Used in Carding Engines.
Year: 1888

page_text: This Specification was, upon the 31st day of July 1889, Amended under
Sections 18 to 21 of the Patents, Designs, and Trade Marks Act, 1883.
Date of Application, 15th Feb., 1888
Complete Specification Left, 15th Nov., 1888-Accepted, 31st Dec., 1888
Used in Carding Engines.
WO JAMES EDWARD PLATT of Hartford Works, Oldham in the county of Lancaster,
Engineer and JAMES FIDLER of the same place Machinist, do hereby declare the
nature-of this invention to be as follows:
:-
Our invention relates to machinery or apparatus for grinding the "flats" used in
carding engines and consists in improvements by means of which we are enabled to
grind "flats" readily and accurately.
23
"
or
We support the "flat" or "flats" to be ground upon bridge fixings or brackets
situate at opposite sides of the machine, each "flat" being supported upon the bridge
fixings or brackets by the portions of such "flat" which rest upon the "bend
"flexible bend" of the carding-engine when the said "flat" is in use. We so form
the portions of the bridge fixings or brackets upon which the "flats rest while
being ground, that the surface of the "wire" or teeth of each "flat" being ground
shall be in the same plane as the surface of the "wire" or teeth of the other flats
being ground. Beneath the "flat" or "flats to be ground we place a grinding
roller rotated by any convenient means such roller being mounted in brackets, or in a
frame capable of being slidden backwards and forwards upon suitable guides. We
traverse the grinding roller backwards and forwards at an uniform or nearly uniform
speed beneath each of the "flats" to be ground and for this purpose we employ a
pair of elliptical wheels which receive rotary motion in any convenient manner and
which by means of a stud and connecting rod cause the brackets or frame carrying
the grinding roller above-mentioned to be traversed backwards and forwards at an
uniform or nearly uniform speed beneath the "flats" to be ground or instead of
elliptical wheels we employ any other suitable arrangements by means of which the
grinding roller may be caused to move backwards and forwards at an uniform or nearly
uniform speed.
As the wire or teeth upon the "flats" being ground becomes or become shorter
we cause the grinding roller to be advanced towards the "flats" for which purpose
we employ a pawl which pawl is jointed to a fixed part of the machine.

page_text: The said pawl at times acts upon a ratchet wheel mounted upon a shaft provided
with a cam or cams the said shaft being carried by or connected to the brackets or
frame which carry or carries the grinding roller. The traversing backwards and
forwards of the grinding roller will cause the pawl to act upon the ratchet wheel and
thereby rotate the car or cams before mentioned such cam or cams moving the
grinding roller nearer to the "wiro" or teeth of the "flats" being ground.
"
22
We form a portion of the circumference of the ratchet wheel aforesaid without
teeth so that when the grinding roller has operated upon the "wire". or teeth of the
"flats" to the desired extent the portion of the ratchet wheel upon which there are no
teeth will arrive beneath the pawl and no further rotation of the cam or cams wil!
take place and the grinding roller will cease to grind the "flats." When the first
"flat" or the first "flats of a set have been ground to the desired extent we so
adjust the ratchet wheel that the pawl falls into the last tooth next to the blank portion
of the ratchet wheel or the portion of the ratchet wheel upon which there are no teeth.
When another "flat or other flats" of the set above mentioned is or are to be
ground the ratchet wheel above referred to is turned in a direction opposite to that
in which it was turned by the pawl aforesaid.
The "flat" or
"Hats
to be ground is or are then placed upon the bridge fixings
or brackets previously mentioned to which they are secured by clips or in any other.
suitable manner.
