Improvements connected with Indicating or Recording and Control- ling the Speed of Electric Railway Cars or Vehicles, and other Machinery.
Year: 1899

page_text: Date of Application, 9th Oct., 1899
Complete Specification Left, 9th July, 1900-Accepted, 1st Sept., 1900
PROVISIONAL SPECIFICATION.
Improvements connected with Indicating or Recording and Control-
ling the Speed of Electric Railway Cars or Vehicles, and other
Machinery.
I, GEORGE HINDE NISBETT, of Ashfield, Huyton, in the County of Lancaster,
Electrical Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention has primirarily reference to improvements connected with
electric street and other railway cars or rolling stock, for the purpose of con-
trolling or regulating, and indicating or recording the speed thereof.
According to this invention, a small dynamo electric generator is employed in
connection with, and driven by, the electric motor of the car or train, or wheel
axle, or other parts operated thereby; and the current generated by this dynamo
is employed to actuate an electric indicator operated by a high resistance, and
having a mechanism similar to that in electrical measuring instruments, and
by which will be indicated the speed at which the car is running, the index being
calibrated in miles or suitable divisions. Or, the indicator or mechanism may
be of a type in which the speeds are recorded by a recording electrical device of
any suitable type or form; and this, in some cases, is provided with an index
pointer, whilst in others, the index and pointer are not employed.
There is also in connection with this small dynamo, an electrical automatic
"cut-off," by which, when the speed of the car or train reaches a certain point,
the current is automatically cut off; and it will be kept off until the speed
is reduced to that within the maximum limit required, when it is automatically
supplied again by the instrument.
Furthermore, in connection with this regulating or governing device, there
are, in some cases, provided electric brakes, to which current is adapted to be
supplied, when the limit of speed is reached, so that the brakes are put on auto-
matically under such circumstances; and, in some cases, they may be also auto-
matically taken off when the speed is again reduced to within the maximum
limit.
Although the invention has been described more particularly in connection
with electric railway trains or cars, it is to be understood that it may be em-
ployed in connection with other machinery and for other purposes of an analogous
or equivalent nature.

page_text: Improvements connected with Indicating or Recording and Control-
ling the Speed of Electric Railway Cars or Vehicles and other
Machinery.
I, GEORGE HINDE NISBETT, of Ashfield, Huyton, in the County of Lancaster,
Electrical Engineer, 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: —
This invention has primarily reference to improvements connected with
electric street and other railway cars or rolling stock, for the purpose of con-
trolling or regulating, and indicating or recording the speed thereof.
According to this invention, a small dynamo electric generator is employed in
connection with, and driven by, the electric motor of the car or train, or wheel
axle, or other parts operated thereby; and the current generated by this dynamo
is employed to actuate a deflecting electric indicator operated by a high resistance,
and having a mechanism similar to that in electrical measuring instruments, and
by which will be indicated the speed at which the car is running, the index being
calibrated in miles or suitable divisions. Or, the indicator or mechanism may
be of a type in which the speeds are recorded by a recording electrical device of
any suitable type or form; and this, in some cases, is provided with an index
pointer, whilst in others, the index and pointer are not employed.
There is also in connection with this small dynamo, an electrical automatic
cut-off," by which, when the speed of the car or train reaches a certain point,
and the current a certain voltage, the main switch will be released or opened and
the current automatically cut off; and it will be kept off until the speed
is reduced to that within the maximum limit required, when it is automatically
supplied again by the instrument.
are,
Furthermore, in connection with this regulating or governing device, there
in some cases, provided electric brakes, to which the current is adapted to be
supplied, when the limit of speed is reached, so that the brakes are put on auto-
matically under such circumstances; and, in some cases, they may be also auto-
matically taken off when the speed is again reduced to within the maximum
limit.
Although the invention has been described more particularly in connection
with electric railway trains or cars, it is to be understood that it may be em-
ployed in connection with other machinery and for other purposes of an analogous
or equivalent nature.
In the drawing there is shown diagrammatically a small dynamo electric
generator connected with an electric recording speed indicator of the kind herein
referred to. a is the dynamo, and 6 the recording speed indicator. c is a blank
diagram or chart, mounted on the revolving barrel d of the indicator. The
diagram is marked by a marker on the end of the arm indicator e. The cir-
cumferential lines of the diagram are the speed lines, and made to represent
miles per hour; whilst the other cross lines running parallel with the axis of
the cylinder, are the hour lines, to indicate the time of day. By this diagram
and instrument the rate of speed of a car for each instant of time is indicated,
and may be seen by the position of the arm e in relation to the diagram; and
this rate for each and every moment of time, is graphically recorded on the
diagram.
In the case where a record is not required, the indicator may be of the form

page_text: of a high resistance deflecting electric instrument of known measuring type,
the scale being calibrated in miles per hour, and the reading on the scale being
more or less proportional to the speed at which the dynamo is driven.
The automatic cut-off will be operated by the current from the dynamo, and,
as stated, can be of any well known types; it being so arranged and adapted that
at a pre-determined speed of the car or vehicle, and consequently pre-determined
voltage, the voltage will energize the magnet or other controlling device of the
cut-off sufficiently to open or operate a catch or other device, and release or
open the main switch, giving the supply of current to the car or other motor.
In some cases there is employed in connection with the automatic cut-off, an
electric brake of any known suitable type, and the action of which is controlled
by the automatic cut-off, and so adapted that the brake is applied when the
cut-off is actuated as above specified, whereby not only is all supply of current
to the car motor or machinery cut-off, when a certain speed is reached, but the
brakes are applied.
Having now particularly described and ascertained the nature of this in-
vention and in what manner the same is to be performed, I declare that what
I claim is:
1. In an electric railway car or vehicle, the combination of a dynamo electric
generator driven from the car or vehicle; (that is from a wheel axle, or machinery,
or motor of the car or vehicle), and means as specified operated or controlled by
the current from said generator: substantially as herein set forth.
2. The herein described improvement connected with indicating or recording
and controlling the speed of electric railway cars or vehicles, or other machinery,
namely, the employment in connection with such cars or vehicles, or machinery,
of a dynamo electric generator driven by said cars or vehicles, or machinery, and
an electric indicating or recording instrument or an electric indicating or re-
cording instrument and an electric cut-off; arranged and adapted to operate,
substantially as and for the purposes set forth.
3. The herein described improvement connected with controlling the speed of
electric railway cars or vehicles, or machinery, namely, the employment in con-
nection with such electric cars or vehicles, or machinery, of a dynamo electric
generator driven thereby, so that the speed of the generator varies with the
speed of the car or vehicle, or machinery; and an electric controlling means
whereby the speed, of the car or vehicle or machinery, is governed when a certain
speed of the car or vehicle or machinery is reached; operating substantially as
herein set forth.
CHEESBROUGH & ROYSTON,
Applicants' Patent Agents, 15, Water Street, Liverpool.