lubricator

By this simple contrivance the capillary action can be stopped or renewed in a second, without removing the top of the lubricator.
A Dictionary of Arts, Manufactures and Mines|Andrew Ure
The ratchet wheel and pawl shown in fig. 48 are part of the lubricator.
Gas and Oil Engines, Simply Explained|Walter C. Runciman
The classification lamp, lubricator and order or reading lamp, are controlled by a small switch on the socket of each lamp.
The Traveling Engineers' Association|Anonymous
At half past three the investigation had got as far as the lubricator.
The Valiants of Virginia|Hallie Erminie Rives

When valves appear dry while using steam and the lubricator is working all right, what would you do to relieve these conditions?
The Traveling Engineers' Association|Anonymous

British Dictionary definitions for lubricator

lubricator

/ (ˈluːbrɪˌkeɪtə) /

noun

a person or thing that lubricates

a device for applying lubricant

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012