Improvements in Rings for Steam Engine Stuffing Boxes and the like.
Year: 1894

page_text: Date of Application, 17th Dec., 1894-Accepted, 9th Feb., 1895
COMPLETE SPECIFICATION.
Improvements in Rings for Steam Engine Stuffing Boxes and
the like.
I, ROBERT MITCHELL DEWAR, of 83 Canton Street, Poplar, in the County of
London, Marine 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:-
My invention relates to improvements in rings for steam engine stuffing boxes,
and the like, which consists of two or more rings of brass made to fit the stuffing
box and to pass freely over rod or plunger, one ring is bevelled on one side to
suit mitre of existing ordinary neck bush or otherwise.
The other ring is suitably recessed on one side, and a third ring of antifriction
metal is made in three segments to fit the diameter of the rod but being left
smaller on the outer diameter than the diameter of the recess and of sufficient
thickness to work closely in the depth of recess. Across the three openings of the
segments on each side of the ring small recesses are made and tongue pieces fitted
to them; the segments and tongue pieces are kept together round the rod by a
spring enclosing the outer diameter with an inward pressure.
The rings are inserted in the stuffing box, the cut ring being in the ring recess,
and the box is filled with the usual packing.
The centre ring being movable in ring recess when in action moves with the
slighest side motion of the rod and is kept closely round the rod by the spring.
A little clearance is left at segmental cuts to allow for light wear round the rod.
The object of my invention is for the prevention of leaky glands of pistons, slide-
valves and pump rods.
And in order that my invention may be thoroughly understood, I now proceed
to describe the accompanying drawing thereof, reference being had to letters and
figures marked thereon.
Fig. 1, is a plan of the top of the ring fitted together in three segments and
enclosed by a spring.
Fig. 2, is a part in elevation and a part in vertical section of the ring, rod,
spring, box and cover.
This invention is constructed with a hard metal ring in three segments a recessed
together with tongue pieces 6 both at top and bottom of the ring joints and the
whole of the segments a are enclosed by a ribbon spring c so as to fit loosely in
the box d and to pass closely over rod f.
The three segments a which form the ring and spring cas in Fig. 1, are put
into a box d with a cover e and the stuffing box is packed as in ordinary cases.
The ring being movable in recess, moves with the slighest side motion of the
rod, thereby not perceptibly wearing round the rod and allowing steam and water
to pass to packing.
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 rings for steam engine stuffing boxes and the like, the combination of a
"

page_text: on the rod, substantially as herein described and according to the accompanying
drawing.
2. In rings for steam engine stuffing boxes and the like, the combination of a
hard metal ring in three segments a recessed together with tongue pieces 6 at top
and bottom and the ribbon spring c, substantially as herein described and according 5
to the accompanying drawing.
Dand shin 17th do of December 1804
J. P. BAYLY,
18, Fulham Place, W., Agent for the Applicant.