Improvements in Metallic Packings for Piston Rods or the like.
Year: 1892

page_text: Date of Application, 3rd Nov., 1892
Complete Specification Left, 29th July, 1893-Accepted, 2nd Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Metallic Packings for Piston Rods or the like.
I, THOMAS WALKER of Baxter's Works, United Alkali Company Limited,
St. Helens, in the County of Lancaster, Engineer, do hereby declare the nature of
this invention to be as follows:-
This invention has for its object a metallic packing for piston valve rods and the
like.
In carrying my invention into effect, I provide a hollow cone or sleeve bored out
to receive the metallic packing rings. These metallic rings are made of suitable
metal and are turned outside to fit the cone or sleeve and bored to fit the piston rod,
a piece being cut out of each ring to allow them to close on the rod.
At the bottom
of the stuffing box or its equivalent (in which the hollow cone and the rings are
placed) I locate a coiled or other suitable spring and on top, of this spring a small
bush to enable the spring to keep the rings together and also keep the vacuum from
drawing them too tight on the piston rod. The packing rings are regulated by
means of a gland adjusted by means of nuts. This packing is practically frictionless
and keeps the rod true, making it as bright as silver. It is very simple in
construction, will stand any steam pressure and can be fitted to any engine.
Dated this 2nd day of November 1892.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Metallic Packings for Piston Rods or the like.
I, THOMAS WALKER, of Baxter's Works, United Alkali Company, Limited,
St. Helens in the County of Lancaster, 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 has for its object a metallic packing for piston rods, valve rods and
the like.
It is best described by aid of the accompanying drawing, in which,
Figure 1 is a section, and
Figure 2 a sectional plan, the section being taken through the line A, B.
In these―
C, is a stuffing box, D a hollow cone or sleeve bored out to receive the metallic
packing rings E. The cone D is held down by the stud I and nut J. The metallic
packing rings E are made of any suitable metal ordinarily used for making packing
rings. They are turned on the outside to fit the sleeve Ď and on the inside to fit
the piston rod. A piece is cut out of each so as to allow them to close in on the
rod. F is a gland of the usual type held down by nuts K on the three studs I I.
G is a second gland and H a helical spring pressing against this gland and causing
the gland to press against the bottom packing ring E.
The mode of action is as follows-
The spring H and the gland G are first placed in position, the sleeve D is then
inserted and screwed down. Next, the rings E are placed in position, such that the
opening of one ring is covered by the next, then the gland F is inserted, and this is
screwed down as tight as it is desirable against the pressure of the spring H, by
means of nuts K. As wear in the rings E takes place, the gland F is further
pressed down by means of studs K, thus tightening the rings E by causing them to

page_text: close on the rod. The spring H is useful to keep the rings together and also to
keep the vacuum from drawing them too tightly down onto the piston rod. I have
found this packing practically frictionless, thus keeping the rod true.
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. The arrangement and construction of metallic packings for piston rods or the
like, consisting of slotted conical rings, a conical sleeve or bush and spring taken as
a whole substantially as herein described and illustrated.
2. The combination of the sleeve D bored slightly conical with slightly conical
packing rings E having a piece cut out, and devices for compressing the same in the
sleeve D substantially as described.
3. In metallic packings, the combination with the packing of a spring such as H
in the stuffing box and a gland G, the whole pressing the metallic packing outward
from the stuffing box parallel with the piston rods substantially as described.
Dated this 27th day of July 1893.
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Nottingham, and London, Patent Agents.