IMPROVEMENTS IN MACHINERY OR APPA- RATUS FOR REGISTERING THE NUMBER OF STROKES PER MINUTE, PER DAY, AND PER WEEK OF ANY DESCRIPTION OF ENGINE OR OTHER MACHINERY TO WHICH IT MAY BE APPLIED
Year: 1875

page_text: LETTERS PATENT to Benjamin Walker Clegg, of Leeds, in the County
of York, for the Invention of "IMPROVEMENTS IN MACHINERY OR APPA-
RATUS FOR REGISTERING THE NUMBER OF STROKES PER MINUTE, PER DAY, AND
PER WEEK OF ANY DESCRIPTION OF ENGINE OR OTHER MACHINERY TO WHICH IT
MAY BE APPLIED."
Sealed the 16th October 1875, and dated the 17th April 1875.
PROVISIONAL SPECIFICATION left by the said Benjamin Walker Clegg
at the Office of the Commissioners of Patents, with his Petition, on
the 17th April 1875.
I, BENJAMIN WALKER CLEGG, of Leeds, in the County of York, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
MACHINERY OR Apparatus for Registering the Number of STROKES Per Minute,
PER DAY, AND PER WEEK OF ANY DESCRIPTION OF ENGINE OR OTHER MACHINERY TO
WHICH IT MAY BE APPLIED," to be as follows :-
This Invention relates to apparatus used for the purpose of counting

page_text: machines, and it has for its objects improved arrangements of mechanism
by which the number of revolutions of such engine or machine during
any desired period of time, such as an hour, a day, or a week, is shewn
upon a dial, as well as the number of revolutions per minute, and so that
an observer can see at once whether the engine or machine has been
working at its proper speed or has been gaining or losing during such
period of time.
I take a suitable framework or case provided with bearings in which
are arranged two revolving spindles, which I prefer to make concentric,
one revolving within the other, which is tubular; and upon one extre- 1
mity of the inner spindle I fix an index hand or pointer, which points
out upon an external dial plate the number of revolutions per minute
which are made by the engine or machine. The spindle carrying this
index hand is connected to the engine or machine by means of toothed
wheels so proportioned that when the engine is working at its proper ]
speed the index hand makes one revolution per minute. Upon the outer
end of the tubular concentric spindle above described another index
hand is fixed, which points out upon the same dial plate, but preferably
upon a graduated circle of greater diameter, the number of revolutions
which the engine or machine has accomplished during the desired period?
of time (an hour, a day, a week, or other period).
In order to actuate the tubular spindle with the larger index hand
attached to it as described, I form or attach to the inner spindle first
described an endless screw or worm, which worm works a worm wheel
fixed upon a transverse spindle working in bearings in the framework,
and upon this transverse spindle I also form or attach an endless screw
or worm which works a worm wheel fixed upon a spindle revolving in
bearings parallel to the concentric spindle first described. Upon this
parallel spindle I fix a toothed wheel which actuates a corresponding
toothed wheel having the same number of teeth and fixed upon the
tubular spindle which carries the large index hand, as first described.
The two toothed wheels last described are not geared directly together,
but with the intervention of an intermediate wheel having any con-
venient number of teeth, which revolves freely upon a suitable stud or
bearing upon the framework of the apparatus.
The number of teeth upon the worm wheels are so proportioned that
the tubular spindle carrying the large index hand makes one revolution
during a weck, or such other period of time as may be desired.

