Year: 1886

page_text: Date of Application, 17th July, 1896
Complete Left, 16th Apr., 1887.
Complete Accepted, 20th May, 1887.
I NORMAN MACBETH of the Victoria Foundry Bolton in the County of Lancaster
Engineer, do hereby declare the nature of this invention to be as follows:-
My Invention consists of improvements in or additions to a former invention for
which Letters Patent bearing date the 11th day of August in the year 1883 have been
granted to me. In the Specification of my said former invention, I described an
apparatus for recording variations in speed, wherein a tracer recorded the indications
on the inside of a cylindrically bent sheet of paper or material and in order that
records extending over an interval of more than one day might be obtained, the paper
or the cylinder carrying the paper or the tracer was arranged to be raised in the
direction of the central axis after the completion of each days record. According to
my present invention I provide a separate tracer for each day of the period over
which it is desirable that the record shall extend without change of paper and
I arrange for a fresh tracer to be brought into action automatically at regular intervals
as for example at intervals of twenty-four hours. When the apparatus is intended to
furnish the record of a weeks working without change of paper I provide say seven
tracers which are carried by a spindle which is mounted to revolve upon an axis which
is about parallel with the axis of the cylindrical case which holds the sheet of paper.
The said tracers project from the said spindle at different points in the length thereof
and radiate from the spindle at equal distances apart around its axis. The said spindle
is carried by a frame which receives the to and fro movement from the central spindle
and is carried around the central axis by means of clock-work say once in twenty-four
hours. As the tracer carrier moves around the interior of the said cylindrical case a
projection comes into contact with a toothed wheel on the tracer spindle or in contact
with one of the tracers, whereby the tracer spindle is caused to make one seventh of a
revolution a fresh tracer being thereby brought into action. In some or in all cases
I convey the reciprocating movements to the tracer carrier by means of a lever in
order that the movements directly received from the governor may be enlarged or
reduced as desired by changing the position of the fulcrum. In some cases I provide

page_text: the apparatus with means for recording the variations in steam pressure. The steam
pressure acts through a piston or diaphragm upon a spring which expands and
retracts in proportion to the fall and rise in the said pressure and movements derived
from this spring are conveyed to the central axis of the apparatus and imparted to a
lover which is connected with a tracer carrier. In some cases I provide the apparatus
with an auxilliary analysing apparatus whereby when desirable a record is obtained
upon a piece of paper which is moved more quickly than the paper which is fixed
inside the cylindrical case. The said analyser can be clamped to the case at any point
so that the part which carries the auxilliary tracer can rest upon the aforesaid tracer
carrier. The paper upon which the record is to be obtained is attached to a disc
which can be revolved by hand or operated by a cord which is connected with the
engine or machine which is being tested. To obtain a suitably slow motion I may
actuate the disc by means of a travelling pinion which gears with wheels differing to
the extent of say one tooth. The paper might be attached to a sliding carrier.
1
ST11000
DUTTON & FULTON,
1, St. James Square, Manchester,
Agents.

page_text: Improvements in Apparatus for Recording Variations in the Speed
of Machinery.
I NORMAN MACBETH of the Victoria Foundry, Bolton in the County of Lancaster,
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 and accompanying drawings
My Invention consists of improvements in or additions to a former invention for
which Letters Patent bearing dated the 11th day of August in the year 1883 have
been granted to me. In the Specification of my said former invention I described an
apparatus for recording variations in speed wherein a tracer recorded the indications
on the inside of a cylindrically bent sheet of paper or material and in order that
records extending over an interval of more than one day might be obtained the paper
or the cylinder carrying the paper or the tracer was arranged to be raised in the
direction of the central axis after the completion of each days record.
The present invention relates more particularly to a novel arrangement of the tracer
carrier whereby at the end of each days work a fresh tracer is presented to the paper
in a different plane so that the record of say a weeks work can be taken automatically.
My improved recorder is made either with or without an adjunct for analyzing or
enlarging a portion of the record when such analysis or enlargement is thought to be
necessary.
Sheet 1 of the annexed drawings illustrates the improvements applied to the
recorder and Sheet 2 shows the analyzing or enlarging apparatus.
On sheet 1 of the drawings Fig. 1 is a vertical section of a complete recording
apparatus.
Fig. 2 is a plan of the double lever arm which moves the tracer carrier.
Fig. 3 sheet 2 is an enlarged view of the tracer carrier.
Fig. 4 is a plan of Fig. 3.
The recorder casing a is cylindrical in form and contains a governor / which is
driven from the engine by a band passing round the pulley c.
The shaft which carries
the pulley c is connected by bevel gearing d to the upright shaft e which supports the
governor. As the governor revolves the arms frise or fall and correspondingly raise
or lower the weighted sleeve g which is connected by links h to the arms f. Upon
the top of the sleeve g is supported the lower end of a spindle i which revolves and
slides in a sleave bearing j and carries at its upper end the double lever arm k which
communicates the rising and falling motion to the tracer carrier l. The tracer carrier /
which is not fully shown in Fig. 1 but is more clearly illustrated in Figs. 3 and 4 is
mounted to turn and slide on a stud m on the outer end of the revolving arm n the
said arm n revolving on a reduced extension of the sleeve bearing j. A toothed spur
wheel o is fixed by a set screw to the boss n¹ of the arm n so that as the spur wheel o
is revolved by this clock work arrangement p and connecting gearing shown the arm n
is correspondingly revolved to the extent of say one revolution per 24 hours. The
tracer carrier is thus taken once round the interior of the cylindrical case in each 24

