US2069450A - Bunch building mechanism - Google Patents

Description

Feb. 2, 1937.

J. A: JESSEN BUNCH BUILDING MECHANISM Fi1 e d Aug. 17, f 1954 '6 Sheets-Sheet l Feb 2, 1937.

J. A. JESSEN BUNCH BUILDING MECHANISM Filed Aug. 17, 1934 6 Sheets-Sheet 2 INVENTOR.

y M ATTORNEYS.

Feb. 2, 1937. J. A. JESSEN 2,069,450

BUNCH BUILDING MECHANISM Filed Aug. 17, 1954 e Sheets-Sheet a INVENTOR.

, BY M 1937- J. A. JESSEN BUNCH BUILDING MECHANISM 6 Sheets-Sheet 4 INVENTOR. I t g i I ATTORNEYS.

Filed Aug. 17, 1934 Fell .J. A. JESSEN BUNCH BUILDING MECHANISM FiledAug. 17, 1934 '6 Sheets-Sheet 5 l NVEN TOR.

ATTORNEYS.

Feb. 2, 1937. EN 2,069,450

BUNCH BUILDING MECHANISM Filed Aug. 17, 1954 6 Sheets-Sheet 6 BY dfieww/ A TTORN E Y5,

VII

Patented Feb. 2, 1937 PATENT OFFICE BUNCH BUILDING MECHANISM John A. Jessen, Whitinsville, Mass, assignor to Whitin Machine Works, Whitinsville, Mass., a corporation of Massachusetts Application August 17, 1934, Serial No; 740,313

9 Claims.

This invention relates to spinning frames and particularly to the winding of bobbins thereon for use in automatic weft replenishing looms. For such purposes it is customary to wind a small preliminary bunch of yarn on each bobbin adjacent the base or butt and before the regular winding of the bobbin is started.-

It is the general object of my invention to provide an improved and simplified mechanism for such purposes, by which mechanism a preliminary bunch of yarn of the desired size may be wound on the bobbin by the provision of a special short traverse of the ring rail or spindle rail, and by which mechanism the regular traverse and winding will be automatically substituted for the short traverse as soon as the desired bunch has been produced.

In the preferred form of my invention, I provide a manually insertable member which controls the winding of a bunch and which is released from the building mechanism as soon as the bunch is completed.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

Two forms of my invention are shown in the drawings, one form relating to spinning frames having movable spindle rails and the other form to frames having movable ringrails.

In the drawings,

Fig. 1 is a front elevation of a builder mechanism for a spinning frame having a movable or traversing spindle rail;

Fig. 2 is an enlarged front elevation of certain parts of said builder mechanism and of a bunchbuilding attachment therefor;

Figs. 3 and 4 are detail sectional plan views, taken along the lines 3-3 and 4-4 in Fig. 2 respectively;

Fig. 5 is a front elevation of a builder mechanism for a spinning frame having a movable or traversing ring rail;

Fig. 6 is a front elevation of a bobbin having a bunch wound thereon;

Fig. 7 is an enlarged front elevation of certain parts of the builder mechanism shown in Fig. 5, the parts being in the position for regular wind and certain parts being shown in section;

Fig. 8 is a side elevation, looking in the direction of the arrow 8 in Fig. 7;

Fig. 9 is a view similar to Fig. 7 but showing the parts set for winding a bunch;

Fig. 10 is a view similar to Fig. 9 but showing the parts in a different relation;

Fig. 11 is a sectional plan view, taken along the line in Fig. 9;

Fi 12 is a front elevation ofthe removable cam bar which controls the winding of the bunch, and 5 Fig. 13 is an end view of the cam bar, looking in the direction of the arrow |3 in Fig. 12.

Referring to Figs. 1 to 4, I have shown my invention applied to a spinning frame having a fixed ring rail 20 and having a spindle rail 2| 10 mounted on lifter rods 22 (Fig. 1) by which the rail 2| and spindles S are given a vertical traversing movement or reciprocation.

The lower end of one lifter rod 22 is connected by a chain 23 to a bar 24 secured to a sliding block 25. The block 25 is seated against the end of a shaft 26 threaded into a nut 21 having a swivel mounting in a bracket 28 adjustably secured to the upper endjof a builder lever 29 mounted to swing about a fixed pivot 30. r

A roll 3| is pivoted on a stand 32 adjustable lengthwise along a guideway or flange 33 of the builder lever 29 and adapted to be clamped in selected position thereon.

The roll 3| engages a side surface 34 of an intermediate lever 35 extending downward from a fixed pivot 36. A cam follower or roll 31 is rotatably mounted on the lever 35 and normally engages a heart cam 38 continuously rotated with a driven supporting shaft 39.

