CREAMERY BUTTER MAKING 



185 



Lubricator. This device serves to supply oil to the 

 cylinder. There are various forms of lubricators one 

 of which is illustrated in Fig. 53. The working of this 

 lubricator may readily be understood by following the 

 course of the steam as indicated by the arrows. 



The steam condenses in the 

 small pipe, enters the bottom 

 of the oil cup where the con- 

 densed steam displaces an 

 equal quantity of oil, which, 

 being lighter than water, is 

 forced up and overflows into 

 a pipe placed inside the lubri- 

 cator whence it may be seen to 

 escape in drops through the 

 glass tube. From'here it pass- 

 es with the steam into the 

 cylinder. 



Pipes and Piping. The 

 main pipe is that which con- 

 ducts the steam from the boiler to the engine. This pipe 

 should be well covered with non-conductor to prevent 

 loss of heat. 



A very efficient and inexpensive pipe covering is made 

 by mixing wood sawdust and common starch, using them 

 in the proportion to form a thick paste. Such a paste will 

 adhere perfectly to wrought or cast iron pipes when ab- 

 solutely free from grease. A thickness of one inch is 

 sufficient. 



The exhaust steam pipe carries away the steam after it 

 has been used in the cylinder. To make the best use 

 of the heat that remains in exhaust steam, this pipe 

 should first be carried through a water tank located in the 



Fig. 53. Lubricator. 



