Improvements in Apparatus applicable for use in Indicating or Registering Motive Power.
Year: 1892

page_text: Date of Application, 8th Apr., 1892
Complete Specification Left, 9th Jan., 1893-Accepted, 11th Feb., 1893
Improvements in Apparatus applicable for use in Indicating or
Registering Motive Power.
We, JOSEPH ARMYTAGE WADE, Timber Merchant, of Hornsea, in the East
Riding of the County of York, and JOHN CHERRY, Mechanical Engineer, of
Hornsea aforesaid, do hereby declare the nature of this invention to be as
follows:-
This invention consists of improvements in apparatus of the kind described in
the Specification filed in pursuance of our application for Letters Patent No. 9080,
A.D. 1891 its objects being to enable the amount of motive power indicated or
registered by the differential movement of the fly wheel, driving rigger or gear
wheel (hereinafter referred to as "the wheel") and the driving or driven shaft
(hereinafter referred to as "the shaft ") to be more easily read.
In carrying out our invention, we mount on the shaft near the wheel a bipart
collar; V-shaped teeth being formed on the end of each part of the collar. The
part next the wheel is capable of rotating on the shaft, but is connected to the
wheel, so that it can only rotate on the shaft with the wheel; that is, when there
is a differential movement between the shaft and the wheel. The other part is
connected to the shaft by a feather working in a feather-way, and can slide
longitudinally on and rotate with the shaft, but cannot rotate on the shaft
independently. Between the outer end of the sliding part of the collar and a stop
on the shaft there is a spiral spring, which keeps the V-shaped teeth on the
sliding part in engagement with the V-shaped teeth on the part connected to the
wheel. The stop may be in the form of a cylinder entirely enclosing the spring ;
the sliding part moving to and fro within the cylinder. On each part of the
collar there is a flange; these flanges forming rails on which run the wheels
or rollers of the indicating or registering device. This comprises a movable
dial and pointer mounted in a suitable casing. The dial can be set by rotating
a thumb-button provided for the purpose. The casing is furnished on the under
side with two double-flanged wheels or rollers which run on the rail pertaining to
the inner part of the collar. The pointer is actuated by a rack, which engages with
a pinion on the spindle of the pointer. This rack is preferably in the form of a
slide containing a slot, from one edge of which the rack-teeth project. This rack-
slide works in a guiding hole in the casing; its outer end being furnished with two
double-flanged wheels or rollers which run on the rail pertaining to the sliding part
of the collar. The dial is kept horizontal during the rotation of the shaft by
means of a weight attached to the casing and hanging below the shaft.
The action is as follows:-When the wheel overruns the shaft, or vice versa,
the inner part of the collar, which is connected to the wheel, moves circumferentially
on the shaft, its V-shaped teeth pressing on the V-shaped teeth of the sliding part
of the collar and causing that part to slide, against the action of its spring, into the
enclosing cylinder. The rail on the sliding part, bearing against the outer flanges
of the wheels on the rack-slide, moves the wheels and consequently the rack-slide ;
the casing being, however, prevented from moving because the flanges of its wheels
engage with the rail on that part of the collar which does not slide. The sliding
movement of the outer part of the collar thus actuates the rack-slide and turns the
pointer; thereby indicating or registering the amount of the differential movement
which has taken place between the wheel and the shaft. When the wheel and the
shaft recover their normal relative positions, the spring in the cylinder forces the
sliding part of the collar back into its normal relative position; the pointer being
at the same time moved back. The dial can be turned by the thumb-button so as
to bring the zero or other mark exactly under the pointer whenever required.

page_text: If preferred, the pointer may be worked by cranks instead of by the rack-slide
and pinion.
Dated the 5th day of April 1892.
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Chartered Patent Agent.
COMPLETE SPECIFICATION.
Improvements in Apparatus applicable for use in Indicating or
Registering Motive Power.
We, JOSEPH ARMYTAGE WADE, Timber Merchant, of Hornsea, in the East
Riding of the County of York, and JOHN CHERRY, Mechanical Engineer, of
Hornsea aforesaid, 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 of improvements in apparatus of the kind described in
the Specification to our Letters Patent No. 9080, A.D. 1891; its objects being to
enable the amount of motive power indicated or registered by the differential
movement of the fly wheel, driving rigger or gear wheel (hereinafter referred to as
"the wheel") and the driving or driven shaft (hereinafter referred to as "the
shaft") to be more easily read.
In the accompanying drawings,
Fig. 1 is a view, partly in side elevation and partly in section, showing a driving
rigger and shaft fitted with our invention.
Fig. 2 is a cross section on the line 2, 2 (Fig. 1).
Fig. 3 is an enlarged view, partly in side elevation and partly in section, of the
indicating device;
Fig. 4 being a corresponding plan.
Fig. 5 is a section on the line 5, 5, and Fig. 6 a section on the line 6, 6, in
Fig. 3.
Fig. 7 is a plan of the under side of the casing containing the dial.
Fig. 8 is a cross section illustrating a modified form of construction.
Fig. 9 is a plan of a further modification.
The
A and A' are the two parts of the boss of the wheel. B is the wheel and C the
shaft. On the shaft near the wheel is a bipart collar G G¹; V-shaped teeth being
formed on the end of each part of the collar. The part G is capable of rotating on
the shaft C, but is connected to the wheel by the lever g and pin gl, so that it can only
rotate on the shaft with the wheel; that is, when there is a differential movement
between the shaft and the wheel. The other part G' is connected to the shaft C
by a feather working in a feather-way, and can slide longitudinally on and rotate
with the shaft, but cannot rotate on the shaft independently. Between the outer end
of the sliding part G' and a stop on the shaft there is a spiral spring (represented
in dotted lines in Fig. 3), which keeps the V-shaped teeth on the sliding part G¹ in
engagement with the V-shaped teeth on the part G connected to the wheel.
stop may be in the form of a cylinder H entirely enclosing the spring; the sliding
part G¹ moving to and fro within the cylinder. On each part of the collar there
is a flange g³ or g²; these flanges forming rails on which run the wheels k or k¹ of
the indicating or registering device. This comprises a movable dial K and
pointer K mounted in a suitable casing K³. The dal can be set by rotating a
thumb-button ** provided for the purpose. The casing K is furnished on the
under side with two double-flanged wheels which run on the rail g² pertaining to
the part G of the collar. The pointer K' is actuated by a rack K*, which engages
with a pinion on the spindle k₁ of the pointer. This rack is preferably in the
form of a slide, as shown, containing a slot, from one edge of which the rack-teeth
project. This rack-slide works between guides k' and k on the casing; its outer

