Improvements in Locomotives.
Year: 1895

page_text: Date of Application, 21st Nov.. 1895
Complete Specification Left, 17th Apr., 1896-Accepted, 6th June, 1896
Improvements in Locomotives.
I, GEORGE WILLIAM JOHNSON, of 47 Lincoln's Inn Fields, in the County of
Middlesex, Gentleman, do hereby declare the nature of this invention (which has
been communicated to me from abroad by Jean Pierre Serve of 17 Quai de Cuire
Lyons (Rhône) in the Republic of France Engineer) to be as follows:-
This invention relates to improvements in locomotives in which the draught is
mechanically produced by means of fans and has for its object to provide means
for obtaining an efficient locomotive of this class.
According to this invention there are employed two fans placed one on each
side of the smoke box, and operated through bands by motors arranged
symmetrically and a device for starting the fans and heaters for the feed-water
also arranged symmetrically on each side of the locomotive which heaters receive
the exhaust steam from the engine and utilise its heat for heating the feed water.
The fans are secured to a shaft to which are also secured the pulleys for the
driving bands thus obtaining a symmetrical suction or draught of the hot gases in
the smoke box and consequently an equal distribution of the gases through the
tubes and the proper working of the locomotive, even if one of the motors be put
out of use,
and moreover the mechanism which operates the fans will not be
impaired by the vibrations of the locomotive.
The fans are each enclosed in a box or case communicating by means of conduits
with the funnel.
The driving bands should be passed several times round their pulleys and also
round an auxiliary pulley which acts as a tension device and which is held in a
grooved support by means of a screw permitting the tension of the band to be
regulated to ensure the proper working of the fans.
To cause the immediate starting of the fans although the motors may be at a
dead point I arrange within the fan boxes or cases pipes or nozzles set obliquely
and communicating by a pipe with a steam cock on the steam dome of the boiler,
so that directly the driver opens the steam cock so as to allow steam to pass to the
motors for driving the fans steam also enters by the said pipes or nozzles to act on
the blades of the fans so causing them to at once rotate.
Any suitable means may
be employed for interrupting the feed of steam to the said pipes or nozzles as soon
as the motors are properly at work.
In order to utilise the otherwise waste heat of the exhaust steam from the
motor cylinders of the locomotive and from the fan motors the exhaust steam from
both is conducted to feed-water heaters placed symmetrically one on each side of
the locomotive and provided if desired with compartments enclosing substances
adapted to retain lubricant from the steam. Any steam which is not condensed
escapes into the atmosphere by special conduits or by the funnel. The feed-water
supplied from the tender is fed to and through the tubes of the feed-water heaters
and thence is conducted to the boiler through the valve boxes. The feed-water
pump is preferably placed beneath the locomotive and is operated by an eccentric
mounted on the axle of one of the driving wheels of the locomotive.
Any convenient means may be employed for supplying the water from the
tender to the feed-water heaters which latter may be arranged in any suitable
manner their object being to utilize the heat of the exhaust steam for heating the
feed-water.

