Improvements in Steam Pumps.
Year: 1893

page_text: Date of Application, 1st Apr., 1893
Complete Specification Left, 23rd Jan., 1894-Accepted, 17th Mar., 1894
Improvements in Steam Pumps.
We THOMAS TOWARD, WILLIAM TOWARD and JOHN MEEK St. Lawrence
Iron Works Newcastle-on-Tyne Engineers do hereby declare the nature of this
invention to be as follows :-
This invention has for its object to provide a steam pump, possessing all the
advantages requisite for a first class pumping engine, without having any
objectionable working parts or dead centre.
According to our invention the steam cylinder & the pump cylinder are mounted
as usual in a line, either horizontally or vertically, the pump bucket & piston being
attached to the same rod, the steam being applied to the piston alternately by a
piston slide valve which may be called a compound valve, inasmuch as it not only
reciprocates over the steam ports, & applies the steam to the main piston, but also
by a novel arrangement hereinafter described applies the steam to itself, doing the
work of an auxiliary valve.
The above arrangement consists of a spindle provided with cams passing
transversely through the centre of the piston valve at right angles to its centre
line, this spindle is oscillated by an arm fixed to the piston rod, a connecting rod
and a lever.
The aforementioned cams operate on the piston valve, oscillating it sufficiently
to apply the necessary steam, through suitable ports & steamways alternately, to
move it to & fro without any possibility of a dead centre or stoppage of any kind
taking place, so long as the steam pressure is applied, additional provision also
being made in a tongue attached to the centre of the aforesaid spindle, which
(should the piston slide valve by any means fail to act) reverses it on its usual
stroke thus preventing any possibility of the main piston striking cylinder ends.
Dated this the 30th day of March 1893.
THOMAS TOWARD.
WILLIAM TOWARD.
JOHN MEEK.
COMPLETE SPECIFICATION.
Improvements in Steam Pumps.
We THOMAS TOWARD, WILLIAM TOWARD and JOHN MEEK Engineers all
of St. Lawrence Iron Works in the City and County of Newcastle-upon-Tyne
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 has for its object to provide a steam pump, possessing all the
advantages requisite for a first class pumping engine without having any objection-
able working parts or dead centre. According to our invention the steam cylinder
& the pump cylinder are mounted as usual in a line either horizontally or vertically
the pump bucket & piston being attached to the same rod; the steam being applied
to the piston alternately by a piston slide valve which may be called a compound
valve inasmuch as it not only reciprocates over the steam ports & applies the steam
to the main piston but also by a novel arrangement hereinafter described applies
Price Sal

page_text: the steam to itself doing the work of an auxiliary valve. The above arrangement
consists of a spindle provided with cams passing transversely through the centre of
the piston valve at right angles to its centre line; this spindle is oscillated by an
arm fixed to the piston rod, a connecting rod & a lever. The aforementioned
cams operate directly on the piston valve oscillating it sufficiently to apply the
necessary steam through suitable ports & steam ways alternately to move it to
& fro without any possibility of a dead centre or stoppage of any kind taking place
so long as the steam pressure is applied.
Having reference to the accompanying drawings, the steam enters at S into the
interior of the piston valve P which is oscillated by the cams CC admitting the
steam alternately through proper ports into the spaces behind the piston valve P
thus admitting the steam through the steam ways W to the pump.
Having now particularly described & ascertained the nature of our said inven-
tion & in what manner the same is to be performed we declare that what we
claim is
1st. The method of oscillating the piston slide valve &
TI
THOMAS TOWARD.
WILLIAM TOWARD.
JOHN MEEK.