The grinding roller is then caused to traverse backwards and
forwards beneath the "flat" or
to be ground.
flats
>>
The pawl previously referred to will cause the ratchet wheel to be rotated until the
blank portion or portion without teeth arrives beneath the pawl and thus the "wire
or teeth of the "flat" or "flats" will be ground to the same length as the wire or
teeth of that or those last operated upon. The grinding roller employed may be
sufficiently long to extend over the entire length of the surface of the "wiro" or
teeth of the "Hat or "flats" to be operated upon in which case a short longitudinal
traverse"may be imparted to the grinding roller in any convenient manner or we
may use a grinding roller of the kind known as "Horsfalls grinder."
33
Dated this Fourteenth day of February 1888
W. T. CHEETHAM,
Carlton Chambers,
18, St. Ann's Street, Manchester,
Agent to the Applicants:

page_text: COMPLETE SPECIFICATION (AMENDED).
Improvements in Machinery or Apparatus for Grinding the "Flats'
Used in Carding-engines.
"
We JAMES EDWARD PLATT of Hartford Works, Oldham, in the County of
Lancaster Engineer and JAMES FIDLER of the same place Machinist 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 :-
Our Invention relates to machinery or apparatus for grinding the "flats" used in
carding-engines and consists in improvements by means of which we are enabled to
grind flats" readily and accurately.
وو
We support the " flat" or "flats" to be ground upon bridge fixings or brackets
situate at opposite sides of the machine each "flat" being supported upon the bridge
fixings or brackets by the portions of such "flat" which rest upon the "bend" or
We so form
"flexible bend" of the carding-engine when the said "flat" is in use.
the portions of the bridge fixings or brackets upon which the "flats" rest while
being ground that the surface of the "wire" or teeth of each "flat" being ground
shall be in the same plane as the surface of the "wire or teeth of the other "flats "
.being ground. Beneath the "flat" or "flats" to be ground we place a grinding
roller rotated by any convenient means such roller being mounted in brackets or in a
frame capable of being slidden backwards and forwards upon suitable guides. We
traverse the grinding roller backwards and forwards at an uniform or nearly uniform
speed beneath each of the "flats" to be ground and for this purpose we employ a
pair of elliptical wheels which receive rotary notion in any convenient manner and
which by means of a stud and connecting rod cause the brackets or frame carrying
the grinding roller above mentioned to be traversed backwards and forwards at an
uniform or nearly uniform speed beneath the "flats" to be ground or instead of
elliptical wheels we employ any other suitable arrangements by means of which the
grinding roller may be caused to move backwards and forwards at an uniform or
nearly uniform speed.
The accompanying drawings illustrate our invention. Fig. 1 is an end elevation
and Fig. 2 is a front -view of that which is shown in Fig. 1. The same letters of
reference are applied to corresponding parts in both of the figures. a. a are side
framings connected together by the cross frame b. As the parts situate at opposite
sides of the machine are similar we shall affix to corresponding parts the same letters
of reference. Formed in each of the side framings a. a are guides c in which and
capable of being slidden longitudinally therein is a slide or frame d. Upon each of
the slides or frames d are formed slides e, e in which and capable of being slidden
therein is a bracket f supported in which and capable of being rotated therein is one
end of the axle g¹ of the grinding roller g.
In the lower end of each of the brackets f is formed a bearing in which is
supported so as to be capable of being rotated therein one end of a shaft h. · Upon

page_text: the shaft are formed or mounted cams j, j one at each end of the shaft h. Screwing
into each of the brackets f is a set screw f1, the end f³ of which rests upon one of
the cams, j. Carried by one of the slides or frames d and capable of being slidden
longitudinally thereon is a bar k upon which are formed toothed racks ¹, the teeth
of the rack k taking into or engaging with the teeth of a wheel 1 fast upon the
shaft and the teeth of the rack taking into or engaging with the teeth of a
wheel m mounted upon a stud m¹ secured to the slide or frame d. Fast with the
wheel m is a disc m² to which is secured by bolts m³ and nuts a disc or plate n in
portions of the circumference of which are formed ratchet teeth n¹.
