Improvements in and appertaining to Gas Bags for Gas Engines.
Year: 1892

page_text: Date of Application, 1st Feb., 1892
Complete Specification Left, 1st Nov., 1892-Accepted, 3rd Dec., 1892
. PROVISIONAL SPECIFICATION.
Improvements in and appertaining to Gas Bags for Gas Engines.
We, TO, BIRKETT BARKER, Engineer, of the firm of T. B. Barker and
Company, Scholefield Street, and ENOCH ROLLASON, of 12 Taylor Street,
Engineer, both in the City of Birmingham; do hereby declare the nature of this
invention to be as follows:-
...Our invention relates to improvements in the arrangements and construction of
gas engine gas bags and the valve and other details appertaining to such bags;
and our object is to produce an effective, simple, and inexpensive apparatus which
shall also act as an antifluctuator.
One part of our invention relates to a novel type of valve which is particularly
applicable to gas bags of all kinds. Que form of our new valve consists of a close
coiled spiral spring attached at one end to the pipe or aperture supplying gas
within the gas bag and closed at the end projecting within the said gas bag. When
the spring is straightened out the gas from the pipe fills the hollow within the
spring, but is practically prevented from passing between the wires because of
their close contact. One end, the free end of a spring is attached to a flexible
side of the bag so that when the side is distended by the gas pressure within, the
spiral spring is bent over from its naturally straight position. This bending over
opens the coils so that gas can escape between the wires and so the gas supply is
allowed free access to the gas bag.
..
Whenever the engine takes its charge the pressure within the bag is reduced
and the distended side of the bag collapses and flattens and so allows the spring to
straighten and close up the coils, thus preventing the access of gas to the bag
and preventing the fluctuation of pressure within the gas supply pipes. The coils
although practically closed are not closed to be absolutely gas tight so that gas
slowly passes through and slowly distends the flexible side or sides again when
the suction stroke of the engine ceases. The gas discharge area into the gas bag
is gently increased with the distension of the flexible side or sides, so that when
fully extended the discharge area is at its maximum. At the same time should
the engine suction continue to take away gas faster than the gas can be supplied
to the bag the flexible side or sides will become concave and bend the spring valve
from the straight position in a reverse direction and so the gas will continue to flow
into the gas bag.
Instead of a spring with a free end we may employ a closed coil spiral spring
passing from the end of the gas inlet pipe across the gas bag casing and attaching
to the gas bag casing at the opposite side. The spring is thus held at both ends,
and the gas supply passes within it, but the gas bag side is attached to it at some
intermediate point, and when distended the coils are opened, but when the surface
becomes too concave the coils are again opened on the reverse side; in the straight
position the coils are closed.
The single spiral spring may also be arranged to open and close by pulling out
or pushing in the spiral, but this arrangement has only the single action effect and
does not open to gas supply when the bag flattens too much.
A conical spiral spring may also be used as valve and act in a similar manner
while the double action may be secured in such a spring valve by using a double
conical spring, an outer and an inner cone, so coiled that when one spring is in
compression the other is in extension..
Cylindrical out and inner spirals may also be used, and likewise combination of
cylinders and cones.

page_text: Another part of our invention relates to the arrangement and construction
of the gas bag casing and to the mode of attaching the flexible side to the metal
casing. In a gas bag constructed in accordance with this part of our invention we
arrange a cast iron open sided casing of suitable capacity, and we cast into it
suitable inlet and exit gas pipes. The inlet pipe projects within the casing clear
of its side and is screwed or otherwise arranged to receive a cap to close in the
inner end; to this cap we attach our spiral spring valve passing the end through
a suitable aperture in the said cap. The outer or free end of the spiral spring we
close up in any suitable manner and attach by a metal tag or lug to the flexible
rubber or other flexible side of the gas bag, securing it by riveted plates or screw
nut and washer to the said flexible side.
We attach the flexible side to the casing in the following novel manner-We
arrange a recess in the metal of the casing and fit to this recess a metal ring
preferably steel and of preferably round section, although other sections may also
be used. The ring is cut and expanded to spring into the said recess and press
outwards all round the recess. We place the flexible side in position over the open
side of the casing, slip in the ring and so clip the rubber by the expanding ring in
the said recess.
To make certain that a gas tight joint is produced we paint the
recess and the flexible material edge with rubber solution. We thus obtain a
perfectly effective gas tight and antifluctuator gas bag in a very inexpensive
manner.
An essential feature of one part of our invention lies in the spring valve and the
numerous small openings between the coils are found to have a most remarkable
effect in preventing fluctuations of pressure in the gas pipes.
Instead of a spiral spring an india rubber tube may be used with cuts in its
sides which close on straightening the tube and open on bending it.
Dated this 30th day of January 1892.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in and appertaining to Gas Bags for Gas Engines.
We, TOM BIRKETT BARKER, Engineer, of the firm of T. B. Barker and Company,
Scholefield Street, and ENOCH ROLLASON, of 12, Taylor Street, Engineer, both in
the City of Birmingham, 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 :-
Our invention relates to improvements in the arrangements and construction of
gas engine gas bags, and the valve and other details appertaining to such bags; and
our object is to produce an effective, simple, and inexpensive apparatus which shall
also act as an antifluctuator.
One part of our invention relates to a novel type of valve which is particularly
applicable to gas bags of all kinds.
In the accompanying sheet of explanatory drawings,
Figure 1 is a sectional elevation of one form of our new valve consisting of a
close coiled spiral spring A. attached at one end to the pipe or aperture B supplying
gas within the gas bag C and closed at the end A' projecting within the said bag.
When the spring is straightened out the gas from the pipe fills the hollow within
the spring but is practically prevented from passing between the wires because of
their close contact. One end, the free end A¹ of the spring is attached to a flexible
side C¹ of the bag so that when the side is distended by the gas pressure within,
the spiral spring is bent over from its naturally straight position. This bending
over opens the coils so that gas can escape between the wires and so the gas supply
is allowed free access to the gas bag.

