An Improved System of Packing Piston Rod and Valve Spindle Glands.
Year: 1894

page_text: COMPLETE SPECIFICATION.
An Improved System of Packing Piston Rod and Valve Spindle
Glands.
I, GEORGE WIMBLE DOWELL of 22 Evington Road, Leicester in the County of
Leicester, 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 :-
The object of my invention is to effect a system of packing piston rod and
valve spindle glands that will admit of the piston rod or spindle being easily
removed for repairs and thus economise time and labour in repairing; and also
to minimise the friction on the said piston rod or spindle as much as possible.
In order that my said invention may be the more readily understood I have
caused to be annexed to this Specification two sheets of drawings the different
figures and letters of reference marked upon which will be hereinafter reffered to.
Figure 1 is a longitudinal sectional elevation shewing my improved system of
packing à piston rod gland.
Figure 2 is a longitudinal sectonal elevation shewing my improved system of
packing a valve spindle gland.
I will first describe my improved system of packing a piston rod gland :—The
metallic packing A is placed in a casing B formed of hard brass or other suitable
metal or metals the said casing projects slightly (say " or ") outside the stuffing
box C, a suitable number of holes D, say six, are formed in the casing outside the
stuffing box so that the said casing which holds the rings and packing may be
If
removed from the stuffing box and drawn further down the piston rod E.
the packing should become fast in the casing it can be knocked out by tapping
the bush F with a piece of copper or other soft metal, the ring G being bushed
as shewn so that it can be passed over the enlarged end E' of the piston rod.
I place a spiral spring H in the casing B carefully adjusted with gland 1 to meet
the back pressure from the cylinder on the bush and casing; the gland I being
bushed for the purpose already named in the usual manner, and the spring bears
upon a ring J bushed in a similar way to ring G; I place washers K preferably
of cast iron round the bolts L and between the gland I and stuffing box C to
keep the gland from being screwed down too far and to indicate when it is in
proper adjustment. The packing A and bushes F and F1 being each in two
pieces are arranged so that they each break joint in the opposite direction to each
other.
I will now proceed to describe my improved system of packing valve spindle
glands-N is a casing and bush (N¹) combined, formed of hard brass or other
suitable metal or metals to accurately fit the stuffing box O, P is the metallic
packing, Qis a spiral spring between which and the metallic packing I place a
shouldered ring R to form a bearing for the said spring; the casing has holes S
formed in the projecting end T for the purpose of removing the same from the
stuffing box as already mentioned, U are washers for the purpose of limiting the
pressure of the gland upon the packing as already described in connection with
the piston rod packing. The gland X is also shouldered to received the head of
the spring.
The casings in each case are recessed externally at W to enable them to be
removed more easily and are more particularly designed for the purpose of
removing the metallic packing, springs and rings bodily from their position.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is :-
1. The improved system of packing piston rod glands with metallic packing A
in combination with rings G and J, bushes F and F', spiral spring H, in a
casing B having a projecting end with holes D therein, substantially as and for the
purposes described and illustrated.
2. The improved system of packing valve spindle glands with metallic packing P
in combination with a shouldered ring R, and spiral spring Q, in a casing N and
bush N¹ combined, having a projecting end T with holes S therein, substantially as
and for the purposes described and illustrated.
1
1004
W. SWINDELL,
Agent for the Applicant.