An Improved Means or Method of Fixing Double or Trough Shaped Saw Teeth to the Rollers Employed in Machinery for Opening or Preparing Fibrous Substances.
Year: 1886

page_text: Date of Application, 23rd Sept., 1886.
Complete Left, 18th June, 1887.
Complete Accepted, 5th Aug., 1887.
An Improved Means or Method of Fixing Double or Trough Shaped
Saw Teeth to the Rollers Employed in Machinery for Opening
or Preparing Fibrous Substances.
We, EZRA SYKES, of the firm of John Sykes and Sons, of Huddersfield, Yorkshire,
Machine Makers, and ELI WILKINSON of Marsden, near Huddersfield, Waste Opener
do hereby declare the nature of our invention for "AN IMPROVED MEANS OR METHOD
OF FIXING DOUBLE OR TROUGH SHAPED SAW TEETH TO THE ROLLERS EMPLOYED IN
MACHINERY FOR OPENING OR PREPARING FIBROUS SUBSTANCES to be as follows :-
"
This invention has reference to means to be employed in fixing double or trough
shaped saw teeth to the rollers of opening and preparing machinery, and this we
accomplish by cutting or forming spiral or other grooves in or on the periphery of
such rollers, and afterwards inserting such trough shaped teeth into the said grooves,
but so arranged that the teeth stand above the surface of the rollers. In order to
fasten the teeth into the said grooves, we insert and "mill" into the trough a key or
plain narrow band of metal which forces the sides thereof against the sides of the
grooves.
The saw teeth may be hardened and tempered either before being inserted into the
grooves or afterwards.
When very fine grooves are cut in the rollers and the teeth placed close to each
other for operating upon fine fibre, the grooves cut in the metal roller (which is cast
metal) are frequently snipped when milling the teeth into the grooves, and also when
taking the teeth out again for the purpose of inserting new teeth.
To prevent such breakages we place in the groove made in the cast metal roller a
wrought iron or steel strip, which strip is deep enough to stand up prominent above
the periphery of the roller, thereby forming a groove having wrought iron or steel
sides, and into these grooves we insert the trough shaped saw teeth as previously
explained.
By these means the teeth can be placed very close together, and the wrought iron
or steel grooves are not indented nor broken when milling in the teeth, as may be
the case when they are inserted into cast iron grooves.

page_text: It will be understood by those conversant with the trade that in covering rollers
with these compound or trough shaped teeth that many lengths are required to cover
a roller from end to end, as they cannot conveniently be made long enough to reach
from one end to the other, consequently there are many joinings which are always
objectionable, not only because of the time occupied in making them, but because
there are more chances of their coming loose and doing serious damage to the
machine.
By our invention such risks and dangers are lessened as the key or plain metal
strip employed to hold the trough teeth down, can be rolled of such lengths as will
pass over each "jumped joint" of he trough, by which means they are held firmly
in position without the necessity of revitting or flattening each end of the trough into
the groove, except at the two extremities.
Dated this 21st day of September 1886.

page_text: COMPLETE SPECIFICATION.
An Improved Means or Method of Fixing Double or Troughshaped
Saw-teeth to the Rollers Employed in Machinery for Opening
or Preparing Fibrous Substances.
We, EZRA SYKES, of the firm of John Sykes and Sons, of Huddersfield, Yorkshire,
Machine Makers, and ELI WILKINSON, of Marsden near Huddersfield, Waste
Opener, 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 has reference to means to be employed in making secure double or
trough shaped saw teeth in the rollers of opening and preparing machinery, and this
we accomplish by cutting or forming spiral or other grooves in or on the periphery
of such rollers, and afterwards inserting such trough shaped teeth into the said
grooves, but so arranged that the teeth stand above the surface of the rollers.
order to fasten the teeth into the said grooves we insert and "mill" into the trough
a key or plain narrow band of metal which forces the sides of the trough against the
sides of the grooves.
In
In order that our invention may be more fully understood we berein give reference
to the accompanying sheet of drawings illustrative thereof, where Fig. 1 is horizontal
section of a roller provided with troughshaped serrated teeth, fixed to such roller
according to our invention; Fig. 2 is cross section of such roller taken through the
line a b in Fig. 1. A portion of a roller is shewn at c which has spiral grooves d
cut in the periphery of such roller, into which grooves we insert the trough shaped
saw teeth e, the point of the teeth of one side of the trough being cut so as to come
opposite a space in the other side of the said trough for the purpose of more equally
distributing the points of the teeth. For the purpose of fastening the trough within
the grooves cut in the roller we "mill" or force into the trough a key or plain narrow
strip of metal f which holds the said trough firmly in the grooves, the meeting ends
of such narrow strip being afterwards made secure by riveting or other suitable
means.
It will be understood by persons conversant with the trade that in covering rollers
of large diameter with these compound or trough shaped saw teeth, that many lengths
will be required to cover a single roller from end to end, as the troughs cannot con-
veniently be made long enough to reach from one end of the spiral groove to the
other end of large rollers, consequently there will be several joinings of the trough,
which are always objectionable, not only because of the time occupied in making the
joinings, but because there are more chances of such joints coming loose and doing
damage to the machine, but by holding the troughs down in position by means of the
key or plain metal strip which can be rolled of such lengths as will pass over
each "jumped joint" of the troughs, the serrated troughs are held firmly in position
without the necessity of riveting or flattening each end of the trough within the
groove except at the two extremities.

page_text: When very fine grooves are cut in the periphery of the roller and the trough
shaped saw teeth placed closely to each other when operating upon fine fibre, the
edges of the grooves cut in the metal roller (which is cast metal) are frequently
snipped, when milling the teeth within the grooves made in the cast metal roller.
To prevent this we use a wrought iron or steel strip i; see Fig. 3, which is horizontal
section of part of a roller, and Fig. 4 cross section thereof taken through the line g—h
in Fig. 3. It will be seen that the metal strip i is deep enough to stand up prominent
above the periphery of the roller c thereby forming between each strip i another
groove having now wrought iron or steel sides and into these grooves we insert the
trough shaped saw teeth e, such saw teeth e being held down by the strip f as previously
explained.
с
By this means the trough shaped saw teeth can be placed very closely together, and
the wrought iron or steel grooves do not get suipped or broken when milling in the
trough shaped saw teeth, as is sometimes the case when they are milled into cast iron
grooves.
The trough shaped saw teeth herein mentioned are made from a flat piece of steel,
the serrated edges first being cut, when the flat strip is drawn through grooved rollers,
or they may be folded by other well known mechanical means.
Having now 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 :
Firstly. The means or method of fastening trough shaped saw teeth (within grooves
formed in the periphery of rollers) by means of a key or plain narrow strip sub-
stantially as described in the Specification and shewn in Figs. 1 and 2 of the
accompanying drawings.
Secondly. In combination with the grooved roller c of narrow strips of wrought
iron or steel i, arranged to form another groove in which to receive trough shaped
saw teeth e made secure by means of a key f, all substantially as described and
shewn in Figs. 3 and 4.
Dated this 17th day of June A.D. 1887.
TASKER & CROSSLEY,
Halifax, Agents.