Improvements in Means for Guiding and Packing Rods.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in Means for Guiding and Packing Rods.
I, HUGO LENTZ, Mechanical Engineer, of Bruenn, in the Empire of Austria,
do hereby declare the nature of this invention to be as follows;-
My invention relates to means for guiding rods and forming a tight joint
around the same, thereby doing away with the stuffing boxes heretofore used
for this purpose, and reducing the friction considerably.
The present invention may be applied with advantage in any case where it
is necessary to form a tight joint around rods which are connected to pistons,
plungers, valves, etc., and at the same time reduce the friction, but it is particu-
larly useful in puppet valve engines.
In
Such valves are generally lifted by the valve gear and closed by springs.
order to form a tight joint around such a valve rod, stuffing boxes which press
the packing material around the same, are in general use.
The friction between
the packing and the rod takes a considerable amount of power to overcome.
Every time such valves are lifted, the engine will not only slacken down, but by
tightening the stuffing boxes too much, or too much one side, the friction produced
may become so great that the spring is not able to seat the valve. When using
a stuffing box, that part of the rod which comes into contact with the packing is
worn out much faster than the other parts of the same, and such a worn rod is
very hard to pack and must be renewed.
It is the object of the present invention to overcome these difficulties and
form a tight joint around such rods and also reduce the friction and wear.
I will describe my invention by the aid of the accompanying drawings, in
which:-
Fig. 1 is a vertical section of my rod-guide and packing for a vertically
moving rod.
Fig. 2 is a section showing my invention applied to a horizontally moving rod,
Fig. 3 is a cross section on the line 3-3 of Fig. 2, and Fig. 4 shews a modi-
fication.
Like figures represent similar parts in all the figures.
Referring to Fig. 1 the rod T to be guided and packed, has a number of
Said box has in the centre
grooves r, and is guided in the holes h h¹ of box v.
a chamber w, and on the exterior an oil cup r, which is always kept filled with
oil. Part of rod T enters the space A containing the steam, gas or other
fluid, which is to be prevented from passing around the rod and escaping into the
atmosphere B. When the rod moves up, the part of said rod enters the oil
cup, and on the downward movement carries oil with it, thereby lubricating
said part of rod T. The surplus oil taken along by part of the rod T, also
the vapor, water, gas, etc., rising from space A, collect in chamber w, and this
mixture or fluid lubricates the part of rod T and also fills up the space
and passes between the rod and rod-guide. Pipes entering said chamber we carries off
the surplus of the mixture collected therein, and to it may be attached a
cock.

page_text: I wish it to be understood that whilst I prefer to use a grooved rod T,
I do not limit myself thereto, and consider the like use of a smooth rod to
be within the scope of my invention. Chamber can be of any form without
departing from my invention so long as the vapor, water, gas, oil, etc., rising
from space A can collect in the same. This chamber we may be, for instance,
a spiral groove which winds around rod T, or it may consist of several holes
which radiate from the rod and are united in a ring-shaped or other formed
-chamber, &c.
.
Referring to the arrangement shown at Figs 2 and 3 for horizontal rods,
the oil, etc., collecting in chamber w should not rise higher than the lower
surface of the rod T in order to prevent it from running out of said chamber;
the pipes is accordingly fixed at such a height as to secure this result.
In some cases, both for vertical and horizontal rods, more than a single
chamber and pipe s may be employed, as shown at Fig 4.
The holes which guide the rod Tand the chamber w, can be either bored or
cast in the solid iron or metal, as shown at Figs. 2 and 3, and it is therefore not
necessary to insert a box which contains holes h h¹ and chamber w.
But, on
account of accuracy and other practical purposes, I prefer to use this special
box
T
11
P
1000
HARRIS & MILLS,
23, Southampton Buildings, London, W.C.,
Agents.
Improvements in Means for Guiding and Packing Rods.
I, HUGO LENTZ, Mechanical Engineer, of 14, Gomperzgasse, Bruenn, in the
Empire of Austria, 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 means for guiding rods and forming a tight joint
around the same, thereby doing away with the stuffing boxes heretofore used
for this purpose, and reducing the friction considerably.
The present invention may be applied with advantage in any case where it
is necessary to form a tight joint around rods which are connected to pistons,
plungers, valves, etc., and at the same time reduce the friction, but it is particu-
larly useful in puppet valve engines.
Such valves are generally lifted by the valve gear and closed by springs. In
order to form a tight joint around such a valve rod, stuffing boxes which press
the packing material around the same, are in general use. The friction between
the packing and the rod takes a considerable amount of power to overcome.
Every time such valves are lifted, the engine will not only slacken down, but
by tighening the stuffing boxes too much, or too much one side, the friction produced
may become so great that the spring is not able to seat the valve. When using
a stuffing box that part of the rod which comes into contact with the packing is
worn out much faster than the other parts of the same, and such a worn rod is
very hard to pack and must be renewed.
It is the object of the present invention to overcome these difficulties and
form a tight joint around such rods and also reduce the friction and wear.
I will describe my invention by the aid of the accompanying drawings, in
which:

