sight-feed lubricator

No large engine should be without a cup of this kind as an auxiliary to the sight-feed lubricator.

In construction the above is similar to the brass "Banner" Sight-feed Lubricator, described on page 391.

Sight-feed lubricator (on stationary sleeve).

Lunkenheimer "Hercules" Sight-feed Lubricator is intended for the lubrication of air compressor cylinders where the pressure carried is very high.