Improvements in and relating to Lubricators.
Year: 1891

page_text: Date of Application, 3rd July, 1891-Accepted, 8th Aug., 1891
COMPLETE SPECIFICATION.
Improvements in and relating to Lubricators.
I, JAMES LIONEL GRANDISON of the "Steam Cylinder Lubricator Co.
Limited," the Gordon Works, Lower Broughton, Manchester in the County of
Lancaster, Mechanical Engineer, do hereby declare the nature of this invention,
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
This invention relates to lubricators such as are described and illustrated in and
by the Specification of Letters Patent granted to me No. 13292 dated the 1st day
of October A.D. 1887.
These improvements, which I will hereinafter fully describe with reference to
the accompanying drawings, relate to the construction and arrangement of the
stuffing box gland and oil cup for the piston rod, of the packing for the piston, and
of the base of the apparatus.
In the drawings :-
Figure 1 represents a vertical section of the lubricator;
Figure 2, a vertical elevation, and Figure 3 a vertical section of the stuffing box
gland and oil cup for the piston rod, drawn to an enlarged scale; and
Figures 4 to 8, details of a dummy piston block on and by means of which
packings for the lubricator piston are made.
A is the cylinder cast or formed in one piece with the base C, and fitted with
the piston B secured upon the hollow piston rod D through which, as described in
my former Specification, the lubricating material is admitted to the interior of the
cylinder. In the bottom of the cylinder there is formed a tapped hole closed with
a screwed plug E for convenience in cleaning the cylinder when required. It will
be understood that when the apparatus is in use the screwed plug is firmly
screwed up so as to prevent leakage and that it is removed only for cleaning the
cylinder.
The packing for the piston consists of spirally arranged layers of thick cotton
tape H, sewn or similarly secured together. In the construction of this packing
I employ the dummy piston block shewn by Figures 4 to 8 inclusive; Figure 4
being a side elevation of the block, Figure 5 a sunilar elevation with the top plate
removed, Figure 6 a plan of Figure 5, Figure 7 a vertical section corresponding
with Figure 5, but with the packing thercon; and Figure 8 a plan of the block
also with the plate removed and with the packing thereon, and shewing the end of
the tape before it is severed.
The dummy block is constructed to the dimensions of the actual lubricator
piston and is formed in two parts, which are secured together during the construc-
tion of the packing by means of a set screw or bolt passing through a central hole
in each part. The part of the block on which the packing is constructed consists
of a projecting ring F through which any convenient number of holes may be
formed as indicated at G. The thick cotton tape H is wound upon the ring to the
desired thickness (the top plate being in place) and the several layers are then
secured together. This is preferably effected by means of wire passing through
the layers and one of the holes G and returned through the same hole, as many of
these wire stitches as required being formed in each of the holes G. Instead of
wiring the layers together as described, they may be secured by pins or wire staples
in which case the holes G may be omitted from the ring F, but I prefer to proceed
as first described. The ring of packing having thus been formed, the top plate of
the block is removed and the packing is transferred to the lubricator piston.
The hollow piston rod passes through a stuffing box, a packed gland, and an oil

page_text: cup, the packed gland and the oil cup being represented by Figures 2 and 3 which
are drawn to an enlarged scale.
The oil cup K is screwed upon the stuffing box L in such a manner that the lip
of the packed glaud M is clipped and secured between the bottom of the oil cup
and the top of the stuffing box. The packing is held in the gland and tightened as
required from time to time by means of the hollow adjustable screw N.
Except as hereinafter.claimed with reference to. the foregoing description, the
general construction arrangement and operation of the apparatus are substantially
the same as set forth in the Specification of my former Letters Patent.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is,
1. In a lubricator of the type herein before set forth, constructing and arranging
the cylinder and base in one piece with a central hole therein closed by a screwed
plug, substantially as and for the purpose hereinbefore described and as illustrated
by the accompanying drawings.
2. In a lubricator of the type hereinbefore set forth, a packed gland constructed
and arranged substantially as herein before described and as illustrated by the
accompanying drawings.
3. In a lubricator of the type hereinbefore set forth, the combination with the
piston rod stuffing box of a packed gland and an oil cup, constructed and arranged
substantially as hereinbefore described and as illustrated by the accompanying
drawings.
4. Packing for the pistons of lubricators constructed substantially as and by the
means hereinbefore described with reference to the accompanying drawings.
Dated this 1st day of July A.D. 1891.
WILLIAM E. HEYS,
Agent for the Applicant.