Year: 1893

page_text: This invertion relates to certain new and useful improvements in staam_engines,
but more particularly is it designed as a motive power for steamers and yachts
where it is desirable that the weight of the motor should be placed as low as
possible and where space is important; and with these ends in view my invention
consists and resides in the construction and combination of elements hereinafter
fully to be explained and then recited in the claims.
In order that those skilled in the art to which my invention appertains may fully
understand its construction and method of operation, I will describe the same in
detail, reference being had to the accompanying drawings which form a part of this
Specification, and in which,
Figure 1 is a plan view.
Fi
Figure 2, a side elevation.
Figure 3, a transverse section on the line - of Figure 1.
Figure 4, a vertical section on the line - of Figure 1.
Figure 5 longitudinal section on the line 1
Figure 6, a section on the line y—y of Figure 1.
Figure 1, sad,
The same numerals denote the same parts in each of the figures.
The main shaft, which, in a steamer, supports and drives the propeller, is denoted
by 1, and this shaft is hung in bearings 2 which are suitably arranged. 3 is the
main driving crank. In the drawings I show a compound steam engine consisting
of two cylinders 4 and 5 of high and low pressure respectively and connected in
tandem. Each of thoso has a steam chest 6 containing the valve 7, as shown at
Figure 6. The valve in each of these steam chests is preferably of the construction,
and operated by the means, which are shown and described in a certain application
No. 2163 for Letters Patent for improvement in valve gears filed by me on even
date herewith. As in this engine it is applied in substantially the same manner as
in the previous application, further description is unnecessary.
The two cylinders just described drive the piston rod 8 upon whose end is a
cross bead 9 having therein a slide way transverse to the length of the piston rod,
as is shown in the section Figure 4. This slide way contains the pivotally connected
ends of two levers 10 and 11, the bolt connection between them being designated
by the numeral 12, as also appears at Figure 4. In the top and bottom sides of
the cross head 9 are formed grooves 13 into which are fitted upper and lower
ways 14 and 15 for the guidance and support of said cross head. As is shown at
Figure 1, the outer end of the lever 10 is fulcrumed to the bed of the machine,
which in each of the larger figures is designated by the letter A. The outer ond
of the lover 11 is fulcrumed by means of a pivotal connection 16 to a sliding
hend 17 whose inner side is gibbed to and adapted to slido on a way 18. To this
part 17 is connected the driving pitman 19 whose outer end operates the crank 3
on the main shaft 1.
By the rociprocatory movement of the piston rod 8 the cross head 9 receives n
longitudinal movement in its bearings 14, 15, and in a straight line. When the
outward movement of this cross head occurs it of course tends to straighten the
levers 10 and 11. If the outer ends of both of these were free to move they would
separate after the manner of an ordinary knuckle joint, but as the outer end of the
lever 10 is incapable of movement oxcept about its fulcrum, the head 17 is moved
Figure 6, a section on the line 3-y of Figure 1.
The same numerals denote the same parts in each of the figures.
The main shaft, which, in a steamer, supports and drives the propeller, is denoted
by 1, and this shaft is hung in bearings 2 which are suitably arranged. 3 is the
main driving crank. In the drawings I show a compound steam engine consisting
of two cylinders 4 and 5 of high and low pressure respectively and connected in
tandem. Each of those has a steam chest 0 containing the valve 7, as shown at
Figure 6. The valve in each of these steam chests is preferably of the construction,
and operated by the means, which are shown and described in a certain application
No. 2163 for Letters Patent for improvement in valve gears filed by me on even
date herewith. As in this engine it is applied in substantially the same manner as
in the previous application, further description is unnecessary.
The two cylinders just described drivo the piston rod 8 upon whose end is a
cross bead 9 having therein a slide way transverse to the length of the piston rod,
as is shown in the section Figure 4. This slide way contains the pivotally connected
ends of two levers 10 and 11, the bolt connection between them being designated
by the numeral 12, as also appears at Figure 4. In the top and bottom sides of
the cross head 9 are formed grooves 13 into which are fitted upper and lower
ways 14 and 15 for the guidance and support of said cross head. As is shown at
Figure 1, the outer end of the lever 10 is fulcrumed to the bed of the machine,
which in each of the larger figures is designated by the letter A. The outer ond
of the lover 11 is fulcrumed by means of a pivotal connection 16 to a sliding
bend 17 whose inner side is gibbed to and adapted to slido ou a way 18. To this
part 17 is connected the driving pitman 19 whose outer end operates the crank 3
on the main shaft 1.
By the reciprocatory movement of the piston rod 8 the cross head 9 receives a
longitudinal movement in its bearings 14, 15, and in a straight line. When the
outward movement of this cross head occurs it of course tends to straighten the
levers 10 and 11. If the outer ends of both of these were free to move they would
separate after the manner of an ordinary knuckle joint, but as the outer end of the
lever 10 is incapable of movement oxcept about its fulcrum, the head 17 is moved
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page_text: along its way, and the joint between the two levers moves slightly in its bearing in
the cross head 9. The back and forth movement of the head 17 through the
pitman 19 in parts rotative movement to the shaft 1.
By the arrangement of the parts herein shown and described, not only is a motor
produced which has no upwardly projecting parts and is therefore particularly
adapted to be placed in the hold of a vessel or launch, but the movement of the
piston is parallel with the line of the main shaft and therefore with the longth of
the vessel, and this is important as it greatly reduces the vibration. Furthermore.
the interposition of the levers 10 and 11 apply the power very advantageously
to the shaft.
I do not wish to be confined to the precise arrangement of parts herein shown
and described, since these may be combined in various other ways without departing
from the spirit and aim of my invention as set forth in the claims.
I have shown two cylinders in a certain specific arrangement and provided with
a special form of valve gear hereinbefore referred to, but these are uot essential to
my invention, and other forins may be substituted in their place.
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. The combination with the piston rod, of the guided cross head having therein
a transverse slide way, the levers 10 and 11 fulcrumed together and guided in the
cross head, a sliding head 17 operated at right angles to. the length of the piston by
one of said levers, and a pitman connecting said "head to the main shaft crank, the
whole arranged as described and for the purpose set forth.
2. The combination with the piston rod and means for driving the same, of the
cross head 9 guided in ways in the line of the piston stroke and having a transverse
slide way arranged therein, the lever 10 fulcrumed to the base, the lever 11
fulcrumed to the lever 10, and the joint arranged to have movement in the cross
head, the slide head 17 carried by the lever 11, and the pitman 19 whereby the
main shaft is driven, the whole arranged substantially as and for the purpose
specified.
3. The piston rod arranged parallel with the driven main shaft, in combination
with aaid shaft, and interposed connections substantially as described, whereby said
shaft is revolved by the reciprocating movement of said piston rod.
Dated this 31st day of January 1893.
GEO. H. RAYNER,
.37, Chancery Lane, London, W.C., Agent for the Applicant.