Improvements in Picker and Beat-up Motions for Looms.
Year: 1887

page_text: of Litchfield and State of Connecticut, United States of Americk, ManufacVUI CI • ]
Improvements in Picker and Beat-up Motions for Looms.
1, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings in the County of Middlesex (a communication from Jacob
Widmer, of New Hartford, in the county of Litchfield and state of Connecticut,
United States of America, Manufacturer) do hereby declare the nature of my invention
for "IMPROVEMENTS IN PICKER AND BEAT-UP MOTIONS FOR LOOMS," and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
Referring to the accompanying drawings:-
Figure 1 is a side view of part of a loom in elevation, those parts being omitted
which are not immediately connected with my improvement.
Figure 2 is a front view of the same with parts broken away in front of the plane
denoted by line --- of Fig. 1.
Figure 3 is a top view of the same.
Figure 4 is a plan view of the periphery of the cam wheels as developed.
Figures 5 and 6 are diagram views, in detail, of the top of the lathe beam
to illustrate the means for moving the shuttle along the shuttle race, and the operation
of the locking mechanism.
My invention relates to the class of positive motion looms, and it consists in
the novel construction of parts and their combination as will be hereinafter more
fully described and specially pointed out in the claim made hereto.
In the accompanying drawings the letter a denotes the main frame of a loom made
of any desirable material, as iron, cast to shape; the lathe beam borne on the
swinging frame 1, pivoted to the lower part of the frame a and swung to and fro

page_text: in a vertical plane upon the pivots 6 by means of the rod c and connected
mechanism.
This rod c is pivotally connected to the back of the lathe beam at one end and
is supported in the bearing c¹, fast to the frame at a point near the back of the frame,
and has a curved slot c³ in a widened part c², about mid-way of the rod; and into this
slot projects and works a pin, on the outer end of the crank d¹ fast to one end of the
main driving shaft d, which is held in suitable bearings in the frame, and is driven
by means of a belt passing over the pulley d², also fast to the shaft d.
Near the end of this shaft is secured the cog-wheel e in mesh with the cog-wheel e¹
which is fast to the rotary shaft f. This shaft bears near its center and fast to the
shaft a cog-wheel g in mesh with the cog-wheel g¹ that is secured to the rotary cam
shaft h, which bears the cam-wheels h¹, h², having each a peripheral cam groove h³, h.
These cam-wheels are elliptical in cross-section or contour, in order that during
the vibrations of the lathe by the movements of the reciprocating-rod c, the face of
the cams will follow the movements of the lathe and thus keep the pins 2, of
the levers in the cam grooves, notwithstanding the vibrations of the levers with the
lathe.
To the cross bar 63 of the lathe frame are pivoted, upon each side of the center, the
two levers, which move in a plane parallel to the lathe frame and bear pins
that project into and are held in the cam-grooves ³, h, respectively, as the lathe
swings.
These levers are pivotally connected at their upper ends by means of the connecting
rods k¹ with the shuttle slides 1, 1, that are reciprocated in a dovetailed groove 14
in the front of the lathe beam as the levers are swung back and forth by means of the
cam-wheel.
These slides have each on their outer end an upward projecting arm 12, 13 to which
is fastened a shuttle carrier m, m³, so held as to be moved back and forth along
the race on the top of the lathe beam.
Each slide arm bears also a spring latch n, n', having a hook n on its inner end
and so pivoted as to move in a plane at substantially right angles to the plane of
the lathe frame. Each latch has near its rear end, an offset n³, and this part is held
outward by means of a spring o arranged as shown in Figs. 5 and 6.
A slide bar p is supported in bearings p' below the lathe beam, and is reciprocated
by means of the eccentric f³, fast to the shaft f, and by means of the connected
intermediate mechanism consisting of the eccentric rod f, arm f³ which is fast to the
vertical rock-shaft f supported in bearings fast to the frame; arm
fast to the upper
end of the rock-shaft having a slot f into which projects a pin fast to the outer
end of the lever f, which is pivoted at its other end to the frame and bears
substantially along its whole length a slot into which projects and moves a pin p²
fast to the slide bar p. This slide bar p bears arms p³ which project outward,
upward and then laterally in the plane of movement of the latches, and bear the
projecting trip devices, g¹, which co-operate with the offset n³ on the latches
in effecting the transfer of the shuttle from one carrier to another.
The shuttle slides bear the shuttle locking mechanism and the slide bar bears the
unlocking mechanism of the loom.
The within described mechanism is so proportioned and combined that the
lathe beats up twice at each revolution of the cam wheels, each of which hears two
cams, by means of which, and the connected parts as described, the shuttle is fed
back and forth. This motion of the shuttle in bearing the filling in weaving is
performed while the lathe is swung back, as shown in Fig. 1, the shuttle being held
at either limit of its play while the lathe swings forward to beat up the filling.
A special advantage of my improvement consists in the manner in which the shuttle
is transferred from carriage to carriage without shock, and with a practical
continuance of the motion, although not in the carriage in which it first starts.
The method of effecting this is as follows: the shuttle beginning at the right hand
end of the lathe beam is moved forward along the race by means of the cam-groove h*,
the cam wheels turning in the direction of the overlying arrows.