The disc or plate n will hereinafter be sometimes called the ratchet wheel n-The
heads of the bolts m³ pass into a circular groove fornied in the disc m². Supported
by and capable of being rotated in bearings a¹ is a shaft o mounted upon one end of
which are the "fast" and "loose" pulleys o¹, o'. Fast upon the shaft o is a pulley o³ which
by means of an endless belt communicates rotary motion to a pulley g' fast upon the
axle g of the grinding roller g. To avoid confusion the pulleys o³, o*, o³ and g² are
not shown in Fig. 1 of the accompanying drawings.
Fast upon the shaft o is a worm of the screw threads of which gear into or engage
with the teeth of a wheel p fast upon a short shaft p¹ carried by and capable of being
rotated in a bracket a³ secured to one of the side framings a. a. Fast upon the
shaft p is a worm p² the screw-threads of which gear into or engage with the teeth
of a wheel q fast upon a tubular collar 9 capable of being rotated upon a stud
Fast upon the tubular collar q¹ is an elliptical wheels which gears into an elliptical
wheelfast upon a short shaft t¹ supported by and capable of being rotated in a
boss a formed upon one of the side framings a. Secured in a slot formed in a
part 3 fast with the elliptical wheel t is a crank pin t* embraced by a connecting rod u
the other end of which embraces a pin ¹ projecting from an arm v fast upon a shaft w
supported by and capable of turning in bearings as formed in the side framings a.
Fast upon the shaft to are arms a each of which is formed with a jaw a which
embraces a step ² mounted upon a stud d¹ projecting from and secured to the slide
or frame d-Secured to the part a of each of the side framings a, which part a
forms a bridge bracket or fixing is a bracket y. Each of the brackets y is provided
with studs y. Each of the studs y' is provided with a clip y' in which is formed a
hole through which the said stud y extends. Each of the stuis y' is formed with
screw threads upon which and capable of being screwed thereon is a nut y³. Upon
each of the brackets y we form facings. The ends 1" of the "flat" 1 to be ground
are supported upon the facings the portions of the "flat" 1 which rest upon the
facings z being those which rest upon the "bend" or "flexible bend" of the carding-
engine when the said "flat" 1 is in use.
The machine illustrated in the accompanying drawings is arranged for grinding
two flats" simultaneously.
"
The "flats" to be ground are secured by the clips y and nuts y³ upon the facings.
The shaft o being caused to rotate by means of the pulley o¹ rotary motion will be
communicated to the grinding roller g. The rotation of the shaft o will by means
of the worm 0, wheel p, worm p², wheel 7 and elliptical wheels s and t cause the
crank pin to revolve. The revolution of the crank pin t will by means of the
connecting rod u, arın v, shaft w, arms a, jaws ¹, steps a² and pins d'cause the slides
or frames d to be traversed to and fro longitudinally and thereby cause the grinding
roller to be traversed beneath the "flats" 1 which are to be ground. The ellip-
tical wheels's and t will cause the grinding roller to be traversed backwards and
forwards at an uniform or nearly uniform speed. When the slides or frames d are
being moved in the direction indicated by the arrow A the teeth n¹ of the ratchet
wheel n will arrive against the pawl 2 mounted upon the stud 3 secured to one of the
side frames a, the pawl 2 being at liberty to be turned in the direction indicated by
the arrow B but prevented from descending below the position in which it is shown,
by a pin or by any other convenient means. The to and fro motion of the slides or
frames d will cause the teeth n¹ of the ratchet wheel n to be acted upon by the pawl 2
so as to cause the said ratchet wheel n to be turned and by means of the wheel m

page_text: 2
22
rack, rack and wheel cause the shaft h to be turned and thereby cause the
cams to raise the brackets so as to cause the grinding roller g to be moved
nearer to the wire or teeth of the "flats" 1 being ground. Each movement of the
slides or frames d in the direction indicated by the arrow A will cause the pawl 2 to
turn the ratchet wheel n in the direction indicated by the arrow C, thereby causing
the grinding roller g to act upon the "wire" or teeth of the "flats 1. We form a