page_text: My invention is not restricted to the precise arrangements which I have
described, for example the fans may be arranged to work independently of each
other by mounting them each on a separate shaft so that the motors driving the
fans may also be independent of each other.
Dated this 21st day of November 1895.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C.
Improvements in Locomotives.
I, GEORGE WILLIAM JOHNSON, of 47 Lincoln's Inn Fields, in the County of
Middlesex, Gentleman, do hereby declare the nature of this invention (which has
been communicated to me from abroad by Jean Pierre Serve, of 17 Quai de Cuire
Lyons (Rhône) in the Republic of France, Engineer) 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 improvements in locomotives in which the draught is
mechanically produced by means of fans as described in the Specification of
Letters Patent, No. 12530 of 23 July 1891, and has for its object to provide
means for obtaining an efficient locomotive of this class.
According to this invention, there are employed two fans, placed one on each
Bide of the smoke box and operated through bands by motors arranged
symmetrically and a device for starting the fans and heaters for the feedwater also
arranged symmetrically on each side of the locomotive, which heaters receive the
exhaust steam from the engine, and utilize its heat for heating the feed-water.
In the accompanying drawings,
Figure 1 is a side elevation of a locomotive provided with my improvements.
Figure 2 is a plan of the same.
Figure 3 is a transverse section taken through the lines y y Figure 2, and
Figure 4 is a section drawn to a larger scale of the device for starting the fans.
The fans A A are secured to a shaft C to which are also secured the pulleys I
(one at each end) for the driving bands J, thus obtaining a symmetrical suction or
draught of the hot gases into and from the sinoke box B and consequently an equal
distribution of the gases through the tubes, and the proper working of the
locomotive, even if one of the motors DD be put out of use, and moreover the
mechanism which operates the fans will not be impaired by the vibrations of
the locomotive.
The fans A are each enclosed in a box or case E communicating by means of
conduits G with the funnel F.
The driving bands J should be passed several times round their pulleys I and K,
and also round an auxiliary pulley L Figure 1 which acts as a tension device, and
which is held in a grooved support by means of a screw H permitting the tension
of the band to be regulated to insure the proper working of the fans.
To cause the immediate starting of the fans although the motors D may be at a
dead point, I arrange within the fan boxes or cases E, pipes or nozzles M Figure +
set obliquely and communicating by pipes N with a steam cock O on the steam
dome of the boiler, so that directly the driver opens the steam cock by means of
a rod P so as to allow steam to pass through the pipes Q to the motors D for
driving the fans, steam also enters by the said pipes N to the nozzles M to act on
the blades R of the fans, so causing them to at once rotate. Any suitable means
may be employed for interrupting the feed of steam to the said pipes or nozzles M
as soon as the motors D are properly at work.
In order to utilize the otherwise waste heat of the exhaust steam from the motor

page_text: cylinders U of the locomotive and from the fan motors D, the exhaust steam from
both is conducted by the pipes p and q respectively to feed water heaters T
Figures 1 and 2 placed symmetrically one on each side of the locomotive.
The feed water heaters may be of any known type for example they may be
formed of sets of tubes through which the feed water passes and enclosed in a
casing into which the exhaust steam is led. The water of condensation formed in
the casing when heating the feed water circulating through the tubes is discharged
onto the line through a pipe arranged at the bottom of the casing or it may be
used as the feed water when it is led by the said discharge pipe to the piper which
supplies the feed water from the tender. In this case the feed water heater casings
are preferably provided with compartments enclosing substances adapted to free
the steam from the lubricant or other fatty matter as it passes therethrough. Auy
steam which is not condensed escapes into the atmosphere by special conduits V or
by the funnel F. The feed-water supplied from the tender by the piper is fed to
and through the tubes of the feed-water heaters T and thence is conducted through
the pipes and the valve boxes to the boiler. The feed-water pump X is
preferably placed beneath the locomotive and is operated by an eccentric Y
mounted on the axle of one of the driving wheels of the locomotive.
Any other convenient means may be employed for supplying the water from the
tender to the feed-water heaters which latter may be arranged in any suitable
manner, their object being to utilize the heat of the exhaust steam for heating the
feed water.
Having now particularly described and ascertained the nature of the said.
invention and in what manner the same is to be performed I declare that what I
claim is :-
1. In a locomotive the combination of fans drawing the hot gases from the smoke
box and mounted on one axle driven by motors arranged at each side with means
for operating the same consisting of adjustable driving bands substantially as
herein before described.
2. In a locomotive the combination with a fan or fans for drawing gases from
the smoke box of pipes or nozzles set obliquely in the fan casing for projecting
steam onto the blades of the fan for starting and means for cutting off the feed of
steam when the fan is in proper operation, all substantially as hereinbefore
described.
3. In a locomotive in which the draught is produced by suction; the combination
of two fans A situated symmetrically one on each side of the smoke box and
mounted on a shaft C passing through the said smoke box; symmetrically
arranged driving bands J, each with an auxiliary tension pulley L for driving the
fan shaft C, two motors D each operating one of the said driving bands J, pipes or
nozzles M set obliquely for injecting steam onto the blades of the fans for starting
them, two feed-water heaters T placed symmetrically one on each side of the
engine and receiving the exhaust steam from the motor cylinders U of the loco-
motive and from the fan motors D, and discharging the non-condensed steam by
conduits V all substantially as hereinbefore described and illustrated in the
accompanying drawings.
Dated this 16th day of April 1896.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.