{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9631838","patent":{"patent_number":"US-9631838","title":"Boiler control comprising analog up/down timer circuit for generating variable threshold signal","assignee":null,"inventors":[],"filing_date":"2016-02-05T00:00:00.000Z","publication_date":"2017-04-25T00:00:00.000Z","cpc_codes":["H02M"],"num_claims":20,"abstract":"An apparatus comprises a sensor circuit configured to detect activation of at least one circulator arranged to circulate liquid from a boiler through at least one circulation loop and back to the boiler. An analog up/down timer circuit has an input coupled to an output of the sensor circuit and generates a variable threshold signal that varies as a function of an activation time of the at least one circulator. A burner control circuit receives the variable threshold signal from the analog up/down timer circuit and generates an ignition control signal based at least in part on comparison of a temperature sensor signal of the boiler with the variable threshold signal. An ignition driver receives the ignition control signal from the burner control circuit and generates an ignition signal for a burner configured to burn fuel to heat the liquid in the boiler based at least in part on the ignition control signal."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Boiler control comprising analog up/down timer circuit for generating variable threshold signal","description":"An apparatus comprises a sensor circuit configured to detect activation of at least one circulator arranged to circulate liquid from a boiler through at least one circulation loop and back to the boil","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9631838","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9631838","citation_suggestion":"Patentable. \"Boiler control comprising analog up/down timer circuit for generating variable threshold signal\" (US-9631838). https://patentable.app/patents/US-9631838","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9631838","json":"https://patentable.app/api/llm-context/US-9631838","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T06:44:01.752Z"}