Improvements in Horse-power Gauges.
Year: 1890

page_text: Date of Application, 21st Jan., 1890
Complete Specification Left, 21st Oct., 1.90-Accepted, 22nd Nov., 1890
FRUVIDIUNAL SPECIFICATION.
Improvements in Horse-power Gauges.
I, KARL LEVERKUS, of 3 Herbert Street, Moss Lane East, Manchester, in the
County of Lancaster, Engineer, do hereby declare the nature of this invention to
be as follows:-
:-
This invention consists in certain modifications of and improvements in the
horse power gauge for which I applied for Letters Patent No. 11250 of 13th July
1889.
This
Instead of two single pistons and two cylinders as therein described I now
employ one piston A and one cylinder B as shown on Fig. 1 of the accompanying
drawing. This cylinder B is open on either side for the admission of steam from
the respective side of the steaui cylinder of the engine. Also instead of a spring
enclosed in a movable cylinder I now employ a free helical spring D which is
attached at one end to a movable crosshead D2 and at the other to a collar D'
fixed on the piston rod for the purpose of attaining a mean pressure.
spring is arranged for compression during one stroke of the steam piston of the
engine and for extension on the other stroke. Also instead of the arrangement of
the piston rod with the side rods shown on the drawings accompanying the Pro-
visional Specification to my said previous Patent I now employ a long piston
rod and two separate cross levers E and E Fig. 1 so as to avoid all friction in
the hearings of the piston rod and to render the horse power gauge as exact as
possible. When the piston rod C rises the action of the steam upon the piston is
transmitted through the head C and the piece E³ to the lever E4 which has its
fulcrum at E so that through the rod G₁ the main lever arm H¹ is also pushed
forward. When the piston rod C descends its head C₁acts upon the piece E2
thus moving the lever E and through the rod G the other main lever arm H.
It will thus be seen that in both cases the main lever H H is always moved
forward in one direction only while the piston rod C goes up and down. In
order to cause the levers E and E to follow the variations of the pressure oxercised
This
by the head an adjustable spring F is provided under the lever E.
spring is arranged for drawing the two levers E and E' together and so draw
down the lever H H' and if no steam is admitted to the cylinder B it will cause
the head to be enclosed between the two pieces E2 and E3 so that it cannot
move until again acted upon by steam pressure as before described.
The length
of the rods G and G₁ can be adjusted by any suitable means.
main lever H H' thus attained is transmitted as shown in Fig. 2 through a third
lever arm H³ on the same shaft H2 to a lever K by means of a rod I. This rod I
carries two adjustable pieces I¹ and 12 against which the sleeve H held by the
lever H³ pushes. If the mean pressure of the steam rises the sleeve H* will act
upon the piece I' thus moving the rod I and the lever K forward in one direction.
On the other hand if the mean pressure sinks the sleeve H* will by pushing against
the piece I move the rod I and the lever K in the opposite direction.
pieces I¹ and 12 are so adjusted as to allow the sleeve H a certain free space
corresponding to the average variations of the mean pressure. To prevent the
lever K from vibrating a segment K' is provided on its shaft K and also a brake L
which is kept pressing against the segment by an adjustable spring L.
the shaft K there also a counterweight K2 placed to balance all the parts up
to the pointer of the horse power gauge. The pressure of the brake Ĺ on the
The motion of the
The
On
segment K is varied by means of a small lever L which is moved coincidently
with the lever Y shown in Fig. 5 and hereinafter described. Instead of the brake Ï.
the spring L' and the segment K' as shown I might employ any other suitable

page_text: form of brake. I provide the horse power gauge with mechanism for the purpose
of enabling the pointer to at once indicate on its dial the proper horse power
without necessitating any calculations that might otherwise be required for variations
in the speed of the engine. This important mechanism has the great advantage
that the horse power gauge can now be used in marine engines and other engines,
where the speed is not uniform but may vary from nil to the maximum.
