Improvements in Machinery for Grinding and Trueing the Wire Points of Card Flats.
Year: 1892

page_text: Date of Application, 3rd Dec., 1892
Complete Specification Left, 4th Sept., 1893-Accepted, 2nd Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Grinding and Trueing the Wire
Points of Card Flats.
I ALFRED HITCHON of Globe Works, Accrington, in the County of Lancaster,
Machine Salesman, do hereby declare the nature of this invention to be as
follows:-
This invention relates to machinery for purpose aforesaid, and comprises
appliances constructed and operated for the purpose of ensuring the points of card
teeth being ground to an uniform surface, and in order to effect this object. Two
flats are laid on radial arms (carding points of the wire upwards) said arms having
an oscillating movement imparted thereto by means of revolving cams carrying the
flats in direction parallel to the length of the grinding roller, and to the centre of
the latter, and thereby to effect the curvilinear grinding of the surface of the wire
according to the length of the oscillating arms, such arms being mounted loosely
on eccentric shafts which make partial revolutions in proportion to the required
movement of the radial arms. The flats being held in said radial arms the action
of revolving the eccentric shaft aforesaid gives a rising and falling movement of
the flats nearer to or further from the grinding rollers thereby regulating the
amount of grinding.
1 also make use of two like radial arms swinging on eccentric shafts above the
grinding rollers centre, and these have a similar motion for effecting the required
grinding. Each arm is provided with seatings on which the working seatings of the
flats are received so that the latter are ground in the same position as when working,
said seatings are independently adjustable by index screws so as to ensure uniform
and even grinding throughout.
The eccentric shafts carrying the radial arms are controlled and regulated by
quadrant levers which are provided with adjustable stops for purpose of determining
the amount of movement of the eccentric shaft, so that uniformity is ensured of the
radial arms seatings to the grinding surface.
Each quadrant lever that works the eccentric shaft is automatically drawn
towards the aforesaid stop by means of pulleys and bands, or like contrivance.
After the movement of the radial arms has been arrested by the adjustable stops
referred to I provide means of allowing (through an automatic motion) that such
radial arms shall be retained in a normal position until the pressure is put upon the
Hats, and which forces the points of the wires against the grinding rollers, and
which pressure to some extent bends, or deflects the points of the wires out of
position, and the grinding proceeds until such deflected length is ground away.
The stops referred to are in the form of a revolving pinion having a slow
revolving motion imparted through ratchet, pawl, and pinion worked from the move-
ment of the radial arms, the stop is adjustable in the quadrant lever which consists
of two segments of a toothed wheel of different diameters, one mounted centrically
and the other eccentrically in the same stud the action being that when such
quadrants come in contact with the stop pinion a movement is imparted to one of
the quadrants, and after having traversed through a certain quantity of teeth the
lesser diameter of quadrant brings the second quadrant in contact with the same
pinion which has the action of pushing back the quadrant lever on which it is
mounted thereby withdrawing such flats from the grinding roller through the action
of the eccentrically mounted quadrant.
Dated this 2nd day of December 1892.

page_text: COMPLETE SPECIFICATION.
Improvements in Machinery for Grinding and Trueing the Wire
Points of Card Flats.
I ALFRED HITCHON of Globe Works Accrington in the County of Lancaster,
Machine Salesman 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 machinery for purpose aforesaid, and comprises
appliances constructed and operated for the purpose of ensuring the points of card
teeth being ground to an uniform surface, and in order to effect this object. Two
flats are laid on radial arms (carding points of the wire upwards) said arms having
an oscillating movement imparted thereto by means of revolving cams, in direction
parallel to the length of the grinding roller, and to the centre of the latter, and
thereby to effect the curvilinear grinding of the surface of the wire according to
the length of the oscillating arms, such arms being mounted loosely on eccentric
shafts which make partial revolutions in proportion to the length of the radial
arms movement. The flats being held in said radial arms the action of revolving
the eccentric shaft aforesaid gives a rising and falling movement of the flats nearer
to or further from the grinding rollers thereby regulating the amount of grinding. I
also make use
of two like radial arms swinging on eccentric shafts above the grinding
rollers centre, and these have a similar motion for effecting the required grinding.
Each arm is provided with seatings on which the working seating of the flats are
received so that the latter are ground in the same position as when working, the
said seatings are independently adjustable by index screws so as to ensure uniform
and even grinding throughout the entire surface of the carding wire. The eccentric
shafts carrying the radial arms are controlled & regulated by quadrant levers which
are provided with adjustable stops for purpose of determining the amount of move-
ment of the eccentric shaft, so that uniformity is ensured of the radial arms seatings
being brought nearer to the grinding rollers surface in unison.
Each quadrant lever that works the eccentric shaft is automatically drawn
towards the aforesaid stop by means of pulleys and weighted bands, or like
contrivance. After the movement of the radial arms has been arrested by the
adjustable stops referred to, I provide means of allowing through a motion given to
ratchet wheel that such radial arms shall be retained in a normal position until the
pressure is put upon the flats and which pressure to some extent bends, or deflects
the points of the wires out of position, and the grinding proceeds until such deflected
length is ground away.
о
The stops referred to are in the form of a revolving pinion having a slow
revolving motion imparted through ratchet paul and pinion, worked from the
movement of the radial arms, the stop is adjustable in the quadrant lever which
consists of two segments of a toothed wheel of different diameters, one mounted
centrically and the other eccentrically in the same stud, the action being that when
such quadrants come in contact with the stop pinion a movement is imparted to one
of the quadrants, and after having traversed through a certain quantity of teeth
the lesser diameter of quadrant brings the second quadrant in contact with the same
pinion, which has the action of pushing back the quadrant lever on which it is
mounted, thereby withdrawing such flats from the grinding roller through the
action of the eccentrically mounted quadrant.
It will be fully described with reference to the accompanying two sheets of
drawings in which sufficient portion of the machine is shown to illustrate what this
invention applies to, Sheet 1 Fig. 1 a being an end view of frame end showing
position of the various parts in relation to the grinding roller b. c being the two
lower radial arms that support the two flats in contact with the under side of the
grinding roller, each radial arm has the radial movement given to them by cam da

