US770067A - Jumper or half-and-return loom-motion. - Google Patents

Description

No. 770,067. PATENTED SEPT. 13, 1904.

I WQ A. HILTON.

JUMPER OR HALF-AND-RETURN LOOM MOTION.

APPLICATION FILED SEPT. 25, 1902.

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JUMPER OR HALF-AND-RETURN LOOM MOTION.

APPLICATION FILED SEPT. 25, 1902.

PATENTED SEPT. 13, 1904.

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UNITED STATES Patented September 13, 1904.

PATENT OFFICE.

JUMPER OR HALF-AND-RETURN LOOIVl-IVIOTION.

SPECIFICATION forming part of Letters Patent No. 770,067, dated September 13, 1904. Application filed September 25,1902. Serial No. 124,827. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM A. HILTON, a citizen of the United States, residing atUtica, in the county of Oneida and State of New York, have invented certain new and useful Improvements in Jumper or Half-and-Return Loom-Motions, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to an improved attachment which is herein illustrated as seated on the dobby-head of a loom, whereby one or more of the harnesses may be operated, and is known as a jumper-motion or half-andreturn; and I do declare that the following is a full, clear, concise, and exact description thereof sufficient to enable one skilled in the art to make and use the same, reference being had to the accompanying drawings, in which like characters refer to like parts throughout.

In weaving certain fabrics, such as leno, it is necessary that certain of the warp-threads (appropriate to the design) shall be crossed from one to the other side of certain other warp-threads, the filling beinginserted by the shuttle when the warp-threads are in proper position to produce the design. In doing this work the different harnesses that carry the threads play up and down by certain wellknown means, being made thereby to change the relative horizontal position of the threads, and thus make what is termed shed or space wherein the shuttle travels to and fro, carrying the filling between upper and lower warps. To facilitate the weaving, it is sought to give certain harnesses a half-and-return motion, so that instead of taking a full motion from top to bottom, or vice versa, they take a half of the motion up or down and which is all that is necessary for the work and. then return at once in place for a second movement, and thus double the rate of work. Devices have been employed for that purpose on the harnesses of the upper half or that carry the whip-threads; but my device is shown as used on a harness that carries the standard thread,

although I do not, of course, restrict myself to such application, as the construction can be applied to any case.

illustrated and described herein, by which aharness-frame may be operated, as above stated, to accomplish its work without delaying the work or retarding the speed of other parts of the machine.

In the drawings, 1 is a loom-frame provided with the top bar 2, beneath which the harness 3 plays up and down, carrying the warpthreads by well-known means.

A represents an ordinary dobby-head seated on the loom-frame and in which is the oscillating lever B, attached to shaft 6 and having the opposite vertical arms 7) b, the same being duplicated on the other side of the dobbyhead, but not shown in the drawings. The oscillating lever is connected with the power of the machine by pitman-rod b". The vertical arms 6 b carry through proper link connections 44E knives or lifters 5 5, which travel in slots 5 5 in the (lobby-head. The lifters 5 5 by well-known means and according to the configuration of the design to be woven engage certain hooks 6 6, which are arranged in an upper series and a lower series. These hooks as they move forward draw the harness-levers 7 7 forward by the upper or by the lower blade, as the case may be. 8 8 are attached to the harness-levers and'to the harnesses, so that as the hooks 6 6 are operated to produce the intended design in the fabric, and which is done by well-known means not necessary to be shown here, the harnesses rise and fall, and thus dispose the warp-threads Straps to form the shed. Since the hooks 6 6 are arranged in an upper and in a lower series, each connected with the harness-levers 7 7 the latter move to and fro at a corresponding rate, and if one harness and its threads need to be passed but half-way up or down much is saved by a device that will cause that harness to move at twice the speed of the others.

0 represents frame-bars which are fixed to the outer ends of the arms a of the dobbyhead at top and bottom, one on each side. In these frame-bars I journal the shaft D, which I illustrate as projecting at one end and where 1 seat a sprocket-wheel E. At another place on the shaft D, I seat the cam F.

