Editing Automatic lubricator (section)

==Wakefield lubricator==
The Wakefield Oil Company, a manufacturer of  lubricating oils, was founded in London by [[Charles Wakefield, 1st Viscount Wakefield|Charles Wakefield]] in 1899. The company manufactured both hydrostatic and mechanical lubricators but it was best-known for its patent mechanical lubricator. Marketed as the ''Wakefield Lubricator'' it comprised a large oil chest (typically {{convert|1|impgal}} for eight delivery tubes) with [[Eccentric (mechanism)|eccentric-operated]] pumps submerged within it. Regulation of the oil feed was achieved by adjustment of [[sleeve valve]]s, which could be made to release oil back into the reservoir (instead of entering the feed tubes) at varying stages as the delivery stroke progressed. If the device were used to deliver heavy grade oil to the steam cylinders the reservoir was heated by a steam coil to allow the oil to pass more easily down the delivery tubes.<ref name=RFH/><ref>{{cite web|url=http://www.castrol.com/castrol/multipleimagesection.do?categoryId%3D8268009%26contentId%3D6003669 |title=Castrol timeline |accessdate=2021-10-27|url-status=dead |archiveurl=https://web.archive.org/web/20090517030709/http://www.castrol.com/castrol/multipleimagesection.do?categoryId=8268009&contentId=6003669 |archivedate=2009-05-17 }}</ref>