page_text: g
hours. As more clearly shown in the enlarged view Figs. 3 and 4 the tracer carrier
consists of a sleeve / having a projection at the top and bottom which carry a tracer
bar the said bar q being provided with a number of tracers, 1 2 203 204 205 205 p² corre-
sponding in the present instance to the number of days in the week. It will be
observed that each tracer point is set at a different angle to the others so that when
one of the tracer points is resting on the paper the other tracer points will be clear of
the paper. The top of the bar q carries a ratchet wheel s the tooth of which corre-
spond to the number of tracer points. A spring detent t prevents the ratchet wheel
from revolving more than one tooth at a time. A projection z on the sleeve / serves
as a shoulder whereby the double lever k raises the tracer carrier and at the lower end
of the sleeve is a projection v to which a spring w is attached as shown in Fig. 1 so
as to hold the tracer point against the paper. The strip of paper is placed within the
machined interior of the upper part a¹ of the casing a and is held securely between
the cover and the spring clip y. The paper is ruled with say seven lines for the
seven days as shown at Fig. 5 each line being opposite to the centre of its corre-
ponding tracer point. Thus at the commencement of a weeks work line 1 will be
opposite to tracer point r¹. At the end of the first days work starting from the point a
fig. 4 the tracer carrier will have completed the circuit in the direction of the arrow
and the projection a will come into contact with the tooth of the ratchet wheel which
corresponds to the tracer point r¹ and will cause the tracer bar g to make one seventh
of a revolution, presenting the tracer point to the line 2 on the paper and re-com-
mencing a fresh record for the current day. The ratchet wheel might be dispensed
with and the bar q be turned by acting directly upon the tracers as if they were teeth
upon the bar, but I prefer to use a ratchet wheel for the purpose. The bar q is thus
revolved and a fresh tracer point presented daily until the weeks work is complete
after which the paper is removed and a fresh slip inserted. If desired the paper could
be made to contain more than one week's work, in which case the number of the tracers
would be correspondingly increased. In addition to the day lines the paper may also
be marked with indications of time such as hours, half hours &c. as shewn at Fig. 5.
The rise and fall of the tracer points may correspond exactly with the rise and fall of
the governor or if desired the rise and fall of the tracers as compared with the
movements of the governor may be multiplied or diminished. When it is desired
that the rise and fall of the tracer shall correspond exactly to the movement of the
governor the double lever k is fixed to the block 1 by both of the pins 2 and 3 in
which case the lever k rises and falls and moves the tracer carrier exactly as the
governor rises and falls. Should it be desired however to exaggerate the move-
ments of the tracer point as compared with the movements of the governor as for
example in the case of an engine in which the variations of speed are not great
it is only necessary to remove one of the two pins 2 and 3 and insert a stop
roller 4 (indicated in dotted lines) between the prolonged ends of the double lever k.
The bent tail of the revolving arm n prevents this end of the double lever from
rising and acts as a fixed fulcrum the motion of the free end of the double lever
being thus correspondingly increased. The tracer carrier is thus raised and lowered
to a greater degree as compared with the movements of the governor than in the
former case. When it is required to diminish the movements of the tracer as
compared with those of the governor which might be desirable in the case of an engine
running at greatly varying speeds the required diminution may be effected by removing
the roller 4 from the outer end of the double lever and placing it in the position
marked 5 a projection being formed on the arm n to act as an abutment to the roller
in this position. A set screw 6 and jamb nut is applied to the block 1 to prevent the
lever and tracer carrier from falling below a certain point. The block I is screwed
upon the upper end of the spindle i and is jambed in position by a nut 7. The arm:n
and spur wheel o are kept in their position on the checked sleeve bearing ; by a
collar 8 retained by a set screw. Owing to the slow speed of the clockwork the
indications of the tracers on the paper are usually so close together that it is almost
impossible to distinguish the separate up and down strokes of the tracer. In order to
analyze or spread out these markings so as to render them separately more apparent

