559 
STEAM 
has a thread out at the end, by means of which, and the ad¬ 
justing nut, i, the cylinder, if worn at the two ends can 
be easily tightened and adjusted. The adjusting nut is con¬ 
fined by the collar, k, which collar is screwed to the outer 
case. The conical shape of the small runner, which can 
likewise be removed upwards or downwards in the outer 
case, serves to keep the two convex surfaces of the cylinder 
and cone in contact; so that no steam can escape between 
them. Mr. Eve conceives that from the conical shape of the 
runner, the longer the engine will be in use the better it 
will work, and the more steam-tight it will become. 
By referring to fig. 4, which presents a longitudinal view 
of the conical runner, it will be seen that the groove, d, is 
cut into a separate piece of metal, which slides by an adjust¬ 
ing screw up and down in the empty space, x, so that when 
the engine is adjusted, the groove or the piece of metal into 
which the said groove is cut, can be moved up and down, 
so as to fit the wings of the cylinder by means of the adjust¬ 
ing screw, o. Two cog-wheels running into each other, are 
attached on the outside of the engine to the axis of the cy¬ 
linder and oone, and are placed there for the purpose of 
producing a corresponding revolution of the said cylinder 
and cone, causing the groove of the cone to present itself 
regularly to the wings of the cylinder, o is a pinion, fixed 
to the other end of the axis, by means of which any machi¬ 
nery can be put into motion. 
Mr. Eve has given a descriptions of two other modes of con¬ 
struction, founded on the same principle as the preceding ; 
by means of which the power gained may be doubled, by 
the application of a double quantity of steam, but without 
any material augmentation in the size of the engine. 
II. The Steam Generator. —Fig. 5 is a side view of the 
generator, a, the lower conduit pipe; b the steam receiver; 
c c are two pipes in which the water descends from the steam 
receiver to the lower or conduit pipe ; d is the dome con¬ 
nected with the steam receiver, from which dome the steam 
enters into the steam-pipe, r, and into pipe e, which 
latter leads to the safety apparatus: gggggggggg are 
ten pipes which communicate with the lower conduit pipe, 
and the upper pipe or steam receiver, p is the grate and fire 
place, over the middle of which the smaller combination of 
pipes are placed: o o is the ash-pit; q is an end which 
screws into the lower conduit pipe, by means of which the 
same may be cleaned out when necessary ; the number of 
sections, number of pipes composing each section, and the 
manner in which the pipes are bent, is arbitrary. The gene¬ 
rator or boiler is fed with water through the orifice o. The 
heat of the furnace will cause the water to circulate con¬ 
stantly through the tubes, thereby preventing the steam from 
driving the water out of them, and by which means they are 
in a great degree, prevented from burning out or oxidating. 
The tubes are from i to j inch thick, and 1 and 2 inches 
diameter; they may be of copper, iron, or any other metal 
which is sufficiently strong to hear the pressure. The pres¬ 
sure will be comparatively small, on account of the small size 
of the pipes, although steam of the highest pressure be used. 
Mr. Eve’s horizontal pipes are lj inch thick, and 9| inches 
diameter; the vertical pipes £ inch thick, and inches dia¬ 
meter. To the orifice of each of the section pipes, where 
they enter into the horizontal tubes, there are valves attached, 
so that in case of a rupture in one of the sections to which 
they belong, the unbalanced pressure of steam will force the 
water so rapidly into the particular section that is ruptured, 
as to cause the valves to close, thereby preventing any waste 
of steam, and detaching the ruptured section from the rest of 
the generator, whereby the engine need not be stopped, but 
will only lose so much of its power as the proportion of one 
section to the remaining sound ones would be. The two 
large vertical, as well as the two large horizontal tubes, are 
imbedded in brick-work, and the sections only are exposed 
to the heat of the fire ; it is, therefore, inferred, that no steam 
will be found or generated in the former, while the action of 
the fire will cause the steam and water to ascend rapidly 
through the small pipes into the steam receiver, while the 
water in the steam receiver, being heavier than the water 
ENGINE. 
combined with steam in the smaller pipes, will descend 
through the vertical tubes into the lower conduit pipe, 
thereby causing a continual circulation through all the tubes, 
great and small. The steam will of course accumulate at the 
top, and through the dome find its way to the steam-pipe 
and safety apparatus. In case the circulation should be too 
rapid; and to prevent the possibility of the water being forced 
into the steam-pipe before it descends again into the vertical 
pipes, Mr. Eve has placed a piece of sheet iron, perforated 
with small holes, similar to a strainer, in the middle of the 
steam receiver, all across from end to end. 
