{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp12_substrate_denial72_20260805","research_id":"eoa_inverse_innovation_exp12_light_screen_20260805","cell_id":"context_keyed_representation_switching__computer_science","search_lanes":{"direct_problem_and_intervention":{"queries":["bed of nails test fixture interchangeable cassette PCB revisions keyed","patent interchangeable test fixture cartridge keyed PCB wrong fixture interlock"],"source_ids":["SRC1","SRC2"],"no_result_note":null},"synonyms_and_historical_terms":{"queries":["ICT test fixture interchangeable interface plate removable personality board","universal test fixture interchangeable wired personalizers","electronic test fixture demountable cassette characterising hole interlock"],"source_ids":["SRC1","SRC3"],"no_result_note":null},"products_practices_and_standards":{"queries":["exchangeable test fixture cartridges single fixture base multiple PCBAs","reusable mechanical bed-of-nails fixture interchangeable interface module","exchangeable cassette test fixture lid safety interlock"],"source_ids":["SRC2","SRC3","SRC4"],"no_result_note":null},"component_combination":{"queries":["PCB test fixture fixed printed circuit interface conductive traces manual wire replacement","test fixture wrong board characterising hole interlock contact-testing board","passive routing PCB interchangeable cartridge precision guide pins"],"source_ids":["SRC1","SRC2","SRC3","SRC4"],"no_result_note":null}},"sources":[{"source_id":"SRC1","title":"Electronic test fixture (U.S. Patent 4,797,610)","publisher":"Justia Patents","url":"https://patents.justia.com/patent/4797610","source_type":"OTHER","claims_supported":["A 1989 circuit-board test fixture uses a separately demountable, readily interchangeable cassette containing board-receiving elements and probe plates.","Only cassettes need changing for different boards while a standard-format fixture connector and wiring harness remain reusable.","The disclosure describes a special contact-testing board for checking probe alignment and correspondence.","A board-specific characterising hole, optical detector, and activation interlock can reject an erroneous board, closely anticipating context-linked engagement prevention."]},{"source_id":"SRC2","title":"Cartridges","publisher":"FixturFab","url":"https://docs.fixturfab.com/fixtures/cartridges","source_type":"FIRST_PARTY_PRODUCT","claims_supported":["Commercial replaceable cartridges let fixtures be updated for an updated DUT or reused for a new product.","A cartridge can be swapped for a new board revision while the base frame, actuation mechanism, feedthrough plate, and instrumentation wiring remain with the base.","Cartridges seat on precision guide pins and lock into a compatible base for repeatable alignment."]},{"source_id":"SRC3","title":"Reusable Mechanical Test Fixtures – An Introduction","publisher":"Robson Technologies, Inc.","url":"https://www.testfixtures.com/reusable-mechanical-test-fixtures-introduction/","source_type":"FIRST_PARTY_PRODUCT","claims_supported":["Commercial bed-of-nails systems combine a universal press base with quick-swap, UUT-specific interface modules.","The interchangeable module aligns test points and routes probe signals to a tester-friendly invariant interface using an integrated breakout board.","The shared base is expressly reusable when new devices or test requirements arise, avoiding a complete dedicated fixture for every device."]},{"source_id":"SRC4","title":"Automated safety test – HiPOT fixture","publisher":"DSE Test Solutions A/S","url":"https://dsetestsolutions.com/c/cases/automated-safety-test-hipot-fixture","source_type":"FIRST_PARTY_PRODUCT","claims_supported":["An implemented test platform uses exchangeable cassettes to change products while retaining the same platform and setup.","For energized testing, the cassette interface must withstand the applied voltage and prevent leakage current.","The implementation uses lid-open power removal, lid locking, and instrument interlocks, showing that energized deployment requires additional electrical-safety controls."]}],"problem_evidence":{"status":"SUPPORTED","finding":"The problem is visible: historical patent literature says different circuit-board designs require corresponding probe arrangements and that changing individually installed probe plates disrupts production; it also identifies manual high-density wiring as error-prone. Current suppliers sell revision- or DUT-specific cartridges precisely so a common fixture base and instrumentation wiring can be retained across updates. The sources support recurring incompatible fixture mappings and costly reconstruction, although they do not quantify how often wrong-revision connections damage boards or instruments.","source_ids":["SRC1","SRC2","SRC3"]},"closest_prior_art":[{"name":"Electronic test fixture, U.S. Patent 4,797,610","source_ids":["SRC1"],"overlap":"Combines a shared pressure frame, readily interchangeable board-specific cassettes, reusable standard connector/harness, board alignment, erroneous-board discrimination tied to a characterising hole, an activation interlock, and a special contact-testing board for cassette verification.","remaining_difference":"Its wrong-board guard is described as an optical emitter/detector controlling an interlock rather than complementary passive geometry directly preventing contact. The retained text does not establish the proposed break-before-release mechanism or fixed copper routing as part of the same cassette."