I illustrate one style of connecting means between the oscillating lever and the shaft D in the sprocket-wheel E and the sprocketchain Gr. The latter is attached to the arms 6 of the oscillating lever by slipping a link on each of the chain-hooks H, which are slotted at one end It and there adjustably supported by the hook-arms H, which are slotted at the outer end it and adjustably supported on the arms Z). The chain G is passed over the wheel E, the links of the former engaging the teeth of the latter, whereby the cam is oscillated. In this way I am able to adjust the connections to cause the harness thus actuated to move relatively to the other harnesses as may be desired. Other means of transmitting the oscillation of the lever B to the shaft D may be used, and I do not limit myself to this particular construction.

Above the shaft D, I journal on extensions of the frame-bars C a j umper-shaft I, on which and in vertical alinement with the cam F, I seat the jumper-arm J, which has a blade or suitably-formed surface j at one end for the cam to play against, and at the other end carries a head 1', to which is attached the harness-strap c, which is connected at its other end to harness 3. On the jumper-shaft I is seated a collar 71:, held by a set-screw, and a spring is is provided in connection with the frame or head and the collar, illustrating a means for reciprocating the jumper-arm J against the turning of the cam F.

In operation, the upper and lower arms 6 b of the oscillating lever swing to and fro, which, by means of the sprocket-chain, turns the cam from its up to its down position, or vice versa that is to say, when one arm 6 makes a complete traverse the cam has made a half-revolution, whereby, through the jumperarm and its connections, the connected harness is caused to pass up and down a half and return. The jumper-arm may be connected to such harness as may be desired, according to the thread that is to be given the double or accelerated motion. The harnesses that are connected to the harness-levers 7 rise and fall in a regular order, according to the scheme of the pattern and as controlled by the pattern-chain, as is well understood in the art. Each thread of the warp thus appears in regular order in its place in the pattern. It is desired, however, that a certain thread or threads shall be given a peculiar position, being crossed over other warp-threads after the shuttle has passed in one direction and before it passes in the other direction. The harness which carries the crossing thread must move quicker than the other harnesses in order to accomplish this. Instead of going with the other harnesses to the limit of the stroke it is governed by the jumper-arm. The means by which the crossing is effected are well known in the art.

The harness-levers 7 operate with the oscillating lever B. The connection of the arms 6 b with the sprocket-wheel and the connection of the latter with the jumper-arm and the particular harness accelerates the motion of the latter, as above shown and described. My device does not interfere with the usual connection of the harness to the harness-levers or the usual operation of the former when not actuated by the jumper-arm.

My invention is illustrated as applied to an open-shed loom; but it is evident that it has a variety of applications and that different forms and arrangements of construction may be employed without departing from the spirit and scope of my invention. I do not, therefore, limit myself to the particulars illustrated in the one application of my device shown in the drawings.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a loom, an oscillating lever, a jumperarm operatively connected with a harness of the loom, a cam controlling the movement of the jumper-arm in one direction, means for operating the cam from the oscillating lever, and means for moving the jumper-arm in the opposite direction.

2. In a loom, an oscillating lever, ajumperarm connected to the loom-harness, means operative by the oscillating lever for moving the jumper-arm in one direction, and means for automatically moving the jumper-arm in the opposite direction.

3. In a loom, an oscillating lever, a jumperarm connected to the loom-harness, means operative by the oscillating lever for moving the jumper-arm in one direction, and a spring for automatically moving the jumper-arm in the opposite direction.

4. In a loom, a jumper-arm operatively connected with a harness, a shaft mounted in the dobby-head, a cam fixed on said shaft and arranged in operative relation to the jumperarm, an oscillating lever operating the remaining harness of the loom, a flexible connection between the lever and cam-shaft to operate the cam, and aspring operating on the jumperi head transmits double motion to the harness,

arm in opposition to the cam. substantially as described. IO 5. In a loom, a reciprocating head, a shaft, In testimony whereof I afiix my signature in a sprocket-Wheel, a sprocket-chain connecting presence of two Witnesses. the head and Wheel, a cam mounted on the WILLIAM A. HILTON. shaft, and a jumper-arm pivoted in operative Witnesses: I contact with the cam and connected with a har- G. ELLIS,

ness of the loom, whereby the motion of the g E. T. DE GIORGI.

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