page_text: end being furnished with two double-flanged wheels k' which run on the rail g
pertaining to the sliding part G₁ of the collar. The dial K is kept horizontal
during the rotation of the shaft by means of a weight K' attached to the casing K'
and hanging below the shaft C.
The action is as follows:-When the wheel B overruns the shaft C, or vice versû,
the inner part G of the collar, being connected to the wheel, moves circumferentially
on the shaft, its V-shaped teeth pressing on the V-shaped teeth of the sliding
part G' of the collar and causing that part to slide, against the action of its spring,
into the enclosing cylinder H. The rail g' on the sliding part G', bearing against
the outer flanges of the wheels on the rack-slide K*, moves the wheels and
consequently the rack-slide; the casing K' being, however, prevented from moving
because the flanges of its wheels k engage with the rail on that part of the collar
which does not slide. The sliding movement of the part G' thus actuates the rack-
slide K* and turns the pointer K; thereby indicating or registering the amount of
the differential movement which has taken place between the wheel and the shaft.
While the wheel and the shaft are recovering their normal relative positions, the
spring in the cylinder H is forcing the sliding part G¹ of the collar back into its
normal relative position; the pointer K' being at the same time moved back.
The
dial K can be turned by the thumb-button k² so as to bring the zero or other mark
exactly under the pointer whenever required.
If preferred, the pointer may be worked by cranks instead of by the rack-slide
and pinion.
In the modification shewn in Fig. 8, the boss A³ is in one piece, and has a lateral
tubular extension A for supporting the part G' and the stop H. The wheel B is
provided on one side with an inwardly-projecting flange B', and on the other side
with a corresponding cover B'. The flange B' and cover B are bolted together,
and work upon the boss A'. They also serve to enclose the springs which are
placed between chocks connected to the wheel and to the boss respectively, as
described in the Specification previously referred to. E and E' are the two chocks
moving with the wheel. The part G¹, instead of being operated by the part G
connected by a lever g with the wheel, is acted upon by an annular projection G* on
the cover B; the part G* corresponding with the part G and performing similar
functions. The part G¹ is forced up to the part Gx by springs arranged outside
the stop H, though a spring similar to that shown in dotted lines in Fig. 3 may be
employed, if preferred.
In Fig. 9, the pointer K is pivoted to a support K³, whence it extends beyond
the part G¹ to the scale or divided sector K. The rails g' and 9' are dispensed
with; collars and k³ being substituted. Projections on the pointer K' engage
between the collars; or trunnions on a ring between the collars engage with the
pointer. Thus the sliding movement of the part G₁ is communicated to the
pointer K*; the extent of movement being indicated by the scale K. The pointer K*
may be prolonged beyond its pivot, and a spring connected to the prolongation;
this spring causing the pointer K to return to its normal position. The collar k³
could then be omitted.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, we claim :-
1. The improved means for indicating or registering differential movement
between a fly-wheel, driving rigger or gear-wheel and its boss, substantially as
described with reference to the accompanying drawings.
2. In apparatus applicable for use in indicating or registering motive power, the
employment of a sliding part, such as G', mounted on and turning with the shaft,
differential movement of the fly-wheel, driving rigger or gear-wheel causing the
said part to slide and actuate indicating or registering mechanism, substantially as
herein described.
3. The combination, with a wheel B rotatively mounted on a boss on the shaft,
of a part G turning on the shaft, a part G¹ sliding on and turning with the shaft, a

page_text: spring for forcing the part G¹ up to the part G, and a connection g, substantially as
and for the purposes herein set forth.
4. The combination, with a wheel B rotatively mounted on a boss on the shaft, of
a part G turning on the shaft, a part G sliding on and turning with the shaft, and
a connection 9, of a device for indicating or registering the differential movement
between the wheel and its boss, substantially as and for the purposes herein set
forth.
5. The combination, with a wheel B rotatively mounted on a boss on the shaft,
of a bipart collar G G¹, a lever g, rails 93 and 93, a stop H, a spring between the
stop and the part G¹ of the collar, a dial K, a pointer K', a casing K², wheels k, a
rack K, wheels A', and a pinion on the spindle * of the pointer, substantially as
and for the purposes herein set forth.
6. The combination, with a wheel B rotatively mounted on a boss on the shaft,
and a tubular part G* projecting from the wheel and furnished with V-shaped
teeth, of a sliding part G₁ also furnished with V-shaped teeth and rotating with the
shaft, the part G₁ being forced up to the part G* by a spring or springs, the part G*
actuating the part G', substantially as and for the purposes herein set forth.
Dated the 9th day of January 1893.
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Chartered Patent Agent.