The shaft 26 is keyed to slide in a sleeve 26**, continuously and slowly rotated by a positive gear drive identical with that shown in Fig. 5. As the sleeve 26 and shaft 26 are slowly rotated in the direction of the arrow at in Fig. 1, the block 25 is correspondingly moved to the left, thus lowering the spindle rail 2| and shifting the winding locus toward the tip of the bobbin.

The parts thus far described are of the usual type found in the commercial Skaife builder motion and in themselves form no part of my present invention.

in addition to these usual parts, I provide the cam shaft 39 with pinion teeth 40 (Figs. 2 and 3), and I provide a fixed guide member 4| (Figs. 4,5 2 and 4) for a removable cam bar 42. A cover plate 43 retains the cam bar 42 in the guide member 4| but permits sliding movement relative thereto.

The cam bar 42 is provided with rack teeth 44 engaging the pinion teeth 40 on the cam shaft 39. The cam bar is also provided with a cam surface 45 positioned to engage a portion of the cylindrical surface of the roll 31, which roll may be of increased axial length as indicated in Fig. 3.

The cam surface is formed in a series of alternating raised and depressed portions or scallops, as clearly shown in Fig. 2, the relative depth of the scallops governing the traverse of the spindle rail while winding the bunch. The number of scallops similarly determines the number of traverses of the ring rail during the bunch winding, and the length of the cam bar determines the yardage of the bunch, as will be described.

Having described the details of construction of this form of my invention, the method of use is as follows:

Assume that a set of bobbins have been filled and doffed and that the spindle rail has been manually returned to initial position, with the point of the cam 38 positioned as shown in Fig. 2. and with the roll 31 engaging the point of the cam.

The cam bar 42 is then manually inserted from the top in the guide member 4| and is allowed to slide downward to the position shown in Fig. 2, in which the lowermost rack tooth 44 engages one of the pinion teeth 40.

The pinion is shown herein as having twelve teeth and the rack as comprising thirty teeth. Consequently the cam bar 42 will be moved downward and will complete its downward movement during approximately two and one-half revolutions of the shaft 39 and cam 38, and at the end of this period the roll 31 will engage the heel of the cam 38. Thereupon, the cam bar 42 will be released and will drop to the floor, and the regular traverse of the spindle rail 2| under the control of the heart cam'38 will commence.

During these two and a half revolutions of the cam 38 and the corresponding downward travel of the cam bar 42, some eight short traverses of the yarn on the bobbins will have been produced by the successive raised and depressed portions or scallops of the cam surface 45, which will have been followed by a partial winding toward the tip of the bobbin as the roll 3'! moves along the reduced end portion 45 of the cam surface 45.

From this description it will be seen that after the cam bar is placed in operative position as shown in Fig. 2, the entire operation is automatic and the builder mechanism winds the desired bunch and shifts to regular traverse without further attention.

A bobbin B having a preliminary bunch of yarn Y wound thereon is shown in Fig. 6, which also indicates in dotted lines the outline of the fully wound bobbin. By varying the length of the cam bar and the number of rack teeth thereon, the time of bunch winding may be varied, with corresponding change in the yardage.

Referring to Figs. 5 to 13 inclusive, I have shown my invention applied to a spinning frame having a fixed spindle rail and having a movable ring rail 5| mounted on lifter rods 52 and reciprocated by a builder motion which is in general of the type previously described and known commercially as the Skaife builder motion.

In this type of spinning frame, it is necessary that the bunch be wound with the movable ring rail 5| approximately at its lowest limit of travel, While in the construction previously described the bunch is wound with the movable spindle rail 2| approximately at its upper limit of travel. This difference in operation renders necessary certain differences in construction which will now be described. 7

The heartcam 38 and cam shaft 39 with pinion teeth 40 may be as previously described, but the cam follower or roll 55 (Figs. '7 and 11) is not mounted directly on the intermediate lever 55 as in the previous construction but is mounted on a support 51 (Fig. 8) pivoted at 59 on the lever 56 and. yieldingly pressed toward the cam 38 by a spring 50.

The support 51 has a segmental end surface 6| (Fig. 7) and a notch 62. During the normal operation of the spinning frame, a rotatable latch or rotary locking pin 63 is seated in the notch 62, as shown in Fig. '7, thus locking the support 5'! in fixed relation to the lever 56, so that the roll 55 coacts with the cam 38 as in the previous construction.

