IMPROVEMENTS IN METALLIC PACKING
Year: 1877

page_text: PROVISIONAL SPECIFICATION left by Charles Adolphus Henry Jonas at the
Office of the Commissioners of Patents on the 13th April 1877. A communi-
cation from abroad by William H. Floyd, Trustee for the Metallic Stoam
Packing Association, Boston, in the United States of America.
CHARLES ADOLPHUS HENRY JONAS, of Studley Road, Clapham Road, in the
County of Surrey. "IMPROVEMENTS IN METALLIC PACKING." A communication
from abroad by William H. Floyd, Trustee for the Metallic Steam Packing Asso-
ciation, Boston, in the United States of America.
This Invention consists of a case made of two semi-cylindrical pieces of com-
position metal combined with a head ring made in two semicircular pieces joined
together and holding parts of the packing rings, which are pressed against the rod
by springs; also of the packing rings themselves, and the manner of placing them
in the case, the whole being easily attached and pressed into the stuffing box
without disconnecting the cross head, or other trouble.
The case is made either with a flange at the base projecting inwardly with head
rings at top, or the flange is placed at about the middle of the cylinder with a head
ring at both ends.
The packing for high-pressure engines has a number of spiral springs inserted in
the flange, a ring resting upon these springs, and upon this ring one or more sets of
packing rings are placed and pressed against the rod by springs. These packing rings
are formed of parts which join cach other by inclined joints, so arranged that the
pressure of springs upon certain parts in forcing them towards the piston rod will
be transmitted by the inclines to other parts, and thus force them in on to the
piston.
The head rings are made to lock into a dovetail or angular projection, and being
in soinicircular pieces are easily pressed on and fastened together by screws.
When the packing rings are properly placed and the head ring fastened on, the
pressure of the springs on the flange, and those in the case, will keep all the parts
in place and tight together.
There is a space around the ring resting on the springs in the flange and at back
of the packing rings, so that the steam pressure also helps to keep these rings tightly
gainst the head ring and piston rod.
For low pressure engines, where the steam pressure is outward and the exhaust
nward, several sets of packing rings are placed in the case with springs to keep

page_text: the parts pressed against the piston rod, and also spiral springs placed between two
sets of rings, so that when the head ring is fastened on, the parts are tight against
the head ring and the flange at the base.
To put the metallic packing on it is only necessary to open the stuffing box,
fasten the case around the piston rod with the springs in the flange at the base,
place a ring on these springs, the packing rings upon that ring and their springs
in the case, press each part of the head ring into the dovetailed or angular groove of
the case, fusten them together by screws, and then slide the whole into the stuffing
box.
On a new engine, pump, or machine, when the stuffing box has been turned out
true, a shaped copper, or other soft metal ring, with inclined joints, is placed in
front on the outer edge of the case to prevent any leakage of steam or other fluid
around the case or gland, but when the stuffing box is badly rusted, gummed up, or
corroded, a ring of gasket or rubber and canvas is put in a groove in the outer
face to prevent any leakage around case or gland.