page_text: Whenever the engine takes its charge the pressure within the bag is reduced
and the distended side of the bag collapses and flattens and so allows the spring to.
straighten and close up the coils, thus preventing the access of gas to the bag and
preventing the fluctuation of pressure within the gas supply pipes. The coils
although practically closed are not closed to be absolutely gas tight so that gas
slowly passes through and slowly distends the flexible side or sides again when the
suction stroke of the engine ceases. The gas discharge area into the gas bag is
gently increased with the distension of the Hexible side or sides so that when fully
extended the discharge area is at its maximum. At the same time should the engine.
suction continue to take away gas faster than the gas can be supplied to the bag
the flexible side or sides C will become concave as shown in Figure 2 and bend
the spring valve A from the straight position in a reverse direction and so the gas.
will continue to flow into the gas bag.
Instead of a spring with a free end we may employ a closed coil spiral spring
passing from the end of the gas inlet pipe across the gas bag casing and attaching
to the gas bag casing at the opposite side. The spring is thus held at both ends
and the gas supply passes within it but the gas bag side is attached to it at some
intermediate point, and when distended the coils are opened but when the surface
becomes too concave the coils are again opened on the reverse side; in the straight
position the coils are closed.
The single spiral spring E may also be arranged to open and close by pulling.
out or pushing in the spiral as shown in sectional elevation at Figure 3, Figure 4
being a semi end elevation of the case I there adopt ;-the flexible side C³ being
attached to a lever F having an arm or end F¹ to press against the coil spring E.
A conical spiral spring may also be used as valve and act in a similar manner
while the double action may be secured in such a spring valve by using a double
conical spring, an outer and an inner cone, so coiled that when one spring is in
compression the other is in extension. Cylindrical out and inner spirals may also
be used and likewise combinations of cylinders and cones.
Another part of our invention relates to the construction and arrangement of
the gas bag casing and to the mode of attaching the flexible side to the metal
casing. In a gas bag constructed in accordance with this part of our invention and
as shown in sectional elevation at Figure 5 and in front elevation at Figure 6, we
arrange a cast iron open sided casing H of suitable capacity and we cast into it.
suitable inlet and exit gas pipes, H, H. The inlet pipe H₁ projects within the
casing clear of its side and is screwed or otherwise arranged to receive a cap to
close in the inner end, or it is cast with a solid end; to this cap or within this end
we attach our spiral spring valve K, passing the end through a suitable aperture h
in the said cap or end; the outer or free end of the spiral spring K we close up
in any suitable manner and attach by a metal tag, lug or bar to the flexible rubber
or other flexible side L of the gas bag, securing it by riveted plates k or by a
screw nut and washer to the said flexible side L.
We attach the flexible side to the metal casing in the following novel manner-
We arrange a recess H³ in the metal of the casing and fit to this recess a metal
ring M preferably steel and preferably of round section although other sections also
may be used. The ring is cut and expanded to spring into the said recess and
press outwards all round the recess. We place the flexible side L in position
over the open side of the casing, slip in the ring and so clip the rubber by the
expanding ring in the said recess. To make certain that a gas tight joint is
produced we paint the recess and the flexible material edge with rubber solution.
We thus obtain a perfectly effective gas tight and antifluctuator gas bag in a very
inexpensive manner.
An essential feature of one part of our invention lies in the spring valve and
the numerous small openings between the coils are found to have a most remarkable
effect in preventing fluctuations of pressure in the gas pipes.
Instead of a spiral spring an india-rubber tube may be used with cuts in its
sides which close on straightening the tube and open on bending it.

page_text: 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 construction of gas bags in which a flexible spring or tube is employed
to open and close apertures formed in the tube or formed by the intervals between
the coils of the spring substantially as and for the purposes hereinbefore described.
2. The construction and arrangement of a gas bag for gas engine purposes, a
spiral spring or springs controlled by the movement of a flexible side or sides of the
bag or casing, substantially as and for the purposes hereinbefore described and as
illustrated in the accompanying drawings.
3. In a gas bag or casing for receiving gas, the method of attaching a flexible
side or sides by means of a split ring or rings of metal expanding into a recess or
recesses of the casing substantially as hereinbefore described and as illustrated in
Figures 5 and 6 of the accompanying drawings.
Dated this 31st day of October 1892.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents.