range of sizes with capacities ranging from 8 to 36 pints, and the number of feeds from 1 to 26. Each of the lubricators consist of a reservoir, a ratchet assembly, a sliding shaft assembly, and the pump units. A screwed oil filler cap is fitted to the lockable hinged lid of the reservoir and a sight glass for indicating the oil level is fitted to the front face of the reservoir. The pumps of the DV type lubricator are operated by a sliding shaft assembly, unlike the Silverton or Wakefield lubricators which are operated by a rotating camshaft. The FSA type lubricator differs by each pump having two separate pistons to control the pumping & distribution of oil. The pistons are driven by cams on the driving shaft. The driving shaft is driven via a means of a roller ratchet assembly which converts the reciprocating motion of the operating linkage to rotary motion. Wick feed lubricator Known also as syphon lubrication, equipment using this method consists of reservoirs of oil with delivery pipes from the reservoir to the bearings, axleboxes, slide bars or horn blocks, mounted so that the open top ends of the pipes are above the maximum oil level. Assemblies called trimmings—bundles of worsted yarn tied around narrow wire frames—are tucked into the open ends of the delivery pipes so that a "tail" of threads drapes into the oil. Capillary action draws the oil over the lip of the pipe for delivery by gravity. Variation in delivery rates comes from adjusting the size and tightness of the worsted bundles. The bundles of wool are effective in filtering out harmful contamination but do not work properly should water enter the reservoir. See also Splash lubrication References External links Steam locomotive technologies Locomotive parts English inventions Lubrication