US2458852A

US2458852A - Roll tension device

Info

Publication number: US2458852A
Application number: US673558A
Authority: US
Inventors: Sigurd H Helland
Original assignee: Whitin Machine Works Inc
Current assignee: Whitin Machine Works Inc
Priority date: 1946-05-31
Filing date: 1946-05-31
Publication date: 1949-01-11
Anticipated expiration: 1966-01-11

Description

Jan. 11, 1949. 5, HELLAND 2,458,852

ROLL TENSION DEVICE Filed May 51, 1946 2 Sheets-Sheet 1 INVENTOR.

ATTY

Jan. 11, 1949. s. H. HELLAND ROLL TENSION DEVICE 2 Sheets$heet 2 Filed May 51, 1946 Patented Jan. 11, 1949 ROLL TENSION DEVICE Sigurd H. Holland. Whitinsviiie, Mass., assignor to Whitin Machine Works, Whitinsvil a corporation of Massachusetts e, Mass.,

Application May 31, 1946, Serial No. 673,558

3 Claims.

. 1 This invention relates to combers and other similar machines in which textile fibers are drafted between tensioned drawing rolls.

It is the general object of my present invention to provide improvements in the devices for applying spring tension to the pairs of drawing rolls, and to provide an improved construction for relieving such tension when desired.

To the accomplishment of these objects, I provide improved means for separately supporting and guiding the springs which apply tension to each top drawing roll. and I also provide improved means for applying a lifting and pressurerelieving force to the collective tension devices of a set of drawing rolls.

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

A preferred form of the invention in the drawings in which Fig. 1 is a sectional side elevation of a set of drawing rolls having my improvements applied thereto;

Fig. 2 is a. detail sectional end elevation, taken along the line 2-4 in Fig. 1;

Fig. 3 is a sectional front elevation, the line 3-3 in Fig. 1; and

Fig. 4 is a partial sectional view,

is shown taken along similar to Fig. 3 but showing the parts in a different operative relation.

Referring to the drawings, I have shown parts of a commercial comber comprising a frame Ill on which a box-like casing I I is secured by bolts l2. Side rails I 4 are mounted on the casing l2 and are secured thereto by bolts IS. The upper surfaces 'of the rails l4 are grooved longitudinally as shown at IS in Fig. 3 to receive and guide the bearing boxes in which the bottom rolls B are rotatably mounted and in which the bearings 22 for the top rolls R are vertically adjustable. The rails l4 are longitudinally slotted to receive bolts 24 by which the bearing boxes 20 are held in desired spaced relation along the rails l4.

A cross bar is provided for each pair of drawing rolls and is provided with end openings 3! (Fig. 3) to receive the bolts 24 which thus act to clamp both a bearing box 20 and an associated cross bar 30 to a side rail I4. Correct relative alignment of these parts is thus maintained.

Tension is applied to each top roll R by springs S acting through rods and links 4|. Each rod 40 extends downward loosely through a guidesleeve 44, and receives the downward spring pressure againsta washer and collar 46, the

2 spring tension devices being of the usual construction. At its upper end, each sleeve 44 engages a cross bar 30, and each rod 40 extends through a longitudinal slot 48 in said cross bar. A cross arm 50.15 mounted above each cross bar 30 and is slotted at its ends to receive the spring-tensioned rods 40. Washers 5% on the rods 40 engage the upperend surfaces of the cross bar. 50. A stud 54 is fixed at the middle of each cross arm 50 and extends freely downward through a, guide-opening in a lug 55 formed on the under side of the associated cross-bar 30.

The studs 54 for a full set of drawing rolls all engage the upper side of a shelf which is pivoted at 5| to the ends of the casing II. A cam shaft (Fig. 1) is mounted in bearings'in the casing I! and is provided with eccentrics 66 which engage the under side of the shelf 60. A handle Ill at one end of the cam shaft 65 provides for convenient manual operation thereof.

By shifting the eccentrics 66 from the inoperative position shown in Fig. 3 to the operative position shown in Fig. 4, the spring tension on all of the top rolls R of a set of drawing rolls may be simultaneously relieved, which is desirable when top rolls having cushioned surfaces are to be inoperative for a considerable period.

The provision of a cross bar 30 and cross arm 50 for each pair of drawing rolls, and the provision of means for holding these parts in accurate alignment with the corresponding roll bearing boxes permit convenient transverse adjustment of the drawing rolls to meet drafting conditions, while at the same time the associated tension devices are maintained in accurate alignment.

The provision of the swinging shelf between the eccentrics 66 and the studs 54 permits application of a more directly vertical relieving pressure to the studs 54, so that any tendency to bind is avoided.

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 drawing mechanism having pairs of drawing rolls, bearing boxes for said rolls and side rails along which said boxes are adjustable, in combination, a cross bar for each pair of draw- ,ing rolls, a bolt extending through each end of eachcross bar and through the adjacent side rail and into the adjacent bearing box and clamping said three parts together, with said cross bar and said bearing box in permanent assembled alignment, and spring tensioning means for each pair 55 of rolls positioned and guided y the associated erable to relieve the spring tension on the asso- 10 ciated top roll, a guiding stud in said cross arm slidable in said cross bar, and means to engage said stud and lift said cross arm to relieve the spring tension.

3. The combination in a drawing mechanism as set forth in claim 2, and in which the lifting means comprises a sheli pivoted to swing about a laterally oflset horizontal axis and engaging the lower ends of a plurality of said studs, and cam means to raise said shelf.

SIGURD H. HELLAND.

REFERENCES CITED The following references are or record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,177,929 mmbert Oct. 31, 1939 2,307,670 Cunningham Jan. 5, 1943 15 2,412,357 Robinson Dec. 10, 1946