portion of the circumference of the ratchet wheel n aforesaid without teeth so that
when the grinding roller has operated upon the "wire" or teeth of the "flats" 1
to the desired extent, the portion 2 of the ratchet wheel upon which there are no
teeth will arrive beneath the pawl 2 and no further rotation of the cams j. i will take
place and the grinding roller g will cease to be raised towards the "flats" 1. When
the first "flat' or the first flats" of
શ set have been ground to the desired extent
the ratchet wheel n is so adjusted by means of the bolts m³ and nuts that the pawl 2
falls into the last tooth next to the blank portion of the ratchet wheel n
or portion of the ratchet wheel n upon which there are no teeth whereupon
the further movements of the slides or frames d in the direction indicated
by the arrow A will take place without causing any further raising of the
grinding roller g. When another "flat" or other "Hats" of the "set" abovo
mentioned is or are to be ground the ratchet wheel n above referred to is turned in a
direction opposite to that indicated by the arrow C so that the cams j.j will be turned
into the position in which they are shown in the drawings, so that the grinding
roller will be allowed to descend clear of the "wire" or teeth of the flats 1 and
the pawl 2 is turned back so that it will not act upon the ratchet wheel n. The
nuts y are then turned so as to liberate the clips y' and the flats 1 are removed. Two
more "flats" of the "set" to be ground are then secured upon the facings z by
means of the nuts y³ and clips y previously described. The pawl 2 is then turned so
as to act upon the ratchet wheel n and so as to cause the grinding roller
raised and grind the "wire or teeth of the "flats." The pawl 2 will again cause
the ratchet wheel n to be turned until the blank portion n² of the ratchet wheel n
or the portion 2 of the ratchet wheel n which is without teeth arrives beneath the
pawl 2 and thus the "wire" or teeth of tho "flat" or "flats" will be ground to the
same length as the " wire or teeth of that or those last operated upon.
"
"
to be
The grinding roller employed may be sufficiently long to extend over the entire
length of the surface of the "wire or teeth of the "flat or "flats" to be operated
upon in which case a short longitudinal "traverse" may be imparted to the grinding
roller in any convenient manner or we may use a grinding roller of the kind known
"Horsfalls grinder."
as
The machines constructed according to our invention may be made to hold one
"flat" or two or more "flats" while the "wire" or teeth of such "flat" or
is or are being ground.
"flats"
By means of the screws f¹ the grinding roller 7 may be adjusted relatively to the
facings z on the brackety.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be nerformed
we declare that what we

page_text: 2. To enable the grinding roller to be traversed backwards and forwards beneath
the "flat" or "flats" the wire or teeth of which is or are to be ground the slides or
frames d and brackets fall constructed, arranged, employed and operating sub-
stantially as herein before described in reference to and indicated in and by the
accompanying drawings.
* flats
32
<
or
3. To traverse the grinding roller backwards and forwards beneath the "flat"
at an uniform or nearly uniform speed while the said grinding roller is
grinding the "wire" or teeth of the "flat" or flats," the elliptical wheels s and t,
crank pin connecting rod u, pin el, arm, shaft w, arms, steps, and studs d'
all constructed, arranged, employed and operating substantially as and for the
purposes herein before described in reference to and indicated in and by
accompanying drawings.
"
the
4. For raising the grinding roller towards the "flat" or "flats"the" wire ог
teeth of which is or are to be ground the pawl 2, the ratchet wheel a provided with
teeth n and a blank portion n² or a portion without teeth, the wheel m, the rack ²,
the rack ¹, the wheel 1, the cams j. j and brackets fall constructed, arranged,
employed and operating substantially as and for the purposes hereinbefore described
in reference to and indicated in and by the accompanying drawings.
Dated this Fourteenth day of November 1888.
W. T. CHEETHAM, ·
Manchester,
Agent to the Applicants.

page_text: Date of Application, 15th Feb., 1888.
