IMPROVEMENTS IN SPEED INDICATORS to be as follows:
Year: 1884

page_text: I DANIEL ORME of 21 Churchill Street Oldham in the County of Lancastor
Gas Meter Manufacturer do hereby declare the nature of the said invention for
" IMPROVEMENTS IN SPEED INDICATORS to be as follows:-
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My Invention relates to the apparatus employed to indicate and record variations
in the speed of prime movers such for example as steam engines and the times of
starting and stopping the same. In apparatus which has been used for the purpose
a pencil moved to and fro by the rising and falling of a part moved by a governor
has recorded the variations upon a riband of paper fed forward by clock work. In
iny apparatus I attach a sheet of paper to the circumference of a drum which is
rotated by clock-work making a revolution once in twelve hours or in twenty-four
hours. The pencil or tracer is carried by or connected with a rod or sliding part
which receives motion from a lever which is acted upon by a revolving apparatus
similar to a governor.
In the arrangement I have adopted the governor when
running at its normal speed keeps in suspension a load which bears upon one end
of the said lever the other end being connected by means of a toothed sector with
a rack upon the said rod or sliding part, the lever enabling me to multiply the
movement of the load so as to obtain more distinct indications. The part of the
lever which bears against the load on the governor is or may be forked and is made
of such a curve as that equal variations in speed or equal movements of the
governor balls shall produce proportionate movements in the pencil or tracer. The
lever is kept in contact with the load or with a part in connection therewith. As
the said drum is rotated it is also moved in the direction of its axis so that the
tracer marks a spiral indication upon the paper. The drum is sustained by means
of a fixed screw and a nut or pin or part in the cylinder works in the thread of
The paper is divided by means of spiral lines which separate the
indications for one day from those of other days and with vertical or cross lines
which divide the circumference of the paper surface into hours which are sub-
divided into intervals of five minutes or into other desired intervals. The drum is
made of such a length as that it can make seven revolutions when moving end wise
in one direction so that the paper can contain the record for a week but this may
be varied. At the end of the week the paper is exchanged for a fresh piece and
the drum is turned or moved back to cominence a fresh set of indications. At
the times when the engine stops the pencil or tracer is lifted or moved out of
contact with the paper by means of fixed inclines or by other suitable means.
the screw.
Dated this 10th day of Anril 1981

page_text: I DANIEL ORME of 21 Churchill Street, Oldham, in the County of Lancaster,
Gas Meter Manufacturer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN SPEED INDICATORS" and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement and accompanying drawings:
My Invention relates to the apparatus employed to indicate and record variations
in the speed of prime movers such for example as steam engines and the time of
starting and stopping the same. In apparatus which has been used for the purpose
a pencil moved to and fro by the rising and falling of a part moved by a governor
has recorded the variations upon a riband of paper fed forward by clockwork. In 1
my apparatus I attach a sheet of paper to the circumference of a drum which is
rotated by clockwork making a revolution once in twelve hours or in some cases
once in twenty-four hours. The pencil or tracer is carried by or connected with
a rod or sliding part which receives motion from a lever which is acted upon by
a revolving apparatus similar to a governor. As the said drum is rotated it is also
moved in the direction of its axis so that the tracer marks a spiral indication upon
the paper. The paper is divided by means of spiral lines which separate the
-indications from one day from those of other days and with vertical or cross lines
which divide the circumference of the paper-surface_into_hours which are sub-
divided into intervals of five minutes or into other desired intervals. In the case-
of a drum revolving in twelve hours the drum is made of such a length as that it
can make fourteen revolutions when moving endwise in one direction so that the
paper can contain the record for a week but this may be varied. At the times
when the engine stops the pencil or tracer is lifted or moved out of contact with
the paper by means of fixed inclines or by other suitable means.
In order that my Invention may he clearly understood I will refer in this place
to the accompanying sheet of drawings.
In the said drawings Fig: 1 represents a front view and Fig: 2 a vertical section
of an apparatus constructed in accordance with my invention. In the said Figs A
is the said drum B is the clockwork which actuates the drum and C is the so called
governor which gives motion to the tracer. The clockwork may be of any suitable
construction, so that it has not been considered necessary to illustrate any particular
arrangement of parts constituting such clock work. The clockwork is connected
by means of a spindle d with the drum and is constructed to impart to the drum
one revolution in each twelve hours or in cach twenty-four hours or in any other
desired interval of time as preferred or considered to be best suited to the require-
ments of the case. In the lower end of the drum is formed or fixed a nut a which
engages with the thread or threads of a fixed screw e which is secured to a cross
bar f. The connection of the spindle d with the drum is such as that the drum is
compelled to revolve with the spindle but is free to slide upon it. It will be
clearly seen that for each revolution of the drum it will be lowered or raised to an
extent equal to the pitch of the screw. In practice I prefer to arrange for the
drum to be lowered as this requires less powerful clock work. The paper or
material upon which the record is to be marked is printed or marked with lines
which are so inclined as that when the paper is secured to the drum so as to
encircle the same the said lines will be spirals corresponding in pitch with the
pitch of the screw. Arrangements might be made for the tracing of these lines
during the rotation of the drum in order to obtain greater accuracy. These lines
are intended to render apparent or to facilitate the measurement of the indications
of variations of speed. Other lines indicating hours and sub-divisions of hours
are in vertical positions when the paper is upon the drum as seen in Fig: 1. The
governor is of any suitable construction. In the example revolving pendulums