page_text: At the same time the carrier m is moved forward from the left hand end of the
lathe by means of the cam-groove ³, the carriers moving towards each other for a time
at about the same rate of speed, but the cam-grooves are so formed in the wheels that
the pin projecting from the lever i reaches the highest point of the cam-groove h³ and
passing it starts the carriage m on its backward motion before the carriage m¹
has reached the forward limit of its play. The carriage m¹ now moves faster in its
forward motion than the carriage m does in its backward motion so that the shuttle s
is pushed into the carriage m.
1
During this movement of the shuttle and carriage the eccentric and its connected
mechanism have moved the slide bar so that the trip q moves forward in the same
direction as the carriage m³, but at a much less rate of speed; and this movement of
the trip q' continues until the forward end of the shuttle bears against the face of the
opposite carriage m, when the backward movement of the trip begins. As the
trips 9, are rigidly connected to the slide bar it follows that their movements
are the same in direction and extent, so that as the backward motion of the trip g¹
raises the latch n' the latch n is released and its hooked end catching into a socket s
in the side of the shuttle fastens the latter in the carriage m, which continues
its backward motion.
This begins as before described a short time before the shuttle has been placed
in it by the forward motion of the opposite carriage.
This opposite carriage m¹ is returned to the right hand end of the lathe, and
the shuttle borne by the carriage m to the opposite end of the lathe, thus carrying the
filling thread once through the shed.
While the crank pin moves from one extremity to the other of the slots c³ in the
rod the lathe remains at the backward limit of its play as seen in Fig. 1, and
it is during this "dwell" that the transfer of the shuttle from one end to the other of
the lathe is effected.
The rotation of the driving shaft now forces the rod c and the lathe & forward, and
beats up the filling, the pins on the levers i, i, being, during this time, in the part of
the
grooves
in the cam wheels by which no movement of the levers is produced. Now,
as the cam-wheels continue to revolve, the pins of the levers reach the limit of
the straight or dead-race of the cam-groove and are directed in to the cam-sections
of the grooves and the shuttle operating levers thus reciprocated. The form and
arrangement of the cam-grooves and the dead-race are shown developed in Fig. 4
of the drawings, wherein it will be seen that cam-grooves are arranged opposite
to each other in the cam-wheels, and that the reversing points of the groove of
one cam-wheel are arranged in advance of the other, by which arrangement the
return movement of one of the shuttled operating levers begin before the other shuttle
operating lever has reached its forward limit of stroke, and the shuttle is thus
transferred without shock. As shown in Fig. 4 the cam-grooves are of duplicate
construction, but disposed in reverse arrangement on the respective cam-wheels,
in order that the lever carrying the shuttle may effect its delivery and transfer
as heretofore described; the movements of the mechanism being identical except
in the respects that the shuttle operating levers reach their limit of stroke in alternate
precedence. A special advantage results from the above described method of moving
the rod c by a crank on the driving shaft, as the rod and therefore the lathe are
moved forward against the filling thread with a quicker motion and a gradually
increasing pressure in beating up the filling when the crank pin in the rotation of the
shaft and crank travels downward along the inner face of the slot c³ thus obviating
the shock which results from the blow when the ordinary crank and connecting rod
are used.
Having now particularly described and ascertained the nature of the said invention,
and in what manner the same is to be performed, as communicated to me by my
foreign correspondent, I declare that what I claim is :-
1. The combination with the driving-shaft d, mounted on the loom frame, the
shaft, the shaft h, said shafts bearing gear-wheels meshing in operative arrangement

page_text: and the lathe, and the reciprocating mechanism d¹ and c of the cam-wheels h¹ and h²,
mounted on the shaft h, and made of elliptical form in cross section, and provided
with cam-grooves h³, h, on opposite faces of the ellipse, the levers i, i, pivoted to the
cross-bar of the lathe, and provided with pins to set within and traverse the said
cam-grooves, the connecting rods k, k¹, the shuttle slides 1, 1, and the shuttle
carriers m, m2, substantially as described.
2. The combination with the lathe of a loom, the vibrating levers, and the shuttle
slides, arranged to be reciprocated by said levers, of the locking device consisting
of the spring-actuated latches n, n', with book n², and offset n³, and the unlocking
device, consisting of a har p, formed with an arm p³, having the trip catches 4, 9,
and means for reciprocating said bar, all substantially as described.
3. The combination with the lathe of a loom, and mechanism for vibrating it,
of cam-wheels formed with cam-grooves in their faces, one of said cam-grooves being
arranged with its reversing point in advance of the reversing point of the cam-groove
in the other cam-wheel, and shuttle operating levers pivoted to the lathe frame
and having pins arranged in said cam-grooves, whereby the return movement of one
of the shuttle operating levers shall begin before the other shuttle operating lever bas
reached its forward limit of the stroke, and the shuttle thus transferred without shock,
substantially as described.
Dated this 27th da..
1007