page_text: Fig. 1 is a vertical section of my rod-guide and packing for a vertically
moving rod, and
Fig. 2 shows a modification.
Like figures represent similar parts in all the figures.
Referring to Fig. 1 the rod T to be guided and packed, has a number of
grooves r, and is guided in the holes h h of box r. Said box has in the centre
a chamber we, and on the exterior an oil cup, which is always kept filled with
oil. Part of rod T enters the space A containing the steam, gas or other
fluid, which is to be prevented from passing around the rod and escaping into the
atmosphere B. When the rod moves up, the part of said rod enters the oil
cup, and on the downward movement carries oil with it, thereby lubricating
said part of rod T. The surplus oil taken along by part of rod T. also
the vapor, water gas etc., rising from space A, collect in chamber w, and this
mixture or fluid lubricates the part of rod T and also fills up the space
and passes between the rod and rod-guide. Pipes entering said chamber carries off
the surplus of the mixture collected therein and to it may be attached a
cock so as to retain a higher level of liquid in the chamber if so desired.
I wish it to be understood that whilst I prefer to use a grooved rod T,
I do not limit myself thereto, and consider the like use of a smooth rod to
be within the scope of my invention. Chamber w can be of any form without
departing from my invention so long as the vapor, water, gas, oil, etc., rising
from space A can collect in the same. This chamber w may be for instance,
a spiral groove which winds around rod T. or it may consist of several holes
which radiate from the rod and are united in a ring-shaped or other formed
chamber, &c.
In some cases both for vertical and horizontal rods
chamber and pipes may be employed, as shown at Fig 4.
more than a single
The holes which guide the rod Tand the chamber w, can be either bored or
cast in the solid iron or metal, and it is therefore not
to insert a box which contains holes and chamber w.
account of accuracy and other practical purposes, I prefer to use this special
box
necessary
But on
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. In means for guiding and packing rods the combination with a fluid pressure
chamber, and a vertically movable reciprocating member therein, of a box or sleeve
mounted upon the upper end of said chamber, and having a concave upper end
forming an oil reservoir, a central opening through said sleeve, a rod passing there-
through and connecting with said reciprocating member for transmitting the
motion thereof, an enlargement of said opening between the ends of said sleeve
adapted to receive vapors, condensed steam and the like, and a pipe leading
from said enlarged portion of said opening for draining the same.
2. In means for guiding and packing rods, the combination with a fluid
pressure chamber, and a vertically movable reciprocating member therein, of
sleeve mounted upon the upper end of said chamber, and having a concave
apper end forming an oil reservoir, a central opening through said sleeve, a rod
assing therethrough and connecting with said reciprocating member for trans-
mitting the motion thereof, annular grooves in said rod, an annular enlargement
of said central opening between the ends of said sleeve, adapted to receive vapor,
condensed steam and the like, and a pipe leading from said annular enlargement
or draining the same.
3) In means for guiding and packing rods the combination with a fluid
ressure chamber and a vertically movable reciprocating member therein, of
box or sleeve mounted upon the upper end of said chamber and having a concave
pper end forming an oil reservoir, a central opening through said sleeve, a rod

page_text: passing therethrough and connecting with said reciprocating member for trans-
mitting the motion thereof; annular grooves in said rod, a plurality of annular
enlargements of said central opening between the ends of said sleeve adapted
to receive vapour, condensed steam and the like and a pipe leading from one
or each of said annular enlargements for draining the same or keeping the fluid
therein at a given level, substantially as herein set forth.
4) In means for guiding and packing rods the combination with the arrange-
ments claimed in Claims 1, 2 and 3 of a cock on the pipe communicating with the
annular enlargement or chamber between the ends of the sleeve, substantially
as herein set forth and for the purpose stated.
Dated this 15th day of February 1900.
HARRIS & MILLS,
23, Southampton Buildings, Chancery Lane, London, W.C.