About: http://webisa.webdatacommons.org/278096582

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	A device according to claim 4, wherein each of said springs is a tension spring extended between a point on the shoe and a point part-way along the pendulum.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com