IMPROVEMENTS IN TRAM- WAY LOCOMOTIVES
Year: 1874

page_text: LETTERS PATENT to Peter Jensen, of 89, Chancery Lane, in the
County of Middlesex, for the Invention of "IMPROVEMENTS IN TRAM-
WAY LOCOMOTIVES."-A communication from abroad by Alexis Köhl,
of Copenhagen, in the Kingdom of Denmark.
ealed the 28th August 1874, and dated the 4th March 1874.
PROVISIONAL SPECIFICATION left by the said Peter Jensen at the
Office of the Commissioners of Patents, with his Petition, on the
4th March 1874.
I, PETER JENSEN, of 89, Chancery Lane, in the County of Middlesex,
do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN TRAMWAY LOCOMOTIVES" (a communication to me from abroad by
Alexis Köhl, of Copenhagen, in the Kingdom of Denmark), to be as
follows:-

page_text: which heretofore have prevented the application of steam for such
purposes, and which are chiefly owing to the use of visible and audible
steam exhausting into the air, and to the strange appearance of such
locomotives.
Locomotives constructed according to this Invention are as follows :—
The boiler which by preference is vertical and tubular, of well known,
approved, and effective construction is placed on the girder framing of
the carriage. The engine vertically inverted is placed on or against the
front of the boiler, and has two cylinders with the usual reversing gear.
The engine has a surface condenser, which by preference is arranged on
one side of the boiler, while the waste water tank is on the other, or
two waste water tanks may be placed on the fore carriage, one on each
side. The cold water supply cistern is placed behind the boiler. The
coal bunkers are arranged in the fore part of the carriage. The con-
tinuations of the piston rods forn the plungers for the air pump and
circulating pump respectively. The engine connecting rods are of the
forked or "sling" construction, and their bottom ends take on to crank
pins on discs fastened to the engine shaft; continuations of the same
pins transmit motion by means of link or connecting rods on to a two-
throw crank shaft, which forms the hind or driving axle of the carriage.
The fore wheels have "locking gear" and steering gear, which latter,
by preference, is arranged as follows:-The front axle has a projecting
frame with a nut, into which works a screw that by gearing and lever
appliance is made to revolve one way or the other when so actuated by
the driver, whereby the locomotive can be made to turn into sidings as
required. All the required handles for reversing, steering, steam
admission, and braking are arranged in the fore part of the carriage
accessible to the driver. To diminish the quantity of water necessary
for condensing very low vacuum is kept in the condenser, no more in
fact than requisite for condensing the steam. The smoke or gases from
the chimney may be conducted into the condenser or into a separate
water cistern, in either case so arranged as to be easily accessible for
cleaning out the soot; or a fan or other blower may be applied to
increase the draught and promote the smokeless combustion of the fuel.
The whole of the working and other parts of the locomotive are
enclosed in light framework, which outwardly presents the appearance
more or less of an ordinary tram car.
.
Instead of having inverted engines they may be arranged more or less

page_text: horizontally, one on each side, the motion being transmitted on to cranks
or pins on the hind axle by means of side connecting or link rods, and
vertical beams or side levers.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Peter Jensen in the Great Seal Patent Office on
the 3rd September 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, PETER
JENSEN, of 89, Chancery Lane, in the County of Middlesex, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourth day of March, in the year
of our Lord One thousand eight hundred and seventy-four, in the
thirty-seventh year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Peter Jensen, Her special
licence that I, the said Peter Jensen, my executors, administrators,
and assigns, or such others as I, the said Peter Jensen, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS
IN TRAMWAY LOCOMOTIVES " (a communication to me from abroad by Alexis
Köhl, of Copenhagen, in the Kingdom of Denmark), upon the condition
(amongst others) that I, the said Peter Jensen, my executors or
administrators, by an instrument in writing under my, or their, or
one of their hands and seals, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same was
to be performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that I, the said Peter Jensen, do hereby declare
the nature of the said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by
the following statement, reference being had to the accompanying

page_text: say :-
The object of this Invention is to construct a tramway locomotive
suitable for street and road traffic without having any of the objections
which heretofore have prevented the successful application of steam for
such purposes, and which are chiefly owing to the use of visible and
audible steam exhausting into the air and to the strange appearance of
such locomotives.
Figure 1 is a cross section on the line N, N%; Figure 2 is a side
elevation with the outer woodwork and the front of the bottom frame
removed; Figure 3 is a plan, and Figure 4 an outside elevation of a
locomotive constructed according to this Invention. a is the boiler,
which by preference is vertical as here shewn, and tubular and of some
well-known approved and effective construction, the boiler is fastened
to the girder framing of the carriage; b, b, are two steam cylinders,
which are placed on or against the front of the boiler, and here are
shewn as fastened to the top of two frame standards c, c, which are
fastened to the front of the boiler. The engine has the usual reversing
gear. d is a surface condenser which may be arranged so that the con-
densing water enters at C, passes up through a system of small pipes,
and finally passes out at D. The exhaust steam from the engine enters
the condenser at B, and is at A drawn off by the air pump, the surface
condenser may, however, be of other suitable construction. It is by
preference arranged on one side of the boiler, while the waste water tank
e is placed on the same or the opposite side, or two waste water tanks
might be placed on the fore carriage, one on each side, and suitably
united by pipe connections. The cold water supply cistern f is placed
behind the boiler. The coal bunkers 9, 9, are arranged in the fore part
of the carriage, and may be suitably placed one on each side, as here
shewn. The continuations of the piston rods h, h, form the plungers
for the pumps i and j, one of which is the air pump, and the other the
circulating pump; k is the feed pump, and is a disc or pulley for
driving a fan blower for forcing the draught of the boiler. The engine
connecting rods m, m, are of the forked or sling" construction, and
their bottom ends take on to crank pins n, n, or discs fastened to the
engine shaft; continuations of the same pins transmit motion by means
of the side rods o, o, on to a two-throw crank shaft p, which forms the
hind or driving axle of the carriage. The fore wheels have "locking
<<

page_text: gear" and "steering gear," which latter; by preference, is arranged as
follows: The front axle q has a projecting frame s¹, with a nut 8, into
which works a screw r, that by gearing and lever appliance or hand-
wheel u is made to revolve one way or the other when so actuated by
the driver, whereby the locomotive can be made to turn into sidings as
required. All the requisite handles for reversing, steering, steam admis-
sion, and braking are arranged in the fore part of the carriage accessible
to the driver. To diminish the quantity of water necessary for con-
densing very low vacuum is kept in the condenser, no more in fact than
requisite for just condensing the steam sufficiently. The smoke or gases
from the chimney may be conducted into the condenser or into a
separate water cistern, in either case so arranged as to be easily accessible
for cleaning out the soot, or a fan or other blower may, as aforesaid, be
applied to increase the draught and promote the smokeless combustion
First. The construction of a tramway locomotive naving outer frame-
work so as to present the outward appearance more or less of a tram car
as described and arranged with surface condenser d in combination with
the steam engine, the pumps i and j, side rods o, o, with or without .
lovers m¹, m', and with the cisterns e and f, and fore wheel steering
gear, all substantially as described and as shewn.

page_text: Second. The here described arrangement for condensing smoke and
gases from the boiler of a tramway locomotive.
In witness whereof, I, the said Peter Jensen, have hereunto
set my hand and seal, this Twenty-ninth day of August, in
the year of our Lord One thousand eight hundred and seventy-
four.