OpenTwo archives, queried live.
Every record below comes from The Met or Smithsonian Open Access and was filtered on that archive’s own rights field before it reached this page. 16 shown for “Screw Propellor, Patent Model” — 44 records examined, 26 dropped by the rights gate.
Archives queried 2026-09-05 21:40 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Forsyth Patent Second Model Sliding Primer Over-and-Under Pistol with Case and Accessories
Alexander John Forsyth · ca. 1824
Screw Propeller, Patent Model
Artist not stated in the record · 1875
Watch
F. L. Meybom · ca. 1670–75
Screw Propellor, Patent Model
Artist not stated in the record · 1892
Banjo
Benjamin Bradbury · ca. 1885
English Patent Model, Screw Propellor
Artist not stated in the record · ca 1832
Watch with scenes from the story of Rebekah at the well
Johannes van Ceulen · ca. 1676–80
Ice Auger, Patent Model
Artist not stated in the record · 1873
Bramwell Valve, Patent Model
Artist not stated in the record · 1859
Collinson Manhole Cover for Boilers, Patent Model
Artist not stated in the record · 1875
Patent model for printers' quoins
Polen, George B. · ca 1876
Patent model for printers' quoins
Quail, William · ca 1874
Patent model for printers' quoins
Dorrity, Daniel · ca 1869
Ship Side Light, Patent Model
Artist not stated in the record · 1853
Thomas Redmayne's 1875 School Desk Patent Model fragment
Artist not stated in the record · 1875
Patent model for printers' quoins
Ames, Chauncey W. · ca 1873
Where these records came from.
Two archives are wired, and only two. Each one is filtered on its own rights field — never on a title match, and never on the presence of an image file.
- The Met Collection API (Open Access)Rights field:
isPublicDomain. 4 matched · 4 examined · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.4 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 41631 matched · 40 examined · 26 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.12 shown
These figures describe the pass run at 2026-09-05 21:40 UTC, during this request. A completed pass is kept for 24 hours and replayed for an identical search, which is what keeps repeated queries inside Smithsonian’s 30-requests-per-hour allowance. A pass in which either archive failed to answer is never kept — an outage must not be replayed as though it were a finding about the catalogue.
Wikimedia Commons and the Library of Congress are deliberately not wired. Wikimedia was confirmed, on a live query, to return CC-BY material inside the same result set as genuine public domain works, and filtering it safely has not been designed yet. loc.gov was blocked by bot detection during the source evaluation, so its rights vocabulary has never been observed — and nothing here is built on a field nobody has read.
An image file is a rights claim. It never travels without its field.