US3133320A

US3133320A - Trumpet for a spinning frame

Info

Publication number: US3133320A
Application number: US216192A
Authority: US
Inventors: Kenneth P Swanson
Original assignee: Progressive Technologies Inc
Current assignee: Azenta Inc
Priority date: 1962-08-10
Filing date: 1962-08-10
Publication date: 1964-05-19
Anticipated expiration: 1981-05-19

Description

y 1964 K. P. SWANSON TRUM ET FOR A SPINNING FRAME 3 Sheets-Sheet 1 Filed Aug. 10, 1962 INVENTOR KENNETH R SWANSON BY Aim b.

ATTORNEYS y 1954 K. P. SWANSON TRUMPET FOR A SPINNING FRAME 3 Sheets-Sheet 2 Filed Aug. 10, 1962 INVENTOR.

KENNETH P. SWANSON ATTORNEYS y 1964 K. P. swANsoN 3,133,320

TRUMPET FOR A SPINNING FRAME Filed Aug. 10, 1962 3 vSheets-Sheet 3 INVENTOR. KENNETH R SWANSON WW. NM

ATTORNEYS United States Patent 3,133,320 TRUIVEET FOR A SPINNING FRAME Kenneth P. Swanson, Abington, Mass., assignor to Progressive Engineering, Inc., Rockland, Mass, a corporation of Massachusetts Filed Aug. 10, 1%2, Ser. No. 216,192 1 Claim. (Cl. 19-288) My invention relates to a trumpet for a spinning frame. This application is a continuation-in-part of my prior United States patent application Serial No. 112,600 filed May 25, 1961, now abandoned, for Trumpet for a Spinning Frame.

In customary practice, a strand of roving is led from a rotatably mounted spindle or package, over a roving bar, and through a bell-shaped trumpet disposed in correct position behind the drafting rolls of a spinning frame, the purpose of the trumpet being to locate the roving accurately and precisely with respect to the drafting rolls so that the roving will enter the bite of the rolls at the correct point and in a straight run.

It has been found that yarn of improved strength and uniformity may be produced by running two rovings separately through the same set of drafting rolls and then combining them as they enter the twisting system. To achieve that end, others have provided trumpets with completely separated holes for the passage of the rovings, but such trumpets have notfound favor in the mills. When one of the rovings breaks, the operator must reeve the end through the proper hole in the trumpet, and it is not only ditficult to find the correct hole, but easy to break the other roving in the course of fumbling to find the hole.

The principal object of my invention is to improve the eflicienty of double roving spinning.

Another object of my invention is to reduce the length of time required to restore a double roving system to operation after the breaking of a roving.

It is a further object of my invention to provide a trumpet for a spinning frame which may be used interchangeably in applications in which the package is disposed either above or below the longitudinal axis of the trumpet.

An important feature of my invention resides in a trumpet having a single passage and a rib disposed in at least one surface of the passage to divide the passage into a pair of connected, generally U-shaped, apertures.

It is an important feature of my invention, in an alternative embodiment thereof, that a pair of opposed ribs are disposed in a trumpet having a single passage, the opposed ribs being oriented in such fashion that the trumpet will operate effectively with the package positioned either above or below its longitudinal axis.

I have found, in the preferred embodiment of my invention, that a double roving trumpet of the kind described oifers a great advantage. When one of the rovings breaks, the operator has merely to twist the broken end around the unbroken roving, behind the trumpet; thereupon the unbroken roving carries the end through the trumpet and into the bite of the back drafting rolls. When the rolls exert a pull on the broken end, the two rovings then automatically separate, because of the action of the rib, and the two rovings once more pass in parallel paths through the drafting rolls.

The nature of the invention will be more readily under- "ice stood and appreciated from the following detailed description of a preferred and an alternative embodiment thereof, selected for purposes of illustration and shown in the accompanying drawings, in which:

FIG. 1 is a schematic plan view of the ments of a spinning frame;

FIG. 2 is a similar view in side elevation;

FIG. 3 is a view in side elevation of a trumpet constructed in accordance with the invention;

FIG. 4 is a view in end elevation of the trumpet;

FIG. 5 is a view in vertical cross-section upon an enlarged scale;

FIG. 6 is a view in end elevation to the same enlarged scale;

FIG. 7 is a View in rear end elevation of an alternative embodiment of the trumpet;

FIG. 8 is a view in front end elevation of the alternative embodiment of the trumpet;

FIG. 9 is a view of the alternative embodiment of the trumpet in vertical cross-section upon an enlarged scale; and

FIG. 10 is a view in end elevation of the alternative embodiment of the trumpet to the same enlarged scale.

