About: http://webisa.webdatacommons.org/366077025

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	signals at terminal 20S. Alternately, a microprocessor or other control system may generate turn-on and turn-off signals, appearing at output 20S, at any arbitrary time within a cycle of the voltage waveform V.sub.a-b.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com