},{"name":"FixturFab replaceable cartridges","source_ids":["SRC2"],"overlap":"A current commercial system swaps a cartridge for a new board revision while sharing the fixture frame, actuation, feedthrough plate, and instrumentation wiring; precision guide pins provide repeatable mechanical seating.","remaining_difference":"The source does not state that each board revision and cartridge have complementary unique keys, that an unknown board physically blocks closure, or that cassette removal necessarily opens every measurement circuit before release."},{"name":"RTI reusable mechanical fixtures with integrated breakout-board routing","source_ids":["SRC3"],"overlap":"A shared press accepts device-specific quick-swap bed-of-nails modules that align the DUT and use an integrated breakout board to route probe signals to stable tester-facing connectors.","remaining_difference":"The source does not disclose revision-specific passive mismatch rejection, a break-before-make cassette interlock, exposed active-map identity, or a dedicated re-entry continuity coupon."},{"name":"DSE exchangeable safety-test cassette","source_ids":["SRC4"],"overlap":"Uses exchangeable product-specific cassettes on one test platform and adds lid-open power removal, lid locking, and tester interlocks.","remaining_difference":"It concerns energized HiPOT safety and does not disclose board-geometry selection of a passive pad-to-port map; its safety switching may rely on relays and instrument controls."}],"prior_art_disposition":"SUBSTANTIAL_COLLISION","contrastive_claim_remaining":"A narrower, testable distinction remains: complementary geometry on both the board and its passive fixed-trace cassette—not a sensor, program, label, or operator choice—uniquely selects the pad-to-instrument mapping, physically prevents mismatched or unknown boards from reaching any electrical contact, and enforces all-contact break-before-cassette-release while preserving reproducible A-B-A mappings. The bounded search found the constituent practices and a notably close 1989 combination, but did not find this entire passive two-part keying and transition-guard arrangement in one retained source.","contrastive_claim_falsifier":"The claim is falsified by either prior art showing, in one system, a shared bed-of-nails base with revision-specific fixed-conductor cassettes, complementary board/cassette mechanical keys that prevent all wrong or unknown engagement, and break-before-release isolation, or by a prototype in which any wrong-key coupon closes a circuit, simultaneous cassette contact occurs, or either original continuity matrix fails to return after A-B-A cycling.","gates":{"adequate_source_search":{"status":"PASS","rationale":"The bounded search covered direct phrasing, historical terms and patents, current cartridge/module products, fixed-trace routing, mismatch discrimination, validation, and safety interlocks. Four opened direct sources from four publisher presentations were retained, including three first-party sources.","source_ids":["SRC1","SRC2","SRC3","SRC4"]},"supported_problem":{"status":"PASS","rationale":"Historical and current sources independently show board-specific probing/routing, error-prone manual wiring, disruptive changeover, and commercial demand for reusable bases with revision- or DUT-specific cartridges.","source_ids":["SRC1","SRC2","SRC3"]},"distinct_testable_claim":{"status":"PASS","rationale":"Despite substantial overlap, fully passive complementary board/cassette keying with all-contact mismatch rejection and break-before-release isolation remains operationally distinct and has explicit continuity-matrix and wrong-key falsifiers.","source_ids":["SRC1","SRC2","SRC3"]},"bounded_next_test":{"status":"PASS","rationale":"Two unpowered low-voltage cassettes and four continuity coupons permit exhaustive matching, mismatching, unknown-key, isolation, resistance, and 100-cycle A-B-A testing without production boards or active stimulus. The stated stop conditions are observable and rollback is simple removal of the prototype.","source_ids":["SRC1","SRC2","SRC4"]},"no_obvious_safety_or_authority_stop":{"status":"PASS","rationale":"The authorized first test is unpowered, low-voltage, uses sacrificial coupons, and remains under the fixture owner's authority. Energized or high-voltage use would require electrical-design approval and additional power-removal, leakage, lid-lock, and instrument-interlock safeguards, but that does not stop the bounded continuity prototype.","source_ids":["SRC4"]}},"screen_survival":false,"world_novelty_boundary":"This coarse four-source public-web screen identifies substantial prior-art collision and leaves only a narrower passive-keying and break-before-release distinction. It cannot establish world novelty, patentability, freedom to operate, market size, expert acceptance, realized value, or the absence of unindexed products, patents, internal fixtures, or non-English prior art."}