MENTS IN SPEED INDICATORS
Year: 1884

page_text: I JOHN BROWN MOSCROP of Lorne Villa, Urinston, in the County of Lancaster,
Consulting Engineer, do hereby declare the nature of my Invention for IMPROVE-
MENTS IN SPEED INDICATORS to be as follows:-
The first part of this Invention refers to improvements upon that class of
recorder for which Letters Patent No 1321 were granted to me on the 24th day
of, March 1881 and consists in additional mechanism applicable to such recorder
whereby a more distinct, detailed and extended record of the performance of a
steam engine or other motor or mechanism driven thereby can be obtained either
temporarily or continuously than has hitherto been produced.
By these means and without interrupting the ordinary record which goes on as
usual, a second and simultaneous record is obtained which is an analysis of the
original record for a more or less limited period.
In carrying out this part of my invention I mount a drum upon a bracket at the
back of the machine and communicate revolving motion thereto by an endless cord
or band or by spur or other gearing direct from the vertical driving spindle of the
recorder with means for adjusting the speed to meet the necessities of the case.
This drum carries by preference an endless strip of paper upon which the extended
record is to be obtained and which strip is kept distended and prevented slipping
by suspending a flanged roller of sufficient weight in that part of the endless strip
of paper hanging down from the drum, or the strip of paper may be in a continuous
length and be drawn off a creel in a similar manner to the recording paper hitherto
employed in my improved recorder.
such
It will now be apparent that if this strip of paper has an accellerated speed
imparted to it as compared with the other recording paper actuated by the clock
mechanism it is only necessary to have a pencil or other marker attached to the
rear extremity of an extension of the existing recording rod to obtain upon
endless strip of paper the more distinct, detailed and extended report of the
performance of the engine or other motor or mechanism the speed of which is being
tested, such extension of the recording rod can also be so arranged that by being
flexible and provided with a sliding adjustable weight the pressure of the pencil or
other marker upon the paper can be regulated to the greatest nicety and thus
prevent the possibility of the sensitiveness of the weighted levers being affected.
This invention also refers to the construction of a simpler arrangement of
mechanism for recording the performance of an engine or other motor or mechanism

page_text: driven thereby, entirely apart from and without reference to time and consists in
the employment of a modification of the same arrangement of mechanism as herein-
before described but without the clock mechanism and recording paper hitherto
actuated thereby.
In carrying out this part of my Invention I employ the vertical spindle driven
by an endless strap from the shaft of the engine or other motor or mechanism
whose performance is to be recorded and carrying the weighted levers and
mechanism for actuating the bell crank lever and recording rod as described in
my former Specification, but instead of the clock mechanism for operating the
paper drum I drive the same from the vertical spindle in the manner herein before
described in the first part of my present invention and thus I can obtain a record
of any variation of the speed of the vertical spindle and hence a record of the
performance of the mechanism from which it is driven.
JOHN G. WILSON,
Agent for Applicant.

