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 “"Lighthall's Improved Horizontal and Beam Engine," Patent Model” — 64 records examined, 43 dropped by the rights gate.
Archives queried 2026-09-02 21:29 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.![[Man Demonstrating Patent Model for Sash Window], by Unknown](/_next/image?url=https%3A%2F%2Fimages.metmuseum.org%2FCRDImages%2Fph%2Fweb-large%2FDP-32823-035.jpg&w=3840&q=75)
[Man Demonstrating Patent Model for Sash Window]
Unknown · late 1850s–60s
"Lighthall's Improved Horizontal and Beam Engine," Patent Model
Artist not stated in the record · 1838
Patent model for adjustable reclining chairs
George A. Schastey · 1873
Patent Model of a Pantographic Engraving Machine
Spencer, J. Civilian · ca 1870
Colt Model 1862 Police Revolver, serial no. 38549
Colt's Patent Fire Arms Manufacturing Company · ca. 1868
Patent Model of a Plate-printing Machine
Bogart, Albert H. · ca 1880
Pair of Forsyth Patent Third Model Sliding Primer Pistols
Alexander John Forsyth · ca. 1828
Colt Third Model Dragoon Percussion Revolver, serial no. 12406
Samuel Colt · ca. 1853
Forsyth Patent Second Model Sliding Primer Over-and-Under Pistol with Case and Accessories
Alexander John Forsyth · ca. 1824
Rank patent
Artist not stated in the record · dated 1761
Colt Model 1851 Navy Percussion Revolver, serial no. 2
Samuel Colt · 1850
Gold-inlaid Colt Model 1849 Pocket Revolver (serial no. 63306)
Samuel Colt · ca. 1853
Roger and Angelica Mounted on a Hippogriff (mouth closed, second version)
Antoine-Louis Barye · modeled ca. 1840, cast ca. 1845-1850
Cased Colt Model 1860 Army Percussion Revolver, Serial no. 7569, with Accessories
Samuel Colt · 1861
Colt Model 1855 Pocket Percussion Revolver, Serial no. 4460, with Case and Accessories
Samuel Colt · ca. 1856
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. 85 matched · 24 examined · 6 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.12 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 39579 matched · 40 examined · 37 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.3 shown
These figures describe the pass run at 2026-09-02 21:29 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.