{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp12_substrate_denial72_20260805","research_id":"eoa_inverse_innovation_exp12_light_screen_20260805","cell_id":"authority_legitimacy_and_consent_foundations__computer_science","search_lanes":{"direct_problem_and_intervention":{"queries":["push-pull bus contention two drivers damage excessive current application note","bus driver power isolation mechanical selector maintenance programming backplane","JTAG maintenance bus multiple masters hardware multiplexer isolation"],"source_ids":["SRC1","SRC3"],"no_result_note":"No direct source was found for the complete captive-shuttle maintenance-bus fixture; phrase-level absence was not treated as novelty evidence."},"synonyms_and_historical_terms":{"queries":["redundant controller maintenance bus hardware arbitration bus guardian firmware independent","time triggered architecture bus guardian hardware independent controller paper","babbling idiot failure shared bus guardian"],"source_ids":["SRC1","SRC3"],"no_result_note":null},"products_practices_and_standards":{"queries":["mechanically interlocked one-of-N selector switch break before make product datasheet","mechanical interlock contactors prevents simultaneous closing product","power supply series interlock chain jumper emergency stop"],"source_ids":["SRC2","SRC4"],"no_result_note":null},"component_combination":{"queries":["mechanical selector one-of-N contactor interlock pre-energization voltage test timer trip","trapped key interlock selector contactor voltage check transfer switch source quality","removable jumper inhibit module energization interlock common trip cable"],"source_ids":["SRC2","SRC3","SRC4"],"no_result_note":"The search exposed adjacent implementations of mechanical mutual exclusion, independent bus guardians, and series shutdown chains, but no retained source combined all of them with an N-bay maintenance-bus shuttle, analog driver qualification, scoped module inhibits, and timed release."}},"sources":[{"source_id":"SRC1","title":"A Basic Guide to I2C","publisher":"Texas Instruments","url":"https://www.ti.com/lit/an/sbaa565/sbaa565.pdf","source_type":"OFFICIAL_GUIDANCE","claims_supported":["Opposing push-pull outputs tied to one bus can produce an indeterminate line state and a low-impedance current path capable of damaging devices.","Open-drain wired-AND signaling and protocol arbitration are established alternatives that avoid destructive push-pull contention but do not provide a uniquely powered push-pull writer."]},{"source_id":"SRC2","title":"VM96-4 Mechanical Interlock Unit for AF Contactors","publisher":"ABB","url":"https://empower.abb.com/ecatalog/ec/EN_CA/p/1SBN033405T1000","source_type":"FIRST_PARTY_PRODUCT","claims_supported":["A commercially available mechanical interlock physically prevents either of two contactors from closing while the other is closed.","Mechanical mutual exclusion of power paths is therefore established product practice, although this product page does not describe maintenance buses, N-way shuttles, qualification tests, timers, or module inhibits."]},{"source_id":"SRC3","title":"Modular Formal Analysis of the Central Guardian in the Time-Triggered Architecture","publisher":"University of Ulm / Reliability Engineering & System Safety","url":"https://www.uni-ulm.de/fileadmin/website_uni_ulm/iui.inst.090/Publikationen/2007/ress07.pdf","source_type":"PRIMARY_RESEARCH","claims_supported":["Independent hardware guardians placed between nodes and a shared communication medium are established prior art for restricting faulty-node transmissions.","The analyzed guardian grants write access only during predefined time slots using static system knowledge, demonstrating hardware-enforced bus authority independent of host application behavior.","This approach remains electronically scheduled and does not disclose a captive mechanical one-of-N service selector or the proposal's complete safeguard combination."]},{"source_id":"SRC4","title":"Interlock","publisher":"Matsusada Precision","url":"https://www.matsusada.com/support/terms/ps/interlock.html","source_type":"OFFICIAL_GUIDANCE","claims_supported":["Industrial power-supply interlocks commonly use closed contact inputs whose opening immediately disables output and rejects local ON commands.","Series safety chains, removable shorting jumpers, emergency-stop contacts, normally-closed fail-safe logic, and manual reset after a trip are established practices.","These practices overlap the proposed continuity links and trip path but do not themselves choose one maintenance-bus controller."]}],"problem_evidence":{"status":"PARTLY_SUPPORTED","finding":"The electrical core of the problem is visible: documented push-pull contention can create indeterminate bus levels, high current, and possible device damage, while bus-guardian research treats faulty-node access to shared media as requiring an independent enforcement component. The bounded search did not directly document the proposal's narrower scenario of overlapping recovery connections corrupting firmware across a modular backplane, so prevalence and the full causal scenario remain unverified.","source_ids":["SRC1","SRC3"]},"closest_prior_art":[{"name":"Independent time-triggered bus guardian","source_ids":["SRC3"],"overlap":"An autonomous hardware component supervises node output and grants shared-medium write access according to static authority information, limiting the effects of faulty controller behavior.","remaining_difference":"It uses electronic timing and stored schedules rather than a captive, spatially exclusive service token; it does not disclose analog stuck-output qualification, per-module physical inhibits, or a spring-return service interval."