Year: 1888

page_text: Date of Application, 4th Jan., 1888
Complete Specification Left. 3rd Oct., 1888
Complete Specification Accepted, 9th Nov., 1888
We RILEY HARGREAVES and JAMES BARDSLEY of the Union Brass Works Oldham
in the County of Lancaster Brass Founders and Finishers do hereby declare the nature
of this Invention to be as follows:-
Our Invention relates to the apparatus employed to promote uniformity of gas
pressure by reducing excessive pressures to fixed regulated maximum pressures as is
now well understood. In some forms of such apparatus a lever mounted upon a
fulcrum is employed to compensate for the variation in pressure which would arise
from the less or greater immersion of the floating bell. The object of our invention
is partly to so construct and arrange this lever as that it shall answer a double purpose
-that is to say we make such lever serve as means for regulating the maximum
pressure of the gas delivered as well as for compensating for the variation hereinbefore
referred to. We make the said lever adjustable within a sleeve or saddle which is
mounted upon a fulcrum so that the heavier arm of the lever can be lengthened or
shortened. When applying this part of our invention to the governor for which
Letters Patent dated the sixth of May in the year 1886 and numbered 6134 have
been granted to us we make the said lever hollow and either curved or straight. We
find the straight form convenient as by screwing the outside of the tubular lever and
tapping the sleeve or saddle the adjustment can be readily effected by simply turning
the lever on its axis. A set screw may be used to fix the lever when adjusted. In
place of this method the lever may simply slide in its sleeve and be shifted by hand or
by means of a rack and pinion or of a screwed side rod or by suitable means.
make the regulator serve also as a carburetting apparatus. This we accomplish by
furnishing the lower chamber into which the gas issues with an elbow or filling branch
through which the liquid hydro carbon may be passed into the said chamber the said
elbow when completely filled or when filled to a fixed level determining
the level of the fluid within the said chamber. We prefer to
the said chamber larger than usual so that it will hold a supply of liquid
which will last for a suitable period. In cases wherein it is desirable to furnish
We
nake

page_text: a supply for a longer period we provide a fountain reservoir which is attached to or
connected with the regulator or is formed in one piece with the shell of the regulator
the said reservoir being connected with the gas chamber by means of a passage or of
passages so that when the liquid within the chamber falls to a minimum level gas
can pass into the reservoir and displace a quantity of liquid which will flow into the
chamber. Suitable cocks or valves may be provided to close the passages when
required. The liquid may be introduced into the reservoir through a cock or through
a passage which can be tightly closed by means of a screw plug.
Dated this 3rd day of January 1888

page_text: Improvements in Gas Regulators.
We RILEY HARGREAVES and JAMES BARDSLEY of the Union Brass Works, Oldham,
in the County of Lancaster, Brass Founders and Finishors 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 and accom-
panying drawings:
Our Invention relates to the apparatus employed to promote uniformity of gas
pressure by reducing excessive pressures to fixed regulated maximum pressures as is
now well understood. In some forms of such apparatus a lever mounted upon a
fulcrum is employed to compensate for the variation in pressure which would arise
from the less or greater immersion of the floating bell. The object of our invention is
partly to so construct and arrange this lever as that it shall answer a double purpose
that is to say we make such lever serve as means for regulating the maximum
pressure of the gas delivered as well as for compensating for the variation hereinbefore
referred to. We make the said lever adjustable within a sleeve or saddle which is
mounted upon a fulcrum so that the heavier arm of the lever can be lengthened or
shortened.
Our invention will be most clearly understood when described with reference to the
accompanying drawing which represents a vertical section taken through the centre
of a gas regulator constructed partly in accordance with a former invention for which
Letters Patent dated the sixth of May in the year 1886 and numbered 6134 have
been granted to us and also in accordance with our present invention. In the said
drawing the same letters have been used to indicate certain parts of the apparatus as
appear on the corresponding parts in the drawings attached to the specification of our
said former invention. In the drawing attached hereto a is a tube or tubular chamber
permanently closed at one end and provided at the other end with a screw plug a¹.
Upon the exterior of this tube is formed a screw thread which engages with a thread
formed in a part a² which is hinged or mounted upon a fulcrum and is provided
with a wheel g which bears upon the head n of the valve spindle c.
Within the tube a
we place a fluid. We use mercury as being the most suitable for the purpose. The
mercury is retained by means of the plug a which is screwed into the mouth of the
tube. When the tube is screwed into position in the part a² the parts constitute a
loaded lever which bears upon the head nas in the case of the lever a. a¹ in our said
former invention. In our present invention however the lever is capable of being
adjusted so as to bear less or more forcibly upon the spindle head n.
This adjustment
is effected by turning the tube upon its axis so as to screw it further in or out of the
hole in the part a². In the drawing the tube is represented as extending considerably
past the centre line of the valve spindle so that the lever would bear downward upon
the said spindle with nearly its maximum effect. By turning the tube so as to
decrease this projection the downward pressure upon the valve spindle would be
lessened to any desired extent. The tube can be fixed in its adjusted position by

page_text: means of a set screw t. The lever being loaded with fluid mercury would have the
compensating effect described in the specification of our said former invention
- that is to say-the downward pressure upon the valve spindle would increase
in proportion as the bell would become more immersed and therefore more
buoyant. We have adopted the straight form of screwed tubular chamber because
this form admits of convenient adjustment by rotating the tube but we do not
confine ourselves to the straight form nor to the use of a screwed tube nor to
the tubular formation. In place of the illustrated arrangement the tube or chamber
may be mounted in the part a² so as to slide therein and be adjusted by hand or
by means of a rack and pinion or of a screwed side rod or of adjusting screws
or by suitable means.
We do not confine ourselves to the formation and arrangement
of the gas regulator which the compensating lever a is applied in the example
selected for illustration. In our provisional specification we stated that we proposed
to make the regulator serve also as a carburetting apparatus but we have not
included this part of our invention herein and therefore make no claim in respect
of the same.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
(1) The combination of the adjustable compensating lever with the other parts
of the complete gas regulator substantially as set forth and as illustrated in the
accompanying drawing.
(2) As applied to a gas regulator the compensating lever consisting of the hollow
chamber a to contain a fluid adjustable in the part a² which is mounted upon a
fulcrum and is provided with a wheel which bears upon the head or upper end
of the valve spindle substantially as set forth and indicated.
(3) As applied to a gas regulator a compensating lever consisting of a tube or
chamber to contain mercury or a fluid adjustable in a part which is mounted upon a
fulcrum and is adapted to bear upon the end of the valve spindle with a pressure
which can be varied by adjusting the position of the said tube or chamber the said
fluid having a compensating effect substantially as set forth and indicated.
Dated this 2nd day of October 1888.
DUTTON & FULTON,
1, St. James Square, Manchester,
Agents.