Complete Specification Left, 15th Nov.. 1888
Complete Specification Accepted, 31st Dec., 1885
68
Improvements in Machinery or Apparatus for Grinding the Flats
Used in Carding Engines.
دو
We JAMES EDWARD PLATT of Hartford Works, Oldham in the county of Lancaster,
Engineer and JAMES FIDLER of the same place Machinist, do hereby declare the
nature of this invention to be as follows:-
Our invention relates to machinery or apparatus for grinding the "flats" used in
carding engines and consists in improvements by means of which we are enabled to
grind "flats" readily and accurately.
29
25
We support the "flat" or "flats" to be ground upon bridge fixings or brackets
situate at opposite sides of the machine, each "flat" being supported upon the bridge
fixings or brackets by the portions of such "flat" which rest upon the "bend ог
"flexible bend" of the carding-engine when the said "flat" is in use. We so form
the portions of the bridge fixings or brackets upon which the "flats" rest while
being ground, that the surface of the "wire or teeth of each "flat" being ground
shall be in the same plane as the surface of the "wire" or teeth of the other flats
being ground. Beneath the "flat" or "flats" to be ground we place a grinding
roller rotated by any convenient means such roller being mounted in brackets, or in a
frame capable of being slidden backwards and forwards upon suitable guides.
traverse the grinding roller backwards and forwards at an uniform or nearly uniform
speed beneath each of the "flats" to be ground and for this purpose we employ a
pair of elliptical wheels which receive rotary motion in any convenient manner and
which by means of a stud and connecting rod cause the brackets or frame carrying
the grinding roller above-mentioned to be traversed backwards and forwards at an
uniform or nearly uniform speed beneath the "flats" to be ground or instead of
elliptical wheels we employ any other suitable arrangements by means of which the
grinding roller may be caused to move backwards and forwards at an uniform or nearly
uniform speed.
We
As the wire or teeth upon the "flats" being ground becomes or become shorter
we cause the grinding roller to be advanced towards the "flats" for which purpose
we employ a pawl which pawl is jointed to a fixed part of the machine.

page_text: The said pawl at times acts upon a ratchet wheel mounted upon a shaft provided
with a cam or cams the said shaft being carried by or connected to the brackets or
frame which carry or carries the grinding roller. The traversing backwards and
forwards of the grinding roller will cause the pawl to act upon the ratchet wheel and
thereby rotate the cam or cams before mentioned such cam or cams moving the
grinding roller nearer to the "wire" or teeth of the "flats" being ground.
We form a portion of the circumference of the ratchet wheel aforesaid without
teeth so that when the grinding roller has operated upon the "wire or teeth of the
"flats" to the desired extent the portion of the ratchet wheel upon which there are no
teeth will arrive beneath the pawl and no further rotation of the cam or cams will
take place and the grinding roller will cease to grind the "flats." When the first
"flat" or the first flats" of a "set" have been ground to the desired extent. we so
adjust the ratchet wheel that the pawl falls into the last tooth next to the blank portion
of the ratchet wheel or the portion of the ratchet wheel upon which there are no teeth.
When another "flat" or other flats" of the set above mentioned is or are to be
ground the ratchet wheel above referred to is turned in a direction opposite to that
in which it was turned by the pawl aforesaid.
The "flat" or "flats" to be ground is or are then placed upon the bridge fixings
or brackets previously mentioned to which they are secured by clips or in any other
suitable manner.
The grinding roller is then caused to traverse backwards and
forwards beneath the "flat" or flats" to be ground.
The pawl previously referred to will cause the ratchet wheel to be rotated until the
blank portion or portion without teeth arrives beneath the pawl and thus the "wire"
or teeth of the "flat" or "flats" will be ground to the same length as the wire or
teeth of that or those last operated upon. The grinding roller employed may be
sufficiently long to extend over the entire length of the surface of the "wire"
teeth of the "flat" or "flats" to be operated upon in which case a short longitudinal
23
traverse may be imparted to the grinding roller in any convenient manner or we
may use a grinding roller of the kind known as Horsfalls grinder."
