US73993A - Improved let-off and take-up foe looms - Google Patents

Description

J. PENDER. LET-OPF AND TAKE-UP POR Looms.

No.y 73,993. Patsnted Peb. 4, 1868k lo a l z d v Q V, :1w I QJ V l Z I d.: g fi 'I 'l s s, e @with tartes gnent @time Letters Patent No. 73,599.3, dated February 4,1865.

IMPROVED LET-OFP AND TAKE-UP FOR LOOMS.

alle Santilli nitrite: tu in tten Entert zitmt mit mating ynttf tige-tame.

TO-ALL WHOM IT MAY CONGERN:

Beit known thatI, JOHN FENDER, of Worcester, in the county of'Worcester, and'State of Massachusetts, have invented a'n Improved Let-Off and Take-Up Motion for Looms; and I dohereby declare that the following, taken in connection with the drawings which accompany and form part of this specification, is a description ofmy invention suiicientito enable those skilled in the art to practise it.

The invention relates to the construction and arrangement ,of let-off and take-up mechanism for looms, v the improvement consisting primarily in an arrangement ofv mechanism by which the warp-roll and cloth-roll are actuated by a friction-feed mechanism. j

The drawings represent a loom or loom-frame, with my invention embodied therewith. A shows'a plan, and B a side elevation of the same.

a denotes the frame; b, the yarn-beam; e, the cloth-beam, all arranged in or substantially in the usual manner. At each end ofthe fr'ame'is a Wheel, d, xed on' a shaft, e, turning in bearings in the frame a, each wheel having a peripheral iiange or ring,f, against the smooth inner surface of which a friction-pawl or brake, g, is held, said pawl being hung by a'pin, h, to ono arm of a lever, z', which lever is* hung on a fulcrum-pin, 1:, projecting from a rocker-arm orsegment, I, turningloosely 'on the shaft e. The outer peripheral face oflhis arm is eccentric to the ring f, and the pawl gis made wedging in shape, as shownl at P, and when any Inovement is imparted to the pawl in the direction of the arrowshown thereon, the pawl is cramped between the outer faee of the arm l and the-inner surface of the ring, causing the wheel d to rotate with the pawl. llove-Y ment ofthe pawl in the opposite direction loosens the hold of its outer surface upon the ring f, ,and allows the pawl to slip loosely along the wheel, back movement of the wheel being prevented by any suitable stop-mechanism, The pawl is held normally in this position, or loosely between the ringf and the arm Z, by a suitable spring, m, or by a weight, n. The upper arm o`of the lever i is held normally (by this action of the spring or weight) against a stop screw, y, or the upper arm of the lever may be connected to a screw-pin, g, by a oord, r, and the extent of rear movement of each lever is regulated by adjustment of such screw or screw-pin, as will be readily understood. On a shaft, s, are cranks-having hung to them long pawls, u, the opposite end of cach ot'iwhich is supported loosely on an. arm, v, projecting from aA shaft, w, hung in bearings on the frame a. A vertical arm, w, depends from the shaft 10,'and the weight of.the pawl u, resting upon the arm v, holds their arm :v up against the yarn upon the yarn-beam, or the cloth upon the cloth-roll'. i

Each rotation of the shaft s and cranks't effects a reciprocating movement of each pawl u, and as the tooth4 of the let-oil pawlrin moving outwardly, or of the take-up pawl in moving inwardly, comes into Contact with theta/rm 0 of the levers', it impels said level', and thereby e-iects a movement of the wheel d through the friction-pawl g, and as the shaft of each wheel d carries, at its inner. end, a pinion, y, meshing into a gear, z, on the yarn or oloth-beam,`such intermittent movement of the wheels effects the delivery or let-off ct' the yarn, andb the corresponding wind-up or takefup of the cloth, this lot-oil" and take-up being eilected at each boating-up of the lay, as is well understood.v When the yarn-beam is full, the surface of the yarn tips the arms a: v as shown by red lines, this' carrying 'the pawl up to the position shown by the-red lines at B. The 'screwp is then adjusted, so that the movement of the pawl' against thclevcr will effect a suieient rotative move ment of the yarn-beam toilet oft' the required amount of yarn. As the yarn is taken from. the beam, and the diameter of the beam thereby lessens, the arms :t and i1 fall, and the pawl u is thereby gradually lower-ed, and brought into position for effecting a gradually-increasing extent of movement of the lever i and of the yarn-beam, thus insuring' a uniform delivery of yarn from a full to an empty beam. By n similararrangement, Athe take-up is keptuniform from an empty to a full cloth-beam, the arm 'v being elevated as the diameter of the beam increases, thereby effecting a gradually-lessening throw of the take-up lever-1.', the throw of the lever being adjusted when the cloth-beam is empty, or at any other time, so that the take-up shall correspond 'with the let-olf."

The employment of the frictionv-pawl mechanism, in contradistinction to a ra-tchet-and-pawl mechanism,- effects this perfectly uniform delivery of the yarn from the full to the empty beam, and a correspondingly unitorm take-up of the cloth from the empty to 'the full beam, whereas, by the mechanism usually employed,

there is an nnavoable irregulalrity in the tension or strain uponthe yarn' us each pawl works from one to the next tooth of the ratchet. The rociprooa'ting movement of the pawls u may be 'eectertby cms or other.

mechanism, though I prefer the employment ofthe crnnks,` substantially as shown.

I do not 'claim the donstruction of the frietion-feed, for this is not 'my invention, which relates rather to the method of combining'or arranging s u'eh feed with the mechanism for actuating the same, and fdr` producing th graduating movements of. the yarn and cloth-beams.

I claim, in combination with the ya'rn and cloth-beams, or either of them, and with the mechanism -by ivhch the intermittent rotative movement of the yarn or cloth-beam is directly produced, the lev'er or levers z', pawl or pawls u, and arm or arms v arranged to operate substantially es set forth. A l

v JOHN PENDER.

Witnesses:'

FRANCIS Gouw, L. H. LATIMER.

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