page_text: The outer dial may be divided into a number of divisions corrc-
sponding with the periods of time the revolutions of the engine or
machine during which it is desired to indicate; those parts of such
periods in which the engine or machine is intended to remain at rest
(such as the breakfast time or dinner time of workpeople employed)
being omitted from the divisions upon the dial plate. Suppose, for
example, that my improved apparatus is to be applied to a steam engine
driving the machinery of a factory, and when working at its proper
speed making 37 revolutions per minute, and that the period of time
indicated by one revolution of the larger index band is one working
week, the smaller dial is divided into 37 parts, and the spindle carrying
its index hand is connected to the engine so that it makes one revolution
for each 37 revolutions of the engine. The outer dial is divided into six
parts, each representing one day of the working week, and each of a
length proportioned to the time during which the engine should be at
work during that particular day.
The several spaces may be subdivided into smaller divisions repre-
senting hours, quarters of hours, or fractions of quarters of hours.
Supposing the engine to start from zero at 6 o'clock on Monday
morning and to stop at 5 o'clock in the evening, with intervals
between 8 and 9 o'clock and 12 and 1 o'clock of half an hour and one
hour respectively, the division representing Monday on the dial plate
will be divided into corresponding proportions, and if the engine has
made its proper number of revolutions the index hand will at 5 o'clock
have exactly reached the dividing line between the divisions repre-
senting Monday and Tuesday, and at any time it can be seen whether
the engine has exceeded or been deficient in its proper number of revo-
lutions. The remaining five days of the working week are similarly
divided into parts corresponding to those periods during each when the
engine is required to be at work.
I make suitable provision for bringing one or both of the index hands
to any point when desired; and instead of the dial plates being con-
centric they may be arranged side by side or in any other convenient
position, the endless screws and wheels being arranged accordingly.
An ordinary clock may be placed in the neighbourhood of the appa-
ratus for the purpose of comparison.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Benjamin Walker Clegg in the Great Seal Patent
Office on the 16th October 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, BENJAMIN
WALKER CLEGG, of Leeds, in the County of York, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventeenth day of April, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and succes-
sors, give and grant unto me, the said Benjamin Walker Clegg, Her special
licence that I, the said Benjamin Walker Clegg, my executors, admini-
strators, and assigns, or such others as I, the said Benjamin Walker
Clegg, 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 Ircland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN MACHINERY OR APPARATUS FOR REGISTERING THE NUMBER OF
STROKES PER MInute, per Day, AND PER WEEK OF ANY DESCRIPTION OF ENGINE OR
OTHER MACHINERY TO WHICH IT MAY BE APPLIED," upon the condition (amongst
others) that I, the said Benjamin Walker Clegg, my executors or
administrators, by an instrument in writing under my, or their, or
one of their hands and scals, 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 Benjamin Walker Clegg, do hereby
declare the nature of my said 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 (that is to
say):
This Invention relates to apparatus used for the purpose of counting
or indicating the number of revolutions made by steam engines or other
engines or machines, and it has for its objects improved arrangements
of mechanism by which the number of revolutions of such engine or

page_text: machine during any desired period of time, such (for example) as an
hour, a day, or a week, is shewn upon a dial, as well as the number of
revolutions per minute, and so that an observer can see at once whether
the engine or machine has been working at the desired speed or has been
gaining or losing during such period of time.
In order to put my Invention into operation I take a framework or
case of iron or other suitable material provided with bearings in which
are arranged two revolving spindles, which I prefer to make concentric,
one being tubular and the other one revolving within it; and upon one
extremity of the internal spindle I form or fix an index hand or pointer,
which points out upon an external dial plate the number of revolutions
per minute which are made by the engine or machine to which the
apparatus is applied. The spindle which carries this index hand, as
described, is connected to the engine or machine by toothed wheels so
proportioned that when the engine is working at its proper speed tho
index hand makes exactly one revolution per minute. Upon the outer
end of the tubular concentric spindle above described (within which the
spindle just described works) another index hand or pointer is fixed,
which in its revolution points out upon the same dial plate, but pre-
ferably upon a graduated circle of larger diameter, the number of
revolutions which the engine or machine has made during the desired
period of time (such as one hour, day, or weck).
In order to actuate the spindle with its index hand for this purpose I
form upon or attach to the inner spindle an endless screw or worm,
which drives a worm wheel fixed upon a transverse spindle working in
bearings in the framework, and upon this transverse spindle I form or
attach another endless screw or worm which drives a worm wheel fixed
upon a spindle revolving in bearings parallel to the concentric spindle
first described, and upon this parallel spindle I fix a toothed wheel
which gears with and drives a corresponding toothed wheel having the
same or other requisite number of teeth and fixed upon the tubular
spindle which carries the larger index hand, as already described. I prefer
however that the two toothed wheels last described should not be geared
directly together, but with the intervention of an intermediate wheel
having any convenient number of teeth, which revolves upon a suitable
stud or bearings in the framework of the apparatus.
I make the number of teeth unon the worm wheels of such proportion.