"
"6
Dated this Fourteenth day of February 1888
or
W. T. CHEETHAM,
Carlton Chambers,
18, St. Ann's Street, Manchester,
Agent to the Applicants.

page_text: Improvements in Machinery or Apparatus for Grinding the "Flats"
Used in Carding-engines.
66
22
:)
or
We so form
We JAMES EDWARD PLATT of Hartford Works, Oldham, in the County of
Lancaster Engineer and JAMES FIDLER of the same place Machinist 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:-
Our Invention relates to machinery or apparatus for grinding the "flats" used in
carding-engines and consists in improvements by means of which we are enabled to
grind flats" readily and accurately.
We support the flat or
"flats" to be ground upon bridge fixings or brackets
situate at opposite sides of the machine each flat" being supported upon the bridge
fixings or brackets by the portions of such "flat" which rest upon the "bend
"flexible bend" of the carding-engine when the said "flat" is in use.
the portions of the bridge fixings or brackets upon which the "flats" rest while
being ground that the surface of the "wire" or teeth of each "flat" being ground
or teeth of the other flats
shall be in the same plane as the surface of the "wire
being ground. Beneath the "flat" or
to be ground we place a grinding
roller rotated by any convenient means such roller being mounted in brackets or in a
frame capable of being slidden backwards and forwards upon suitable guides. We
traverse the grinding roller backwards and forwards at an uniform or nearly uniform
speed beneath each of the "flats" to be ground and for this purpose we employ a
pair of elliptical wheels which receive rotary motion in any convenient manner and
which by means of a stud and connecting rod cause the brackets or frame carrying
the grinding roller above mentioned to be traversed backwards and forwards at an
uniform or nearly uniform speed beneath the "flats" to be ground or instead of
elliptical wheels we employ any other suitable arrangements by means of which the
grinding roller may be caused to move backwards and forwards at an uniform or
nearly uniform speed.
"Hats
25
The accompanying drawings illustrate our invention. Fig. 1 is an end elevation
and Fig. 2 is a front view of that which is shown in Fig. 1. The same letters of
reference are applied to corresponding parts in both of the figures.
a. a are side
framings connected together.by the cross frame b. As the parts situate at opposite
sides of the machine are similar we shall affix to corresponding parts the same letters
of reference. Formed in each of the side framings a. a are guides c in which and
capable of being slidden longitudinally therein is a slide or frame d. Upon each of
the slides or frames d are forined slides e, e in which and capable of being slidden
therein is a bracket supported in which and capable of being rotated therein is one
end of the axle g' of the grinding roller g.
In the lower end of each of the brackets is formed a bearing in which is
supported so as to be capable of being rotated therein one end of a shaft h. Upon

page_text: the shaft are formed or mounted cams j, j one at each end of the shaft h. Screwing
into each of the brackets f is a set screw f¹, the end f2 of which rests upon one of
the cams j. Carried by one of the slides or frames and capable of being slidden
longitudinally thercon is a bark upon which are formed toothed racks k¹, k² the teeth
of the rack taking into or engaging with the teeth of a wheel 7 fast upon the
shaft and the teeth of the rack 2 taking into or engaging with the teeth of a
wheel m mounted upon a stud m¹ secured to the slide or frame d. Fast with the
wheel m is a disc m³ to which is secured by bolts m³ and nuts a disc or plate n in
portions of the circumference of which are formed ratchet teeth n¹.
The disc or plate n will hereinafter be sometimes called the ratchet wheel n―The
heads of the bolts m³ pass into a circular groove formed in the disc m². Supported
by and capable of being rotated in bearings a¹ is a shaft o mounted upon one end of
which are the "fast" and "loose" pulleys of, 03. Fast upon the shaft o is a pulley o³ which
by means of an endless belt communicates rotary motion to a pulley g² fast upon the
axle g of the grinding roller 7. To avoid confusion the pulleys o¹, 02, 0³ and g² are
not shown in Fig. 1 of the accompanying drawings.