This mechanism is shown in Fig. 3. On the shaft K₁ there is a curved lever KⓇ
and a straight one K³. On the curved lever K a piece K' is fitted to slide and
it is connected by a movable rod Qwith the lever Q' The motion of the main
lever HHH H³ will then be transmitted through the rod I the lever K, the
shaft K the lever K, the rod Q and the lever Qround the fulcrum Q² to a
toothed segment Q3 geared into a pinion Q4 which latter is fixed on the same
shaft as the pointer of the horse power gauge and therefore also moves the pointer
on its dial. The path through which the lever Q and therefore also the pointer is
moved is regulated by the position of the sliding piece K' on the curved lever K
in accordance with the speed of the engine. To vary the position of the piece K
on the curved lever K an adjustable rod S³ connects the rod Q with a lever S²
which latter is moved round its fulcrum S₁ by another arm S. A lever T see
Fig. 4 outside the horse power gauge acted upon by the governor of the engine
moves through its shaft T2 a small lever R see Fig. 3 which is connected through
a rod R and its adjustable piece R2 with a lever S mentioned above. In cases
where the engines are not provided with automatic expansion gear the lever T
Fig. 4 would not be connected with the governor and therefore the lever R, the
rod R with its piece R2 and the lever S are omitted while a special lever outside
the horse power gauge and connected with the governor (or with a velocimeter in
cases where the speed of the engine is not uniform such as in marine engines and
so on) is placed on the shaft S see Fig. 3 for the purpose of moving the lever S²
by means of a rod S₁ and a lever S³. The rod S³ will then move the sliding
piece K' either along a part of the curved lever K according to the variations
of the speed of the engine or it may move the sliding piece K' along the whole
length of the curved lever K up to the fulcrum K if the speed of the engine
varies between nil and a certain maximum.
In order to simplify the horse power gauge and to render it reliable and durable
1 dispense with the two automatic arrangements shown on the drawings of my
said previous Patent and adopt a simpler arrangement and also employ screw
spindles in place of the racks with brakes for the purpose of varying the slotted
link rods in their respective positions. The movable crosshead D2 Fig. 1 to which
the main spring D is attached is driven up and down as follows:-
A lever U see Fig. 4 is moved by means of a rod from the crosshead of the
engine or from any part of the engine that has a motion coincident with that of
the piston. This lever U having its fulcrum at U moves a lever U2 and through
a rod U³ a slotted link V. A rod V2 is made to slide in the slotted link V
through the rod T by means of a lever T³, a rod T4, a lever T5, and a rod or
guide T6.
As already stated above in cases where the engine is provided with an
automatic expansion gear the lever T is acted upon from the governor by means
of a rod. For engines without automatic expansion gear the lever T is connected
according to circumstances with the expansion gear regulated by hand or otherwise.
The motion of the rod V2 thus derived from the lever U and regulated by the
lever T is transmitted through a lever V³ a shaft V* a lever W Fig. 5, a rod W
to a second slotted link W2 and a rod W which latter drives the crosshead D2 and
the main spring D. The stroke of the crosshead D2 is regulated by the position
of the rod W in the slotted link W2 according to the mean pressure of the steam.
A rod or guide X is provided for sliding the rod W in the slotted link W2 and
is held by a lever Y. The rod K Fig. 3 is connected with a nut M¹ on a
spindle M by means of rods M. The spindle M2 is provided with a suitable
friction or clutch coupling M³ with two discs or wheels which coupling is driven
from a pulley outside the horse power gauge. Further the spindle M² is put in

page_text: gear with a shaft N by means of wheels M* and N¹. The shaft N is again geared
by means of bevel wheels N2 and 01 with a shaft O and through bevel wheels O²
and P with a screw spindle P¹, Fig. 5. The screw spindle P₁ serves through its
nut P the lever Y and the guide X to vary the slotted link rod W in its
position. The two screw spindles M2 Fig. 3 and P¹, Fig. 5 are so arranged that
the path through which the lever K³, see Fig. 3 is moved is in proportion to the
path through which the lever Y, Fig. 5 requires to be moved.
When the pointer is at the zero point the lever K, Fig. 3 is at the position K³ and the
slotted link rod W4 Fig. 5 is in the position W³. When the mean pressure rises the
lever K proceeds from the left to the right and thereby presses through the rods M and
the nut M¹ the spindle M2 forward so that the one disc or wheel of the friction or clutch
coupling M³ is engaged to run in one direction and to turn the screw spindle M² drawing
it out of the nut M until the latter is no more pressed forward by the lever K and
the disc or wheel engaged now becomes disengaged. At the same time by means
of the wheels M, N1, N2, O' the shaft O the bevel wheels 02 and P the screw
spindle P is put in motion to move the slotted link rod W* forward. When the
mean pressure sinks the other of the two discs or wheels of the friction or clutch
coupling is made to turn the two screw spindles M2 and P in the respective
opposite directions so as to cause the pointer and the slotted link rod W₁ to go back.
