US781680A - Picker-stick motion for looms. - Google Patents

Description

No. 781,680. PATENTBD FEB. 7, 1905. G. F. ROPER.

PIGKER STICK MOTION FOR LOOMS.

APPLICATION FILED SEPT. 28,1904.

UNTTED STATES Patented February 7, 1905.

PATENT GEE-ICE.

CHARLES F. ROPER, OF HOPEDALE, MASSACHUSHF"S, ASSIGNOR 'IO DRAPER COMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORA- TION OF MAINE.

PlCKER-STICK MOTION FOR LOOMS.

SPECIFIGATIONforming part of Letters Patent No. 781,680, dated February 7, 1905.

Application flied September 28, 1904. Serial No. 226,272.

'1' r(.// [If/LOIJL it may concern.-

Be it known that I, CHARLES F. Roman, a citizen of the United States. and a resident of Hopedale, county of \Vorcester, State of Massachusetts, have invented an Improvement in Picker-Stick Motions for Looms, of which the following description, in connection with the accompanying drawings, is a specification,

like characters on the drawings representing like parts.

This invention relates more particularly to that portion of the picker-stick motion of a loom often termed the parallel motion, meaning thereby the mechanism which %auses the picker to move in a path substantially parallel to the raceway of the lay.

My present invention has for its object the construction of a parallel motion comprehending certain novel features of construction and arrangement whereby the rocking shoe, to which the lower end of the picker-stick is secured, is prevented from lifting at each end of the stroke of the stick and given a bodily longitudinal movement as it rocks.

The various novel features of my invention will be fully described in the following specilication and particularly pointed out in the appended claims.

Figure I is a front elevation of the righthand side of a loom provided with a pickerstick motion embodying one form of my invention with the picker-stick at the outer end of its stroke. Fig. 2 is an inner side elevation of the parallel motion shown in Fig. 1 looking toward the right. Fig. 3 is a transverse sectional detail on the line 3 3, Fig. 1, looking toward the right. Fig. 4: is an outline or diagrammatic view of the shoe and the bearing-line of the support when the pickerstick is substantially at mid-stroke, and Fig.

is a similar view taken when the pickerstick is at the end of its inward stroke.

The picker-stick P, movable in the usual slot in the lay A, the picker P the movement of which is to be made substantially parallel to the raceway of the lay, and the lug-strap L, connecting the stick with the pick-motion, (partly shown at P, Fig. 1,) may be and are all of substantially well-known and usual construction and operate in a manner familiar to those skilled in the art. A shoe is attached to the lower end of the picker-stick to rock on a stand or support mounted on thelay rockershaft A, Fig. 1, the shoe and its support embodying various novel features now to be described. The support comprises an elongated body portion I, having a hub 2 to receive and be secured upon the end of the rocker-shaft, said support having a long straight troughlike seat, inclined side walls 3 thereof giving a V shape to the seat in cross-section, as shown in Figs. 2 and 3. In Figs. A and 5 and in Fig. 1 the bottom line or intersection of the side walls isindicated by the straightline 3 Upturned parallel cars A are formed on the support extendingwellabove thetrough-likebearing-surface, saidears having upwardly and outwardly inclined slots 5 formed therein for a purpose to be described, said slots having circularlycurved ends and shortstraight sides, as herein illustrated. The shoe is adapted to rock on the support between the earsA and herein the shoe 6, rigidly clamped to the lower end of the picker-stick by a bolt 7 and nuts 8 and provided with an adjusting-screw 9, Fig. I, has its lower portion shaped to present a longitudinallycurved convex sole L0, the latter being V-shaped or wedge-like in crosssection, (see Figs. 2 and 3,) to cooperate with the seat-walls 3. Referring to Figs. 1, I, and 5, it will be seen that as the shoe rocks upon the support the rising or falling movement of the picker will be compensated by the longitudinal curvature of the sole 10 of the shoe, so that the picker will move in a substantially straight line or path. The bevelsided seat cooperates with the V shape of the sole to prevent any relative lateral movement of the shoe and support, so that there can be no twisting of the shoe or picker-stick during the movement thereof, the cars A assisting to prevent such lateral movement of the shoe. At the ends of the stroke there is a tendency of the shoe to lift from the support, such lifting being transmitted through the stick to the picker with objectionable reto that shown in Fig. 5.