Fast upon the shaft o is a worm of the screw threads of which gear into or engage
with the teeth of a wheel p fast upon a short shaft pl carried by and capable of being
rotated in a bracket a³ secured to one of the side framings a. a. Fast upon the
shaft is a worm p² the screw-threads of which gear into or engage with the teeth
of a wheel y fast upon a tubular collar g' capable of being rotated upon a stud 1.
Fast upon the tubular collar q' is an elliptical wheels which gears into an elliptical
wheel & fast upon a short shaft t¹ supported by and capable of being rotated in a
boss a formed upon one of the side framings a.
Secured in a slott formed in a
part 3 fast with the elliptical wheel t is a crank pin t* embraced by a connecting rod u
the other end of which embraces a pin projecting from an arm v fast upon a shaft w
supported by and capable of turning in bearings as formed in the side framings a.
Fast upon the shaft w are arms a each of which is formed with a jaw a¹ which
embraces a step mounted upon a stud projecting from and secured to the slide
or frame d-Secured to the part as of each of the side framings a, which part a®
forms a bridge bracket or fixing is a bracket y. Each of the brackets y is provided
with studs y. Each of the studs y' is provided with a clip y2 in which is formed a
hole through which the said stud y extends. Each of the studs y' is formed with
screw threads upon which and capable of being screwed thereon is a nut y³. Upon
each of the brackets y we form facings. The ends 1" of the "flat" 1 to be ground
are supported upon the facings the portions of the "flat" 1 which rest upon the
facings being those which rest upon the "bend" ог flexible bend" of the carding-
engine when the said "flat" 1 is in use.
The machine illustrated in the accompanying drawings is arranged for grinding
two "flats" simultaneously.
"
2.
The "flats" to be ground are secured by the clips y³ and nuts y³ upon the facings z
The shaft o being caused to rotate by means of the pulley o rotary motion will be
communicated to the grinding roller g. The rotation of the shaft o will by means
of the worm o, wheel p, worm. p², wheel and elliptical wheels and t cause the
crank pin to revolve. The revolution of the crank pin t will by means of the
connecting rod u, arm e, shaft w, arms a, jaws a¹, steps a² and pins d' cause the slides
or frames d to be traversed to and fro longitudinally and thereby cause the grinding
roller g to be traversed beneath the "flats" 1 which are to be ground. The ellip-
tical wheels s and t will cause the grinding roller g to be traversed backwards and
forwards at an uniform or nearly uniform speed. When the slides or frames dare
being moved in the direction indicated by the arrow A the teeth n¹ of the ratchet
wheel will arrive against the pawl 2 mounted upon the stud 3 secured to one of the
side frames a, the pawl 2 being at liberty to be turned in the direction indicated by
the arrow B but prevented from descending below the position in which it is shown,
by a pin or by any other convenient means. The to and fro motion of the slides or
frames d will cause the teeth n¹ of the ratchet wheel n to be acted upon by the pawl 2
so as to cause the said ratchet wheel n to be turned and by means of the wheel m

page_text: ::
rack, rack and wheel cause the shaft to be turned and thereby cause the
cams to raise the brackets so as to cause the grinding roller y to be moved
nearer to the wire or teeth of the flats" 1 being ground. Each movement of the
slides or frames d in the direction indicated by the arrow A will cause the pawl 2 to
turn the ratchet wheel in the direction indicated by the arrow C, thereby causing
We form a
the grinding roller g to act upon the "wire" or teeth of the "flats" 1.
