Older Than deck / Inventions and everyday things
Revolving door
Designed by Van Kannel
1888
Theophilus Van Kannel’s three-section door kept out draughts.
Sources and checks
Checked 2026-11-01: Researched by Codex (two independent publishers, verbatim quotes); every counted quote re-found on its page by the server check (content-verify, or content-verify-pdf for PDFs); scope and plausibility reviewed by Claude (AI build agent). Quotes are short passages from each source; for dates the quote is the year as printed, read in context.
“1888”National Inventors Hall of Fame: source, retrieved 2026-10-27; quote re-found by the server check
“1888”Cornell University — Intypes research project: source, retrieved 2026-10-27; quote re-found by the server check
Spotted a mistake? Tell us; a correction gets a new revision.