71 MACH 



hows a gland and stuthiiL' i>"\ t'"r a li'ii. ntal n>d. 

 The essential diil'i-rence between this example and the last is 

 in the mode of lubrication. Tin- L'land flange has cast within 

 it an oil-box which is covered by a lid . this lid is kept shut 

 or open by the action of a small spri >wn, A 



cotton wick (not shown in tin- figure) has one end i railing in tin- 

 nil in the oil-box, while the other is carried <>v ? and passed 

 down the hole A B. Tin \\ i -k acts as a siphon, and drops the 

 oil gradually on to the rod. In this example only two bolts 

 are used for screwing in the gland ; and the flanges of the gland 

 and stutVmg-hox are not circular, luit \ -al -shaped. 



In the case of small rods the gland is made entin 

 brass, and no liner is then necessary. I nows a form 



of gland and stuffing-box sometimes used for small rods. Th- 

 stuffing-box is screwed externally, and carries a nut A I' which 

 I the 



<;i<ind and Stuffing-box /<// 

 I>raw the views bhown in fig. 01 to the dimensions givi-n. Seal.- ', 



1. \KRCISE 64: (il<ui<l (tii<l Sfii m ffinr/-hn.r fur <i Hofl '"'"< I 



Fig. 02 shows a plan, half in section, and an elevation half of which 

 is a section through the gland flange. Draw these to a scale of 6 



to a foot, using the dimensions marked in the li 

 BXKBdH 65: ^ irwed Glan<1 <ui<l Stuffing-box. Draw, full 

 size, the views shown in fig. 03 to the given dimensions. 



A more elaborate form of gland and stuffing-box is shown 

 in fig. 04. This is for a large marine engine with inverted 

 cylinders, such as is used on board large ocean steamers. The 

 stuffing-box is cast separate from the cylind. bo which 



it is afterwards bolted. The lul.ricant is first introduced to 

 the oil-boxes marked A, from which it passes to the recess B, 

 where it comes in contact with the piston rod. To prevent 

 the lubricant from being wasted by running down the rod, tin- 

 main gland is provided with a shallow <:land and stutlini: 

 which is filled with soft cotton packing, which soaks up the 

 Lubricant 



The main gland is screwed up by means of six bolts, and 

 to prevent the gland from locking itself in the stuffing l"'\ ir 



