GB2391730A — A safety switch within an electronic programmable system
Assigned to Sematic SpA · Expires 2004-02-11 · 22y expired
What this patent protects
A safety switch within an electronic programmable system e.g. a lift controller comprises a group of two single-contact relays 12, 13 connected in series magnetic sensors for the check of the contact status of each of the two relays, two calculation units connected to said magnet…
USPTO Abstract
A safety switch within an electronic programmable system e.g. a lift controller comprises a group of two single-contact relays 12, 13 connected in series magnetic sensors for the check of the contact status of each of the two relays, two calculation units connected to said magnetic sensors through respective control signal connectors 15 and 16 and by a common connector 17. The check of the status of said relays is managed by said calculation units and takes place by sending a fixed number of fixed-frequency width modulated pulses (pwm) to said magnetic sensors of each of the single-contact relays 12 and 13 through said connectors 15 and 16 and checking the return of the same pulses through the common connector 17.
Drugs covered by this patent
- Renvela (SEVELAMER CARBONATE) · Sanofi
Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.
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