Improvements in or relating to Jacquard Mechanism for Embroidery Apparatus.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in or relating to Jacquard Mechanism for Embroidery
Apparatus.
ROBERT SCOTT, Draughtsman, 37, Birrell Road, Sherwood Rise, Nottingham,
do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in mechanisam for automatically moving
embroidery apparatus each stitch in any direction required.
In carrying out this invention there are two arms for moving the embroidery
apparatus horizontally, and vertically, one of the arms having near one end of
it a number of teeth on each side of it near the other end there is a slot cut in
it at such an angle that as it is moved right or left it moves a stud that is placed
in the slot up or down which gives the vertical, movement to the embroidery
apparatus.
The other arm has, also a number of teeth on each side of it near one end, and
at the other end it has teeth on one side only and they fit in the teeth of a cog
wheel on the axle of the cog wheel there is another wheel to reduce the length
of stitch as required. This arm gives the horizontal movement.
Each of these arms are operated on by two independent, slides, near one end
of each slide there is a number of teeth placed so that they can engage with the
teeth on one of the arms, near the other end of each slide are two studs sufficient
distance apart to allow a lever to pass up and down between them, a distance
from one end of each slide there is an hinge from the hinge to the end of the
slide that has teeth upon it they can be moved in and out. Each slide is kept
out of gear when not required with a spring.
The slides are preferably carried in bearings suitable for them being moved
horizontally.
For each horizontal slide there is a lever axled at one end, its other end passes
through a vertical slide that can be moved up or down by the lever, near that
end of the lever that passes through the vertical slide there are fixed upon it a
number of rods reaching from it to the grid of the jacquard. At the grid end
of each rod is an adjustable, stud also a needle from it that passes through a
loop in a cross needle of the jacquard. The cross needles push off the grid all
the studs except those selected by the cards. Each rod on the lever is arranged
to give a different height to the lever.-Between the rods on the lever and its
axle there is fixed upon it a projection which as the lever rises or falls, puts the
teeth on the horizontal slide in or out of gear with those, on one of the sides of
the arms that move the embroidery apparatus.
To the top of each vertical, slide there is axled a lever which passes between
the studs on one of the horizontal slides. Each of these levers is connected above
the studs on the horizontal slides by a link to a slide moved by a cam, or eccen-
tric on a transverse shaft.
Two of the cams, on the transverse shaft always move their slides to the right

page_text: the other two camms always move their slides to the left when they move for the
stitch.
When the lever carrying the rods is caused by the jacquard to rise or fall the
lever axled on the top of the vertical, slide will rise or fall also. When this
lever which passes between the studs on the horizontal slide and is connected by
a link to the cam, slide, is moved right or left by the cam, it will move the hori-
zontal slide more or less as the lever is higher or lower between the studs on the
horizontal slides and so give any length of stitch required.
COMPLETE SPECIFICATION.
Improvements in or relating to Jacquard Mechanism for Embroidery
Apparatus.
I, ROBERT SCOTT, Draughtsman, 37, Birrell Road, Sherwood Rise, Nottingham,
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:―
The object of this invention is to apply jacquard mechanism to give the to
and fro and up and down motion to an embroidery frame.
Figures 1 and 2 are front elevations of the right and left hand portions of the
machine, Figure 2 being to half the scale of Figure 1. Figure 3 is a horizontal
section on the lines 3-3 Figures 1 and 2. Figure 4 is a vertical section on the
line 44 Figures 1 and 3. In these figures the greater part of the framing is
omitted for the sake of simplicity.
a is the embroidery frame which has fixed to it rails a¹ free to run on grooved
pulleys 6 carried by levers b pivotted at 62. The other ends of the levers bare
pivotted to a counter-balance weight c. is a rod fixed to the weight c and
carrying grooved rollers c³ running on the diagonal bar d' of the frame d which
is free to be moved horizontally to and fro in fixed bearings by the bar A to
which motion is given as hereinafter described.
If the bar A and frame d is pushed to the right, the weight c is raised and the
frame a is lowered whereas if the bar A is pulled to the left the frame a is raised.
The to and fro horizontal movement is given to the frame a by the bar B whose
end carries a rack gearing with the toothed wheel e fixed to the shaft e¹ on which
is a feather e, f is a pinion gearing with a rack a fixed on the frame a and
free to slide on the shaft e¹ but turning with it being grooved to fit the feather e³.
As the bar B moves to and fro therefore the frame a moves with it but to a
diminished extent.
Motion is given to the bars A and B in the following manner: -g is a shaft
revolving once for every stitch and having fixed to it four equal and similar
cams g¹ g³ 93 g. The cams g¹ g3 and 9 g respectively are similarly placed on
the shaft. These cams act on rollers h¹ h¹ on four slides h to which they give a
to and fro motion. The slides h have pivotted to them connecting rods h² whose
other ends are pivotted to links the latter being also pivotted at 1
to lever which are pivotted at k¹. C is ૧ bar free to move
longitudinally in bearings. The link passes through a hole in the
bar C between two knife edges C¹ fixed to it. Each lever k is acted on by a
multiple lift jacquard of ordinary construction. 7 is a grid which reciprocates
up and down and through the same distance every stitch. is a frame connected

page_text: by the rod to the lever k. 13 are vertical needles pivotted to the top bar of the
frame and pulled to one side or left in the path of the grid by the jacquard
cards in the ordinary way.
As the grid rises the frame remains stationary unless and until the grid
comes against one or other of the needles 13 which has not been pulled aside by
the jacquard and the frame is then lifted by the grid during the remainder of
the stroke of the latter so raising the lever k and link j more or less according
to which of the needles is engaging with the grid. The link j is oscillated
about its pivot j¹ by the rod h³ causing the rod C to move to and fro the extent
of its reciprocations depending on the height to which the pivot has been
raised. The jacquard cards are so punched that only one at the most of the
levers is raised at any time as shown at Figure 4.
The bars C have teeth or racks C2 at one side of their ends and the bars A
and B have similar teeth or racks A B¹ on both sides. Normally the teeth on
the bars C do not engage with those on the bars A and B but when one of the
levers is raised by the jacquard as above described the recess in the plate k
is lifted above the bar C³ (carried by the bar C) so that the side of the plate
is now in contact with the ball as shown at Figure 4. 95 are projections on the
side of the cam discs g¹ gå g³ g¹ and as the cams revolve these projections acting
on any of the plates which are raised press them sideways against the bars C
putting the teeth of the latter into gear with the teeth on the bar A or B as the
case may be causing this bar to move with the bar C and thus giving the required
vertical or horizontal movements to the embroidery frame.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. Actuating the frame by two parallel bars one fixed or connected by gearing
to it and the other carrying an inclined guide in which works a part fixed or
connected to it.
2. Supporting and actuating the frame substantially as described and shown
at Figure 2 of the drawings.
3. Actuating each of the two bars referred to in Claim 1 by a pair of bars
reciprocating in opposite directions through variable distances determined by
the pattern mechanism each bar of the pair being capable of being temporarily
connected to the first mentioned bar.
4. Having teeth on both sides of the bars of the first pair and on one side of
the bars of the other pairs and causing the latter bars to engage with the former
by pressing them sideways.
5. Actuating each of the bars of the two pairs forming the subject matter of
Claim 2 by a link passing through jaws in it and having one end pivotted to a
bar reciprocating through a constant distance and the other end to a pivot which
is raised and lowered by the pattern mechanism.
6. The method of reciprocating the bars through variable distances substan-
tially as described and shown in the drawings.
7. Apparatus for working an embroidery frame substantially as described and
shewn in the drawings.
Dated thio 5th dor of April 1898