In FIGS. 1 and 2 there are shown, diagrammatically, the essential elements of spinning frame with which a trumpet constructed in accordance with the invention is particularly useful. A creel includes a frame or support 14 from which a number of rolls or packages of roving depend; as shown in FIG. 2, a pair of

packages

14 and 12 of roving are rotatably suspended from the frame 14. From the

packages

12 and 14 the rovings 11 and 13 are led over a roving bar 16 and thence downwardly through the trumpet 13 which is mounted on a transverse bar 20 disposed behind the drafting rolls. Customarily, three pairs of drafting rolls are employed, a pair of back rolls 22, a pair of middle rolls 24, and a pair of front rolls 26. The middle rolls 24 rotate faster than the back rolls 22, and the front rolls 25 rotate faster than the middle rolls 24; hence the fibers of the roving are drafted. The rovings 11 and 13, after leaving the trumpet 18, proceed through the drafting rolls along parallel paths until they leave the bite of the front rolls 26. Then they enter the twisting system, indicated generally at 30, and then combine into principal elea single roving 15, which is twisted in customary fashion and wound on the spindle of the twisting system.

The trumpet per se is illustrated in a preferred embodiment in FIGS. 3-6 inclusive. The trumpetof FIGS. 3-6 inclusive is intended for use in systems substantially similar to that illustrated in FIGS. 1 and 2 in which the pack age is located above the longitudinal center line of the trumpet. In FIGS. 3 and 4 the trumpet is shown approximately at full scale and the trumpet is shown on a much enlarged scale in FIGS. 5 and 6. The nature of the trumpet is such as to lend itself to fabrication by singleshot injection molding of a plastic such as polystyrene, suitably plasticized polyvinyl chloride, nylon, or other conventional plastic customarily employed in injection molding. The material is not, however, critical; the trumpet may be formed as a metal stamping.

trumpet is shown in FIGS. 1 and 2 in which the trumpet is secured in upstanding relation to the bar 20. The upper portion of the bar or plate 40 merges smoothly into a bell-shaped member 44 provided with a through and through passage having a flared mouth 45 leading to a discharge orifice 48 of lesser dimension than the flared mouth. Molded into the upper portion of the aperture formed in the bell-shaped member 44 is a. rib 5t originating in the upper surface of the flared mouth 46 and increasing in vertical dimension as it passes to the rear of the orifice 48. The rib 50 is approximately triangular in cross-section with an apex pointed downwardly. The presence of the rib produces a heart-shaped aperture through the bell-shaped member 44 and provides a pair of parallel grooves or passages in the upper portion of the aperture. Incidentally, it will be understood that the bellshape of the member 44 is convenient from the standpoint of molding efficiency and appearance, but the exterior shape of the member is not functionally important to the operation of the trumpet; the trumpet could be carved from a cubical block, for example.

The trumpet is generally indicated by the reference character 13 and is shown in FIGS. 1 and 2 as mounted on the bar 20 in upstanding relation between the back drafting rolls 22 and the roving bar 16. When the spinning frame is to be operated, the rovings 11 and 13 may be twisted together by the operator and passed through the trumpet into the grip of the back rolls 22 and then led forwardly through the other pairs of rolls and downwardly into the twisting system. When the frame is then started it will be found that the rovings 11 and 13 are automatically separated by the action of the rib 39 and thereafter pass through the drafting rolls in parallel paths, as shown in FIG. 1. The two rovings are then combined into one roving 15 just prior to entry of the roving into the twisting system. It might be thought that the two rovings would be apt to pass together through the trumpet on one side or the other of the rib 50, but experience has shown that such a condition will not occur, since the rib invariably causes and maintains the desired separation between the rovings 11 and 13. As a test, the two rovings have been deliberately started through the trumpet on the same side of the rib 50, but the separation takes place automatically and at once.

It has been found in the textile mills that the operators of the spinning frames simply will not take the trouble to reeve the rovings through the separate holes of a double trumpet. To do so requires extended reaching and inevitable fumbling in the course of trying to introduce the end of the limp roving through one of a separate pair of holes in a conventional double trumpet. There is, however, no similar problem involved when the trumpet constructed in accordance with my invention is employed. When one of the rovings breaks, it is merely necessary for the operator to take the end of the broken roving and twist it around the unbroken roving, behind the trumpet. The unbroken roving will then carry the end of the broken roving through the trumpet and into the drafting rolls, whereupon the two rovings will separate as soon as the broken roving is pulled by the drafting rolls. The result is that the efliciency of doubleroving spinning is greatly increased and the objectives of double-roving spinning more easily and cheaply achieved.