page_text: I JOHN BROWN MOSCROP of Lorne Villa Urmston, Lancashire, Consulting
Engineer do hereby declare the nature of my 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 :-
The first part of this invention refers to improvements upon that class of
Recorder for which Letters-Patent No 1321 were granted to me on the 24th day
of March 1881 and consists in additional mechanism applied to such recorder
whereby a more distinct detailed and extended record of the performance of a
steam engine or other motor or mechanism driven thereby can be obtained either
temporarily or continuously than has hitherto been produced.
And in order that this my said invention may be the more readily understood
and carried into practical effect I have hereunto annexed a drawing, upon which
Fig. 1 illustrates a side view of my improved additional mechanism shewing the.
same applied at the back of (what is hereinafter called) my original rècorder-the
subject of Letters Patent N° 1321 A.D. 1881 as aforesaid.
In carrying out this part of my invention. I mount a drum a upon a bracket b,
affixed by the wing-nut and bolt c or in any other convenient manner, at the back
of the casing d of my original recorder. To this drum I communicate revolving
motion from the central vertical spindle L of my original recorder, by an endless
cord or band passing round the adjustable grooved speed pullies e and f-the
pulley e being mounted upon the said central spindle L whilst the pulley f actuates
the worm and worm-wheel f¹ and through the spur-gearing f2 so reduces the speed
and communicates revolving motion to the drum a. Although I have shewn the
combination of grooved speed pullies and spur and other gearing as a means of
driving my additional mechanism, it will be evident that there are many other
equally advantageous modes of gearing the drum to the central driving spindle.
The drum a carries by preference an endless strip of paper h upon which the
extended record is to be obtained and which strip is prevented travelling sideways
by the studs and is kept distended and prevented slipping by suspending a
flanged roller i of sufficient weight in that part h¹ of the endless strip of paper
hanging down from the drum as illustrated or the strip of paper may be in a
continuous length and be drawn off a creel for instance in a similar manner to the
recording paper hitherto employed in my original recorder.
It will now be apparent that this strip of paper h having an accellerated speed
imparted to it, as compared with the other recording paper in my original recorder
actuated by the clock mechanism it is only necessary to have a pencil or other
marker attached to the rear extremity of an extension % of the existing recording
rod to obtain upon such endless strip of paper h the more distinct, detailed and
extended report of the performance of the engine or other motor or mechanism the
speed of which is being tested.
The extension of the recording rod k is rendered flexible and adjustable by being
secured to the main recording rod Q by flexible side bars or wires k¹ and is also
provided with a sliding adjustable weight -by which means the pressure of the
pencil or other marker j upon the paper h can be regulated to the greatest nicety
and thus prevent the possibility of the sensitiveness of the weighted levers L³ of
the original recorder being affected.

page_text: By means of this additional mechanism and without interrupting the ordinary
record which goes on as usual, I thus obtain a second and simultaneous record
which is an analysis of the original record for a more or less limited period.
This invention also refers to the construction of a simpler arrangement of
mechanism for recording the performance of an engine or other motor or mechanism
driven thereby, entirely apart from and without reference to time and consists in
the employment of a modification of the same arrangement of mechanism as herein-
before described but without the clock mechanism and recording paper hitherto
actuated thereby as described in the Specification of my original recorder.
Fig 2 of the accompanying drawing represents a front view of my modified
recorder Fig 3 is a partial plan and Fig 4 an end view of part of Fig 2.
In carrying out this part of my invention I employ a vertical spindle m driven
by an endless strap passing round the pulley n from the shaft of the engine or
other motor or mechanism whose performance is to be recorded and carrying the
weighted levers o and mechanism for actuating the bell-crank lever p and recording
rod q as described in my former specification, but instead of the clock mechanism
for operating the paper drum, I traverse the paper strip for receiving the record-
as I will now proceed to describe :-I employ a pair of rollers and the lower
roller being geared by the spur gearing s and worm and worm-wheel t to the
adjustable grooved speed pulley u which receives its motion in turn by an endless
cord or band passing round the corresponding grooved speed pulley v on the
vertical spindle m—and the upper roller ¹ being pressed down upon the lower
roller by the action of the curved spring w.
Between these rollers and the strip of recording paper a is passed being
supported at each extremity by weights y over the wire frame or support z to
distend and prevent the same coming in contact with the mechanism-or the said
paper may be drawn off a creel as herein before described.
It will be observed that previous to passing between the rollers 7 and r¹ the said
paper is caused to pass in the direction of the arrows over a fixed plate or
tablet and that it is whilst passing over this stationary plate that the necessary
pencil or other marker 1 performs its function upon its upper surface. I prefer this
arrangement to that of taking. the record upon the paper whilst passing over a
cylindrical surface.
In this manner I obtain upon the strip of paper x a record of any variation of
the speed of the vertical spindle m and hence a record of the performance of the
mechanism from which it is driven.
Having thus 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
1st The application of the additional mechanism to my original recorder whereby
a more distinct, detailed and extended report of the performance of a steam engine
or other 'motor can be. obtained either temporarily or otherwise substantially as
herein before described and illustrated on the accompanying drawing.
2nd The general combination and arrangement of mechanism constituting a
recorder of the performance of an engine or other mechanism independent of
time substantially as hereinbefore described and illustrated on the accompanying
drawing.
3rd The mode of mounting and operating the paper strip in recording mechanism
by preference in an endless form and of keeping the same distended substantially
as hereinbefore described and illustrated on the accompanying drawing.