The latch 63 is preferably formed by slabbingoff the middle portion of a stud or pin 64 (Fig. 8), which stud is rotatably mounted in the spaced side portions of the intermediate lever 56. The stud 64 is provided at its forward end with a plate 65 having a knob or handle 66 at its upper end.

A coil spring 6! is secured at 68 to the plate 65 and is secured at 69 to the lever 56. Stop pins EB and ll limit movement of the plate 65 in both directions and a spring plunger 12 connected to the knob or handle 66 enters a recess 13 (Figs. 8 and 9) when the latch 63 is in normal locking position.

A cam roll 15 (Figs. '7, 8 and 11) is mounted in a recess in the rear face of the intermediate lever 55 and is rotatably supported on a plate secured to the lever 56 by screws H. A guide member (Fig. 11) is secured to a girt or other fixed portion of the spinning frame as in the previous construction and provides a guideway for a cam bar 8i, which is retained in position relative to the member 80 by a cover plate 82.

The cam bar 8! has rack teeth 83 engaging the pinion teeth 45 when the cam bar is in operative position. The cam bar BI is also provided with a cam surface 85 adapted to cooperate with the auxiliary cam roll 15 when the bar is in the position indicated in Figs. 9, 10 and 11.

A lug 85 (Figs. 9 and 11) projects rearward from the roll support 51 and engages a shoulder or ledge 87 (Figs. 12 and 13) formed on the side of the cam bar 8|. This ledge 81 is cut away at 88 in Fig. 12 to permit insertion of the cam bar and is also cut away as indicated at 89 for a purpose to be described. The cam bar 8| is also provided with a shoulder 90 at its rear side by which the cam bar is retained in the fixed guiding member 80.

I will now describe the operation of the bunch 4 building mechanism shown in Figs. 5 to 13 and as applied to a spinning frame having a traversing ring rail.

It is obvious that the bunch, being located adjacent the butt of the bobbin, must be wound with the ring rail approximately at its lowest limit of travel. Accordingly, the spinning frame is stopped with the roll 55 at the heel of the cam 38, as shown in Fig. 7, and with the ring rail 5| substantially in its lowest position, the ring rail being wound down at the time of doifing.

The cam bar 8| is then placed in the position indicated in Fig. 9, and the spring plunger 12 (Fig. 8) is withdrawn from the recess 13. The plate 65 is then swung to the position indicated in Fig. 9, thus unlatching the cam roll support 51.

The spring 50 (Figs. 7 and 8) not being strong enough to support the unbalanced weight of the ring rails, the regular cam roll 55 and its support 51 will swing to the right toward the posi.

tion indicated in Fig. 10, permitting the auxiliary cam roll E5 to engage the cam surface 85 on the cam bar 8! as in Fig. 10.

As the cam shaft 39 and cam 38 are thereafter rotated, the cam bar 8| will be gradually fed downward as indicated in Fig. 10 by engagement of the rack teeth thereof with the pinion teeth 45!. The cam roll support 57 will be swung idly back and forth by the cam 33 against the tension of the spring 68. The lug 86 (Fig. 11) will engage the shoulder 8? whenever the cam 38 approaches the position shown in Fig. 9, thus preventing the cam roll support 57 from swinging far enough to the left to be locked by the latch 63.

The winding of the bunch will continue as the cam bar Bl is fed downward, as in the form previously described. The length of the bunch will be determined by the depth of the recesses or scallops in the cam surface 85, and the yardage will be determined by the length of the cam bar, the number of layers being also determined by the number of scallops.

As the winding of the hunch is completed, the lug 86 passes beyond the ledge 87 on the cam bar BI and reaches the cut-away portion 89. On the next movement of the cam follower 55 into the heel of the cam 38, the support 57 swings so far to the left that the latch 63 enters the notch 62 and the spring plunger 12 reenters the recess 13, thus locking the parts in the position for regular traverse. The cam bar 8| is thereupon released and falls out of the builder mechanism, which mechanism requires no further attention until the winding of the set of bobbins is completed.

In both forms of my invention I utilize an auxiliary cam bar which is manually inserted in operative position after each doff and which is automatically released from the builder mechanism after the winding of the hunch is completed. In both forms the length of the bunch as well as the yardage and number of traverses is determined by the configuration of the cam surface and by the length of the cam bar. A bunch of any desired dimensions may be produced by using a suitably selected cam bar. As the cam bar itself is extremely simple in construction, a set of such bars of different lengths and configurations may be provided at slight cost.

