IMPROVEMENTS IN declare the nature of the said Invention for KNITTING MACHINERY
Year: 1875

page_text: PROVISIONAL SPECIFICATION left by Samuel Frith at the Office
of the Commissioners of Patents, with his Petition, on the 26th
July 1875.
I, SAMUEL FRITH, of Leicester, Framework Knitter, do hereby
"IMPROVEMENTS IN
declare the nature of the said Invention for
KNITTING MACHINERY," to be as follows.-
The Invention relates to improvements in machinery or apparatus for
knitting, whereby great simplicity and efficiency are obtained, an
improved quality of work is produced, facility is afforded for narrowing
the work as required, and a self-acting stopping arrangement is
obtained.
The Invention applies mainly to that description of machine in which
a combination of needles, hooks, Jacks, sinkers, and presser is employed,
but parts thereof are also applicable to other arrangements of machinery
or apparatus for knitting, and the Invention consists,―
For this
Firstly, in a new arrangement of parts for getting the loops
purpose I employ as heretofore a set of lead sinkers, intermediate of

page_text: сс
which I employ other sinkers, which instead of being operated by
jacks," as in the mode heretofore adopted, are, according to my
Invention, mounted in guides, and are formed with projections to be
acted upon in succession by a "slur cock" pivotted to its bar, so as to
enable it at each end of its traverse to be turned over by a projection
therefrom, coming against the frame or a projection carried thereby, in
order that a suitable inclined surface may be provided to act on the
sinkers. Each of these last-mentioned sinkers is acted upon by a spring
to depress it after it,has been acted upon by the "slur cock," and the
thread has passed under it
1
The Invention also consists in an improved method of-mounting and
operating the hooks or knocking-over bits. For this purpose, instead of
causing the hook or knocking-over bar to work simply in an arc of a
circle as heretofore, they are according to my Invention carried by arms
pin-jointed at their lower ends to other arms, which at their rear ends
are fixed to a bar which is capable of rocking on fixed-contres or axes of
motion The hook or knocking-over bar is caused to rise and fall, and
to move backwards and forwards by means of cams acting upon levers
suitably connected thereto, and the action of the hooks is as follows
After the loops have been sunk between the needles, and the bar sinkers
have divided the loops, the needles begin to recede and the presser comes
into action, the hooks are then caused to come forward, so as to land
the loops over the barbs of the needles, and the needles continue to
recede, and the hooks or knocking-over bits to come forward to knock
the loops over, the hooks then recede a short distance, and are again
caused to come forward, so as to perfect the knocking over, after which
they descend and recede so as to carry the work back on to the stems of
the needles The presser consists of a solid bar mounted in vertical
guides so as to work at the back of the sinkers, and it is operated by
means of a cam acting thereon by suitable connections.
The Invention also consists in an improved arrangement of parts for
simultaneously "iacking" the narrowing apparatus, and adjusting the
traverse of the thread carriers. For this purpose the traverse of the
thread carriers in narrowing is effected in the following manner :-On
the bar carrying the guides for the carrier bar is mounted a lever which
is capable of working on an axis of motion at its centre. To each end
of this lever is pin-jointed a clawker or driver, which clawkers or drivers
are capable of acting upon rack bars to move them sunultaneously, the

page_text: one in the one direction and the other in the other direction. These
rack bars carry stops to regulate the amount of traverse of the carrier
bar and carriers. The lever actuating the clawkers or drivers is operated
by means of a lever fixed on the axis thereof, and receiving motion at the
times desired from a lever actuated by a cam Each of the carrier rack
bars has fixed thereto an arm or projection, the lower end of which is in
position to act upon one of the rack bars of the narrowing apparatus, by
which means as the traverse of the carriers is regulated the rack bars of
the narrowing apparatus are simultaneously operated to adjust the points
for narrowing
The clawkers or drivers of the carrier rack bars are
capable of being removed from their racks by means of a lever or other-
wise acting thereon, in order to permit of the rack bars being carried
back to their starting points by springs acting thercon
The Invention also consists in an improved self-acting method of
stopping the machinery or apparatus when a given length of material
has been made For this purpose I attach to the material being knitted
a weight which, when a given length of matcual has been made, comes
upon a lever which it releases from a stop or catch when the lever is
acted upon by a spring to shift it, and thereby shift the driving strap on
to the loose pulley, or in cases where the machinery is driven by gearing
to take the driving wheel out of action.
In circular knitting frames one end of a chain or other non-clastic
means is connected to the work, which chain is thence carried up over a
pulley, and has fixed to its other end a weight which acts on a lever, as
above described.