Year: 1887

page_text: Date of Application, 3rd May, 1887
Complete Left, 3rd Feb., 1888.
Complete Accepted, 3rd May, 1888
We, JULES BUREAU and HENRI HENDLE, Engineers, both of 95 Boulevard Beau-
marchais, Paris in the Republic of France, do hereby declare the nature of this inven
tion to be as follows:-
The present invention relates to improvements in steam motors with oscillating
piston rods in which the latter are connected directly to the crank. These
improvements enable a type of machine to be used which avoids the defects of
this class of machine which prevented them from being of any practical and
industrial use.
The type of direct acting machine, forming the subject of the present application
possesses a combination of elements novel in a machine of this class.
The guiding of the piston as described in our British Patent 9753 of 1886, is one of
the principal features of this arrangement, because the piston, not being guided by a
rigid piston rod, has great liberty of movement without any oblique displacement the
consequence of which would be the binding of the piston resulting in escape of steam
and sometimes grave accidents.
In the slide on the cylinder cover several improvements have been made. In the
thickness of the cylinder cover are cut grooves in which are placed bronze rings
having a groove round their circumference in which are placed indiarubber rings.
These bronze rings are strongly pressed against the slide by suitable springs thus
preventing any escape of steam between the slide and the cylinder cover while the
indiarubber rings act as packing and press the bronze rings against the walls of the
grooves thus preventing any escape of steam around the bronze rings.
This arrangement also permits of efficient lubrication of the slide as the lubricant is
retained between the rings and cannot escape.
To the sides of the slide are fixed bronze wearing plates which reduce friction and
also the wear as they are easily replaced when necessary.
An important improvement in this application is the present construction of the
socket and ball joint of the piston rod and the stuffing box. In the above cited

page_text: specification the socket itself worked directly against the metal of the ball while now
the socket is lined with bronze, which lining reduces the friction and is also easily
replaced when necessary.
To free the slide from the piston rod without having to take the piston out as
was necessary in the above named specification, the head of the piston rod is made
detachable, so that the stuffing box may be slid off the piston rod without removing the
piston itself.
Lastly to gain room and still to allow the eccentric rods of the reversing
gear sufficient length, the reversing link is attached to a rod guided in slides on
the valve box and connected to the valve rod by an arm. Longer eccentric rods
can thus be used.

page_text: Improvements in Steam Motors.
We, JULES BUREAU and HENRI HENDLE both of Paris, in the Republic of France,
Engineers, do hereby declare the nature of this invention and in what manner the same
is to be performed, be particularly described and ascertained in and by the following
statement:
The present invention relates to improvements in steam motors with oscillating
piston rods in which the latter are connected directly to the crank the cylinders being
fixed. These improvements enable a type of machine to be used which avoids the
defects of this class of machine which prevented them from being of any practical and
industrial use.
The type of direct acting machine forming the subject of the present application
possesses a combination of elements novel in a machine of this class.
In the accompanying drawings
Figure 1 represents an elevation of the motor, the cylinder being in section.
Figure 2 represents the arrangement at the bottom of the cylinder permitting the
adjustment of the ball and socket joint at the lower end of the piston rod and of the
stuffing boxes for the guide rods of the piston.
Figure 3 is a plan of the cylinder cover with its slide.
Figure 4 is the same without the slide showing the steam tight packing.
Fig. 5 is a section of one of the oblong bronze rings constituting the said
packing.
Fig. 6 is a detail of the head of the piston rod.
Figures 7 and 8 are details of the reversing gear.
The guiding of the piston as described in our British Patent 97538 is one of the
principal features of this arrangement, because the piston not being guided by a rigid
piston rod has great liberty of movement without any oblique displacement the
consequence of which would be the binding of the piston resulting in escape of
steam and sometimes grave accidents. By this system of guiding the piston by
means of rods K fixed to the cylinders covers and passing through suitable stuffing
boxes M in the piston B the latter is always held in its proper position and its proper
action is thereby assured.
In the slide in the cylinder cover several improvements have been made. In the
thickness of the cylinder cover are cut grooves into which are placed oblong bronze
rings J having a groove round their circumference for the reception of india
rubber rings. These bronze rings are strongly pressed against the slide G by
suitable springs thus preventing any escape of steam between the slide and the
cylinder cover while the india rubber rings act as packing and press the bronze
rings J against the walls of the grooves thus preventing any escape of steam around
the bronze rings.
This arrangement also permits of efficient lubrication of the slide as the lubricant is
retained between the rings and cannot escape.

page_text: To the sides of the slide are fixed bronze wearing plates R which reduce friction
and can be easily replaced when worn.
An important improvement in this application is the present construction of the ball
and socket joint of the piston rod C and the stuffing box I.
In the above cited specification the balls worked directly against the metal of the
sockets while now the sockets are lined with bronze H and D which lining reduces the
friction and is also easily replaced when worn.
To adjust the lining of the ball and socket joint of the piston rod in case
of wear without taking the machine to pieces the following arrangement has been
made.
A key provided with a suitable handle passes through a stuffing box in the bottom
of the cylinder. The end of this key is square and fits into a square recess formed in
the plate E screwed into the piston B on which plate rests the lower lining D of the
ball and socket joint. When it is noticed that the lining has become loose the machine
is stopped the piston brought to the bottom of the cylinder and the square end of the
key pushed into the corresponding recess of the plate E. This is then screwed further
into the piston thereby raising and tightening the lining.
To detach the slide from the piston rod when necessary without having to take the
piston out as was necessary in the above named specification the head of the piston
rod is made detachable so that the stuffing box may be slid off the piston rod without
removing the piston itself. This is done simply by removing the key or cottar
connecting the head of the piston rod to the piston rod.
.
Lastly to gain room and still to allow the eccentric_rods Q of the reversing gear
sufficient length the reversing link is attached to a rod U guided in slides on the valve
box V and connected to the rod of the valve W by an arm X. Longer eccentric rods.
can thus be used.
To enable the length of the eccentric rods to be still further increased the valve
rod may pass through the bottom of the valve box and the eccentric rods suitably
connected therewith.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. In a motor such as described the combination with a cylinder having a sliding
stuffing box of a piston having a detachable head which may be disconnected in
order to allow the stuffing box to be slid off the piston rod without removing the piston
itself substantially as specified.
3. In a motor with oscillating piston rod which passes through a slide in the cover
of a fixed cylinder and is connected directly to the crank the combination of the
oblong metallic rings provided with india rubber rings in peripheral grooves and
arranged under the slides bearing thereon to prevent escape of steam, the removable
anti-friction plates R in the slide, the removable anti-friction pieces H for the stuffing
box I of the piston rod, the removable anti-friction pieces D for the ball and socket
joint of the piston rod one of these pieces being adjustable by means of a suitable
key passing through a stuffing box in the bottom of the cylinder and adapted to
engage in a recess formed in a plate E screwed into the piston which plate bears upon
one of the said pieces, the head of the piston rod which can be detached from the
piston rod, the system of rods connecting the reversing gear with the valve; the whole
substantially as and for the purpose specified.