US760994A - Picker-check for looms. - Google Patents

Description

y PATENTED MAY'24, 1904.

R. JAMIEsoN. PICKER @HECK PoR Looms.,

APPLICATION FILED JAN. 28, 1904.

N0 MODEL.

Tn: mams Eures w., mcnxumo, WASHINGTON, D. c.

Patented May 24, 1904.

UNITED STATES PATENT OFFICE.-

ROBERT JAMIESON, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER COMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORA- TION OF MAINE.

PICKER-CHECK FOR LOOMS- SPECIFICATION forming part of Letters Patent No. 760,994, dated May 24, 1904.

Application filed January Z8, 1904. Serial No. 190,955. (No model.)

lowing description, in connection with the ac` companying drawings, is a specification, like characters on the drawings representlng like parts.

This invention has for its object the production of novel and effective means for checking the picker in a loom either when the incoming shuttle strikes the picker or when the latter on its inward stroke has thrown the shuttle from the shuttle-box.

In the present embodiment of my invention a strap or band, preferably of leather, is made into a closed loop by bringing its ends together and holding them in fixed position by a member rigidly mounted on the lay, the picker-stick moving within and longitudinally of the loop, the length of Ywhich is less than the stroke of the picker-stick.

The movable side of the check-loop opposite its fixed side is controlled by a friction device or brake, which resists and retards the movement of the loop side as the picker-stick alternately strikes the opposite ends of the loop, the resistance afforded by the friction device serving to check the picker-stick and picker.

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

Figure 1 is a rear elevation of one end of the lay of a loom with a shuttle-box thereon and with one embodiment of my picker-checking means applied thereto. Fig. 2 is a front I elevation of the end of the lay and the checking means. Fig. 3 is a transverse section on to oscillate in the longitudinal slot a3 in the lay below the shuttle-box, may be and are all of well-known or usual construction. A bracket or stand 1 is rigidly secured to the front of the lay, as by a suitable bolt 2, and depends below the lay near the outer ,end of the shuttle-box, a headed bolt 3 extending through the lower end of the bracket and passing through elongated slots 4 in the overlapped ends of a strap 5, preferably made of leather. A washer 6 and nut 7 adapted to be screwed upon the threaded end of the bolt 3, clamp the two ends of the strap firmly together upon the bracket, the strap thus being formed into an elongated closed check-loop surrounding the picker-stick and being held fxedly at one side. By loosening the nut 7 the loop can be lengthened or shortened, as desired, to conform to the desired stroke of the picker-stick, the elongated slots 4 in the strap ends permitting such adjustment. The length of the loop from end to end is shorter than the stroke of the picker-stick in order that the latter may be effectively checked at each end of its stroke, as will appear hereinafter. Y

A friction device or brake is arranged to act upon the movable side of the loop opposite its fixed side and by the resistance exerted upon such side of the loop the movement of the picker-stick is checked, the friction device or brake being made adjustable in order that the checking action may be varied.

Referring to Figs. 1 and 3, a strong bracket 8 is secured by a suitable bolt 9 vto the back of the lay opposite the stand 1, as herein shown, said bracket having a depending web 10, with its rear face recessed to leave two parallel upright ribs 11 and two lugs 12 at the lower corners of the web beneath the ribs. A horizontal shoulder 13 at the lower end of the web is located between the lugs 12 and substantially in alinement with their upper faces. The movable side of the loop 5 slides over the face of the web between -the lugs and the lower ends of the ribs 11 and is guided thereby, while its lower edge is supported by the shoulder 13, as clearly shown in Fig. 3. A bolt 14 is carried by and passed through the web about midway between the ribs and lugs and extends through an elongated slot 15 in the movable side of the loop, (see Fig. 4,) so that said side can move longitudinally in either direction.

As shown in Figs. 3 and 4, the face of the web toward the front of the loom is recessed to accommodate the bolt-head, the web being also thereby lightened without undue loss of strength and rigidity.

A friction -plate 16, preferably made of metal, is shaped substantially like a cross, as shown in Fig. 1, to fit in between the inner edges of the ribs 11 and lugs 12 and also between the tops of the latter and the lower ends of the ribs to prevent any turning movement of the plate while guiding it when moved toward or away from the face of the web 10, the bolt 14 passing through a hole in the center of the plate. On its outer face the friction-plate has an annular depression or seat 17 concentric with the bolt to receive one end of a coiled spring 18, the opposite end of the spring being seated in the recessed face of a holding-washer 19.

