IMPROVEMENTS IN MACHINERY AND APPARATUS APPLICABLE TO ROTARY FRAMES EMPLOYED IN The ManufacTURE OF LOOPED FABRICS
Year: 1879

page_text: PROVISIONAL SPECIFICATION left by Fredrick Keywood at the Office of
the Commissioners of Patents on the 3rd July 1879.
FREDRICK KEYWOOD, of the Town and County of the Town of Nottingham.
"IMPROVEMENTS IN MACHINERY AND APPARATUS APPLICABLE TO ROTARY FRAMES
EMPLOYED IN The ManufacTURE OF LOOPED FABRICS."
I employ several modifications of machinery and apparatus, each of which are
applicable to rotary frames having fixed or moveable needle bars. But for the sake
of illustration, I have described each as applied to what are known as Cotton's
rotary hose frames. In the first modification I employ a trick bar or bars, each of
which slide in a groove cut in the front of the horizontal sinker bar; below the
sinkers the sliding to the right and left is effected by a rocking lever operated by a
cam or pattern wheel; besides the sliding motion each bar has a rocking motion
communicated to it by a connecting link operated by a cam or pattern wheel; the
clawkers or drivers of each pattern wheel are arranged so that each wheel is capable
of being racked one or more notches at each course, according to the pattern
required, in addition to the horizontal and vertical movements of the bar or bars;
each is capable of being lowered out of the way of the needles and needle bar when
not required; each trick bar is cut away to the guage of the needles as required,
the portions not cut away are grooved at the front to receive the stem of the
vertical needle opposite to it, the needle when drawn down is held by the grooved
portion clear of the presser, thus causing the loop to remain on each needle.
In the second modification, I either cut a comb in the front lower part of the
jack bar or attach combs thereto; these combs carry jack wires on which jack bits
are hinged; on each bit there is a projection on the edge furthest from the needles;
the height of these projections vary vertically; each jark bit lies between the knock-
over bits; on the jack bar of the frame I secure a requisite number of bearings in
each of which a rod slides vertically, these rods carry one or more horizontal bars,
each of which in turn press upon the projection on one or other of the jack bits
before named, the bar or bars are raised or lowered by a cam or pattern wheel and
suitable connections, the needle opposite the jack bit operated by the horizontal bar
or bars is held clear of the presser bar and retains the loop.
In the third modification I securo a trick bar on the top of the knock over bit
leads; the trick bar is interchangeable according to the pattern required, each 'bar
being cut the same as the trick bars described in the first modification; the trick
bars carry bits each of which press a needle towards the presser so as to throw off

page_text: the loop when a tuck is not required; the trick bar has rising and falling
movements to lift the bits from between the knock over bits, and when traversed,
lower them between other knock over bits; the trick bar has a horizontal sliding
movement to and from the needles, such movements being effected by suitable
connecting levers operated by a pattern wheel and cam.
In the fourth modification instead of casting the knock over bits in leads, I place
each bit in a comb in which it slides to and fro; there is a projection on each bit;
such projection may be placed so as to be on the beard side of the needlo or on the
opposite side; when placed on the beard side of the needle, the needle will be pulled
clear of the presser and the loop will remain on the needle; if on the other side of
the needle, the needle will be pressed to the presser when and where a tuck is not
required; the outer ends of the knock over bits are of divers heights, and are
operated upon by a rising and falling bar or bars actuated as described in the
second modification in conjunction with an additional cam and connections.
In the fifth modification instead of casting the needles in leads I form the needles
somewhat longer than usual and flatten the stem, and hinge each needlo on a wire
carried by a comb, and operate each needle by a trick bar as before described. In
the sixth modification I secure each neodle in a bit which rises and falls vertically
in a comb, each bit carrying a projection operated upon by a rising and falling bar
or bars as before described; the needles which are raised retain the loop.