US2793658A

US2793658A - Lay and pilot guides

Info

Publication number: US2793658A
Application number: US453281A
Authority: US
Inventors: George W Dunham
Original assignee: Individual
Current assignee: Individual
Priority date: 1954-08-31
Filing date: 1954-08-31
Publication date: 1957-05-28
Anticipated expiration: 1974-05-28

Description

May'ZS, 1957 Filed Aug. 31, 1954 G. W. DUNHAM LAY AND PILOT GUIDES .2 Sheets-Sheet 1 INVENTOR.

y 1957 e. w. DUNHAM 2,793,658

LAY AND PILOT GUIDES Filed Aug. 31, 1954 2 Sheets-Sheet 2 INVENTOR. [161M fi/Jkmfiam ,9 7 TO/P/VEY United States Patent LAY AND PILOT GUIDES George W. Dunham, Westport, Conn. Application August 31, 1954, Serial No. 453,281

6 Claims. (Cl. 139-188 across a loom. In the apparatus of the present invention;

the raceway for the pilot is constructed from a plurality of plate-like guides which have notches providing edges for guiding a pilot and which confine the pilot over the expanse of an arc of 180 degrees about the longitudinal axis of the pilot as it travels across the loom. The guides are mounted in such a manner that the alignment of the notches can be assured by a finishing process which trues the corresponding edges of the various notches in alignment. The guides are mounted on a shaft which is carried by the lay assembly and mechanism is provided for rocking the guides between a position directly in front of a reed or other comb-like structure by which a filling thread is heat up and a forward position in which the guides are lowered to below the fell of the-cloth and temples of the loom. The guides are moved between these positions as the lay is reciprocated. The rocking lay even for a lay supported on long or standard lay swords. The pilot guiding notches in the guides are so disposed that their openendscome adjacent to the front plane of the comb-like structure so that the structure provides a guiding plane which together with the edges of 2,793,658 Patented May 28, 1957 are of standard length. The lay is a rigid beam which is provided with a plurality of grooves 12' for accommodating the plate-like guides 13 when these guides move to below the fell of the cloth and the temples 14. A reed 15 is mounted between the lay 10 and the hand rail 16 which also is attached to the lay swords 11, A pilotprojecting and receiving box 17 is mounted at each end of the lay so that these boxes alternately project and receive a pilot 18 which carries filling thread 19 lengthwise of the lay and through the shed 20 which is formed by manipulating the warps upwardly and downwardly in the usual manner as the lay is reciprocated. Each lay sword is reciprocated by a connecting rod 21 which is pivoted at its front end to a pin 22 carried by the lay sword and is pivoted at its back end to a pin 23 carried by a crank 24. The shaft on which the cranks 24 are mounted is driven from a power source operating through a gear 26. i i g The plate-like guides 13 may be stamped or cut from a durable sheet material such as steel and are finished to provide the notches 27 and the perforations 28. The

guides are formed as goose necks to properly locate the notches and to clear the bottom rail of the reed when they approach the reed, as will appear more fully hereinafter. The notches 27 are located at the upper ends of the guides and open rearwardly. The edges of the notches define a polygonal figure providing enough bearing edges to restrain the pilot from lateral motion throughout an arc of 180 about the axis of the pilot.

It is advantageous to employ a pilot having a rectangul lar crosssection with rounded corners but in any case the notch is proportioned to circumscribe three side surfaces of the pilot and to provide pilot-engaging edges above, below and to one side of the pilot. The notch is sufiiciently deep to havethe fourth side of a pilot travel along the front of a reed or other comb-like structure when the guides are in position to receive the pilot. I preferably provide a rectilinear notch having an upper edge 29 and a lower edge 30 and a connecting edge 31 so that when the guides are mounted on a rocker shaft 32,

the corresponding edges of the several guides can easily of the guides enables the shortening of the stroke of the engage keyways in the guides, but they can 'be fastened the guides confines a pilot as in a tunnel as the pilot is shot across the loom.

It is among the objects of the invention to provide means for mounting a plurality of plate-like guides in spaced relation and in such a manner that the notches in the guides can easily be qualified to assure that the guiding edges are aligne Another object is to provide pilot guides and mechanism for rocking the pilot guides through the warps to a position for guiding a pilot or other filling threadcarrying device and for returning the pilot guides to below the temples as the lay is reciprocated during a weaving operation.

The principle of the invention will be easily understood from a more detailed description of an embodiment thereof which is intended to serve as an illustration of its application.

In the drawing, Fig. 1 is a plan of one end of a lay assembly of which the other end is similarly constructed; and

Fig. 2 is a vertical section on line 2-2 of Fig. 1.

Referring to the drawing, the lay 10 is mounted upon and extends between the lay swords 11 which are mounted on a pivot shaft 12. The lay swords illustrated of the trunnions, Fig. 1.

in any manner as by welding. The guides are separated from one another by spacers, such as the sleeves 33 on the shaft 32, and occasionally along the shaft by a trunnion 34 for the shaft and

washers

35 and 36 at the sides The ends of the spacers are square to the axis of the shaft and so maintain the guides parallel to one another. The

trunnions

34 and 37 are carried by brackets which are supported from and extend rearwardly from the lay 10. a

As the lay is reciprocated backwardly and forwardly, the shaft 32 is rocked on its axis to swing the guides be-.

tween a position below the temples 14 and a position in which the notches 27 of the guides are disposed in front of the reed, as shown in broken lines in Fig. 2. This is accomplished by a cam motion. A cam plate 38 is pivoted on a pin 39 which extends from a block 40 bolted to the lay sword 11. The cam has a cam groove connecting between and including a high are portion 41 and a low arc portion 42. The shaft 32 carries an arm 43 rigidly attached thereto and which has a cam follower or roller 44 at its outer end. The cam follower is engaged in the groove of the cam 38, and as the cam is pivoted on the pin 39 it rocks the shaft 32 in its trunnions.

