improvements in and relating to Syrens.
Year: 1899

page_text: Date of Application, 11th Apr., 1899
Complete Specification Left, 11th Jan., 1900-Accepted, 17th Feb., 1900
PROVISIONAL SPECIFICATION.
improvements in and relating to Syrens.
We, JAMES STEVEN and THOMAS BURT, both of the Firm of Steven Struthers,
Brassfounders, of Anderston Brass Foundry, Eastvale Place, Kelvinhaugh, in
the County of the City of Glasgow, do hereby declare the nature of our invention
to be as follows:--
This invention has reference to improvements in and relating to syrens of
the kind described in the Specification of the prior Patents Nos. 6018 of 1882
and 14625 of 1884..
According to our present improvements we close the lower end of the inner
revolving cylinder, and on a lower fluid-isolated continuation of it, we form
or secure a series of radial arms or vanes to form a motor, and we act on these
to rotate the cylinder by steam or compressed air from jet nozzles suitably
placed in the outer casing and we regulate the steam supply to this by a lever
having an arm whose extent of motion to act on valve will be adjustably regu-
lated by a screw threaded pin or equivalent device.
The combined rotating sounding cylinder and motor would be mounted by a
central boss round a screw adjustable spindle working within a pocket in outer
steam casing; and a series of small loose segments would be fitted in an annular
recess round upper part of revolving cylinder to act as brake rings.
The audible signalling or sounding action would be given to syren as follows:
A valve would be formed or fitted on a spindle and work against a seat between
steam chest and duct leading by the outer casing to the upper ports of rotating
cylinder, and the one end of the spindle of this valve would be fitted with a
recoil acting helical spring to assist in closing the valve; while the outer end
of spindle would be acted on by a piston to open the valve and admit steam
to give the audible alarm by passing inwards through the ports or ducts in upper
part of inner rotating cylinder.
This piston would work within a small close cylinder having ports at opposite end
leading into the cylinder of a piston valve having communication with steam chest.
This piston valve would be fitted with spindle and recoil acting spring and be
operated by a lever to open the port to act on piston and move the spindle to
open the large valve to admit steam from casing to ports of revolving cylinder
to give the audible signal; while the recoil action of a helical spring acting
on a arm of lever would automatically reverse the motion of piston valve to close
the aforesaid port, and steam would enter from the opposite port to reverse the
motion of piston in upper cylinder.
In some cases if desired the operating piston valve may be dispensed with,
and the large valve be actuated by a lever direct.
The sound directing cowl or hood would be fitted over the outer fixed cylinder
and be turned by worm or other gear in a usual manner.

page_text: By these improvements the motor can be started in advance of the inlet of steam
which gives the audible signal, and the sound will be instantaneous and of
constant pitch while the sound will be at once stopped immediately the valve
is closed.
70123 1
J
1
1000'
Improvements in and relating to Syrens.
We, JAMES STEVEN and THOMAS BURT, both of the Firm of Steven & Struthers,
Brassfounders, of Anderston Brass Foundry, Eastvale Place, Kelvinhaugh, in
the County of the City of Glasgow, do hereby declare the nature of our invention
and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement, in writing, reference being
made to the accompanying drawings:-
This invention has reference to improvements in and relating to syrens of
the kind described in the Specifications of the prior Patents Nos. 6018 of 1882
and 14625 of 1884.
And in order that our said invention and the manner of carrying same into
practice may be properly understood we have hereunto appended two
sheets of explanatory drawings in which Figure 1 is a sectional elevation, and
Figure 2 a view at right angles thereto, partly in section, of a syren as constructed
in accordance with our improvements.
Figure 3 is a detached view showing the motor valve of syren and actuating
gear. Figure 4 is a sectional plan view of motor as taken on the line 1-1 of
Figure 1; while Figure 5 is a detached sectional plan showing the ports as taken
on the line 2-2 of Figure 1.
Referring to these drawings:-
;-
According to our present improvements we close the lower end A' of the inner
revolving cylinder A, and on a lower fluid-isolated continuation of it A³, we
form or secure a series of radial arms or vanes a to form a motor, and we act
on these to rotate the cylinder by steam or compressed air from jet nozzles a¹
suitably placed in the outer casing B; and we regulate the steam supply to this
by a lever having an arm b' whose extent of motion to act on the valve 62.is
adjustably regulated by a screw threaded pin or equivalent device.
A guide
stop 6 is fitted for a spring & being mounted on for returning valve to its closed
position.
The combined rotating sounding cylinder and motor would be mounted by
a central boss C round a screw adjustable spindle C¹ working within a pocket
in outer steam casing B; and a series of small loose segments would be fitted
in an annular recess round upper part of revolving cylinder A to act as brake
rings.
The audible signalling or sounding action would be given to syren as follows:-
A valve D¹ would be formed or fitted on a spindle D and work against a seat B¹
between steam chest and duet leading by the outer casing to the upper ports a²
of rotating cylinder, and the one end of the spindle 1 of this valve would be
fitted with a recoil acting helical spring D2 to assist in closing the valve; while
the other end of spindle D would be acted on by a piston E¹ to open the valve D¹
and admit steam to give the audible alarm by passing inwards through the ports
or ducts a² in upper part of inner rotating cylinder A.

page_text: This piston E would work within a small close cylinder having ports e e¹
at opposite ends leading into the cylinder of a piston valve F1 having com-
munication with steam chest. This piston valve F would be fitted with
spindle F and recoil acting spring F and be operated by a lever f to open the
port e to act on piston E¹ and move the spindle D to open the large valve D' to
admit steam from casing to ports of revolving cylinder A to give the audible
signal; while the recoil action of helical spring f acting on an arm f of lever f
would automatically reverse the motion of the piston valve F1 to close the afore-
said port e, and steam would enter from the opposite port e¹ to reverse the motion
of piston E in the upper cylinder E. The valve thus remains closed and
the steam is completely cut off when the syren is not sounding.
In some cases if desired the operating piston valve may be dispensed with,
and the large valve be actuated by a lever direct.
The sound directing cowl or hood G would be fitted over the outer fixed
cylinder B and be turned by a worm and worm wheel G1, G2, or other gear in
a usual manner.
By these improvements the syren is started and driven independently of the
fluid used in producing the sound and the motor can be started in advance of
the inlet of steam which gives the audible signal, and the sound will be instan-
taneous and of constant pitch while the sound will be at once stopped immediately
the valve is closed.
Having now particularly described and ascertained the nature of our inven-
tion and in what manner the same is to be performed we are aware of the
Specification No. 20450, A.D. 1890, and we claim nothing described and claimed
therein, but we declare that what we claim is: -
First. In syrens, the combination of a rotating sounding cylinder and a motor,
so that the syren is started and driven independently of the fluid used in pro-
ducing the sound, substantially as herein described in reference to and shown
in the accompanying drawings.
Second. In syrens, the arrangement in combination of a double acting piston
valve and piston for opening and shutting the main sounding valve of syren,
substantially as herein described in reference to and shown in the accompanying
drawings.
Third. In syrens, the arrangement of motor valve with lever and regulating
fittings for controlling the supply of fluid, substantially as herein described in
reference to and shown in the accompanying drawings.
Fourth. A syren having its parts arranged and acting in combination, sub-
stantially as herein described in reference to and shown in the accompanying
drawings.
1
101
1000
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.