US1912072A - Roving frame - Google Patents

Description

May 30, 1933. G F ASER' AL 1,912,072

ROVING FRAME Filed Dec. 21 1952 3 Sheets-Sheet l 6 HG 37M May 30, 1933. G. FRASER r AL 1,912,072

ROVING FRAME Filed Dec. 21, 1932 s SheetsSheet 2 May 30, 1933. G. FRASER ET AL 1,912,072

ROVING FRAME Filed Dec. 21, 1932 3 Sheets-Sheet 3 hZ/enfi 2/5 1 Patented May 30, 1933 UNITED sTATEs PATENT oFFIcEf GORDON FRASER, NORMAN FRASER, AND Joint, FRASER, or ARBROAT'H, ANGUS,

. SCOTLAND novme FRAME Application filed December 21, 1932, Serial No 648,298,2and in'Great Britain January 14, 1932.

This invention relates to improvements in roving frames of the type used for jute in which the bobbins are positively driven by gearing and has for its object to provide an improved dofiring arrangement for such frames.

As is understood, in a jute roving frame the flyers are arranged in a double row including a front row and a rear row.

A roving frame constructedin accordance with the present invention is equipped with flyers suspended from driven spindles journalled in a fixed overhead rail and with a bobbin lifter rail adapted to be tilted about the axis of a bobbin-driving shaft extending longitudinally of the bobbin lifter rail intermediate the rows of bobbin-carrying spindles.

As is understood, in operative position the bobbin spindles are upright and aligned with the axes of rotation of the relative flyers.

The arrangement is such that, when the flyers are stopped in a given position, both rows of bobbins can be swung through the flyers to a forwardly inclined position in which the full bobbins can be readily doffed and replaced by empty bobbins.

Suitable power-driven or hand-driven inching apparatus may be provided for bringing the flyers to the correct position to permit passage of the bobbins in case the flyers should fail to stop in the correct position; or the correct positioning of the flyers may be effected by direct manipulation of one of the flyers, it being understood that, when one flyer is turned, all the other flyers are turned.

The gearing for driving the flyers may comprise spiral or bevel gears. The bobbins are differentially gear-controlled as in the usual jute roving frame.

According to a modified arrangement in which the bobbin spindles of each row are staggered relatively to the bobbin spindles of the other row, to enable the bobbins of the rear row to clear the front flyers when dofling, the bobbin lifter rail, in addition to being tiltable about the axis of the bobbin driving shaft, may be displaced axially of said shaft. The timing of the forward swing ofthe bobbin spindles may be controlled by a cam or the like'which ensures that the bobbins of the rear row clear the A front flyer legs. i

The invention is illustrated in the'accompanying drawings in which Fig. 1 is a transverse vertical section, Fig. 2 a fragmentary elevation at 180 to Fig. 1 drawn to a larger scale, and Fig. 3 a fragmentary plan View;

Fig. 4 is a fragmentary plan view showing a modification.

The roving frame shown in Figs. l 3 is equipped with a front row of flyers 1 and with a rear row of flyers 2, arranged in nonstaggered relation,and suspended from front and rear rowsiof spindles 3, 4, respectively, journalled in a fixed overhead rail 5. 6 de notes the bobbin lifter rail which. is adapted to be tilted about the axis of a horizontal bobbin driving shaft 7 between normal or operative position as shown in full lines in Fig. 1 in which front and rear rows of bobbin spindles 8, 9 upstanding from the rail 6 are disposed in coaxial relation, respectively, with the flyer spindles 3, 4: and the position shown in dotted lines in Fig. 1 and in full lines in Fig. 2 in which the bobbin spindles 8, 9 are inclined forwardly clear of theflyers .1, 2 to permit doffing and reloading.

For effecting tilting movements of the bobbin lifter rail 6 there is attached to said rail, concentric with the shaft 7 a toothed segment 10 (Fig. 2) meshing with a WOIIII. 11 on a shaft 12 journalled in the lifter bracket 6 and rotatable by means of a handwheel 13. p

14, 15 denotes the "bobbins which are positively driven from the shaft 7 through gearing of known form carried bythe rail '6 as shown best in Figs. 1 and 3, the bobbins be ing im'paled'onthe spindles 8, 9 which are carried by bobbin-drivers 16 presenting driving pegs 17 engageable by sockets. 18 in .the bases of the bobbins.

The flyer spindles 3, 4 are journalled in ball bearings 19, 20 and each flyer spindle carries a gear pinion 21 meshing with a gear pinion 22 on a flyer driving shaft 23.

When the frame is stopped prior to doffing, in case the arrested position of the flyers is such that the flyers obstruct tilting movement of the bobbins, the flyers must be rotated to clear the bobbins; the main drive to the shaft 23 being disconnected, the operative may correct the position of all of the flyers simultaneously by simple manual rotation of any one flyer. If the shaft 23 is belt driven, the drive may be disconnected by a simple-belt-shift operation.

In correcting the positions of the flyers prior to dofiing, the flyers are preferably rotated reversely so that sufiicient slack rove is withdrawn from the bobbins to allow the bobbins to be tilted forwardly into dofling position without straining the rove.. When the bobbins'are in dofiing position, each rove yarn is brokenlin the usual manner before the relative bobbin is doffed. p

.As will readily be understood, thefieon struction according to the invention permits the drawing roller indicated at 24.to be so located as to make the rove ends 25, 26 leading, respectively, to the front and rearfiyers, substantially equal. The importance of this feature will be appreciated by those skilled in the art.

While we have shown the bobbin spindles as being rotatable, it is to be understood that the bobbin spindles 8, 9 may be non-rotatable and act as carriers for the bobbins and the bobbin-drivers. V i

In the modification shown in Fig. 4 the bobbin spindles of each row are staggered relatively to the bobbin spindles of the other row, and, to enable the bobbins of therear row to clear the front fiyer legs when dotting, the bobbin lifter rail 6, in addition to being tiltable about the axis of the shaft 7, is adapted to be displaced axially of the shaft 7 whereby to permit the bobbins of the rear row to be swung forwardly through the legs of the front fiyers. To this end, there is fixed to the lifter rail 6 an upstanding follower pin 27 adapted, when the rail 6 is displaced endwise, to track a cam slot 28 presented by a bracket 29 fixed to the lifter bracket 6 and'overhanging the rail 6, the cam slot 28 being oblique to the axis of the shaft 7 so that endwise movement of "the rail 6 is accompanied by tilting movement of said rail 6. The rail 6 is provided with a segmental rack 30 concentric with the carrying spindles, and adapted to be tilted about the axis of said bobbin-driving shaft.

" 2. A roving frame as claimed in claim 1 in which the bobbinlifter rail is movable axially of the. bobbin-driving shaft. 3..Aroving frame as claimed in claim 1 having means for imparting tilting movement to the bobbin lifter rail, said means comprising a manually operable worm meshing with a toothed segment attached to the bobbin lifter rail. v

In testimony whereof we have signed our names to this specification.

. GORDON FRASER. NORMAN FRASER.

JOHN FRASER.

shaft 7 and engaged by a Worm 31 operable,

by means of a handwheel 32 and journalled in a bracket 33 carried by the lifter bracket 6 As will readily be understood, the construction is such that endwise movement imparted to the rail 6 by rotation of the handwheel 32 is accompanied by tilting movement of the rail 6 by virtue of thecircumstance that the pin 27 is constrained to track the cam slot 28.

Images