page_text: Same like pair of cams e operate the radial arms c¹. This pair of radial arms c¹
carry the pair of flats as shown above the grinding roller at f, each seating of these
arms at the part where the flats rest on is separately adjustable to or from the outer
surface of the grinding roller by index screw bolt fixings, so that each flat end can
be brought with equal distance of the grinding roller, the two upper radial arms c¹
and same like under radial arms are mounted on eccentrics which are secured to
cross shaft g, these cross shafts control and work the eccentrics aforesaid through
the aid of a quadrant lever o being secured to each shaft 9 the upper shafts
having the levers o placed as shewn in the drawing and the lower shafts g having
similar levers set in the same relationship to the roller b & the shafts g the
operation being thus, when a flat is placed on the seating of the radial arm a
partial movement of the quadrant lever brings the irregular surface point of the
flat against the grinding roller, such quadrant lever further revolvs its eccentrics
and shaft by the pulling action of the draw band h until the same is arrested by
the quadrant wheels coming in contact with the constant revolving pinion of stud
wheel which in turn comes in contact with the outer spur toothed quadrant j
which in turn is driven by revolving pinion k. Pinion is of sufficient width to
gear with a secondary inner tooth quadrant I, the teeth of the secondary quadrant
being of an increasing diameter is driven by pinion k until it reverses the lever
backward on which it is mounted and thereby withdraws the flat from the grinding
roller to prevent any further grinding taking place. It will be understood that
segment quadrant gives any predetermined time for flats being in contact with
grinding roller before the same brings in operation the second segment quadrant 1,
that takes away the radial mounted flats from the grinding roller's surface thus
arresting any further grinding. m is the ratchet paul catch for driving ratchet
wheel n. Fig. 2 Sheet 1 shows to an enlarged scale eccentric bush for taking away
or bringing the flat nearer to grinding roller b also the index micrometer screw
bolt for separate adjustment of each flat end to or from the grinding roller, and
better illustrate the curvilinear ground surface of the flats points, through the flats
being mounted on radial arms while the same is ground, Sheet 2 Figs. 3 & 4. The
quadrant arm o and the segment stop wheels and I are shown in connection with
the wheel k and ratchet wheel n to a larger scale.
It is obvious that while the segment wheel j is in gear with wheel k that the
quadrant arm o will remain stationary, but when the segment j has been turned to a
certain point, it brings the outer segment in gear with the wheel k. This wheel/
being of greater radius at one end than wheel j causes the quadrant arm o to be
pushed back (as shown in dotted lines) thus turning the eccentric which lifts the
radial arm with flat away from the grinding roller.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
The mounting of carding engine flats on oscillating radial arms (or other like
equivalents) for grinding the points of card clothing to an equal length and of a
curvilinear shape across the flat surface. The flats while being ground are auto-
matically brought against the grinding roller and are afterwards held in a normal
position for a predetermined length of time, and then automatically withdrawn.
Whereby any quantity of flats can be equally ground and alike as described and
illustrated on the two sheets of drawings.
Dated this 2nd day of September 1893.
ALFRED HITCHON,
Applicant.