sults, as it will tend to displace the shuttle. Various means have been devised to prevent such lifting, and usually by means of a spring or springs connected with the lower end of the picker-stick or with the shoe. In my present invention I have devised simple but positively-acting means to absolutely prevent such lifting and said means also facilitates the movement of the picker in a straight path. To this end lateral projections or trunnions 11 are rigidly secured to the shoe at opposite sides thereof and enter and move in the slots 5 of the ears A, hereinbefore described. A convenient form of construction is shown in Fig. 3, the shoe being recessed at 13 and having a transverse hole 14: connecting the recesses, the cylindrical projections 11 having their inner ends reduced at 12 to seat in the recesses. A headed bolt 15 is extended through the projections and through the hole 1 1, a nut 16 being screwed onto the threaded end of the bolt to rigidly attach said projections to the shoe after they have been passed through the slots 5 and seated in the recesses 18.

Referring to Fig. 1, the picker-stick is at the outer end of its stroke and the inner end of the sole 10 is elevated, the projections 11 being then at the upper ends of the slots 5, and it will be manifest that no lifting of the shoe or picker-stick can occur when the parts are so positioned. As the picker-stick is swung inward the sole rocks on the bearing of the support 1, and the projections or trunnions 11 descend in the slots 5 until at midstroke the parts are in substantially the relative position shown in Fig. 4, the cooperation of the projections with the sides of the slots 5 causing a slight bodily movement of the shoe outward on the support as the rocking of the shoe pulls the stick downward far enough to counteract the tendency of the picker to rise as it moves inward. After the stick passes its central position the picker normally tends to descend below a straight line; but this tendency is counteracted by the lift imparted to the shoe as it rocks from the position shown in Fig. 4: At the same time the projections rise in the slots 5 and simultaneously act to impart a slight additional outward bodily movement to the shoe as they.

travel upward to the upper ends of the slots, finally assuming the position shown in Fig. 5 when the picker-stick is at the inner end of its stroke. Manifestly no lift of the shoe can take place at such time, and on the outward stroke of the picker-stick the movements of the parts just described are reversed. The

projections 11 appear to fulcrum upon and move longitudinally over the inner sides of the slots on the inward stroke of the stick and to move and fulcrum on the outer sides of the slot on the outward stroke, the combined action of such shifting fulcrum and rocking of the shoe-sole on the support 1 imparting a very accurate movement to the picker.

A stirrup 17 is cast as an integral part of the shoe and depends therefrom beyond the outersides of the ears 4, the stirrup loosely receiving or surrounding the outer end of the support Without interfering with the rocking movement of the shoe. A spring 8X, Fig. 1,

is connected by a strap 18 with the stirrup to retract or assist in the outward movement of the picker-stick, the opposite end of the spring being fixed, or it may be attached to the stirrup of the opposite picker-stick, both arrangements being employed in the art. In Figs. 4 and 5 I have omittedthe stirrup.

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

1. In a device of the class described, a picker-stick, an attached shoe having a longitudinally-convex sole, a support for and upon which the shoe rocks, and positively-acting means to prevent lifting of the shoe at each end of the stroke of the stick and to effect bodily longitudinal movement of the shoe as it rocks.

2. In a device of the class described, a picker-stick. an attached shoe having a longitudinally-convex sole, a support having an elongated, straight bearing for and upon which the sole rocks, and means to positively shift the fulcrum of and also prevent improper lifting of the shoe from the support.

3. In a device of the class described, a picker-stick, an attached shoe having a longitudinally-convex sole, a support for and upon which the shoe rocks, upturned ears on the support at opposite sides of the shoe and provided with diagonal slots and lateral projections on the shoe adapted to enter the slots and shift the fulcrum of the shoe as it rocks, the connection formed by the projections and slotted ears positively preventing improper lifting of the shoe as it rocks.

4. In a device of the class described, a picker-stick. a shoe secured to the lower end thereof and having a longitudinally-convex sole, a support for and upon which the shoe rocks, upturned, slotted ears on the support at each side of the shoe, lateral projections on the latter to enter the slots and-bodily shift the shoe upon the support as it rocks thereon, and means to prevent lateral twisting of the shoe upon the support.

In testimony whereof I have sign ed my name to this specification in the presence of two subscribing witnesses.

CHARLES F. ROPER.

ICC

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