesting a function that wouldn't place too much stress on them (not a saw).
> 
> Any help would be greatly appreciated! Thanks!
> 
> 
> Brooke Kenline, MA, RPA
> [log in to unmask]