Improvements in Certain Apparatus for Grinding the "Revolving Flats" employed in "Revolving Flat Carding-engines.
Year: 1892

page_text: Date of Application, 23rd June, 1892
Complete Specification Left, 23rd Mar., 1893-Accepted, 29th Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in Certain Apparatus for Grinding the "Revolving
Flats" employed in "Revolving Flat Carding-engines.
I, WILLIAM HALL RICHARDSON of 48 Derker Street, Oldham, in the County of
Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to the type of apparatus for grinding the "revolving
flats" employed in revolving flat carding-engines which is described in the
Specification of Letters Patent granted to Thomas Clegg and Thomas Lucas
dated February 19th 1874 and numbered 623 and my invention is applicable in all
cases in which the revolving flats while being ground are caused to bear with their
working faces or surfaces against wedges or blocks or equivalent devices sliding
upon or in guides arranged in a suitable position in relation to the grinding roller
employed.
Hitherto in arrangements of apparatus of the type above described the wedges
or blocks or equivalent devices sliding upon or in guides arranged in a suitable
position in relation to the grinding roller employed have been provided with
projecting parts with which the edges of the flats being ground have been caused to
engage in order that the said blocks or wedges or equivalent devices may be caused
to move along with each flat while it is being ground. In consequence of the said
projecting parts being immovable in relation to the blocks or wedges or equivalent
parts upon which they are formed it has been found necessary to provide arrange-
ments to act upon the flats in order to cause them to be disengaged from the said
blocks or wedges or equivalent devices when the grinding operation is completed.
My invention consists in means by which I enable the blocks or wedges or
equivalent devices employed in a flat grinding apparatus constructed according to
my invention to release each flat when it has been ground and thus render it
unnecessary to act upon the flats by any subsidiary means in order to disengage
them when ground from the blocks or wedges or equivalent devices employed in
"flat grinding apparatus" of the type above mentioned.
According to my invention I provide each of the sliding blocks or wedges or
equivalent devices employed in a flat grinding apparatus constructed according to
my invention with a projecting part connected to the said block or wedge by means
of a hinge or pivot or in any other suitable manner so that it may be capable of
being turned in relation to or receding from the said block or wedge or equivalent
device when the flat in contact with the said block or wedge or equivalent device
has been ground. I so arrange the apparatus that when the block or wedge or
equivalent device above mentioned is in position to receive one end of a flat to be
ground and while such flat is being ground the guide or part in or upon which the
said block or wedge or equivalent device slides will hold the projecting part afore-
said in position to be acted upon by the flat but when the said flat has been ground
the said projecting part shall arrive at a recess or opening formed in the guide or
part upon or in which the block or wedge or equivalent device above mentioned is
mounted and be free to be turned or moved either by the pressure exerted
upon it by the flat or by means provided for the purpose, so as to allow the
flat to pass over it and allow the block or wedge or equivalent device to be moved
by the arrangements employed for the purpose, into position to receive the next flat
to be ground. While the block or wedge or equivalent device is being moved into
position to receive the next flat to be ground the projecting part above mentioned
will be turned into position to be acted upon by the edge of the said flat. My
invention by rendering it unnecessary to act upon the flat which has been ground to

page_text: disengage it from the blocks or wedges or equivalent devices against which it bears
while being ground simplifies the apparatus employed in grinding the revolving
flats of revolving flat carding engines and also efficiently prevents the sliding blocks
or wedges or equivalent devices from continuing too long in engagement with the
flat which bas been ground and so causing injury either to the carding-engine or to
the apparatus by which the flats are ground.
Dated this Twenty-second day of June 1892.
HOWARD
CHEETHAM,
Manchester, Agent to the Applicant.
COMPLETE SPECIFICATION.
+6
Improvements in Certain Apparatus for Grinding the Revolving
Flats" employed in Revolving Flat Carding-engines."
66
I, WILLIAM HALL RICHARDSON, of 48 Derker Street, Oldham, 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 :-
My invention relates to the type of apparatus for grinding the " revolving
flats employed in revolving flat carding-engines which is described in the
Specification of Letters Patent granted to Thomas Clegg and Thomas Lucas,
dated February 19th 1874, and numbered 623, and my invention is applicable in all
cases in which the revolving flats while being ground are caused to bear with their
working faces or surfaces against wedges or blocks sliding upon or in guides
arranged in a suitable position in relation to the grinding roller employed. It is
absolutely necessary in this type of apparatus that the wedges or blocks should
always be returned to their normal position when released from the flat just
ground, in time to receive the next flat to be ground, otherwise irregular grinding
of the wire of the flats will be the result.