Furthermore, it will be noted that the application of my improved bunch building mechanism does not change or modify the operation of the usual commercial builder mechanism to which it is applied and that said mechanism is perfectly adapted for ordinary purposes when no bunch is desired on the bobbins.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

1. In a spinning frame, a builder mechanism comprising a continuously rotating cam, a cam roll, a lever supporting said cam roll and normally oscillated by said cam and cam roll, said lever depending substantially vertically from a fixed pivot at its upper end, an auxiliary cam bar, a fixed and substantially vertical guideway for said bar, and a pinion rotated with said cam and maintained at all times in an axially fixed operative position with respect to said guideway, said pinion engaging rack teeth on said auxiliary cam bar and thereby controlling the downward movement of said cam bar by gravity along said guideway to effect a series of short bunch-building oscillations of said lever, said cam bar being freely inserted manually in the upper end of said guideway when the frame is doifed and said cam bar being automatically released and dropped by gravity from the lower end of said guideway and from said builder mechanism after the bunch is wound.

2. In a builder mechanism, a. continuously rotating earn, a lever, a cam roll on said lever normally. engaged by said cam, a cam bar movable along a fixed path and having a cam surface also engageable with said cam roll, and means to give said cam bar an operative movement with respect to and in engagement with said cam roll at a predetermined speed, said rotating cam being inoperative when said cam bar is in operative engagement with said cam roll and becoming operative as said cam bar is moved out of engagement with said cam roll.

3. In a builder mechanism, a continuously rotating cam, a lever, a cam follower on said lever normally engaged by said cam, a displaceable cam bar mounted to move in a fixed path adjacent said cam and engageable with said cam follower, and means to move said cam bar at a predetermined rate to give said lever a succession of short oscillations, said rotating cam being inoperative when said cam bar is in operative engagement with said cam roll and becoming operative as said cam bar is released and displaced.

4. In a builder mechanism, a continuously rotating cam, a lever, a regular cam follower, a support for said cam follower pivoted on said lever, manually releasable means normally effective to lock said support in a predetermined position on said lever, an auxiliary cam follower on said lever, auxiliary cam means engaging said auxiliary cam follower to give said lever a succession of short oscillations, and means to restore said first cam follower and support to said predetermined position when said auxiliary cam means becomes inoperative.

5. In a builder mechanism, a continuously rotating cam, a lever, a regular cam follower, a support for said cam follower pivoted on said lever and manually releasable from a predetermined position on said lever, an auxiliary cam follower on said lever, auxiliary cam means engaging said auxiliary cam follower to give said lever a succession of short oscillations, means to move said first cam follower and support to said predetermined position when said auxiliary cam means becomes inoperative, and means to automatically lock said support in said predetermined position.

6. In a builder mechanism, a continuously rotating cam, a lever, a regular cam follower, a support for said cam follower pivoted on said lever and manually releasable from a predetermined position on said lever, an auxiliary cam follower on said lever, auxiliary cam means engaging said auxiliary cam follower to give said lover a succession of short oscillations, means to move said first cam follower and support to said predetermined position when said auxiliary cam means becomes inoperative, and means to prevent return movement of said support to said predetermined position during said short oscillations.

7. In a builder mechanism, a continuously rotating cam, a lever, a regular cam follower, a support for said cam follower pivoted on said lever, manually releasable means normally effective to lock said support in a predetermined position on said lever, an auxiliary cam follower on said lever, a cam bar movable in a fixed path adjacent said auxiliary cam follower and hav ing a cam surface with a series of scallops therein, said cam surface engaging said auxiliary cam follower, and means to move said cam bar to give said lever a succession of short oscillations.

8. In a builder mechanism, a continuously rotating cam, a lever, a regular cam follower, a support for said cam follower pivoted on said lever, manually releasable means normally effective to lock said support in a predetermined position on said lever, an auxiliary cam follower on said lever, a cam bar movable in a fixed path adjacent said auxiliary cam follower and having a cam surface with a series of scallops therein, said cam surface engaging said auxiliary cam follower, and means to move said cam bar to give said lever a succession of short oscillations, said cam bar having a portion engaging a lug on said support and thereby preventing full return movement of said support to locking position until the operation of said cam bar is substantially completed.

9. In a builder mechanism, a continuously rotating cam, a lever, a regular cam follower, a support for said cam follower pivoted on said lever, manually releasable means normally effective to lock said support in a predetermined position on said lever, an auxiliary cam follower on said lever, a cam bar movable in a fixed path adjacent said auxiliary cam follower and having a cam surface with a series of scallops therein, said cam surface engaging said auxiliary cam follower, and means to move said cam bar to give said lever a succession of short oscillations and to release said cam bar at a time when the regular cam follower substantially engages the heel of the rotating cam.

JOHN A. JESSEN.

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