Improvements in Apparatus for Indicating or Registering the Power Exerted by Steam or other Motive Power Engines.
Year: 1897

page_text: Complete Specification Left, 17th Aug., 1898-Accepted, 17th Sept.,
1898
Improvements in Apparatus for Indicating or Registering the Power
Exerted by Steam or other Motive Power Engines.
We, WILLIAM GODSON LITTLE, of Blendon Grove, Bexley, in the County of
Kent, Engineer, and CHARLES WILLLAM GODSON LITTLE, of Heckington, in the
County of Lincoln, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to apparatus forming the subject matter of Letters Patent
No. 17576 granted to us and dated the 15th September 1894, and has for its object
to improve the construction and operation of such apparatus.
According to this invention the forward bearing of the oscillating shaft (in
which is mounted, or to which is pivotally connected the frictionally-rotated
integrating wheel) is situated as close to the drum as possible so as to reduce
jarring or vibration to a minimum; this is effected by dishing the integrating
wheel and providing the bearing within the hollow therein, the shaft being bent
or cranked wliere necessary to clear the wheel.
The oscillating shaft is mounted in a carriage fitting upon the upper end of
the pressure cylinder the cover of which serves to retain the carriage on the said
cylinder. The carriage is secured to the bracket by a screw, a tapered part of
which engages with the bracket so as to ensure that the axis of the oscillating
shaft shall be at right angles to, and in a line cutting, the axis of the drum.
When this screw is removed the carriage together with the integrating wheel
and the counter carried thereby may be turned on the pressure cylinder away
from or out of line with the drum.
The spindle of the integrating wheel is supported between two adjustable
centres of which, one is mounted in an arm projecting from the oscillating
shaft, and the other is mounted in a V shaped frame secured to the said oscillating
shaft, the arius of this frame being preferably of Lor equivalent section so as to
combine lightness with rigidity. This frame serves also to support the two
indicating wheels.
The rearward end of the oscillating shaft is acted upon by a blade spring which
presses the integrating wheel towards the drum, and the shaft may be moved
back against the pressure of this spring by means of a pivotted cam or wedge
shaped segment.
The crank and crank pin by which motion is transmitted from the piston to
the shaft may be so connected that the angle of the crank, in relation to the axis
of the integrating wheel and the position of the crank pin on the crank can be
adjusted to provide for any desired angular throw being imparted to the wheel
for a given pressure. For this purpose the crank is formed with a boss adjustablo
in a rotary direction on the shaft and the crank pin is formed with a boss adjust-
able longitudinally on the crank; the several parts being soldered or otherwise
secured together when their proper relative positions have been determined.

page_text: The slotted head which engages with the crank pin is secured to the piston rod
by a split sleeve and screw so that by loosening the screw the said sleeve may be
readily detached to enable the cylinder cover to be unscrewed and the piston,
piston-rod and spring removed from the cylinder.
The shaft of the drum is coned at its lower end to fit into a coned adjustable
bearing in the bracket, and at its upper end it is provided with a cup for receiving
a centre bearing which is adjustable in a bridge which extends over the drum
and is clamped to the bracket by a split sleeve and screw. The two drum bearings
are provided with lock nuts for securing them in position and they, and the drum
shaft, are axially perforated so as to contain a supply of lubricant for lubricating
the bearings during the working of the apparatus The lower bearing is pro-
vided with a screw by removing which the lubricant can be run out.
•
The hole for the knotted cord is cut, through to the edge of the drum end so that
the cord can be readily inserted and removed.
The drum is provided at its lower part with a projection which comes in contact
with a screw stop, which can be inserted into ither side of the bridge. At its
upper part, the drum is provided with a projection which actuates two rings each
having on the lower side a tooth so that when the drum is reciprocated by the
engine the two rings (one of which is graduated and the other provided with a
vernior) and set apart by the projection on the drum an amount corresponding
to the stroke of the drum.
The drum is provided with a sleeve to constitute a bearing surface for the
integrating wheel. This sleeve can he raised or lowered to any desired position
on the drum to change the point of contact with the wheel and is prevented from
turning on the drum by a groove and feather.
It is preferred to construct the apparatus so that when it is in its normal or
starting position the plane of the integrating wheel is at an angle to, or inter-
secte the plane containing, the axes of the drum as then the apparatus will serve
for indicating vacuum as well as pressure.
Dated this 9th day of December 1897.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.
Improvements in Apparatus for Indicating or Registering the Power
Exerted by Steam or other Motive Power Engines.
We, WILLIAM GODSON LITTLE, of Blendon Grove, Bexley, in the County of
Kent, Engineer, and CILARLES WILLIAM GODSON LITTLE, of Heckington, in the
County of Lincoln, 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 relates to apparatus forming the subject matter of Letters Patent
No. 17575 granted to us and dated the 15th September 1894 and has for its object
to improve the construction, and operation of such apparatus.
We will describe the invention by reference to the accompanying drawings,
in which,
Figure 1 is a side elevation, partly broken away, of one of our improved
indicators.
Figures 2 and 3 are respectively, an elevation of the left hand end, and a plan,
of Figure 1,
Figure 4 is a longitudinal vertical section of a portion of the indicator, and