portion of the circumference of the ratchet wheel n aforesaid without teeth so that
"wire
when the grinding roller has operated upon the
or teeth of the "flats" 1
to the desired extent, the portion n² of the ratchet wheel n upon which there are no
teeth will arrive beneath the pawl 2 and no further rotation of the cams j.j will take
place and the grinding roller g will cease to be raised towards the "flats" 1. When
the first "flat" or the first "flats" of a "set" have been ground to the desired extent
the ratchet wheel 2 is so adjusted by means of the bolts m³ and nuts that the pawl 2
falls into the last tooth next to the blank portion n² of the ratchet wheel n
or portion of the ratchet wheel upon which there are no teeth whereupon
the further movements of the slides or frames d in the direction indicated
by the arrow A will take place without causing any further raising of the
grinding roller g.. When another "flat" or other "Hats" of the "set above
mentioned is or are to be ground the ratchet wheel above referred to is turned in a
direction opposite to that indicated by the arrow C so that the cams j.j will be turned
into the position in which they are shown in the drawings, so that the grinding
roller will be allowed to descend clear of the "wire" or teeth of the flats 1 and
the pawl 2 is turned back so that it will not act upon the ratchet wheel n. The
nuts y³ are then turned so as to liberate the clips y2 and the flats 1 are removed. Two
more "flats" of the "set" to be ground are then secured upon the facings by
means of the nuts y³ and clips y² previously described. The pawl 2 is then turned so
as to act upon the ratchet wheel n and so as to cause the grinding roller g to bo
raised and grind the "wire" or teeth of the "flats." The pawl 2 will again cause
the ratchet wheel to be turned until the blank portion n² of the ratchet wheel n
or the portion. 2 of the ratchet wheel n which is without teeth arrives beneath the
pawl 2 and thus the " wire or teeth of the "flat" or "flats" will be ground to the
same length as the "wire" or teeth of that or those last operated upon.
29
"
The grinding roller employed may be sufficiently long to extend over the entire
length of the surface of the "wire" or teeth of the "flat" or "flats" to be operated
upon in which case a short longitudinal " traverse" may be imparted to the grinding
roller in any convenient manner or we may use a grinding roller of the kind known
as Horsfalls grinder."
The machines constructed according to our invention may be made to hold one
"flat" or two or more "flats" while the "wire" or teeth of such "flat" or "flats"
is or are being ground.
By means of the screws f¹ the grinding roller 9 may be adjusted relatively to the
facings z on the brackets
y.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
" or teeth of which is or are to
1. For carrying the "flat" or "flats" the "wire
be ground the brackets y herein before described each provided with a facing or facings
to support one end of the said "flat" or of each of the said flats" and
as hereinbefore
constructed, arranged, employed and operating substantially
described in reference to and indicated in and by the accompanying drawings.
2. To enable the grinding roller to be traversed backwards and forwards beneath
the "flat" or "flats" the wire or teeth of which is or are to be ground the slides or
frames d and brackets fall constructed, arranged, employed and operating sub-
stantially as hereinbefore described in reference to and indicated in and by the
accompanying drawings.
3. To traverse the grinding roller backwards and forwards beneath the "flat" or

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"flats" at an uniform or nearly uniform speed while the said grinding roller is
grinding the "wire" or teeth of the "flat" or flats, the elliptical wheels s and t,
crank pin t, connecting rod u, pin v¹, arm v, shaft w, arms, steps a², and studs d'
all constructed, arranged, employed and operating substantially as and for the
purposes herein before described in reference to and indicated in and by the
accompanying drawings.
4. For raising the grinding roller towards the "flat" or "flats" the "wire" or
teeth of which is or are to be ground the pawl 2, the ratchet wheel n provided with
teeth n and a blank portion n² or a portion without teeth, the wheel m, the rack k³,
the rack, the wheel 1, the cams j. j and brackets fall constructed; arranged,
employed and operating substantially as and for the purposes hereinbefore described
in reference to and indicated in and by the accompanying drawings.
Dated this Fourteenth day of November 1888.
W. T. CHEETHAM,
Manchester,
Agent to the Applicants.