page_text: that the tubular spindle carrying the large index hand makes one revo-
lution during one week or such other period as may be desired.
I divide the outer dial into a number of divisions corresponding with
the respective length of the particular periods of time during which it is
desired to indicate the number of revolutions of the engine or machine,
but I omit from the divisions upon the dial plate the parts which cor-
respond with those portions of such periods in which the engine or
machine is intended to remain at rest (such, for example, as the break-
fast time or dinner time of workpeople employed). Suppose, for instance,
that my Invention is to be applied to a steam engine driving the
machinery of a factory which when working at its proper speed makes
37 revolutions per minute, and that the period of time indicated by one
revolution of the larger index hand is one working week, I divide the
smaller dial into 37 parts, and the spindle carrying its index hand is
connected to the engine so that it makes one revolution for every 37
revolutions of the latter. I divide the outer dial into six parts, each
representing one day of the working week, and each of a length propor-
tioned to the time during which the engine should be at work during
that particular day.
The several spaces may be subdivided into smaller divisions repro-
senting hours, quarters of hours, or fractions of quarters of hours.
The apparatus being prepared in the way described, if the engine
starts at 6 o'clock on Monday morning, the indicator hands being at
zero, and stops at 5% o'clock in the evening, with intervals between 8
and 9 o'clock and 12 and 1 o'clock of half an hour and one hour respec-
tively, the division representing Monday on the dial plate will be divided
in corresponding proportions, and if the engine has made its proper
number of revolutions the index hand will at 5 o'clock have exactly
reached the dividing line between the spaces representing Monday and
Tuesday respectively, and at any time it can be seen whether the engine
has exceeded or been deficient in its proper number of revolutions. The
remaining five days of the working week are also divided into parts
corresponding with those periods during each day when the engine is
required to be at work.
Sometimes I add a second concentric tubular spindle outside the one
already described, and I attach to it an index hand which points upon
the dial plate the number of revolutions during a still longer period of

page_text: time (such as a month). I drive the tubular spindle and index hand by
means of suitable toothed wheels, actuated by a toothed wheel upon the
tubular spindle first described.
If desired additional tubular spindles and index hands driven by
similar means may be added to shew the number of revolutions during
still longer periods of time.
Instead of the dial plates being concentric they may be arranged side
by side or in any other convenient position, the endless wheels and
screws being arranged accordingly.
An ordinary clock should be placed in the neighbourhood of the appa-
ratus for the purpose of comparison.
In the accompanying Drawings in illustration of my Invention,
Sheet I., Figure 1, is a plan, and Figure 2 a front view of the apparatus
shewing the endless screws and wheels, but without the dial plate. a is
the driving shaft or spindle revolving in bearings in the frame b, and
driven by the engine or machine, the number of whose revolutions is to
be indicated. c is an index hand fixed to the outer end of the spindle a.
The concentric tubular spindle d works upon the spindle a, and carries
at its outer end the index hand e. The endless screw ƒ upon the
spindle a drives the worm wheel 9 upon the transverse spindle h,
which in turn carries the endless screw i, driving the worm wheel k
The toothed wheel m upon
upon the spindle 2, which is parallel to a.
the spindle / drives through the loose intermediate wheel n the toothed
wheel o upon the concentric tubular spindle d, and through it the index
hand e.
In Sheet II. Figure 3 represents a dial plate divided as described, and
having 3 index hands shewing the number of revolutions of the engine
and machine during one minute, one working week, and one working
month. a is the index hand shewing the number of revolutions per
minute; b is the hand shewing the number during the several fractions
of the working days of a week; and c is the hand shewing the number
during the working days of one month.
Having now described my Invention and the manner in which it is to
be performed, I claim,—
The general arrangement of the apparatus, substantially as described
and shewn in the Drawings.

page_text: Also, the methods of actuating the index hands, substantially as and
for the purposes described and shewn in the Drawings.
the
Also, the methods of dividing the dial plate, substantially as and for
purposes described and shewn in the Drawings.
In witness whereof, I, the said Benjamin Walker Clegg, have 5
hereunto set my hand and seal, this Fifteenth day of October,
in the year of our Lord One thousand eight hundred and seventy-
five.
BENJAMIN WALKER CLEGG. (L.S.)