page_text: as regards fluctation within a very short space of time, say for example during one or
more revolutions of the engines, I use the apparatus shown on sheet 2 of the
annexed drawings. Fig. 6 is an elevation of the analyzer and Fig. 7 a plan view partly
in section, the said Figs. being drawn to a larger scale than the Figs. on sheet 1.
The frame A of the apparatus is made capable of being readily secured to and removed
from the rim of the upper part a¹ of the cylindrical casing a within which the
paper is applied. The frame is made with two steady pins or studs B which lio
against the inner circumference of the casing a while a pinching scrow C passing
through a projection D on the frame serves to bind the frame to the casing. A disc E
is carried by a shaft F mounted in a sleeve bearing G, carried by a bracket projecting
from the frame A and the said shaft can be rotated from a hand wheel H. on the end of
the shaft. I prefer to apply differential gearing between the hand wheel and the shaft
so as to rotate the shaft and disc E slowly in comparison with the speed of the hand
wheel. This object is effected in the present instance by fixing a spur wheel I on the
end of the sleeve bearing G. Another spur wheel J is placed alongside of and in
contact with the spur wheel I both wheels gearing with a pinion k running loosely on
a stud on the hand wheel H. A difference of say one tooth exists between the
wheel I and the wheel J the wheel I having say 100 teeth and the wheel J 99 teeth.
As the hand wheel H is rotated the pinion k deriving motion from the fixed wheel I
causes the wheel J to advance by one tooth to each revolution of the hand wheel the
shaft F and disc E being therefore rotated to that extent. A tracer L projects
from the link M against the face of the disc E the link M being connected by links N,
with fixed points 0, 0¹ on the frame A in such a manner as to ensure the parallel rise
and fall of the tracer L. A paper disc is applied to the face of the disc E and is
secured thereto by the screw P. When it is desired to use the analyzer it is fixed to
the top of the casing a¹ and opposite to wherever the tracer carrier shown in sheet 1
of the drawings happens to be. The foot of the link M is placed upon the top of the
tracer carrier so as to partake of its up and down movements. When all is prepared the
tracer L on the link M is set up against the paper on the disc E and the hand wheel H
is turned in unison with the crank of the engine. As the disc rotates much more
quickly than the traverse of the clock work in the casing a the markings of the
tracer L are correspondingly wider apart than the markings of the tracers r²² &c.
on the tracer carrier beneath and can be easily read. The differential gearing between
the hand wheel H and the shaft and disc E might if desired be dispensed with or
where the apparatus is made with differential gearing as shown on the drawings the
analyzer may be used without the gearing by sliding the pinion K out of gear and
binding the hand wheel to the spur wheel J by means of the pinching screw Pl.
When this is done the shaft and disc can be rotated direct by turning the hand wheel.
Where it is desired to secure exact unison between the motion of the engine and the
analyzer I may pass a band or cord from a reciprocating or revolving part of the
engine around the pulley Q on the hand wheel. When the said cord is attached to a
reciprocating part of the engine it would act in the same manner as the cord which
actuates the ordinary "Richards" indicator the recoil being effected by a weight, a
spring, or the free end of another band could be held in the hand and pulled against
the pull of the working band. By the latter means a diagram would be taken in the
form of a loop, showing the fluctations during one revolution of the engine. The
invention is applicable in recording speeds other than the speed of prime movers.
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 speed recorder of the indicated construction the tracer bar 9 carrying
seven or a greater or less number of tracers r³, r², &c., cne such tracer being provided
for each working day of the period of time provided for on the paper, in combination
with the means for periodically turning the said tracer bar whereby the tracers are
presented in successive order to the slip of paper fixed inside the case a¹ to receive the
record substantially as hereinbefore described and shown.

page_text: (2) In a speed recorder the tracer bar q carrying a number of tracers, the ratchet
wheels the pawl tand the fixed stop r upon the cylindrical case a¹ substantially as
and for the purpose set forth and indicated.
(3) In a speed recorder the bar or spindle q carrying a number of tracers which
are brought into use successively by automatically rotating the said bar substantially
as set forth and indicated.
(4) The record analyzing apparatus for use in conjunction with speed recorders of
the indicated construction or of a construction permitting of the application of such
an analyzer, the said analyzer consisting of a metal disc E, rotated or reciprocated
either directly or through the medium of differential gearing consisting of spur
wheels I and J and pinion K from a hand wheel H which is operated in unison with
the crank of the engine cither by hand or by a band or cord from a reciprocating part
of the engine substantially as hereinbefore described and shown.
Dated this 15th day of Annil 1887
DUTTON & FULTON,
1, St. James Square, Manchester.
Agents.