page_text: sustain a load c. A lever g is mounted upon a fulcrum at h and one end which is
preferably forked bears upward against a collar upon the sliding sleeve i. The
parts so bearing against the said collar are made of such a curve as that the tracer
will be caused to make equal movements for equal variations in speed-that is to
say the marks made by the tracer will be in exact proportionate length to the
variations in speed. I do not however confine myself to the use of the lever
having such curved surfaces. Upon the other end of the lever is formed or fixed
a toothed quadrant which gears with teeth which are formed on a rod k which is
fitted to slide up and down. Chains or bands may be substituted for the toothed
connection. The upper end of the said rod carries the tracer which is jointed to
the rod and is weighted or is acted upon by a spring so that it bears with a suitable
degree of force upon the surface of the paper. When the engine is at rest the
load c falls to its lowest point as indicated in the drawing thereby raising the
tracer to a higher position than it ever reaches during the working of the engine.
When the tracer is so raised one end of the lever which carries the tracer comes in
contact with a fixed stop m whereby the tracer is withdrawn from contact with
the paper as in the drawing. When the engine is started the tracer is lowered and
at once commences to mark the paper. The times of stopping and starting are
thus clearly indicated. I may vary the method of withdrawing the tracer from-
contact with the paper. It will be seen that so long as the engine is running the
tracer will be moved up and down in contact with the paper and will indicate
variations in speed as in other apparatus employed for the same purpose but these
indications will be marked spirally around the drum and supposing the drum to
make fourteen revolutions in a week the variations in a weeks working will be
indicated upon the one sheet of paper without the necessity for any alteration
of the apparatus or re-fixing of the paper and the sheet so marked will be in
a form convenient for pasting in a book or for otherwise filing for future reference.
The drum being made of a suitable length and the screw of a suitable pitch the
indications upon a single sheet may be extended over a longer period than one
week or if considered to be advisable over a shorter period.
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 combination of parts forming the apparatus constructed and acting
substantially as and for the purpose set forth and indicated.
2. In apparatus for the indicated uses the combination of a so called governor
for moving to and fro a tracer which records variations in speed upon a sheet of
paper or material which is fixed upon a drum which is actuated by clockwork to
revolve upon its axis and at the same time to move endwise substantially as set
forth and indicated.
3. The drum rotated by clock work and moved endwise by the action of a screw
substantially as and for the purpose set forth and indicated.
4. The drum rotated by clockwork and at the same time moved regularly and
continuously in the direction of its axis during a period of seven days or during
a longer or shorter period substantially as and for the purpose set forth and
indicated.
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