A link 45 is pivotally connected to the cam 38 by a pin 46 and to a stationary pivot pin 47. As the lay assembly is moved backward from the position illustrated in Fig. 2, the cam 38 is rocked clockwise and the arm 43 rocks the shaft 32 and guides clockwise from below the temples 14.

During the initial backward movement of the lay assembly the pilot guides remain below the temples as the follower travels along the high are portion 41 and until the follower has started to move inwardly towards the low arc portion 42 of the cam. As the follower continues to move toward the low arc portion 42, the guides enter the shed and approach towards the reed. When the follower is guided by the low arc portion 42, ;the guides are disposed with the open ends of their notches facing the reed, as illustrated in broken lines in Fig. 2. In this position of the guides the pilot is restrained by the guides and the reed from wobbling in any direction as it is shot through the tunnel-like structure provided by the edges of the notches and the front of the reed. On the forward movement of the lay, the action of the cam 38 and the rotation of the shaft 32 are reversed and the guides 13 are brought below the temples. It is intended that if a comb is employed in front of a reed that the comb provide the rear guiding plane for the pilot and in that respect serve in the same manner as the reed 15 even though it does not extend to the full height of the notches 27.

This invention is capable of numerous forms and various applications without departing from the essential features herein disclosed. It is therefore intended and desired that the specific description herein be deemed illustrative and not restrictive and that the patent shall cover all patentable novelty herein set forth; reference being had to the following claims rather than to the particular showing herein ,to indicate the scope of this invention.

What is claimed is:

1. In a loom, a pivoted assembly reciprocable between back and front positions and comprising a lay, lay swords and a comb-like device for beating up a filling thread, a rock shaft pivotally mounted on said assembly, pilot guides fixed to said rock shaft and movable thereby to rock about the axis of said rock shaft, means for reciprocating said assembly, and means to control the rocking of said rock shaft and guides as said assembly is reciprocated between back and front positions.

2. In a loom, a pivoted assembly reciprocable between back andfront positions and comprising a lay, lay swords and a comb-like device for beating up a filling thread, a rock shaft pivotally mounted on said assembly, a plurality of pilot guides spaced apart and fastened to said rock shaft, said pilot guides having aligned notches opening toward and back of the loom, means for rocking said shaft to position said notches in a shed as said assembly moves backwardly and to lower said guides below the cloth being woven as said assembly moves forwardly,

and means to reciprocate said assembly backwardly and forwardly.

3. In a loom, a pivoted assembly reciprocable between back and front positions and comprising a lay, lay swords and a comb-like device for beating up a filling thread, a rock shaft pivotally mounted on said assembly, a plurality of pilot guides spaced apart and fastened to said rock shaft, said pilot guides having notches opening towards the back of the loom and having aligned edges to guide three sides of the pilot, means for rocking said shaft in one direction to position said notches adjacent said comblike device to complete a pilot-guiding tunnel with said device and away from said device in 'the opposite direction, and means to reciprocate said assembly.

4. In a loom, a pivoted assembly comprising a lay, lay swords and a comb-like device for beating up a filling thread, a shaft pivotally mounted on said assembly, a plurality of pilot-guides fastened to said shaft in spaced relationship, means for reciprocating said assembly, and

means for rocking said shaft as said assembly is reciprocated, said shaft-rocking means comprising an arm fastened to said shaft, a cam pivotally mounted on said assembly, a cam follower carried by said arm, and means pivotally connected to said cam to pivot said cam in respect to said assembly as said assembly is reciprocated.

5. In a loom, a pivoted assembly comprising a lay, lay swords and a comb-like-device for beating up a filling thread, a shaft pivotally mounted on said assembly, a plurality of pilot-guides fastened to said shaft in spaced relationship, each of said guides having a notch opening toward the back of the loom, the notches of said guides having edges to prevent a pilot disposed in said notches from moving laterally in any direction within an arc of 180 about the longitudinal axis of the pilot, means for reciprocating said assembly, and means for rocking said shaft and guides to position the openings of said notches adjacent to said comb-like device so that said device and said notches may guide the flight of a pilot lengthwise of said law.

6. In a loom, a lay and lay swords, means for pivotally supporting said lay swords for backward and forward reciprocation, .a rock shaft, guide means for guiding a pilot lengthwise of said lay, said guide means comprising a reed carried by said lay and a plurality of notch being defined in part by parallel upper and lower edges intersecting the rear edge of the plate and spaced apart a distance slightly greater than the vertical dimension of said pilot and an edge normal to said parallel edges and spaced from said rear edge a distance less than the horizontal dimension of said pilot, means for actuating said rock shaft and guides to and from a position in which the rear edges of said plates are adjacent said reed and said notches are disposed with their open sides facing said reed so that said reed prevents lateral displacement of said pilot from said notches as said pilot is pro jected through said notches, and means for reciprocating said assembly.

References Cited in the file ofthis patent UNITED STATES PATENTS