A nut 20 is screwed onto the threaded end of the bolt 14 outside and adjacent the washer, which latter is mounted loosely on the bolt.

From an inspection of Figs, 3 and 4 it will be seen that the friction plate or brake 16 bears against Ythe face of the movable side of' the loop 5, being held against it yieldingly by the action of the spring 18, and presses the strap against the face of the web. The resistance to movement of the loop side will be increased or reduced by setting up or slacking off the nut 20, as thereby the tension of the spring 20 will be increased or diminished, so that a very ready and accurate adjustment of the resistance can be easily and quickly effected. When the picker-stick approaches either end of its stroke, it hits the end of the loop 5 and pulls the movable side of the loop in the same direction, such movementI being resisted by the action of the friction device or brake. The greater the tension of the spring 18 the greater the checking action upon the picker-stick, and vice versa, the lengthening of one end of the loop shortening the opposite end in readiness to act upon the pickerstick when it approaches the opposite end of its stroke.

The construction is simple and very effective, and the ready adjustment of the friction device permits regulation of the checking' means to conform to the speed of the loom, weight of the shuttle, &c., as may be neces- Sary.

My invention is not restricted to the precise construction and arrangement herein shown and described, as the same may be varied or rearranged in various particulars by those skilled in thc art without departing from the spirit and scope of my invention.

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

1. In a loom, a picker-stick, a flexible checkloop therefor, and a yieldingly-controlled friction device to coperate with and resist longitudinal movement of the loop, said device comprising opposed friction members between which the side of the loop passes, and a spring to yieldingly press said members toward each ther and resist longitudinal movement of the oop.- v

2. In aloom, a lay, a picker-stick, a flexible, elongated check -loop therefor, means connected with the lay to support the loop, a spring-controlled friction device to coperate with and resist longitudinal movement of the check -loop when the picker -stick engages either endthereof, and means to vary the effective length of the check-loop.

3. In a loom, alay, a picker-stick, a iieXible and elongated check-loop therefor, means carried by the lay to support the check-loop, fixed and movable friction-plates between and in contact with which the side of the loop is eX- tended, and adjustable means to act upon the movable plate and press it yieldingly against the adjacent face of the loop side.

4. In a loom, a lay, a picker-stick, a flexible, adjustable check-loop therefor, a supporting connection between the lay and one side of the loop, and a friction device to coperate with and resist longitudinal movement of the opposite side of the check-loop, said device comprising opposed and relatively movable friction members, a controlling-spring therefor, and means to vary the tension of the spring. i

5. In a loom, a lay, a picker-stick, aflexible and elongated -check-loop therefor, brackets depending from the lay, means to rigidly connect one of said brackets and one side of the loop, a shoulder on the other bracket to support the opposite, movable side of the loop, a friction-plate cooperating with said side and carried by the adjacent bracket, and adjustable means to yieldingly press the frictionpltte against the face of the movable loop s1 e.

6. In a loom, a lay having a depending bracket provided with a projecting bolt, a picker-stick, a check-strap therefor having its ends overlapped to form a check-loop and longitudinally slotted to receive the bolt, means to clamp said ends upon each other and the bracket, a friction device or brake carried by the lay and cooperating with the opposite, longitudinally-movable side of the loop, and means to adjust the friction device and thereoy regulate the resistance to movement of the oop.

7 In a loom, a lay, a picker-stick, an elon- IOO.

IIO

gated and adj ustable,exible check-loop therefor, means carried by the lay to hold one side of the loop from movement, and adjustable means also carried by the lay to frictionally engage and resist longitudinal movementJ of the opposite side of the loop due to impact of the picker-stick upon the ends of the loop, said means including a fixed and a movable frictionplate, a spring acting upon the movable plate, and an adjusting device to regulate the tension of the spring.

8. In a loom, a lay, a picker-stick, alexible check-loop therefor having a longitudinal slot in the side, a friction-plate lixedly connected with the lay and having a bolt extended through the slot, a movable friction-plate slid-

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