US3635258A

US3635258A - Stop motion drop wire

Info

Publication number: US3635258A
Application number: US51848A
Authority: US
Inventors: Robert H Powell
Original assignee: Milliken Research Corp
Current assignee: Deering Milliken Research Corp; Milliken Research Corp
Priority date: 1970-07-02
Filing date: 1970-07-02
Publication date: 1972-01-18
Anticipated expiration: 1989-01-18

Abstract

A drop wire which has its top portion securely held in a slot formed on the drop wire by attaching two metal strips thereto.

Description

[451 Jan. 18, 1972 References Cited [54] STOP MOTION DROP WIRE,

[72] Inventor: Robert H. Powell, Hartwell, Ga. UNITED STATES PATENTS Deerlng Milliken Research Corporation, Spartanburg, SC.

July 2, 1970 [21 AppLNol: 51,848

Weddington ..........................139/368 2,610,656 9/1952 Watson..................................139/368 [73] Assig'nee:

[22] Filed:

Primary Exqminerl-lenry S. J audon Attorney-Norman C. Armitage and H. William Petry ABSTRACT 51/26 A drop wire which has its top portion securely held in a slot 139/353 623 82 2 formed on the drop wire by attaching two metal strips thereto.

[52] U.S.Cl.... [5|] lnt.Cl. [58] FieldofSearch...................

1 Claims, 2 Drawing Figures PAIENIEnJm we INVENTOR. ROBERT H. POWELL ATTORNEY STOP MOTION DROP WIRE This invention relates to an improved drop wire for use in stop motion mechanisms in looms and although I have shown it in connection with the notched bar-type of stop motion, it is evident that this could be used in the electrical stop motion drop wire or in the older type of stop motion mechanism whereby when a drop wire is allowed to drop due to parting of a strand or lack of tension therein, an oscillating member fails to get its full swing and thus stops the loom.

In a loom there are sometimes several thousand warp threads in a sheet of warp and each thread runs through an individual drop wire and as long as each thread has proper tension thereon, the drop wire is held in elevated position and therefore cannot actuate the stop motion mechanism. Upon parting of a thread or strand or loss of tension therein for any reason which would cause imperfect weaving, the drop wire moves downwardly and stops the loom by any one of several stop motion mechanisms with which it is associated.

It is also known that from time to time drop wires become damaged such as by being broken or by having certain imperfections therein and it is quite a proposition to remove a broken drop wire because the entire drop wire assembly, that is the bars on which the drop wires are supported, has to be removed from the loom and all of the drop wires reinstalled in conventional, the U-shaped bar on each side thereof has order to install a new drop wire in the place of one which has become broken.

It is an object of the present invention to provide a drop wire which can easily be placed on the supporting bars of a stop motion mechanism without in any way disturbing the thousands of other drop wires already in installed position.

Some of the objects of the invention having been stated, other objects will appear as the description proceeds when taken in connection with the accompanying drawings, in which:

FIG. 1 is an isometric view of a portion of a certain type of drop wire assembly and bars and showing my invention applied thereto; and

FIG. 2 is an isometric elevation of the top portion of one of the drop wires.

Referring more specifically to the drawings, the numeral 10 indicates a portion of one side of the frame of a loom, the other side being identical but not shown.

This portion of the frame of the loom has a vertically disposed slot 11 therein in which is mounted a bar 12 which is U-shaped in cross section. The U-shaped bar is secured in position at each end thereof by any conventional means such as a screw or bolt 13. Oscillatably mounted in a channel in the U-shaped bar 12 is a sliding bar 14 which has an elongated slot 15 therein slidably penetrated by the bolt or screw 13. This bar 14 is associated with the stop motion mechanism and, as is notches 16 which are coinciding and the oscillating bar 14 has a plurality of notches 17. There are thousands of drop wires 20 mounted for vertical sliding movement on the

bars

12 and 14 and each of these drop wires has an elongated slot 21 which is of greater vertical height than the total vertical height of the

bars

12 and 14. These drop wires each have a hole or eye 23 therethrough through which a strand of warp 24 passes, only two of the many drop wires being shown.

In the conventional drop wires, the same are made from a flat piece of sheet steel with the slot 21 and hole 23 stamped therein providing two

side portions

25 and 26. In the present invention, one of the side portions, such as side portion 26, is severed as at 27 and being of spring steel, the side portion 26 can be moved sidewise to remove the drop wire from the

bars

12 and 14 and likewise a new drop wire can have its side por tion 26 sprung to insert the same in case one of the drop wires should be damaged. However, the main purpose of the present drop wire is to use it in association with conventional drop wires so that in case a conventional drop wire should have to be replaced, one of the improved drop wires can be placed instead, or all of the drop wires could be of the improved type shown in the drawings. The side portion 26 normally springs back into ali ment with the projectin portion 21} but in order to hol the same in alignment ere 18 provided two

metal strips

28 and 29 which are riveted or otherwise secured to the upper side portion 26 to provide a slot 30 therein to accommodate the upper end 31 of the side portion 26 to prevent the severed portions of the drop wire 20 from being bent and interferring with adjacent drop wires.

it is thus seen that I have provided a replaceable drop wire for stop motions in looms which can be quickly inserted in place of a damaged drop wire and thus saving a greater amount of labor and material in that a loom can quickly be placed again in operation after a defective drop wire occurs.

In the drawings and specification there has been set forth a preferred embodiment of the invention, and although specific terms are employed, they are used in a generic and descriptive sense only, and not for purposes of limitation, the scope of the invention being defined in the claims.

That which is claimed is:

l. A stop motion detector drop wire comprising a thin flat metal body having an elongated slot near one end and a centrally disposed eye through which a warp thread is adapted to be passed, one side of said metal body being severed into two portions, a first strip of material connected to one face of said two portions and a second strip of material connected to the other face of said portion to which said first strip of material is connected providing a slot to accommodate the other of said two portions.

Claims

1. A stop motion detector drop wire comprising a thin flat metal body having an elongated slot near one end and a centrally disposed eye through which a warp thread is adapted to be passed, one side of said metal body being severed into two portions, a first strip of material connected to one face of said two portions and a second strip of material connected to the other face of said portion to which said first strip of material is connected providing a slot to accommodate the other of said two portions.