Патент USA US2120199код для вставки
June 7,1938. . > ‘H. H. BURDETT ‘ - 2,120,199 LOOM Filed Aug. 20, 1957 2 Sheets-Sheet '1 INVENTOR. . HoEA CE h’. 505215771 BY ATTORNEY. June 7, 1938. H. H. BURDET'II" 2,120,199 LOOM Filed Aug. 20, 1937 a “uh-"HT: 2 Sheets-Sheet 2 " % / 2/ 35' \ ATTORNEY. _ Patented June 7, 1938 _ 2,120,199 UNlTED STATES PATENT OFFICE 2,120,199 LOOM Horace H. Burdett, Hopedale, Mass, assignor to Draper Corporation, Hopedale, Mass., a corpo ration of Maine Application August 20, 1937, Serial No. 160,117 1 Claim. (Cl. 139—162) The present invention pertains to ?y shuttle looms, and more particularly to picker checks for such looms. Looms of the type to which my invention ap 5 plies include a forwardly and rearwardly recip rocating lay having a shuttle box, a picker actu ated to pick a shuttle out of the shuttle box, and picker check means for checking the picker and shuttle when the latter returns to the shuttle 10 box. Usually, the picker is ?xed to or engaged by a picker stick and the check means acts on such picker stick. In prior looms of this type, the construction is such that the picker, picker stick, and check element are stationary (except 15 for forward movement with the lay) when the returning shuttle strikes the picker, and the shut tle cannot fully enter the shuttle box unless it possesses appreciably more kinetic energy than is necessary to set the picker, picker stick, and 20 check element in motion. I propose to provide a ?y shuttle loom having a reciprocating lay, shuttle box, shuttle, and picker as aforesaid, a picker check element for checking outward movement of the picker and 25 shuttle when the latter enters the shuttle box, and means, other than the shuttle, for imparting outward motion to the picker and check element just before the picker is engaged by the boxing shuttle, whereby the shuttle is not required to 30 possess as much kinetic energy as in the afore said prior construction. The foregoing and other objects of the inven tion are accomplished in the construction illus trated on the accompanying drawings, of which: Fig. 1 is a perspective view of one side of a loom having the preferred embodiment of my invention applied thereto; Fig. 2 is a side view of the same; Fig. 3 is a plan View, partly in section, showing the mechanism of Fig. 1 with the lay forward; and Fig. 4 is a view similar to Fig. 3 but showing the lay in its extreme rearward position. The drawings show only part of a loom hav 45 ing my invention applied thereto, parts and mechanisms not shown being of usual construc tion well known in the art. It is noted, however, that the complete loom includes a pick motion and picker stick check at each side of the loom 50 and while both such picker stick checks may be constructed in accordance with my invention only one of them is shown and described. The loom frame includes a right hand loom side I. The lay includes a lay beam 2 which extends 55 widthwise of the loom and is reciprocated to ward and from the front of the loom in the usual A shuttle box is provided at each side of the loom, of which the drawings show the right hand shuttle box 3 carried by the lay. A shuttle 4' is adapted to be picked back and forth 5 along the lay, into and out of the shuttle boxes. The shuttle is thus picked by suitable pickers such as the picker 5 which is ?xed on the upper end of a picker stick 6. The picker stick has a shoe 1 which rocks on a parallel 8. The picker 10 manner. stick rocks or moves in an inward, direction, which is toward the center of the loom to pick the shuttle out of the shuttle box 3 toward the other side of the loom. Means for imparting in ward or picking movement to the picker stick and 15 picker may include a pick arm 9 and lug strap Ill. The parts as thus far described in detail are of usual construction and are of the present in vention only in that they may cooperate with other parts, hereinafter described, to form a com 20 plete operative combination. A similar or any suitable picking motion other side of the loom. out of the shuttle box rearwardly and arrives may be provided at the The shuttle 4' is picked 3 as the lay is moving at the other side of the loom as the lay moves forwardly. In the case of a single shuttle loom, the shuttle 4 will return to the shuttle box 3 on the next succeeding forward beat of the lay, as is well known in the art. The picker stick is commonly positioned so that the returning shuttle strikes the picker when the shuttle is only partly entered into the shuttle box. Thus, the picker and picker stick are moved outwardly by the returning shuttle and picker check means are provided for checking 35 the picker and picker stick and assisting in checking the shuttle. The preferred embodiment of the invention in cludes a novel picker check means constructed and arranged to position the picker 5 and picker stick 6 much farther inwardly of the loom, prior to the boxing of the returning shuttle, than has been the practice heretofore. Such check means is further arranged to set the picker stick and movable parts of the check into motion in an out 45 ward direction just before the returning shuttle engages the picker. In the said preferred embodiment, a picker stick check element II is arranged to be moved outwardly of the loom by the picker stick 6 in checking the picker stick and shuttle. To this end the element ll may comprise an- arm I3 which is pivotally mounted on a stud l2 and which has a free end extending forwardly and en gaging the outer side of the picker stick 6. The 2 2,120,199 stud I2 is ?xed in a bracket I 4 which is bolted to the lay and extends rearwardly therefrom. A conventional form of heel spring I5 (Fig. 1) is