Shock tyers from the collection of Joe Isler. Tyers were used to tighten the rope when shocking wheat or corn. Commonly used from 1900-1940, the devices came in countless sizes and configurations, and ran the gamut from homemade to manufactured. One even resembled a short ladder with a ratchet attached, designed for use by children. “The ladder made it easier for them to reach the shock so they could tie it,” Joe says.