Improvements in Apparatus for the Production of Electricity in Railway Carriages and other Vehicles.
Year: 1898

page_text: Date of Application, 2nd June, 1893
Complete Specification Left, 2nd Mar., 1899-Accepted, 22nd Apr., 1899
Improvements in Apparatus for the Production of Electricity in
Railway Carriages and other Vehicles.
I, EDWIN JAMES PRESTON, of the Firm of J. Stone & Co., of Deptford, in the
County of Kent, Engineers, do hereby declare the nature of this invention, a
communication to me from abroad by the Gould Coupler Company, of Depew,
in the State of New York, United States of North America, Manufacturers, to
be as follows:
-
In the so-called Stone system of electric train lighting described in the Patent
Specification 1611 of 1895 the dynamo is susupended at one end from the carriage
frame and driven from a carriage axle by belt or frictional gear in such manner
that the dynamo is pressed away from the driving axle thus producing the necessary
belt tension or friction for driving the dynamo at a predetermined normal speed,
while when the speed of the driving axle increases beyond that intended for the
normal speed of the dynamo the latter is drawn towards the driving axle and
the belt caused to slip, the consequence being that the dynamo speed is never
increased beyond its aforesaid normal measure. Now according to the present
invention with the same object in view, and as applied to dynamos of various
kinds and sizes but more particularly for large dynamos and to produce a stronger
light the dynamo is suspended at each end in links from the underframe of the
carriage. These links may be connected by other or longitudinal links forming
a parallelogram and this system of link is by a lever or levers connected to an
adjustable spring, by preference a helical enclosed one fixed to the carriage
underframe. This spring tends to impart the required tension to the belt. The
strap and pulleys may be enclosed in a gear case similar to that used for bicycles,
consisting of a half circular part at each end and two intermediate parts joined,
the half circular part at the carriage axle being suspended in a spring from the
frame in which the carriage axles are arranged; the gear case may also be carried
at an intermediate point by the said frame.
T
1000
Improvements in Apparatus for the Production of Electricity in
Railway Carriages and other Vehicles.
I, EDWIN JAMES PRESTON, of the Firm of J. Stone & Co., of Deptford, in the
County of Kent, Engineers, do hereby declare the nature of this invention, (a
D 073

page_text: communication from the Gould Coupler Company, of Depew, in the State of
New York, United States of North America, Manufacturers,) 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 the socalled Stone system of electric lighting apparatus
for railway carriages and other vehicles described in the Patent Specification 1611
of 1895 in which the current is generated by a dynamo driven from one of the
car axles by a belt or frictional gear which slips when the speed of the driving
axle exceeds that which is necessary to properly drive the dynamo thereby
neutralizing such excess of speed and maintaining a practically uniform normal
speed of the dynamo, the consequence being that the dynamo speed is never
increased beyond a predetermined normal measure.
Now according to the present invention and with the same object in view and
as applied to dynamos of various kinds and sizes but more particularly for large
dynamos and to produce a stronger light the dynamo is suspended at each end
in links from the underframe of the body of the carriage.
Fig. 1 is a diagram showing in principle one way of carrying the invention
into effect. The dynamo A is in this instance supposed to be encased and is
suspended in slanting links B from the underframe C the strap D passing round
the pulley E on the road wheel axle t' and the pulley G on the dynamo shaft H.
The belt is of such a length that the weight of the dynamo while bending to
move to the right, so that the links B would then hang vertical, gives to the
belt the tension for driving. The required tension may be provided or
increased to any required extent by a weight Q adjustable on a lever K or by
equivalent spring device.
Fig. 1 is a diagram of a modified arrangement in which the dynamo A is
suspended in a slanting direction so that its weight tends considerably to pull
the belt D taut; a spring Q under compression and which should be made
adjustable assists this tendency.
Fig. 2 is a side view Fig. 3 an end view and Fig. 4 a plan of a link suspension
arrangement. The dynamo A is suspended from the underframe C in a pair
of links B at each end. The dynamo enclosing case has removable covers as
shown. The links B are in this example shown in a vertical position. The links
on the right are by longitudinal links I connected to the lower vertical arm K
of a bell crank lever hung in a bracket L. on the underframe and the other or
horizontal arm K¹ of the bell crank lever is jointed to a cylindrical box M which
slides with feather and groove or other guiding device in a cylindrical box N
which hangs in a screwed rod 0 provided with collars 0' 02 on the lower and
upper side of a box P that is fixed in the floor of the carriage. Q is a helical
spring in the box M. The screwed rod O has a square head for turning it by
means of a box spanner in order to adjust the tension of the spring according
to the desired tension to be given to the belt D. Instead of a helical spring a
pneumatic one may be used in this case and in the other cases here illustrated
or a weight may be applied which should be adjustable as to its position for
the purpose of regulating the tension of the belt as required. The dynamo is
encased and provided with removable covers.
Figs. 5 and 6 are side view and plan of another link suspension arrangement
in which the bell crank lever, hung in a bracket L on the underframe, has its
vertical lower arm connected to the left hand links B, while its horizontal arm K¹
is jointed to the box M containing the spring Q.
Figs. 7 and 8 are side view and plan of an arrangement similar to that of
Figs. 2, 3 and 4 but shewing the strap and pulleys enclosed in a gear case similar
to that used for bicycles, consisting of a half circular part R and S at the ends,
and two intermediate parts T and U joined, the half circular part R at the
carriage axle being suspended in a spring V from the frame W in which the
carriage axles are arranged. The gear case may also be carried at an inter-
mediate part from the said frame by a hinge X.

page_text: Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
1. The mode of suspending the dynamo at each end in links substantially as
and for the purpose set forth.
2. The combination of links for suspending the dynamo and of a spring for
adjusting the tension of the belt, substantially as set forth.
3. The constructions of link suspension device shewn and described.
4. The consruction of driving gear enclosing case shewn and described.
Dated
1000
JENSEN & SON,
77, Chancery Lane, London, W.O.,
Patent Agents.
JENSEN & SON,
77, Chancery Lane, London, W.O.,
Patent Agents.