My invention consists in means by which I enable the blocks or wedges
employed in a flat grinding apparatus constructed according to my invention to
release each flat when it has been ground and also enable the blocks or wedges to
return to their Dormal position in time to receive the next flat and thus render it
unnecessary to act upon the flats by any subsidiary means in order to disengage
them from the blocks or wedges employed in "flat grinding apparatus" of the
type above mentioned.
According to my invention I provide each of the sliding blocks or wedges
employed in a flat grinding apparatus constructed according to my invention
with a projecting part connected to the said block or wedge by means of a hinge
or pivot so that it may be capable of being turned in relation to the said block or
wedge when the flat in contact with the said block or wedge has been
ground. I so arrange the apparatus that when the block or wedge above
mentioned is in position to receive one end of a flat to be ground and while
such flat is being ground the guide or part in or upon which the said block
or wedge slides will hold or lock the projecting part aforesaid in position to be
acted upon by the flat as securely as if it formed one piece with the block or
wedge but when the said flat has been ground the said projecting part shall arrive
at a recess or opening formed in the guide or part upon or in which the block or
wedge above mentioned is mounted when it will be set free to be turned or moved
by the pressure exerted upon it by the flat so that the wedge or block and flat
will be released from each other and the block or wedge will be returned by the
arrangements employed for the purpose, into the proper position for receiving the
next flat to be ground. The return of the block or wedge will put back and
relock the projecting part above mentioned in position to be acted upon by the
edge of the flat next to be ground.

page_text: In order that my invention may be more easily understood and more readily
carried into effect I will now proceed to further describe it with reference to the
accompanying drawing in which
Fig. 1 is a side elevation partly in section of a flat grinding apparatus of the
type above mentioned with my invention applied thereto and Fig. 2 is a section
taken on the plane indicated by the line (E) (E) of Fig. 1.
Fig. 3 is a side elevation partly in section of part of the apparatus shown in
Fig. 1 and illustrates the position which certain parts occupy when the grinding
of a flat has been completed.
Fig. 4 is a side elevation, and Fig. 5 a plan showing certain parts detached.
It will be obvious that although the accompanying drawing shows only the parts
at one side of the carding-engine like parts are employed at each side of the
carding-engine.
In the accompanying drawing (a) is the grinding roller which is supported in
bearings of any suitable form which are made adjustable in position upon the
brackets or fixings (b) which are as usual mounted upon the bends of the carding-
engine. Each of the brackets or fixings (b) has secured to it a bridge-bracket (c)
in which is formed a groove or passage which is partly enclosed by the plate (c)
and has mounted in it a bar (d) which is capable of being slidden to and fro
longitudinally. For convenience and in order to avoid confusion I will now
confine the further description of the parts shown in the drawing and of my
invention, to the parts at one side of the carding-engine. The bar (d) is connected
to one end of a chain (e) the other end of which is connected to a boss (el)
mounted upon a short shaft (e²) carried by the extended arm (61) of the bracket or
fixing (b). Upon the shaft (2) is mounted a weighted lever (f) which causes the
boss (e) to tend to turn in the direction indicated by the arrow (A) and move the
bar (d) into the position in which it is indicated in Fig. 1. The bar (d) is
provided with a wedge or block (g) against which one end of each flat to be
ground is caused to bear with its working or bearing face. The wedge or block (g)
is made of such form that the flats which are being ground shall be held in the
proper position for the wire surfaces thereof to be ground in the manner required.
