A place for show-and-tell, wondering aloud, and wandering the trails of curiosity . . . Comments, corrrections, additional information, fresh insights, other interpretations, more images, or related observations will be welcomed!
(see previous photograph) A trade card for a bucksaw, a prime example of elegant functional design.
With the turnbuckle loosened, a fresh sawblade is attached to pegs at the bottom, then the turnbuckle is tightened; as it's tightened, the handles pivot against the curved trusses, strong in compression against each other. Simple and strong.