page_text: Figuro 6 is an inverted horizontal section on the line 5-5 of Figure 1.
Like letters of reference indicate like parts throughout the drawings.
According to this invention, as shown in Figures 1 and 3, the forward bearing A.
of the oscillating shaft B (in which is mounted or to which is pivotally conncoted
the frictionally-rotated integrating wheel C) is situated as close to the drum D
as possible so as to reduce jarring or vibration to a minimum; this is effected by
dishing the integrating wheel C and providing the bearing A within the hollow
therein, the shaft B being bent or cranked at B3 to clear the wheel.
The oscillating shaft B is mounted in a carriage E fitting upon the upper end
of the pressure cylinder F the cover of which serves to retain the carriage on
the said cylinder. The carriage is secured to the bracket G by a screw G³ a
tapered part g of which engages with the bracket so as to ensure that the axis
of the oscillating shaft B shall be at right angles to, and in a line cutting, the
axis of the drum D. When the screw G is removed, the carriage E logether
with the integrating wheel C and the counter H carried thereby, may be turned
on the pressure cylinder F, away from, or cut of line with, the drum D.
The spindle c of the integrating wheel C is supported between two adjustable
centres of which, the centre is mounted in an arm projecting from the
oscillating shaft B and the centre is mounted in a V shaped frame 6 secured
to the said oscillating shaft, the arms of this frame being preferably of Lor
equivalent section so as to combine lightness with rigidity. This frame serves
also to support the counter H.
The rearward end of the oscillating shaft B is acted upon by a blade spring
which presses the integrating wheel towards the drum D and the shaft may be
moved back against the pressure of this spring by means of a pivotted cam or
wedge shaped segment K.
The crank L and crank pin by which motion is transmitted to the shaft B
from the piston working within the cylinder F, may be so connected that the
angle of the crank, in relation to the axis of the integrating wheel C, and the
position of the crank pin 7 on the crank L can be adjusted to provide for any
desired angular throw being imparted to the wheel for a given pressure. For this
purpose the crank L is formed with a boss 1 adjustable in a rotary direction on
the shaft B and the crank pin is formed with a boss / adjustable longitudinally
on the crank, the several parts being soldered or otherwise secured together when
their proper relative positions have been determined.
The slotted head M which engages with the crank pin is secured to tho
piston rod N by a split sleeve m and screw m³ so that by loosoning the screw
the said sleeve may bo readily detached to enable the cylinder cover f to be
unscrewed, and the piston, piston-rod and spring removed from the cylinder F.
The shaft D of the drum D, as shown in Figure 4, is coned at its lower end to
fit into a coned adjustable bearing in the bracket G, and at its upper end it is
provided with a cup for receiving a centre bearing which is adjustable in a
bridge O which extends over the drum D and is clamped to the bracket G by a
split sleeve and screw o³. The two drum bearings and o are provided with
lock nuts g³ and of respectively, for securing them in position and they, and the
drum shaft D' are axially perforated as at p so as to contain a supply of lubricant
for lubricating the bearings during the working of the apparatus. The bearing
is provided with a screw 9' by removing which the lubricant can be run out.
The holed for the knotted cord as shewn in Figures 1 and 2 is cut through
to the edge of the drum end so that the cord can be readily inserted and removed.
The drum D is provided at its lower part with a projection d Figures 2 and 4,
which comes in contact with a screw stop 02, which can be inserted into either
side of the bridge 0. At its upper part, the drum D is provided with
projec
tion which actuates two rings QQ each having on the lower side a tooth 99*
respectively, so that when the drum is reciprocated by the engine the two rings
(of which the ring Q is graduated and the ring Q is provided with a vernier q³)

page_text: are set apart by the projection d³ on the druni, an amount corresponding to the
stroke of the drum.
The drum D is provided with a sleeve D³ to constitute a bearing surface for
the integrating wheel C. This sleeve can be raised or lowered to any desired
position on the drum to change the point of contact with the wheel, and is
provented from turning on the drum by a groove and feather & Figure 1.
It is preferred as shown in the drawings to construct the apparatus so that when
it is in its normal or starting position the plane of the integrating wheel C is at
an angle to, or intersects the planc containing, the axis of the drum, as then the
apparatus will serve for indicating vacuum, as well as pressure.
Having now particularly described and ascertained the nature of the said in-
vention and in what manner the same is to be performed, we declare that what
we claim is:-
1. In apparatus such as described the combination with a dished integrating
wheel, of a cranked shaft such as B B substantially as hereinbefore described with
reference to the accompanying drawings.
2. In apparatus such as described the combination with an integrating wheel
and counter, of a carriage for supporting them, pivotted coaxially with the cylinder
substantially as hereinbefore described with reference to the accompanying
drawings.
3. In apparatus such as described the construction and arrangement of crank
and crank pin substantially as hereinbefore described with reference to the accom-
panying drawings.
4. In apparatus such as described the combination with a slotted head such as M,
of a split sleeve such as m substantially as hereinbefore described and illustrated
in the accompanying drawings.
5. In apparatus such as described the combination with an axially-perforated
drum shaft, of axially perforated bearings such as 9 o substantially as and for
the purpose herein before described with reference to the accompanying drawings.
6. In apparatus such as described a drum having a hole or recess (d) cut through
or extending to its edge substantially as and for the purpose hereinbefore described
with reference to the accompanying drawings.
7. In apparatus such as described the combination with a drum having a pro-
jection such as d³, of two rings such as QQ capable of being turned by the
projection in relatively opposite directious substantially as hereinbefore described
with reference to the accompanying drawings.
8. In apparatus such as described the combination with the drum D and an
integrating wheel, of a sleeve such as D³ longitudinally adjustable on the drum,
substantially as heroinbefore described with reference to the accompanying
drawinga.
9. The combination and arrangement of parts constituting the apparatus for
indicating or registering the power exerted by steam or other motive power engines
substantially as hereinbefore described and illustrated in the accompanying
drawings.
Dated this 17th day of August 1800
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.O., Agents.