They are called Adirondack chairs from upstate new york (adirondack mountains and park)
https://en.wikipedia.org/wiki/Adirondack_chair
Be it known that I, Irving Wolpin, a citizen of the United States of America, residing at Lakewood, in the county of Ocean and State of New Jersey, have invented a new, original, and ornamental Design for a Lawn-Chair or Similar Article… (IRVING WOLPIN)
https://patentimages.storage.googleapis.com/6a/6c/ef/7acea7a48e9106/USD109239.pdf