Injector and Ejector for Improving the Circulation in Hot-water Pipes and Heating Apparatus.
Year: 1896

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c. Act, 1883) as required by
the decision of the Comptroller General of the 13th day of January 1898.
Date of Application, 9th Sept., 1896
Complete Specification Left, 9th June, 1897-Accepted, 17th July, 1897
PROVISIONAL SPECIFICATION.
Injector and Ejector for Improving the Circulation in Hot-water
Pipes and Heating Apparatus.
I, JOHN THOMAS STOKES, of 2, Cromford Road, Wandsworth, S.W., Architect and
Consulting Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to means for improving the circulation in hot water pipes
and heating apparatus consisting of an arrangement of nozzles screwed into or
attached to tees or their equivalents in the mains and forming injectors and ejectors
whereby the circulation of hot water in heaters, radiators, branch pipes or other
apparatus is as aforesaid, considerably augmented.
The accompanying sheet of drawings illustrates my invention in side elevational
view partly in section. It will be observable that though shewn as applied to a
vertical main the invention is equally applicable for use or employment with
horizontal mains.
a a are pipes forming a vertical main which pipes screw into the tee pieces bb.
and d are two nozzles placed with their bores in opposite directions and screwed
nto the tee pieces bb. These nozzles project in accordance with the distance
screwed into the tee to any desirable extent within the main pipe a.
ranch pipes carrying the water from and back to the main which branch pipes are
t one end screwed into the nozzles.
e e are the
The vertical pipes a shewn may be either the flow or return main: in the former
ase the water is guided into the lower nozzle c and forced out of the upper one d
y the upward flow in the main, and in the latter case the water is forced into the
op nozzle and out of the bottom one by the downward or return current.
Dated this 9th day of September 1896.
HUGHES, SON & Co.,
38, Chancery Lane, London, W.C., Agents for the Applicant.
Injector and Ejector for Improving the Circulation in Hot-water
Pipes and Heating Apparatus.
I, JOHN THOMAS STOKES, late of 2, Cromford Road, Wandsworth, and now resid-
ing at "Coningsby," Disraeli Road, Putney, London, S.W., Architect and Con-
[Price 8d.]

page_text: sulting Engineer, 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 means for improving the circulation in hot water pipes
and heating apparatus consisting of an arrangement of noxxles screwed into or
attached to tees or their equivalents in the mains and forming injectors and ejectors
whereby the circulation of hot water in heaters, radiators, branch, pipes, or other
apparatus, is, as aforesaid, considerably augmented, and the water maintained
throughout the service or installation at a uniform temperature, all as hereinafter
fully described, and shewn upon the accompanying sheet of drawings which
illustrates in side elevation (partly in section) two of the aforesaid nozzles attached
to tee pieces in a vertical main one serving as an ejector and the other as an injector.
It will be readily observable that though shewn as applied to a vertical main the
invention is equally applicable for use or employment with horizontal mains, more
particularly where branch pipes are taken off to a lower level and taken to the same
or a higher level and that cast iron mains formed with suitable bosses for the recep
tion of the nozzle may as readily be adapted to the purposes of this invention as
the wrought iron pipe and tee pieces shewn in the drawing. Referring to the
illustration a a are pipes forming a vertical main which pipes screw into the tee
pieces bb.e and d are the two nozzles above referred to (forming the ejector and
injector) and these nozzles are screwed into the tee pieces bb and project, in accord-
ance with the distance the nozzle is screwed into the tee, to a desired extent within
the main pipe a. The nozzles should always face away from each other in the main
as shewn whether on the flow or return main. ee are the branch pipes carrying
the hot water from and back to the main which branch pipes at one end are screwed
into the nozzles.
f and gare regulating nuts screwing respectively upon the nozzle in front of the
collar or flange % of said nozzle and upon the outside of the branch pipes e in rear
of the collar or flange A. By screwing or unscrewing the nozzle is regulated the
distance within the main which the nozzle projects so that the full bore of the
nozzle may be given to the pipe if required or it may be reduced by withdrawing
said bore of nozzle partially within the neck of the tee piece and by shifting the
nuts backwards or forwards the nozzles are locked or firmly secured in their
required position. In the drawings the full bore of the nozzles is shewn as being
given to the main but it will at once be perceived that by the extent to which the
nozzle is allowed to project within the main so may the circulation of the water
be regulated, and the flow controlled.
The vertical pipes a shewn may be either the flow or return main; and in the
former case the water is guided into the lower nozzle c and forced out of the upper
oned by the upward flow in the main, and in the latter case the water is forced
into the top nozzle and out of the bottom one by the downward or return current.
The invention is especially applicable for use with what is known as the "single
pipe system" or that in which the flow return of the heated water take place
in the same main or pipe.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I am aware that it has
previously been proposed to form tee pieces and other connections for use in hot
water circulations with an internal lip to assist in deflecting the water to or from
the branch pipes, and I make no general claim to such connections, but I declare
that what I claim is:-
1. Injectors and ejectors for improving the circulation in hot water pipes and
heating apparatus substantially as shown and described.
2. In injectors and ejectors for improving the circulation in hot water pipes
and heating apparatus, the arrangement and construction of nozzles screwed inte
or attached to tee pieces or their equivalents upon the main, and to the branch

page_text: pipes of the service or installation, substantially as hereinbefore described and
shewn.
3. In injectors and ejectors for improving the circulation in hot water pipes
and heating apparatus the tee pieces ; the nozzles c and d; and the regulating
lock nuts and g; all in combination with the main and branch pipes a and e
and constructed and operating substantially as above set forth and shewn.
Dated this 9th day of June 1896.
HUGHES, SON & Co.,
38, Chancery Lane, W.C, Agents for the Applicant.