or Improved Mechanism for Facilitating the Grinding of Revolving Flats in Carding Engines.
Year: 1893

page_text: Date of Application, 31st May, 1893
Complete Specification Left, 28th Feb., 1894-Accepted, 31st Mar., 1894
PROVISIONAL SPECIFICATION
New or Improved Mechanism for Facilitating the Grinding of
Revolving Flats in Carding Engines.
We, JOSEPH GARSIDE of 26 Taylor Street, Dukinfield, Mechanic, and
JAMES MELLOR of 26 Keane Street, Oldham Road, Aston-under-Lyne, Carder,
do hereby declare the nature of our said invention to be as follows:-
"
Hitherto for grinding card flats it has been the practice to employ what is known
as a "horned" bracket, fixed to the card bend or side, and over which "horned
bracket each of the flats is drawn and elevated against the underside of the grinding
roller. This arrangement is productive of uneven grinding, the "horned bracket
or the flats (which vary in their degree of hardness) becoming worn away and
causing the card teeth to pass under the roller in an irregular manner.
"
Now our invention has for its object to more perfectly and truly feed the card
flats to the grinding roller from the working part and consists in adapting a T shaped
piece of metal (hereinafter called the T piece) over the top or horizontal portion of
which the ends of the card flats travel. The shank or vertical portion of said T piece
passes through an opening in a "filbow or bracket bolted to the ordinary grinding
roller bracket and surrounding said shank is a spiral or volute spring pressing
against the "filbow at one end and against the underside of the horizontal portion
of the T piece at the other end.
"
"
Also fixed or secured to the grinding roller bracket is another smaller bracket
which at the top overhangs the T piece and is formed flat upon the underface to
coincide with the working or inclined surface of the card flat and said surface is
curved out or inclined to a degree corresponding to the incline on the flats.
It will now seen that by passing the card flats over the T piece the spring will
constantly keep each flat well up against the overhanging bracket or incline and so
compensate for any wear either in the overhanging bracket or in the flats. The
tension of the spring may be varied by moving the "filbow" up or down the grinding
roller bracket, a slot being formed to allow for this and a screw and nut to fix it at
any desired position.
As the card flats travel along over the T piece they are each brought into contact
with the overhanging bracket or incline and are then gradually, but surely, brought by
the T piece previous to passing under the grinding roller and during the entire
period in which the card flats are in contact with the roller to a position parallel
with said bracket.
The card teeth therefore whilst in contact with the roller pass under the same in
a regular manner and do not vary in position as heretofore.
The extremities of the T piece are curved or rounded off to allow the flats to pass
over more readily and the top edge of said T piece is recessed or shouldered down
at one portion to allow each flat as soon as it has been ground to immediately retire
and make room for the next flat.
Dated this 30th day of May 1893
JOHN G. WILSON & Co.,
Agents.

page_text: COMPLETE SPECIFICATION.
New or Improved Mechanism for Facilitating the Grinding of
Revolving Flats in Carding Engines.
We, JOSEPH GARSIDE of 26 Taylor Street, Dukinfield, Mechanic, and
JAMES MELLOR of 26 Keane Street, Oldham Road, Ashton-under-Lyne, Carder,
do hereby declare the nature of our said invention and in what manner the same is to
be performed to be particularly described and ascertained in and by the following
statement:-
"
Hitherto for grinding card flats it has been the practice to employ what is known
as a "horned" bracket, fixed to the card bend or side, and over which "horned
bracket each of the flats is drawn and elevated against the underside of the grinding
roller. This arrangement is productive of uneven grinding, the "horned "bracket
or the flats (which vary in their degree of hardness) becoming worn away and
causing the card teeth to pass under the roller in an irregular manner.
Now our invention bas for its object to more perfectly and truly feed the
card flats to the grinding roller by feeding the working face of each flat against
an abutment and consists of the apparatus hereinafter described and illustrated
on the accompanying drawings in which Fig. 1 is a front view of so much of
a card flat and the grinding roller of a carding engine as is necessary to illustrate
the application of our invention. Figs. 2 and 3 are transverse sectional views
of Fig. 1 on lines a-b and c-d. Figs. 4, 5, 6, 7 and 8 are detail views on an
enlarged scale.
In accordance with our invention we employ a T shape piece of metal (A)
(hereinafter called the T piece) over the top or horizontal portion of which the
ends of the card flats (B) travel. The shank or vertical portion of the T piece
passes through an opening in the "filbow " (C) bolted to the ordinary grinding
roller bracket (D) and surrounding said shank is a spiral spring (E) pressing
against the "filbow" (C) at one end and against the underside of the horizontal
portion of the T piece at the other end. Also fitted or secured to the grinding
roller bracket is another smaller bracket (F) which at the top overhangs the
T piece (A) with an elongated bar of metal (G) the underside of which is more
or less curved and shaped to the peculiar formation seen in Fig. 5. On passing
the card flats over the T piece which is pressed up by the spring (E) the
working face of each flat will be pressed up against the overhanging bar (G)
and as such flats are revolved the peculiar shape of the bar causes them to pass
under the bar in a manner which will cause them to be truly and correctly ground.
This is more clearly demonstrated in Figs. 6, 7 and 8 on Sheet 2 of the drawings,
which illustrate three stages of the grinding of a card flat. Fig. 6 shews the
position of the flat at the moment the card wires first come into contact with the
grinding roller, for grinding the "heel" of the card, Fig. 7 shews the flat a
little further advanced and the grinding roller in contact with the
sole or central
portion of the card flat and Fig. 8 illustrates the flat still further advanced, the
grinding roller being in contact with the "toe."
"
In this way the peculiar form of the bar (G) causes the card teeth to pass under
the grinding roller in a manner which gives them the right grinding angle. Moreover
the said bar also causes the card teeth when in the position shewn in Fig. 7 to be
hollow ground, a feature of great importance in good carding by reason of getting
more wire on the cylinder. The advantage of so elevating the card flats as
aforesaid is that the face which presses against the bar (G) is the same face which
travels upon the cylinder bend and therefore if any wear takes place in passing
under the bar (G) it does not affect the position of the card teeth in passing over
the cylinder.

page_text: The extremities of the T piece are curved or rounded off as illustrated to allow
the flats to pass over more readily and the top edge of said T piece is recessed or
shouldered down at (H) to allow each flat as soon as it has been ground to
immediately retire.
Having thus particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that
what we claim is :-
In apparatus for grinding the revolving flats or carding engines the use and
employment of the bar (G) formed more or less as shewn in Fig. 5 in
combination with a T piece (A) filbow (C) spring (E), bracket (F) when mounted
and operating substantially as hereinbefore described and illustrated on the
accompanying drawing.
Dated this 27th day of February 1894.
JOHN G. WILSON & Co.,
Agents.