Turning now to FIGS. 7 through 10 inclusive, an alternative embodiment of my invention is disclosed. In the embodiment of FIGS. 3 through 6 inclusive the trumpet disclosed is intended for use where the package or spindles of roving 10 and 12 are located above the cross bar 20 on which the trumpet 14 is mounted. In the preferred embodiment it is therefore only necessary to provide a rib 50 located in the uppermost portion of the trumpet 18. Since the roving will enter the trumpet 18 and will be drawn against the uppermost surface thereof, as seen in FIG. 2, the rib 5t will function properly to produce the desired results of my invention.

On occasion it is desired to mount the trumpet 18 in depending relation to the cross bar 20 or, alternatively, to draw the roving from below the cross bar 20. It will be observed that under such conditions the rib 50 of the preferred embodiment will not operate to separate the two strands of rovings 11 and 13 since the rib 50 will be positioned on the face of the trumpet 18 opposite to the face against which the roving will bear as it enters the trumpet. In the alternative embodiment of FIGS. 7 through 10 a trumpet is disclosed having an opposed rib construction whereby the roving may be introduced to the trumpet from either above or below the longitudinal center line thereof.

In FIG. 7 a trumpet, indicated generally at 60, is shown having the general outline of the trumpet of the preferred embodiment. As before, the lower portion of the trumpet 60 is formed as a bar or plate 62 having a central aperture 64 whereby it may be attached to the cross bar 20 of the spinning frame. The upper portion of the bar or plate 62 merges smoothly into a bell-shaped member 66 provided with a through-and-through passage having a flared mouth 63 leading to a discharge orifice '70 of lesser dimension than the flared mouth 68. Molded into the upper portion of the aperture formed in the bell-shaped member 66 is a depending rib 72 originating in the upper surface of the flared mouth 68 and increasing in vertical dimension as it passes to the rear of the orifice 70. Molded into the lower portion of the aperture 68 formed in the bell-shaped member 66 is an upstanding rib 74 originating in the lower surface of the flared mouth 68 and increasing in vertical dimension as it passes to the rear of the orifice 70.

It will be noted that the depending rib 72 and the upstandingrib 74 are each of a vertical dimension slightly greater than one half the vertical dimension of the passage through the trumpet 18 from approximately one half the way through the passage to the discharge orifice 70, as seen most clearly in the enlarged sectional view of FIG. 9. This vertical dimension is desirable in order to insure that the tangled strands of roving will separate properly. In order to prevent the passage through the trumpet 18 from being divided into parallel discrete passages by the

ribs

72 and 74, they are given respectively a slight inclination from the vertical away from each other. As will be seen in FIG. 10, the rib 72 is inclined slightly to the left of the vertical and rib 74 is inclined slightly to the right of the vertical. The combined angles of inclination should be suflicient to produce a passage, indicated generally at 76 in FIG. 10, of sufiicient width to easily admit at least one strand of roving between the

ribs

72 and 74.

It will be noted that in the alternative embodiment of my invention a pair of parallel grooves or passages are provided in both the upper portion and in the lower portion of the aperture. It is thus possible to use the trumpet of the alternative embodiment on a spinning frame in which the spindles of roving are located either above or' below the longitudinal center line of the passage through the trumpet.

As in the preferred embodiment, when one strand of roving breaks it remains only necessary to wrap the broken strand of roving about the intact strand and to continue operation of the spinning frame. The intact strand of roving will carry the end of the broken strand through the trumpet 18, and by operation of the

rib

72 or 74 as the case may be, the broken strand of roving will be transferred through the passage 76 to the proper groove and aligned for entry into the drafting rolls.

Having thus disclosed my invention, in both a preferred and an alternative embodiment thereof, what I claim as new and desire to secure by Letters Patent of the United States is:

A spinning frame trumpet comprising a member, means at the bottom of the member for supporting the member in vertical position, said member having a horizontal 55 through-and-through hole flared at one end, a first rib disposed in the upper surface of said hole and depending more than 50% of the distance between the upper and lower surfaces of the hole, a second rib disposed in the lower surface of the hole and extending upward more 5 than 50% of the distance between the upper md lower surfaces of said hole, said first and second ribs being inclined away from each other to define a cross-over passage between said ribs, said ribs serving to divide the upper and lower portions of the hole into pairs of parallel 10 ribs.

References Cited in the file of this patent UNITED STATES PATENTS Martin July 2, 1940 Noguera July 2, 1957 FOREIGN PATENTS Great Britain Nov. 12, 1928 Great Britain Nov. 18, 1949