All the various parts mentioned above I arrange in a convenient manner con-
necting them together through suitable means making the horse power gauge self
contained.
In cases where the engine has a fixed degree of expansion or where this degree
does not vary much the whole arrangement shown in Fig. 4 may be omitted and
a lever similar to the lever U is attached to the shaft V4 Fig. 5, for the purpose
of moving direct the slotted link and the rod W with the crosshead D2 and
the spring D.
°
Dated this 20th day of January 1890
H. B. BARLOW,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Horse-power Gauges.
I, KARL LEVERKUS, of 3 Herbert Street, Moss Lane East, Manchester, 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 :-
This invention consists in certain modifications of and improvements in the horse
power gauge protected by Letters Patent No. 11250 granted to me and dated the
13th July 1889.
I will now proceed to describe my invention having reference to Figs. 1 to 5 of the
drawings left with my Provisional Specification and also to Figs. 6 to 13 on the
drawings accompanying this my Complete Specification.
Instead of two single pistons and two cylinders as described in the Specification of
my said previous Patent I now employ one piston A and one cylinder B as shown on
Fig. 1. This cylinder B is open on either side for the admission of steam from the
respective side of the steam cylinder of the engine. Also instead of a spring enclosed
in a movable cylinder I now employ a helical spring D which is attached at one end
to a movable crosshead D2 and at the other to a collar D¹ fixed on the piston rod C
for the purpose of attaining a mean pressure. This spring is arranged for compression
during one stroke of the steam piston of the engine and for extension on the other
stroke. Also instead of the arrangement of the piston rod with the side rods shown
on the drawings accompanying the Specification to my said previous Patent I now
employ a long piston rod C and two separate cross levers E and E, Fig. 1, so as to
avoid all friction in the bearings of the piston rod and to render the horse power
gauge as exact as possible. When the piston rod C rises the action of the steam upon

page_text: the piston is transmitted through the head C¹ and the piece E³ to the lever E* which
has its fulcrum at Es so that through the rod G¹ the main lever arm H' is also pushed
forward. When the piston rod ů descends its head C acts upon the piece E thus
moving the lever E and through the rod G the other main lever arm H. It will thus
be seen that in both cases the main lever H H¹ is always moved forward in one
direction only while the piston rod C goes up and down. In order to cause the
levers E and E to follow the variations of the pressure exercised by the head Can
adjustable spring F is provided under the lever E. This spring is arranged for
drawing the two levers and E together and to draw down the lever H H and if
no steam is admitted to the cylinder B the spring will cause the head C¹ to be enclosed
between the two pieces E2 and E³ so that it cannot move until again acted upon by
steam pressure as before described. The motion of the main lever H H thus attained
is transmitted as shown in Fig. 2 through a third lever arm H³ on the same shaft H2
to a lever K by means of a rod I. This rod I carries two adjustable pieces I¹ and I²
against which the sleeve H4 held by the lever H³ pushes. If the mean pressure of
the steam rises the sleeve H will act upon the piece I' thus moving the rod I and the
lever K forward in one direction. On the other hand if the mean pressure sinks
the sleeve H¹ will by pushing against the piece 12 move the rod I and the lever K in
the opposite direction. The pieces I' and 12 are so adjusted as to allow the sleeve H*
a certain free space corresponding to the average variations of the mean pressure.
To prevent the lever K from vibrating a segment K' is provided on its shaft K* and
also a brake L which is kept pressing against the segment by an adjustable spring L'.
On the shaft K there is also a counterweight K2 placed to balance all the parts up to
the pointer of the horse power gauge. The pressure of the brake L on the segment K¹
is varied by means of a small lever L2 which is moved coincidently with the lever Y
shown in Fig. 5 and hereinafter described.
I provide the horse power gauge with mechanism for the purpose of enabling the
pointer to at once indicate on its dial the proper horse power without necessitating
any calculations that might otherwise be required for variations in the speed of the
engine. This important mechanism has the great advantage that the horse power
gauge can now be used in marine engines and other engines where the speed is not
uniform but may vary from nil to the maximum.
