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. 15 shown for “William Mont Storm Engine, Patent Model” — 43 records examined, 24 dropped by the rights gate.
Archives queried 2026-09-05 23:49 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Pair of Forsyth Patent Third Model Sliding Primer Pistols
Alexander John Forsyth · ca. 1828
William Mont Storm Engine, Patent Model
Artist not stated in the record · 1865
The Jabach Family
Charles Le Brun · ca. 1660
Colwell Disulphide of Carbon Generator and Engine, Patent Model
Artist not stated in the record · 1879
Forsyth Patent Second Model Sliding Primer Over-and-Under Pistol with Case and Accessories
Alexander John Forsyth · ca. 1824
Fiske Oscillating Engine, Patent Model
Artist not stated in the record · 1880
Giffard-Sellers Injector, Patent Model
Artist not stated in the record · 1860
Baker and Baldwin Rotary Steam Engine, Patent Model
Artist not stated in the record · 1839
"Lighthall's Improved Horizontal and Beam Engine," Patent Model
Artist not stated in the record · 1838
Otto and Crossley Gas Engine, Patent Model
Artist not stated in the record · 1877
Lighthall Half-Beam Marine Engine, Patent Model
Artist not stated in the record · 1849
Judson and Cogswell Governor, Patent Model
Artist not stated in the record · 1875
Bramwell Valve, Patent Model
Artist not stated in the record · 1859
Doble Water Wheel, Patent Model
Artist not stated in the record · 1899
Johnston Air Compressor, Patent Model
Artist not stated in the record · 1879
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. 3 matched · 3 examined · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.3 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 361233 matched · 40 examined · 24 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 23:49 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.