I may have grown up on a farm/ranch but I guess I'm not as old as you 'geezers' half the stuff y'all have pics of I couldn't begin to tell ya what the heck it is or it's use!My guess on the wrench was way wrong..
I did notice the 'yoke' in the background of your 'iron maiden' pic...used to keep calves or cows from putting their heads through fences and getting out of the pasture.....or anyother place you don't want them sticking their head into!