This mechanism is shown in Fig. 3. On the shaft K* there is a curved lever K
and a straight one K. On the curved lever K a piece K7 is fitted to slide and it is
connected by a movable rod Q with the lever Q. The motion of the main
lever H H H³ will then be transmitted through the rod I the lever K the shaft K* the
lever K the rod Q and the lever Q' round the fulcrum Q2 to a toothed segment Q³
geared into a pinion Q which latter is fixed on the same shaft as the pointer of the
horse power gauge and therefore also moves the pointer on its dial. The path through
which the lever and therefore also the pointer is moved is regulated by the position
of the sliding piece K' on the curved lever K in accordance with the speed of the
engine. To vary the position of the piece K7 on the curved lever K an adjustable
rod S³ connects the rod Q with a lever S2 which latter is moved round its fulcrum S¹
by another lever S. A lever T, see Fig. 4, outside the horse power gauge acted upon
by the governor of the engine moves through its shaft T2 a small lever R, see Fig. 3,
which is connected through a rod R' and its adjustable piece R2 with the lever S
mentioned above. The piece R2 is so adjusted on the curved lever S (see Fig. 10)
that the rod will be moved through a path of the required length in accordance
with the variations in the speed of the engine.
In cases where the engines are not provided with automatic expansion gear the
lever T, Fig. 4, would not be connected with the governor and therefore the lever R,
the rod R with its piece R² and the lever S are omitted while a special lever (S7 in
Fig. 6 and Figs. 12 and 13) outside the horse power gauge and connected with the
governor (or with a velocimeter in cases where the speed of the engine is not uniform
such as in marine engines and so on) is placed on the shaft Se, Fig. 3, for the purpose of
moving the lever S2 by means of a rod S4 and a lever S. The rod S3 will then move the
sliding piece K' either along a part of the curved lever K according to the variations

page_text: of the speed of the engine or it may move the sliding piece along the whole lengt
of the curved lever K up to the fulcrum K* if the speed of the engine varies between
nil and a certain maximum.
In order to simplify the horse power gauge and to render it reliable and durable I
dispense with the two automatic arrangements shown on the drawings of my said
previous Patent and adopt a simpler arrangement and also employ screw spindles in
place of the racks with brakes for the purpose of varying the slotted link rods in their
respective positions as follows:-
A lever U, see Fig. 4, is moved by means of a rod from the crosshead of the engine
or from any part of the engine that has a motion coincident with that of the piston.
This lever U having its fulcrum at U¹ moves a lever U2 and through a rod U³ a slotted
link V. In accordance with the degree of expansion a rod V2 is made to slide in the
slotted link V through the lever T by means of a lever T³ a rod T* a lever T' and a rod
or guide T. As already stated above in cases where the engine is provided with an
automatic expansion gear the lever T is actuated from the governor by means of a
rod. For engines without automatic expansion gear the lever Tis connected according
to circumstances with the expansion gear regulated by hand or otherwise. The motion
of the rod V2 thus derived from the lever U and regulated by the lever T is transmitted
through a lever V3 a shaft V a lever W, Fig. 5, a rod W₁ to a second slotted link W2
and a rod W4 which latter drives the crosshead D2 and the main spring D. The
stroke of the crosshead 12 is regulated by the position of the rod W₁ in the slotted
link W2 according to the mean pressure of the steam. A rod or guide X is provided
for sliding the rod W4 in the slotted link W2 and is held by the lever Y. The rod K
Fig. 3, is connected with a nut M₁ on a spindle M² by means of rods M. The
spindle M² is provided with a clutch coupling M³ between the two wheels M³ and Mo,
see Fig. 10, which latter are held by the bearings N³ and N₁ and are geared into a
wheel M. This wheel M' is constantly driven through the shaft M³, Fig. 11, by the
pulley M outside the horse power gauge and an endless rope Mio. Further the
spindle M2 Fig. 3 is put in gear with a shaft N by means of wheels M' and N¹.
The shaft N is again geared by means of bevel wheels N2 and 0¹ with a shaft O and
through bevel wheels O2 and P with a screw spindle P' Fig. 5. The screw spindle P₁
serves through its nut P2 the lever Y and the guide X to vary the slotted link rod W₁
in its position. The two screw spindles M2 Fig. 3, and P1, Fig. 5, are so arranged that
the path through which the lever K', see Fig. 3, is moved is in proportion to the path
through which the lever Y Fig. 5, requires to be moved.
