Year: 1894

page_text: JOHN HENRY KNIGHT of Barfield Farnham County of Surrey Engineer and
Landowner do hereby declare the nature of this invention to be as follows:—
In the first part it relates to improvements in engines described in my Patents
2783 of 1887, 6831 of 1889 and 20926 of 1891.
I make the vaporiser with considerably less heat absorbing surface than would be
required if vaporiser be made according to the Specifications above mentioned, and
the additional heat is obtained from the waste heat of the firing lamp.
For this arrangement I place the firing tube alongside the vaporiser and the
waste heat impinges on the side and bottom of the vaporiser, by this means the
vaporiser is kept at a more equable temperature; the vaporiser may be made in any
of the forms described in the above named Specifications.
In another arrangement I make a separate vaporiser preferably of a circular, or
cylindrical shape such as a shallow closed dish, and let the firing tube pass through
an opening in the middle of the vaporiser. This vaporiser is heated entirely by
the waste heat of the firing lamp. It may be fitted with grills or grids on the
lower side to take up more readily the heat from the lamp. Oil and air are caused
to pass in a circuitous manner through the vaporiser by partitions, grills, or grids.
In this arrangement the firing tube can be removed or replaced without disturbing
the vaporiser, or using any special tools.
In a marine engine with two or more cylinders a burst tube could be quickly
replaced, one cylinder only being inoperative for a short period.
This last described vaporiser may be attached to the end of the cylinder and
obtain a portion of its beat from the explosions.
Sometimes 1 pass a portion of the exhaust round the vaporiser.
In order to ascertain if the vaporiser is hot enough to start the engine I place in
a cavity of the vaporiser and in a suitable place, a depression or pocket in which is
a small quantity of a metal or alloy which melts at the temperature at which the
engine will readily start. prefer to use an alloy of lead and tin and bismuth, but
other alloys may be used.
There may be two or more of these pockets, each containing an alloy of different
melting point.
Dated this Tenth day of September 1894.

page_text: D,'nring tube.
In another arrangement I make a separate vaporiser of preferably a circular or
cylindrical shape (but not necessarily so), such as a shallow closed dish, and let the
fring tube pass through an opening in or about the middle of this vaporiser; this
vaporiser is heated entirely by the waste heat of the firing lamp, it may be fitted
with grids or grills on the outer or lower side to take up the heat from the lamp;
and the oil and air are caused to pass in a circuitous manner through the vaporiser
by partitions, grills, or grids.
This arrangement is shewn in Figs. 3 & 4.
E is the vaporiser heated by the lamp B.
F are the partitions so as to cause air and oil which enter by a vertical pipe at
the dotted circle G to pass a considerable distance before leaving the vaporiser.
H is the outlet to the cylinder. J grids or grills below vaporiser to absorb heat
from lamp. K'is the firing tube surrounded muffle L. M cylinder.
In this arrangement the firing tube can be removed & réplaced without requiring
any special tools and without disturbing the vaporiser..
In a marine engine with 2 or more cylinders a damaged tube could be quickly
replaced, one cylinder.only being inoperative for a short period.
This last described vaporiser may be attached to the end of the cylinder and
obtain a portion of its heat from the explosions. This arrangement is shewn in
Figs. 6 & 7.
Sometimes I pass a portion of the exhaust round the vaporiser. This arrange
ment is shewn in Fig. 5. N being the exhaust passage. The reférence letters in
Fig. 5 are the same as in Figs. 3 & 4.
In order to ascertain if the vaporiser is hot enough to permit the engine to be
started, I place in a cavity in the vaporiser & in a suitable place preferably near
the exit of the vaporiser a depression or pocket in which is placed a metal or alloy
which melts at a temperature, at which when reached the engine will readily start.
I prefer to use an alloy of tin and lead in certain proportions, but any suitable
substances may be used. There may be two or more of these pockets to contain
alloys of different melting points. The use of the alloy above mentioned is
not confined to the vaporiser herein described. The pockets are shewn at P in
Figs. 3 & 5.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare what
I claim is
1. Utilizing the waste heat of the firing lamp to heat a vaporiser of a similar
type as described in my Specifications named in the first paragraph.
2. The separate dish shaped vaporiser as described above heated wholly by the
waste heat of the firing lamp.
3. The dish shape vaporiser attached to the end of the cylinder as described
above.
4. The separate or dish shaped vaporiser with a passage for the exhaust round it
as described above.
5. The use of alloys of suitable melting points placed in pockets in the vaporiser
to ascertain approximately the heat of the vaporiser.
Dated this Fourth day of June 1895.
JOHN HENRY KNIGHT.