Patent Publication Number: US-3874033-A

Title: Trumpet

Description:
United States Patent [191 Duncan Apr. 1, 1975 TRUMPET [75] Inventor: Raymond E. Duncan, Union, SC.  
 [73] Assignee: Deering Milliken Research Corporation, Spartanburg, SC.  
 [22] Filed: Nov. 2, 1970 [21] Appl. No.: 85,927  
 [52] US. Cl. 19/288 [51] Int. Cl D0111 5/72 [58] Field of Search 19/288, 150, 292, 291,  
 [56] References Cited UNITED STATES PATENTS 1,870,095 8/1932 Casablancas 19/292 X 3,133,320 5/1964 Swanson 19/288 FOREIGN PATENTS OR APPLICATIONS 199,723 3/1968 U.S.S.R 19/288 682,208 11/1952 .United Kingdom 19/291 Primary Examiner-Dorsey Newton Attorney, Agent, or FirmEarle R. Marden; H. William Petry [57] ABSTRACT An improved trumpet for a spinning frame which is designed to provide an area for the passage of roving which incrementally increases in width to allow slubs, etc., to pass through without breaking the roving or stretching it.  
 1 Claim, 2 Drawing Figures PMENTEU APR 1 S III III) 24 X ill &#39; INVENTOR. RAYMOND E. DUNCAN ATTORNEY TRUMPET ln 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.  
  The bell-shaped trumpets normally have a fixed size opening for the particular desired yarn and therefore, tends to break the roving when there is a slub, trash, etc., in the roving which will not pass through the trumpet opening. If it does not break it will partially stop up which will put stretch in the roving and this causes uneven yarn.  
  It is therefore an object of the invention to provide a trumpet which will allow roving which may have slubs, etc., therein to pass therethrough without breaking or stretching.  
  Other objects and advantages of the invention will become readily apparent as the specification proceeds to describe the invention with reference to the accompanying drawings, in which:  
  FIG. 1 is a schematic side elevation view of the principal elements of a spinning frame, and  
  FIG. 2 is a front view of the new and improved trumpet taken on line 2-2 of FIG. 1.  
  In FIG. 1 there is shown, diagrammatically, the essential elements of a 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, such as package 12 of roving rotatably suspended from the frame 14. From the package 12 the roving 11 is led over a roving bar 16 and thence downwardly through the trumpet 18 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 26 rotate faster than the middle rolls 24; hence the fibers of the roving are drafted. The roving 11 after leaving the trumpet l8, proceeds through the drafting rolls along parallel paths until it leaves the bite of the front rolls 26. Then it enters the twisting system, indicated generally at 30, and then is twisted in customary fashion and wound on the spindle of the twisting system.  
  FIG. 2&#39;shows the trumpet 18 in greater detail to illustrate the principles of the invention. The trumpet 18 is generally triangular in shape with an indented portion 32 to accommodate a bolt 34 which secures the trumpet to the traverse bar 20. In normal operation the roving 11 runs through the upper portion 36 of the trumpet but will move down in a lower position if a slub, lint, etc., is encountered by the trumpet. The trumpet is designed to allow the roving to seek its own position in accordance with the size of the roving and to this end the sides 38 and 40 of the trumpet diverge outwardly in the down direction to provide the triangular shaped trumpet shown.  
  In the preferred form of the invention the trumpet is substantially flat and is molded from a friction resistant plastic like material to provide a substantially frictionless surface for the roving to run over.  
  It is obvious that a trumpet is provided which will compensate for sudden increases in the roving diameter without breaking the roving and causing an ends down.  
  I have described the preferred embodiment of the invention but it should be understood that the invention is capable of alteration without departing from the spirit of the invention and therefore, I desire to be limited only by the claim.  
 That which is claimed is:  
  1. A roving guide for a spinning frame comprising: a generally triangular shaped flat body member molded from a friction resistant plastic like material having an opening therethrough, said opening being formed by two side walls which diverge from the apex of said body member and a third wall interconnecting said diverging walls and having a portion thereof bowing upwardly toward the apex of said body member.