When the pointer is at the zero point the lever K, Fig. 3, is at the position K³ and the
slotted link rod W Fig. 5, is in the position W³. When the mean pressure rises the
lever K proceeds from the left to the right and thereby presses through the rods M
and the nut M' the spindle M² forward so that the one wheel M³, Fig. 10, is engaged
to turn the screw spindle M2 in one direction drawing it out of the nut M' until the
latter is no more pressed forward by the lever K and the wheel M³ now becomes
disengaged. At the same time by means of the wheels M' N' N and O', Fig. 3, the
shaft O, the bevel wheels 02, and P, Fig. 5, the screw spindle P¹ is put in motion to
meve the slotted link rod W forward. When the mean pressure sinks the other of
the two wheels of the clutch coupling, riz., Me Fi. 10, is made to turn the two screw
spindles M2 and P' in the respective opposite directions so as to cause the pointer and
the slotted link rod W to go back.
In cases where the cylinder of the engine has a fixed degree of expansion or where
this degree does not vary much the whole arrangement shown in Fig. 4 may he
omitted and a lever similar to the lever U is attached to the shaft V4, Fig. 5, for the
purpose of moving direct the slotted link W2 and the rod W* with the crosshead D²
and the spring D.
All the various parts mentioned above I arrange in a convenient manner as shown
in Figs. 6 to 13 where similar parts have the same letters as in Figs. 1 to 5. The
The casing Z is closed
horse power gauge is arranged in a casing Z with a cover Z.
Inside
by a bottom Z Figs. 12 and 13, at the back and a glass plate 26 at the front.
the casing Z three plates B B and B held together by means of four screws B"

page_text: Figs. 6 and 8 to 10, are placed and secured to the casing by means of the screws B12
Figs. 9 and 10, and to the bottom Z2 by means of the screws Z³, Figs. 6, 12 and 13.
At the front ends of the screws B" the dial Q7, Fig. 12, is fixed. Of the three plates
one B see Figs. 12 and 13, forms one part with half a cylinder at the inside of the
casing see Figs. 8 and 9, and with a frame B4, Figs. 9, 12 and 13, which latter carries
a separate casing B'. In the casing B' there is a cylinder B, Fig. 9, fitted, which
through apertures on either end communicates with the two channels Z, to which the
two ends of the cylinder of the engine are connected through tubes 2 by means of
the nuts Z³. Between the casing B₁ and the frame proper B₁ the cylinder B is again
provided with apertures to allow any steam to escape into the space inside the casing Z.
The frame B is closed by means of doors B5 B6 and B7 Figs. 12 and 13 to keep the
steam from the interior of the horse power gauge. The piston rod C goes through
the upper and the bottom ends of the cylinder B and has the same diameter throughout
inside the cylinder. To ensure an exact working of the piston and rod and to avoid
friction a ring B2 is fitted into the bottom of the cylinder B and there secured by
means of a nut B³. The cylinder B itself is secured in the casing B₁ by means of
the nut B¹³. The piston rod C is divided into two parts which are connected by means
of a sleeve and screws C³ Fig. 9. The top end of the rod C is guided in the
bearing C which latter is fixed to the plate B8 by means of the two screws C7, Figs. 9
and 10. As above mentioned the main spring D is attached at one end to a collar D¹
fixed on the piston rod C while at the other end it is attached to the crosshead D² by
means of a piece D° screwed therein and secured by a nut D³. The crosshead D²
extends into the bottom part D³ guided in the bearing formed by the cover B³ and
plate.D (see Fig. 7) and into the top part D7 guided by the bearing D³ (see Figs. 11
and 12) and finally into the back part D between the two guides D Fig. 8. The
spring F Fig. 9 is enclosed in a cylinder inside which it is allowed to slide without
bending itself out of shape. The main levers H H and H³ Figs. 8 and 9 are
preferably made in one piece. The shaft H2 is held by two conical bearings H³,
Figs. 12 and 13, which are arranged for taking up any wear and tear and thus ensure
an exact working of the horse power gauge. The brake L Fig. 9 is fixed upon the
shaft E round which the lever E4 is made to turn freely. The curved lever Kº,
Figs. 10 and 11 may be made to the full lines if the sliding piece K7 requires to
move through a part only of the curved lever while it will have to be made to the
dotted lines if the sliding piece K7 must be moved up to the fulcrum K4. The
shafts S, Qand Q are placed between the plate 18 and a piece S8 fixed to the plate B³.
