US3606751A

US3606751A - Casing for twisting spindles

Info

Publication number: US3606751A
Application number: US819711A
Authority: US
Inventors: Heinrich Peter Weller; Josef Mehl
Original assignee: Individual
Current assignee: Individual
Priority date: 1968-04-26
Filing date: 1969-04-28
Publication date: 1971-09-21
Anticipated expiration: 1988-09-21
Also published as: FR2007009A1; DE1760270A1; CH492040A

Abstract

VERTICAL SIDE PLATES ARE ARRANGED BETWEEN ADJACENT PAIRS OF TWISTING SPINDLES TO SEPARATE THEM, AND EXTENDING ACROSS THE FRONT OF EACH SPINDLE BETWEEN SIDE PLATES IS A DOOR THAT IS CYLINDRICALLY CURVED, AND ALSO CONICALLY TAPERED AT THE BOTTOM, TO FOLLOW THE CONTOUR OF THE THREAD BALLOON. THE DOOR IS HINGED AT ONE EDGE FOR HORIZONTAL SWINGING MOVEMENT, AND AN ARM ON THE PIVOT SHAFT IS CONNECTED TO ONE END OF A BOWED SPRING THAT PASSES OVER-CENTER TO EXERT A FORCE TENDING TO HOLD THE DOOR EITHER OPEN OR CLOSED. ANOTHER ARM ON THE PIVOT SHAFT IS CONNECTED BY

LINKAGE TO A BRAKE-ACTUATING ARM THAT BRAKES THE SPINDLE WHEN THE DOOR IS OPENED.

Description

Sept. 21,1971

Filed April 28. 1969 H. P. WELLER ETAL CASING FOR TWISTING SPINDLES 2 Sheets-Shoat 1 O! 1 Q h INVENTORS JOSEF MEHL H. P. WELLER ETA!- 3,505,751

CASING FOR TWISTING SPINDLES Sept. 21,1971

2 Sheets-Sheet 2 Filed April" 28. 1969 fifwe/cl-l PETER h/L'LLEB JOJEF MEHL United States Patent 01 fice Patented Sept. 21, 1971 3,606,751 CASING FOR TWISTING SPINDLES Heinrich Peter Weller, 63 Beethovenstrasse, 405 Monchen-Gladbach, Germany, and Josef Mehl, 18 Schillerstrasse, 5144 Wegberg, Germany Filed Apr. 28, 1969, Ser. No. 819,711 Claims priority, application Germany, Apr. 26, 1968, P 17 60 270.9 Int. Cl. D01h 1/24, J/42, 7/18 US. Cl. 57-88 4 Claims ABSTRACT OF THE DISCLOSURE Vertical side plates are arranged between adjacent pairs of twisting spindles to separate them, and extending across the front of each spindle between side plates is a door that is cylindrically curved, and also conically tapered at the bottom, to follow the contour of the thread balloon. The door is hinged at one edge for horizontal swinging movement, and an arm on the pivot shaft is connected to one end of a. bowed spring that passes over-center to exert a force tending to hold the door either open or closed. Another arm on the pivot shaft is connected by linkage to a brake-actuating arm that brakes the spindle when the door is opened.

BACKGROUND OF THE INVENTION The present invention relates to a casing, or enclosure, particularly designed for use with a plurality of twisting spindles arranged side by side on a spindle rail to form a part of a twisting machine.

As is well-known in the art, there is considerable air movement created around double-cord twisting spindles, due to the high rotational velocity of the so-called thread balloons revolving around the spindles. Where there is a plurality of spindles arranged side by side on a spindle rail, the draft thus created by each thread balloon has an adverse, interfering effect on the thread balloons of the adjacent spindles. To eliminate this mutually adverse effect of each spindle with respect to the others, it has heretofore been the practice to provide side plates between adjacent pairs of spindles, and these side plates deflect the draft partly to the front, i.e., the operating side, and partly to the rear of the spindle rail. However, this arrangement has one very serious disadvantage, in that the draft on the operating side is barely tolerable by the operating personnel, who are exposed to it.

It has been proposed to eliminate this disadvantage by enclosing each spindle in a ring-shaped casing having the form of a longitudinally slotted cylinder. The oblong slot is provided for the operation of the spindle. Apart from the fact that the operation of the spindle becomes cumbersome when enclosed within a cylindrical casing, one objectionable feature of this arrangement is that an intermittent stress is exerted by the thread balloon on the oblong slot, since the ring-shaped casing also serves in this embodiment as a balloon limiter.

SUMMARY OF THE INVENTION The primary object of the invention, therefore, is to provide a new and improved enclosure for a double-cord twisting spindle, which provides complete protection from the draft created by the thread balloons for personnel on the operating side of the spindle rail, while at the same time the air currents produced during operation of the machine are confined and conducted away to the rear of the spindle rail, where it is harmlessly dissipated. This object is achieved by providing a door on the front side (i.e., the operating side) of each twisting spindle, which is preferably curved cylindrically in the direction of rotation of the spindle and conically tapered in its lower part to ensure a smooth flow of air. In this way, a suction effect is created during rotation of the spindles, so that the resulting draft is led upward to the rear.

Another object of the invention is to provide an enclosure of the class described, in which the door is operatively connected to a brake mechanism, so that the respective twisting spindle is braked when the door is opened.