},{"name":"ABB VM mechanically interlocked contactors","source_ids":["SRC2"],"overlap":"A physical interlock prevents two electrical power contactors from being closed simultaneously, closely matching the proposal's core energy-path exclusion principle.","remaining_difference":"The cited product is a two-contactor accessory, not a captive N-bay bus-driver selector with keyed segment scope, leading analog tests, timed release, or affected-module revocation."},{"name":"Series power-supply safety interlock chain","source_ids":["SRC4"],"overlap":"Normally-closed series contacts, removable jumpers, and an emergency-stop input can independently inhibit or immediately remove power.","remaining_difference":"The practice supplies inhibition and revocation but not exclusive selection of one controller, inspection of selected bus scope, or pre-energization driver testing."},{"name":"Open-drain multi-controller arbitration","source_ids":["SRC1"],"overlap":"Multiple controllers can share a wired-AND bus without destructive contention and arbitrate bus ownership through the electrical protocol.","remaining_difference":"It changes the physical signaling model and relies on compliant protocol behavior; it neither isolates push-pull driver power nor produces one mechanically bounded maintenance writer."}],"prior_art_disposition":"ADJACENT_PRIOR_ART","contrastive_claim_remaining":"The remaining testable claim is the specific integration: one captive N-position mechanical element directly routes driver-stage energy to at most one maintenance controller, while leading analog contacts reject a stuck or nonquiescent selected path, segment-specific series links inhibit energization, and independent trip and spring return revoke it without functioning controller firmware. Each constituent principle is adjacent prior art; the retained sources did not show this complete maintenance-bus combination.","contrastive_claim_falsifier":"The contrast is falsified by a public pre-existing implementation that combines those functions for a shared programming or maintenance bus, or experimentally if any permitted transition or single tested fault powers two dummy driver stages, the analog pretest accepts the deliberately stuck driver, a withdrawn link fails to inhibit closure, or the trip or timer fails to remove power within its predefined limit.","gates":{"adequate_source_search":{"status":"PASS","rationale":"The bounded screen covered direct terminology, bus guardians and older fault-containment language, bus arbitration alternatives, first-party mechanical interlocks, series safety chains, and combinations of selector, pretest, timer, and trip concepts. Four opened sources span four publishers and include primary research and first-party material.","source_ids":["SRC1","SRC2","SRC3","SRC4"]},"supported_problem":{"status":"PASS","rationale":"The general contention hazard and need for independent shared-medium access enforcement are supported, although the exact recovery-backplane prevalence and firmware-corruption scenario are only partly supported.","source_ids":["SRC1","SRC3"]},"distinct_testable_claim":{"status":"PASS","rationale":"Despite adjacent prior art for every major subproblem, the integrated claim is operationally distinct and falsifiable through simultaneous-current measurements, stuck-output injection, inhibit withdrawal, and revocation timing.","source_ids":["SRC1","SRC2","SRC3","SRC4"]},"bounded_next_test":{"status":"PASS","rationale":"A fused extra-low-voltage two-bay dummy fixture with independent current probes and oscilloscope monitoring can test mutual exclusion, contact transitions, analog qualification, link inhibition, trip response, timer expiry, bounce, and a simulated welded contact without writing firmware or connecting production equipment.","source_ids":["SRC1","SRC2","SRC4"]},"no_obvious_safety_or_authority_stop":{"status":"PASS","rationale":"The authorized first step is confined to current-limited extra-low-voltage dummy loads under a laboratory electrical-safety owner, with production, writable, high-energy, and safety-critical systems expressly excluded. Fail-safe series interlocking and immediate shutdown are consistent with established guidance; component ratings and predefined response limits must still be approved before construction.","source_ids":["SRC2","SRC4"]}},"screen_survival":true,"world_novelty_boundary":"This coarse, bounded public-web screen found only adjacent prior art, not proof of novelty. It cannot establish world novelty, patentability, market size, expert acceptance, superiority, realized value, or absence of undiscovered products, patents, standards, or private implementations."}