On the pointer shaft a spring Q8 Fig. 12 is fitted to prevent the pointer from
vibrating unduly as in steam pressure gauges and the like. The slotted link W2
Fig. 8 is placed in a movable frame formed by the two side parts W6, Figs. 8, 12
and 13 and the two rods We secured to the side parts. As this frame is pivoted at W³
it will be seen that the slotted link W2 has its fulcrum at W³. The screw spindle P
Fig. 11 is held by the shaft P. The lever Y Fig. 8 is so shaped as not to collide
with the shaft K. In the half cylinder at the inside of the casing Z openings (shown
by dotted lines) are cut to allow free room to the levers Y.
As mentioned above, in case the arrangement shown in Fig. 4 is omitted a lever
similar to the lever U is attached to the shaft V4 which for this purpose is extended
to the outside and will then move direct the slotted link W2 Fig. S and the rod W*
with the crosshead D² and the spring D. As in this case the pulley M Fig. 11 may
have to get clear of the shaft Vit being necessary that the lever outside be placed
upwards on the shaft V the shaft M8 Figs. 10 and 11 will be lifted while the screw
spindle M2 and the shaft N in Fig. 10 with the lever K³ will have to be arranged in a
suitable manner. As the plate Bio Fig. 12 will be omitted the back ends of the
screws B will have to be extended to the outside so as to fix the bottom 2 against
the rim and the plate B' against a similar rim inside for the bottom part and to
fix the bottom Z to the plate B' by means of stay pieces for the top part.
The casing Z is shown in pedestal form as arranged for standing. With suitable
alterations it may be arranged for fixing against a wall or a ceiling or otherwise.
The cover may also be arranged for being locked in some manner. When it

page_text: appears convenient the cover Z may be provided with suitable openings for ventilation
and to allow any steam to escape.
Having now particularly described and
invention and in what manner the same is
I claim is :-
ascertained the nature of my said
to be performed I declare that what
1. In a horse power gauge the combination with a movable crosshead D² driven by
the slot link rod W4, and a helical spring D attached to the crosshead D2, of a long
piston rod C having a collar D' fixed to the spring D and arranged to slide in the
cylinder B and in the bearing C and having a piston A and a head ("acting upon the
levers E and E substantially as set forth.
2. In a horse power gange the combination with lever E and E influenced by
the side spring F and having pieces E and E³, with rods G and G and with a shaft H²,
of a main lever having two arms H and H' substantially as set forth.
3. In a horse power gauge the combination with the main lever arms H and H¹ and
the shaft H2, of a main lever arm H³ having a sleeve H4, with an equalizing rod I
having two adjustable pieces I¹ and [2, with a lever K, a segment K', a counter-
weight K2, a brake L, a spring L', a lever I and a shaft K actuating the levers K'
and K for the purpose of transmitting the amount of the mean actual pressure of the
steam to the pointer Q substantially as described and shown.
4. In a horse power gange the combination with a movable rod Q, an adjustable
rod S³, a lever S2, its shaft Si, a lever Q', its shaft Q and a lever Q3 having a toothed
segment or their equivalents, with a pinion Q, its shaft Q, a spring Q and a pointer Q
of a curved lever K having a sliding piece K7 the said parts being arranged
substantially as set forth or in an equivalent manner for the purposes specified.
5. In a horse power gauge the combination with the lever S³, of a lever S having
an adjusting piece R² a rod R' and a lover R moved by the lever T through its shaft T
substantially as and for the purpose set forth.
6. In a horse power gauge the combination with the lever S², of a rod S4, a lever S³,
its shaft S and a lever S outside the casing substantially as and for the purpose
set forth.
7. In a horse power gauge the combination with a lever K, rods M, a nut M', a
screw spindle M² having a clutch coupling M³, three wheels M M and M' constantly
driven from the pulley M outside the casing, and its shaft M8, of the wheels M*, N', N
and O', the shafts N and O, the bevel wheels 02 and P and a screw spindle P¹ having
a nut P2 for the purpose of varying the slot link rod W in the slot link W² substan-
tially as shown and described.
8. In a horse power gauge the combination with the lever T5, of a lever T outside
the casing, its shaft T2, a lever T3 and a rod T for the purpose of varying the slot link
rod V2 in the slot link V substantially as shown and described.
Dated this 20th day of October 1890.
H. B. BARLOW,
17, St. Ann's Square, Manchester, Agent for Applicant.