Year: 1887

page_text: Date of Application, 11th Feb., 1887.
Specification Accepted, 11th Mar., 1887.
I JAMES YATE JOHNSON of 47 Lincoln's Inn Fields in the County of Middlesex
Gentleman 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:-
This Invention relates to an improved injector worked by exhaust steam or live
steam or a mixture or combination of exhaust steam and suitable for supplying water
to steam generators of all descriptions and other similar purposes.
And in order that the said Invention may be fully understood I shall now proceed
more particularly to describe the same and for that purpose shall refer to the several
figures on the annexed sheet of drawings the same letters of reference indicating
corresponding parts in both the figures.
Figure 1 of the accompanying drawings represents partly in section an Injector
constructed according to this Invention and figure 2 is a longitudinal section of the
same.
This Injector is provided with a first cone or nozzle a figure 2 to which the escape
steam or the live steam when such is employed is supplied by a pipe kk and in
passing out of this nozzle draws in water from a water supply pipe forcing this water
into a second or combining cone or nozzle c. The mixture of steam and water issuing
from the cone c is then acted on by a second jet of live steam (that is to say steam
taken directly from the boiler) or exhaust steam according to the pressure in the boiler
to which the water is to be supplied. This second jet of steam is supplied by a pipe d
Figure 1 and forces the mixture into a third cone or nozzle e whence it issues forcing
a second sheet of water supplied through a passage f into a fourth cone or nozzle g.
The area of the passage is adjusted by means of a cock. The said second supply
of water serves to produce a partial condensation in the vein of liquid issuing from
the converging cones or nozzles e and g in order to facilitate its discharge through the

page_text: diverging receiving cone h. An overflow opening is arranged between the last
converging cone g and the diverging cone h.
The passages
and supplying the water form continuations of a pipe T
communicating with a supply pipe A which may be partially divided by a partition a
dividing the pipe T into two parts so as to divide and direct the water to the
passages band f
The partition as indicated in the drawing is so arranged as not to completely
divide the pipe T but allows the water to pass from one side to the other around this
partition. The injector may be provided with central solid cones or regulating spindles
when required to act as an exhausting injector.
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. An injector in which, the water being forced or drawn through the apparatus by
a steam jet is caused to draw in a second supply of water before being discharged into
the diverging or receiving cone the apparatus being provided with two separate water
supply passages and two separate steam supply passages substantially as hereinbefore
described and illustrated in the accompanying drawings.
2. An injector constructed and operating as hereinbefore set forth with two separate
steam inlets and two separate water inlets the water being supplied by one pipe to the
two water supply orifices with or without a partition partially dividing the said pipe
for the purpose of directing or guiding the two streams of water substantially as
hereinbefore described and illustrated in the accompaning drawings.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London,
Agents.