connected to the picker stick by a strap I6. The heel spring and strap comprise means for yield ingly urging the picker stick outwardly against the free end of the arm I3. The element II is extended rearwardly beyond the stud I2 and the rearwardly extending por 10 tion is provided with an arcuate slot IT. A cam follower member I8 is pivotally supported on the stud I2 below the element II and includes a down wardly extending cam follower I9. A rod 20 is ?xed in the member I8 and extends upwardly 15 through the slot IT. A coiled compression spring 2| on the rod 20 pushes the element II down wardly into frictional engagement with the up per face of the member I8. The cam follower is thus frictionally connected with the arm I3. The 20 frictional connection is suf?ciently strong to cause the arm I3 to be moved by the cam follower but will permit the arm to move relative to the cam follower as will hereinafter appear. The arm I3 is moved by cam means, prefer 25 ably consisting of a stationary cam 22 which has a cam track in which the follower I9 runs. The cam 22 is ?xed to a bracket 23 which is carried by the loom side I. The front portion 24 of the cam track extends forwardly and rearwardly of the loom while the back portion 25 thereof curves rearwardly and outwardly. Since the lay, check element II and cam follower member I8 recip rocate forwardly and rearwardly while the cam 22 remains stationary, the cam will cause the arm I3 to swing inwardly as the lay moves back, and outwardly as the lay moves forwardly. In the embodiment shown, the arm I3 swings ’ inwardly and outwardly each time the lay makes one complete cycle of movement, but is called 40 upon to perform its checking function only upon alternate forward beats of the lay. Starting with the lay at its extreme forward position and with the shuttle 4 in the shuttle box 3, the lay then moves rearwardly and the picking means 9, II] operates to move the picker stick 6 inwardly when the lay is about half way back. Simulta neously with the inward movement of the picker stick, and as the lay continues its rearward move ment, cam 22 moves the cam follower I9 out— wardly, thereby swinging the arm I3 inwardly with the picker stick. Then, as the lay moves forwardly the arm I3 will move outwardly and the spring means I5, I6 causes the picker stick to follow the arm, the shuttle being at the other 55 side of the loom. When the lay next moves rearwardly the shut tle 4 will still be absent from the shuttle box 3 and the picking means 9, II) will not operate. The cam 22 will, however, swing the arm I3 in 60 wardly, and the latter will move the picker stick, as the lay moves rearwardly. This places the arm and picker stick substantially at their inner most positions. The shuttle 4 is then due to re turn to the shuttle box 3 shortly after the lay starts its next forward movement. At the be ginning of such forward movement of the lay the cam 22 imparts outward motion to the arm I3, and the spring means I5, I6 causes the picker stick to move outwardly with the arm. ‘Thus, the picker 5, picker stick 6, and arm I3 are set in motion in an outward direction just prior to or in advance of the time when the re turning shuttle engages the picker 5. The in itial speed of these parts is preferably equal to 10 or slightly less than the speed of the returning shuttle, and is thereafter reduced, to check the picker stick and shuttle. The setting of the picker stick 6 and picker stick check arm I3 in motion in an outward 15 direction prior to the time of engagement of the returning shuttle with the picker relieves the shuttle of the burden of setting these parts in motion. The results are a more uniform and reliable checking of the shuttle and picker stick, 20 a reduction in the possibility of “bang-off’” due to a weak pick, and some saving in the power required to pick the shuttle across the loom and into the shuttle box. It may happen that, because of improper set 25 ting of the pick motion or for other reasons, the shuttle will enter the shuttle box at much greater velocity than the velocity of the outward move ment of the picker permitted by the cam 22. In this case, the frictional connection between the 30 cam follower member I8 and the arm I3 will yield, to permit the picker stick 6 and arm I3 to be moved by the picker stick independently of the cam follower. Outward movement of the arm I3 is limited by a stop 26 which is formed integrally with the bracket l4 and projects down wardly beside the rearward extension on the arm as shown more clearly on Fig. 3. After the arm I3 has been moved outwardly to the posi tion determined by the stop 26, but on the same 40 forward beat of the lay, the cam 22 will con tinue to swing the cam follower I9 inwardly, thereby restoring proper angular relation be tween the cam follower member I3 and the arm. An adjusting screw 21 carried by the member I8 45 engages the rearward extension on check ele ment II to adjust the check element relative to the cam 22. I Having fully disclosed the preferred embodi ment of my invention, I claim: 50 In a fly shuttle loom, a forwardly and rear wardly reciprocating lay, a picker stick, means imparting inward picking movement to said pick er stick as the lay moves rearwardly, a picker stick check comprising a pivoted arm having a 55 free end engaging the outer side of said picker stick, a cam follower, means frictionally connect ing said arm with said cam follower, and cam means engaging said cam follower for swinging said arm inwardly as the lay moves back and 60 outwardly as the lay moves forwardly, said fric tional connection yielding to permit said arm to be moved outwardly by said picker stick. HORACE H. BURDETT.