Improvements in Packings for Steam Gauge Glass Glands and Tubes.
Year: 1892

page_text: 5
COMPLETE SPECIFICATION.
Improvements in Packings for Steam Gauge Glass Glands and Tubes.
I, TOM PAYNE KERMAN, of South William Street, Cardiff in the County of
Glamorgan, 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 present invention relates to improvements in packings for steam gauge glass
glands and tubes, and its object is to obviate the necessity which has hitherto been
inherent in gauge glass fittings, of compressing the packing between the gland and
the tube. It is, well known that this compressing the packing by screwing the
gland up too much, frequently breaks the glass, or, at least, keeps it subjected to
an unnecessary strain which it was never meant to bear.
According to my invention, I provide for the steam itself keeping the packing up
against the glass.
In order that the invention and the best means of carrying it into practical effect
may be thoroughly understood, I will now describe it and them in detail, referring
in so doing to the accompanying figures which are to be taken as part of the
Specification and read therewith.
Fig. 1 is a sectional side elevation of a gauge glass cock, gland and the end of a
tube.
Fig. 2 is a plan of the improved elastic ring.
Fig. 3 is a side elevation of it.
Fig. 4 is a transverse section of a modified kind of ring.
The elastic ring is the part which embodies my invention. It is made of any
suitable elastic material. India-rubber answers the purpose of the invention
perfectly, but any suitable substitute may be made use of.
The flange a is provided for the purpose of packing the junction of the gland b
to the stuffing box c. It may have a metal ring d cemented on to its outer face-
the one next to the gland-or the ring may be embedded in the flange as illustrated
in Figure 4.
The remaining portion a' of the ring is parallel on its inner face, but the outer
face is conical, tapering from the flange in the direction of the axis of the ring.
The ring, especially the conical portion a, is of a proper size to fit the tube e
properly, i.e., tightly without putting a strain upon it.
When the gland is screwed up, the ring is held immovable upon the tube. The
elasticity of the portion a¹ prevents the steam getting between it and the tube when
the gauge cock is first opened, and the chance of it ever doing so afterwards is
prevented by its constant pressure upon the conical surface.
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. A packing ring having an outer conical surface adapted to be presented to the
steam and an inner one to fit to the tube, as and for the purpose set forth.
2. The combination with a packing ring having an outer conical surface adapted
to be presented to the steam, an inner one to fit the tube of a metal ring attached
to or embedded in the flange of said ring as set forth.
Dated this 28th day of November 1892.
PHILLIPS & LEIGH,
22, Southampton Buildings, Chancery Lane, W.C., Agents for the Applicant.