Improvements in Packing for Piston and other Rods.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in Packing for Piston and other Rods.
I, OLIVER IMRAY, of Birkbeck Bank Chambers, Southampton Buildings, in
the County of London, Chartered Patent Agent, do hereby declare the nature
of this invention (as communicated to me from abroad by Alexander Shaw, of
Jersey City, State of New Jersey, United States of America, Engineer,) to be
as follows:-
This invention relates to metallic packing for piston and other rods which
have to pass through openings without permitting leakage.
Two metallic pieces of trapezoidal form each having in its base a semicircular
recess fitting the piston rod are put together base to base embracing the rod
between them. They are held in position by two side pieces having inclined
hollows fitting against the inclined sides of the trapezoid, and these two side
pieces are held in position by a pair of bolts having helical springs under their
nuts. The trapezoidal pieces are preferably lined with antifriction metal against
which the rod works, and their bases do not quite meet but allow a little clear-
ance space so that they may be brought nearer together as the rubbing faces
wear. In order that there may be no leakage of fluid through the clearance
space, two sets of the trapezoidal and side pieces are employed set at right
angles to each other so that the clearance spaces are covered. These two pack-
ings are held between a pair of washers each made with a mitre projection like
the edge of a valve, these projections entering corresponding seatings, the one
in the cover of the cylinder the other in a plate which is secured to the cylinder
by bolts, so that the packings and the washers are all clamped between the
cover and the plate.
The clamping bolts may have springs under their nuts so as to allow the
packings to yield permitting escape from the cylinder in case of excessive
pressure.
Besides the packings above described there may also be metallic packing of
any known kind in the hollow of the stuffing box.
Deted this 20th day of Yavah 1800
ABEL & IMRAY,
Agents for the Applicant.
Improvements in racking for riston and other nous.
I, OLIVER IMRAY, of Birkbeck Bank Chambers, Southampton Buildings, in
5 the County of London, Chartered Patent Agent, do hereby declare the nature
of this invention (as communicated to me from abroad by Alexander Shaw, of
[Price 8d1

page_text: Jersey City, State of New Jersey, United States of America, Engineer) and in
what manner the same is to be performed to be particularly described and
ascertained in and by the following statement: —
This invention relates to metallic packing for piston and other rods which
have to pass through openings without permitting leakage, as I shall describe
referring to the accompanying drawings.
Fig. 1 is a part elevation part section on the line 1-1 of Fig. 2 which is a
sectional plan on the line 2-2 of Fig. 1.
5 is the piston or other rod passing loosely through a plate 6 secured to a
steam chest or ofher part by bolts 7 and nuts 8. The plate 6 has a socket 9
containing a packing ring 10 held in by a collar 11 screwed into the socket;
the inner surface of the ring 10 may have grooves 12. On the rod 5 is loosely
fitted a washer 13 having a rounded annular rib 14 fitting in a corresponding
recess 15 of the plate 6. Against the rod 5 bear two semicircular hollows
formed in the faces of packing metal 20 held in trapezoidal casings 16, the outer
ends of which are semicircularly hollowed for passage of the bolts 7 On each
side of the casings 16 is a piece 21 having inclined sides 17 fitting the sides of
the casings 16, and the two pieces 16 are pressed towards each other by bolts 22
having springs 23 adjustable by nuts 24. As there is a little space 19 between
the inner ends of the casings 16 and packings 20, the effect of the springs 23
pressing the inclined faces 17 against the casings 16 is to cause these to approach
towards each other pressing the packings 20; against the rod 5. There are two
complete sets of the packings 20 with the casings 16 pressing pieces 21-and
spring bolts, the division 19 of the one set being at right angles to that of the
other. Under these packings there is a washer 25 having a rounded annular
rib entering a corresponding hollow in a plate 26 which is held in place by
nuts 28 on the bolts 7. As the packings are held between the washers 13
and 25 and as their annular ribs can rock a little in the rounded hollows of the
plates 6 and 26, the whole packing can give a little to inequalities while still
remaining tight against leakage.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
Metallic packing constructed and operating substantially as described with
reference to the drawings.