Improvements in Injectors.
Year: 1898

page_text: Date of Application, 12th July, 1898-Accepted, 13th Aug., 1898
[Communicated from abroad by INTERNATIONAL SPECIALITY COMPANY, a corpora-
tion organized under the laws of the State of Michigan, and having its place
of business at the corner of Seventh and Abbott Streets, in the City of Detroit,
State of Michigan, United States of America.]
Improvements in Injectors.
I, HENRY HARRIS, LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45, Southampton Buildings, in the County of Middlesex, 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: -
The invention consists in the construction of the steam end of an injector, com-
prising a steam jet which can be adjusted longitudinally to or from the lifting
tube, so as to adapt the injector to lower or higher steam pressures, with means
for holding the jet at its adjusted position, which means are simple, and do not
increase the expense of the machine.
To this end the invention consists in the construction, arrangement and com-
bination of the various parts, all as more fully hereinafter described.
In the drawing, is shown an elevation of an injector casing, the steam end
being shown in vertical central section, the position of the steam jet being shown
by full and dotted lines.
A is the injector casing, which is provided with the usual steam and water inlets,
discharge and overflow connections required in an injector, and with the usual
lifting and delivery jets as required to work in connection with the steam jet B.
The interior of the casing, at the steam end, is provided with a screw threaded
portion C, which terminates in a shoulder D. The steam jet B is provided with
the collar E, exteriorly screw threaded, and adapted to engage with the screw
threaded portion C in the casing.
F is a ring, adapted to embrace the top of the steam jet, and exteriorly threaded
to engage with the screw threaded portion C described. This ring is
preferably flanged, the flange being adapted to be screwed up against
a shoulder G, and provided with suitable spanner holes or shoulders so that it may
be removed. The steam jet is likewise provided with projections or recesses such
as shown at H, so that without taking it out of the machine, it may be turned for
the adjustment hereinafter described.
The parts being constructed, as described, it will be seen that there is some-
thing of a space or distance between the lower end of the ring, and the shoulder D,
in which the collar E is located, and that the collar is narrower than this space,
so that by turning the steam jet, it may be given an endwise adjustment until it
strikes either the end of the ring or the shoulder D.
It frequently happens in sending out an injector that the user finds that he is
obliged to use it at steam pressures for which the injector is not adjusted, and for
which, no means are provided for adjusting it positively, and without the use of
hand manipulated valves. He is therefore obliged, in order to get the service
required, to buy a new machine.
By this construction, in case the machine is sent out with the jet screwed down

page_text: so that the collar E is locked against the shoulder D, we will say that it is adapted
to work up to the pressure of 150 pounds. If that is the service required, nothing
is necessary to be done to the machine but connect it up and use it. But if it is
desired to use it at, say 175 lbs. pressure, the engineer has simply to disconnect
the machine, turn the steam jet outward to a stop, that is, until the collar E strikes
the lower end of the ring F, and connect it up again, when the machine is adapted
for this new range of steam pressures. The different adjusted positions of the
jet are shown in full and dotted lines.
It is deemed desirable to have, this adjustment within the machine for several
reasons, first, by having it as described there is no question of the proper amount
of adjustment or manipulating. Second, the engineer has no means to adjust it
from the outside, so that ignorant men will not ordinarily make the wrong adjust-
ment, and third, no packing boxes are required for a valve stem, and the cost of
the machine is not materially increased.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed as communicated to me by
my foreign correspondents I declare that what I claim is:-
1 In an injector, the combination of a casing, a steam jet having a limited,
longitudinal screw threaded adjustment in the casing, two shoulders formed at
opposite ends of the adjusting movement of the jet against which it may be turned
to lock it, the outer shoulder being detachable.
2 In an injector, the combination of a casing, a steam jet having a screw threaded
engagement within the casing, two shoulders which limit the adjusting movement
of the jet and against which it may be turned to lock it, an exteriorly screw threaded
ring fitting around the jet and engaging a screw thread in the casing, forming
the outer shoulder.
screw
3 In an injector, the combination of the casing, an interiorly screw threaded
portion at the steam end, a shoulder at the end thereof, a steam jet, a screw threaded
collar on the steam jet engaging said screw thread in the casing, and a
threaded ring fitting over the jet and engaging the screw thread in the casing, the
collar on the jet adapted to be locked. against the shoulder at the inner end of its
movement or against the ring at the outer end of its movement.
100
1
T 1
1000
HASELTINE, LAKE & Co.
45, Southampton Buildings, London, W.C., Agents for the Applicant.