III. The revolving cocks, by which the generator is 
supplied with water, are explained by fig. 6. n, is a vessel 
filled with water, of any convenient shape, one side of which 
vessel is near the furnace, so as to keep the water warm. A 
tube at O connects this vessel with the generator, and this 
tube has two revolving cocks, K and L, with a chamber, in, 
between them. The cocks are made to revolve equally by 
cog wheels gearing into each other; so that, if cock K is 
open towards the water reservoir, cock L will be closed to¬ 
wards the tube leading to the generator. The chamber be¬ 
tween the cocks, will, therefore, be filled with water through 
the cock, L. By that time cock K, closes, and L opens to¬ 
wards the generator; the water in the chamber will then 
descend through O, into the generator, by its own gravity, 
and its place be occupied, in the chamber, by steam from 
the generator. Cock K, opens again towards the chamber, 
and L is closed towards the generator; the steam in the 
chamber will be condensed by the water now entering, or 
escape into the water reservoir, n. This revolution will go 
on continually. If water be presented by cock L, to the 
generator, and the said generator should be sufficiently full, 
the water being up to the dotted lines, in such a case the 
water will not be received, but remains in the chamber until 
part or the whole is wanted, the cocks constantly revolving. 
By this arrangement, the water can be kept constantly at the 
desired height. 
IV. The Safety Apparatus. —Figs. 7, 8, 9, 10, eluci¬ 
date Mr. Eve’s improvements in the safety apparatus, as ap¬ 
plicable to his tubular circulatory steam generator, or to any 
other boiler where high or low pressure steam is generated. 
Fig. 5, shows a longitudinal section of the compound tube: 
a, is the piston rod, screwed into the piston, b, which piston 
fits into the cylindrical tube, e, screwed or otherwise fixed at 
its base into the pipe that connects it with the steam receiver 
or boiler. 0 is a hole perforated through b, to allow the 
steam to ascend into the hollow space, n, above the piston, 
so that the pressure is equal on both sides with the exception 
of the piston rod, the diameter of which alone, is unbalanced. 
The piece, h, screwed into the upper part of the tube e, pre¬ 
vents the steam from ascending higher; another piece, gg, 
having a hollow space on the top, is screwed into h. Both 
these pieces have a hole bored in their centre, lengthways, of 
a diameter equal to the piston rod, a, and to allow it to work 
up and down. The hollow space, i i, in the middle of the 
two pieces, g and It, is filled with packing so as to prevent 
any escape of steam along the piston. The hollow space, p, 
at the top, is filled with oil; K K is a bason, with water up 
to the dotted line, to keep the upper part cool, the weights, 
with which the safety apparatus are intended to be loaded, 
are placed on the collar, m. The hollow tube, e, has longi¬ 
tudinal openings, as will be perceived by fig. 7, which pre¬ 
sents an outside front view of the apparatus, and through 
these openings the steam escapes whenever the piston, b, 
rises. These holes may be of an indefinite length and 
breadth; a jacket, F, represented by fig. 6, which fits over 
the tube, e, and has likewise the same number of longitudi¬ 
nal holes cut through it, slides over the said tube, and by 
adjusting this jacket at X, the channel for the escape steam 
can be made narrower, accordingly as it may be desirable 
to have the piston rod raised more or less. The hollow ves¬ 
sel, L L, or a vessel of any other form, slides or is otherwise 
fixed over the lower part of the apparatus, so as to intercept 
the steam from incommoding the upper part of it where the 
rod is loaded. The pipe, q, leads from this hollow vessel, L 0 