Another feature of the invention is the provision of a spring holding mechanism connected to the door which operates automatically, when the door is opened, to hold it open, and which also operates when the door is closed, to press it firmly against a stop. In the preferred embodiment of the invention, the said spring holding mechanism takes the form of a leaf spring which is fixedly mounted at one end, and the other end of which is connected to the pivot shaft of the door at a distance radially outward from its axis of rotation such that as the door swings from open to closed position, or vice versa, the spring is compressed until its free end passes over-center with respect to the other end of the spring and the axis of said pivot shaft, at which point the spring exerts a pressure on the door tending to hold it in the new position.

These and other objects and advantages of the invention will become apparent to those skilled in the art from the following detailed description of the preferred embodiment thereof, taken with the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view, showing several twisting spindles mounted on a spindle rail and embodying the casing of the invention; and

FIG. 2 is a plan view of the same.

DESCRIPTION OF THE PREFERRED EMBODIMENT Mounted side by side on a spindle rail 1 are several twisting spindles 2, each of which is driven by a belt drive 3. Likewise arranged on the spindle rail are holders 4, which support fiat separating plates 5 extending vertically between the individual spindles 3. Rotatably mounted in each of the holders 4 is a pivot shaft 7, to which a door 6 is attached. The door 6 has its upper portion cylindri-cally curved so as to generally follow the contour of the respective twisting spindle, and its lower portion is conically tapered, as shown.

Projecting radially from the lower portion of the pivot shaft 7 is a lever 8, which is connected by a linkage 9 and resilient arm 10 to a spindle brake actuating lever 11. The lever 11 actuates an expanding brake of the type shown and described in our co-pending application Ser. No. 813,894, filed Apr. 7, 1969, now abandoned, to which reference may be had.

Another lever arm 16 is fixed to the pivot shaft 7, and its outer end is connected by a bolt 12 to one end of a bowed leaf spring 13. The outer end of the leaf spring 13 is connected by a bolt 14 to a stationary support on the spindle rail 1, and bolt 14 is so positioned that the stress of spring 13 acts against lever arm 16, when the door is closed to the operating position I, to apply a torque to the pivot shaft 7 in the direction causing the door 6 to be pressed firmly against a fixed stop 15 on the next adjacent holder 4. However, as the door is swung out to the open position II, bolt 12 passes over-center with respect to the bolt 14 and axis of the pivot shaft 7, causing an opposite torque to be applied to the shaft, thereby urging the door toward the fully opened position. Thus, the door is swung automatically to the open position and remains there until manually closed, once the bolt 14 has passed the aforesaid over-center position.

When the door 6 is opened, lever 8 is simultaneously swung in the clockwise direction, as viewed in FIG. 2,

pulling the linkage 9 with it and thereby pulling the arm 10 and lever 11. This actuates the spindle brake, so that the spindle 2 is stopped when the door is opened. The braking force can be regulated by adjusting the angular position of lever 8 on arm 7, which adjustment can be effected in any conventional way.

What is claimed is:

1. In a textile machine having a plurality of twisting spindles (2) arranged side by side on a spindle rail (1), said spindles being separated from one another by vertical separating plates (5) arranged on each side thereof, the improvement comprising a casing for confining the air draft created by the thread balloon revolving around each of the spindles, said casing consisting of a door (6) extending across the front side of each spindle from one of said separating plates to the other, said door being hinged on one side edge for horizontal swinging movement between open and closed positions, a spring holding mechanism (12, 13, 14, 16) connected to said door and operable to press the latter against a fixed stop (15) when the door is closed, said spring holding mechanism also exerting a spring pressure against the door in the direction to hold it open when the door has been opened beyond a predetermined point.

2. A casing for twisting spindles according to claim 1, further comprising a brake actuating lever operatively connected to said door for stopping the respective twisting spindle when the door is opened.

3. A casing for twisting spindles according to claim 1, wherein said spring holding mechanism (12, 13, 14, 15) includes a spring (13), one end of which is connected to a stationary point (14) on said spindle rail (1) and the other end of which is connected to a movable point (12) on a member (16) connected to said door (6) for pivotal movement therewith, said movable point (12) 4 being spaced radially from the pivot axis of said member and being positioned so that when said door is closed, said spring exerts a torque on the door tending to hold it closed.

4. A casing for twisting spindles according to claim 1, wherein said spring holding mechanism (12, 13, 14, 16) includes a bowed leaf spring (13), one end of which is connected to a stationary point (14) on said spindle rail (1) and the other end of which is connected to a movable point (12 on a member (16) connected to said door (6) for pivotal movement therewith, said movable point (12) being spaced radially from the pivot axis of said member and being positioned so that when said door is open or closed, said leaf spring exerts a torque on the door tending to hold it open or closed, respectively, said movable point (12) passing over-center with respect to said stationary point (14) and the pivot axis of said member (16) when said door is moved from said open to closed position, or vice versa.

References Cited UNITED STATES PATENTS 1,611,166 12/1926 Daniloff 57-108X 3,431,719 3/1969 Bell 57-108 FOREIGN PATENTS 1,137,277 1/1957 France 57-5833 1,306,955 9/1962 France 57108 958,189 5/1964 Great Britain 57108 1,013,067 12/1965 Great Britain 57108 JOHN PETRAKES, Primary Examiner US. Cl. X.R. 5758.83, 108