Improved Guard or Protector for Gauge Glass Fittings.
Year: 1899

page_text: Date of Application, 18th Mar., 1899-Accepted, 13th May, 1899
COMPLETE SPECIFICATION (AMENDED).
Improved Guard or Protector for Gauge Glass Fittings.
We, JOHN JAMES ROYLE, of Dalham Works, Manchester, Engineer, and JoHN
GLOVER, of Ivy Terrace, Urmston, 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:-
Our invention relates to a new construction of protector or guard for use on
water-gauge fittings on steam boilers consisting of a frame for holding one or
more pieces of thick glass, so that in case the gauge glass bursts the water and
debris are prevented from flying about to the danger of the boiler attendants.
On the accompanying sheet of drawings Fig. I illustrates a front perspective
elevation of our improved guard.
Figs. 2 and 4 illustrate plans respectively of the lower and upper parts of the
guard.
Fig. 3 illustrates a sectional plan taken along the line a-b.
in all the views (A) is the upper end-piece shaped to surround the packing
gland nut or a suitable projection thereon of the upper part of the gauge, and (B)
the lower end piece shaped to surround and rest upon the lower cap of the
water gauge.
These end pieces are held apart by corner pieces (C) of any
suitable shape preferably rivetted or otherwise secured in position. The upper
end-piece (A) is pierced with ways or passages (D) (see Fig. 3) through which
pieces of thick plate glass (E) can be inserted. These pieces of glass are of a
suitable length to extend to the bottom end-piece (B) where they rest upon a
oushion of flexible material in recesses (F) of a corresponding shape, and are
finally secured in position by a closing plate (G+) fixed by screws (H) screwing
into the plate (G). A cushion of elastic material also lies between the top ends
of the glasses and the plate (G) to ensure of a yielding abutment.
It will be obvious from a consideration of the construction of this frame that
the protective glasses can be readily replaced in case of breakage, or withdrawn
for cleaning, without taking the whole frame to pieces, as it is only necessary
to remove the top plate (G) to enable the protective glasses to be slid into and
out of position. Moreover, the absence of all contact with metallic objects,
ensures of the glasses more effectually withstanding the impact of the debris.
Our invention also comprises a hinged door (I) for the purposes of closing in
the back part of the protector in ordinary working, and secondly to carry a
reflector of level indicator to ensure of a more perfect and easy reading of the
water gauge.
The door is held frictionally so that in case the gauge glass breaks it is readily
blown open to admit of the escape of the stosi.
The improved protector may rest in position on the water-gauge fitting without
altachment, but to prevent accidental displacement it may be secured in position

page_text: in various ways one of which is illustrated in Figs. 1 and 4 and consists of a
clamp (K) which surrounds the bottom gland of the water gauge fitting so that
by tightening the clamping screw (L) and hinge screw (M) the protector may
be firmly attached to the water gauge.
It will be obvious that the improved guard may be worked out in V, multi-
angular, or rounded form. The corner pieces (C) are made in various lengths
to suit the length of gauge glass.
Having thus particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:
-
1:—The combination and arrangement of parts constituting our improved
gauge glass protector. as herein set forth and illustrated on the accompanying
drawings.
2: In a guard or protector for gauge glass fittings, two end plates adapted
to encircle the gauge glass or its mounts, one formed with recesses and the other
with openings for the reception of thick plate glass and a cover plate and screws
and elastic cushions for holding the glass in position as herein set forth and
illustrated on the accompanying drawings.
nated this. 17th day of March 1899.