Improvements in Double Straight Bed Knitting Machines.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Double Straight Bed Knitting Machines.
We HEINRICH STOLL and FRIEDRICH MAERCKLIN, both of Reutlingen in the
Empire of Germany, Manufacturers, do hereby declare the nature of this invention
to be as follows:-
-
This invention relates to double straight-bed knitting machines and more
especially to the improved knitting machine described in the Specification of
Letters Patent No. 12828 of 1893.
When knitting upon one side of the machine only, and the central part or apex
of the lifting cam is raised, there remains a space in which the heels of the needle
jacks or hooks have too much play so that when the machine is driven at a high
speed the hooks tend to lift and fail at times to draw back the needles on their
return stroke.
To avoid this inconvenience the said part of the cam is now made to be revolved
about an axis perpendicular to the plane of the cam and it is made so that the one
half is unsymmetrical with the other half in order that when it is turned through an
angle of 180° (one hundred and eighty degrees) it may present a surface of
a different contour against which the heels of the jacks or needle hooks ride.
A turn button is fitted to the shaft or pin by which this cam or part may be
turned and this turn button may have a lateral pin to engage in one of two
diametrically opposite recesses according to the position occupied by the turn
button and cam. The button, pin and can are made so that they can be lifted
away from the needle bed to permit the former to be turned, and a spring between
the cam and the cover plate tends to hold the cam down upon the neelle bed and
consequently the lateral pin in engagement with the one or other of the two
recesses provided for its reception.
Dated this 19th day of February 1895.
HERBERT HADDAN & Co.,
Agents to Applicants.
Improvements in Double Straight Bed Knitting. Machines.
We, HEINRICH STOLL and FRIEDRICH MAERCKLIN, both of Reutlingen in the
Empire of Germany, Manufacturers, 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 double straight bed knitting machines and more
especially to the improved knitting machine described in the Specification of
Letters Patent No. 12828 of 1893.
When knitting upon one side of the machine only, and the central part or apex
of the lifting cam is raised, there remains a space in which the heels of the needle
jacks or hooks have too much play so that when the machine is driven at a high
ID Ri

page_text: speed the hooks tend to lift and 'fail; at times to draw back the needles on their
return stroke.
To avoid this inconvenience the said part of the cam is now made to be revolved
about an axis perpendicular to the plane of the cam and it is made so that one half
is unsymmetrical with the other half in order that when it is turned through an
angle of 180 degrees (one hundred and eighty degrees) it may present a surface
of a different contour against which the heels of the jacks or needle hooks ride.
A turn-button is fitted to the shaft or pin by which this cam or part may be
turned and this turn-button may have a lateral pin to engage in one of two
diametrically opposite recesses according to the position occupied by the turn-
button and cam. The button, pin and cam are made so that they can be lifted
away from the needle bed to permit the former to be turned, and a spring between
the cam and the cover plate tends to hold the cam down upon the needle-bed and
consequently the lateral pin in engagement with the one or other of the two
recesses provided for its reception.
This device is illustrated in the annexed drawing.
Fig. 1 represents the cam slide from below;
Fig. 2 is a cross section through the machine;
Fig. 3 is a detail view.
The portions n of the central lifting cams are formed eccentrically and rotatably
arranged in the parts of the slide or carriage, and are lifted by means of the
button s. Said button is provided with a downward projection t which engages
and rests in either of the two recesses t1, t2 of the carriage. When the change in
the style of knitting is to be effected, the button is drawn upward and turned
about an angle of 180 degrees and again released when the projection of the button
will, owing to the action of the spring u, fall into the other recess t.
Figs. 1 and 2 show on the right hand the position occupied for knitting left and
left fabric where the jacks with the needles are, by means of the central cams, fully
displaced on the left hand side the central cam is shown shortened owing to turn
of the cam n, so that the jacks with the needles are not completely pushed forward
whereby one sided knitting is effected.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what wo
claim is : :―
A modification of the flat knitting machine for left and left fabric, represented
in the Specification of Letters Patent No. 12828 of 1893, cousisting in the inner
central cam portions n being formed of eccentrically placed parts fixable in two
positions resulting respectively in a more or less extensive forward movement of the
jacks for the purpose described.
HERBERT HADDAN & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to the Applicants.