The flats to be ground of which one only is shown in the accompanying drawing
are successively pressed into contact with the wedge or block (9) by means of a
weight (2) mounted upon an arm (¹) secured upon the outer end of a stud (h)
formed upon an arm (i) which acts upon a sliding bracket or lifter (j) mounted
so as to be capable of being slidden in guides formed in a block (k) secured upon
the bracket or fixing (b). As is indicated in the accompanying drawing the set
screw (1) employed to secure the sliding bracket or lifter () in the block (k) in
which it is mounted is so formed as not to interfere with the necessary upward and
downward movements of such sliding bracket or lifter (j) which is provided with
a slot through which the set screw (¹) passes. The upper part of the bracket (k)
which is secured to the bracket or fixing (6) serves to support and guide the
revolving flats while passing to and from the sliding bracket or lifter (j). (p) is.
the projecting part which is connected to the sliding block or wedge (g) by means
of a hinge or pivot (p¹) in accordance with my invention so that it may be capable
of being turned in relation to, or of receding from, the said block or wedge (g)
when the flat in contact with the said block or wedge (9) has been ground. The
hinge or pivot (p¹) is caused to pass through a projection (p²) at the back or upper
side of the projecting part (p) and through the bar (d). The upper surface of
the projection (22) is so placed in relation to the hinge or pivot (p¹) that when
the sliding block or wedge (g) is in position as in Fig. 1 to receive one end of a
flat to be ground, the said upper surface of the projection (p2) will be in contact
with the back of the groove in the bridge-bracket (c) which will form a guide or
support for such projection (p2). In consequence of the upper surface of the pro-
jection (2) being in contact with the back of the said groove the projecting part (p)
will be held or locked in position in relation to the wedge or block (g) to be acted
upon by the flat to be ground when such flat being moved in the direction indicated

page_text: by the arrow (C) arrives in contact with the sliding block or wedge (g) and the
projecting part (p), at which time the position of the flat will be determined by
the wedge or block (g). By the action which the flat being ground has upon the
projecting part (p) the projecting part (p) and sliding block or wedge (g) will be
moved with the said flat in the direction indicated by the arrow (D). The upper
surface of the projection (p²) will continue in contact with the back of the groove
in the bridge-bracket (c) and so maintain the projecting part (p) in the position
relative to the sliding block or wedge (g) in which it is indicated in Fig. 1 until
the wire surface of the flat which is being ground passes clear of the grinding
roller (a). When the wire surface of the said flat passes clear of the grinding
roller (a) the projecting part (p) and the projection (p2) thereon will have arrived
opposite to a recess (2) formed in the bridge-bracket (c) so that the upper surface
of the projection (p2) will no longer be supported or locked by the back of the
groove in the bridge-bracket (c) in which the bar (d) is mounted. The pressure of
the flat aforesaid against the projecting part (p) will then cause such projecting
part (p) to turn upon the hinge or pivot (p) into the position in which it is
indicated in Fig. 3 so that the flat which at such time passes clear of the lifter or
block () will be set at liberty to pass out of contact with the projecting part (p).
As soon as the flat which has been ground passes out of contact with the projecting
part (p) the sliding block or wedge (g) will be moved by the weighted lever (f)
back into the position in which it is indicated in Fig. 1 and while the said sliding
block or wedge (9) is being moved back into the position in which it is indicated
in Fig. 1 the projection (p2) will be restored to its normal position by the back of
the groove in the bridge-bracket (c) so as to be again in the position relative to the
sliding block or wedge (g) in which it is shown in Fig. 1 in readiness to be acted
upon by the next flat to be ground. The projecting part (p) and the projection (p²)
are shown more clearly in Figs. 4 and 5 in which it is indicated that the pro-
jection (2) is formed with a recess (p³) in order that when such projection (p) is
opposite to the recess (c2) formed in the bridge-bracket (c) the projecting part (p)
may be turned so as to fully liberate itself and the flat which has been ground.
The employment of the hinged projecting part (p) in the manner above described
secures that it shall be held or locked in position to be acted upon by the flat as
securely as if it formed one piece with the block or wedge (g) ad in conjunction
with the recess (c) in the bridge-bracket (c) in which the b: (d) is mounted
ensures the release of the wedge or block (g) and the flat which
been ground
and permits the wedge or block (g) to return to its normal position in time to
receive the next flat.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I do e that what I
claim is :-
In a flat grinding apparatus having sliding blocks ch as (9), the projecting
parts (p) connected to the blocks (9) by hinges or pivots, in combination with
guides or parts in or upon which the said blocks slide, and the recesses (c²), all
arranged, employed and operating for the purpose and substantially in the manner
hereinbefore described and illustrated in and by the accompanying drawing.
Dated this Twenty-second day of March 1893.
HOWARD CHEETHAM,
Manchester, Agent to the Applicant.