US3074120A - Slivers magnitude uniforming apparatus in drawing machines - Google Patents

Description

1963 SEISAKU HANEDA ETAL 3,074,120

SLIVERS MAGNITUDE UNIFORMING APPARATUS IN DRAWING MACHINES Filed April 5, 1960 2 Sheets-Sheet 1 S R 0 r. #6 w WM H M H S I E s MAM/mm ARM/1' 1963 SEISAKU HANEDA ETAL 7 SLIVERS MAGNITUDE UNIFORMING APPARATUS IN DRAWING MACHINES Filed April 5, 1960 2 Sheets-Sheet 2 II I? mum/roles trite SLIVERS IVEAGNETUDEUNIFONWWG APPARATUS This invention relates to sliver-measuring and correcting apparatus for-use in a drawing frame and the object of the invention is to provide meansfor automatically making slivers even in thickness during delivery.

With this-object-in-view,-the present "invention provides a sliver measuring and correcting apparatus, wherein a vertically movable bottom measuring roller for each sliver is attached to a bent lever and is pressed against a top measuring roller, lever means i provided to combine the displacements of a plurality of bottom measuring rollers in one average displacement, and an amplifier device is provided for operating a speed change device which changes the speed of rotation of the top measuring roller.

According to the present invention, the speed of rotation of a top measuring roller can be immediately and automatically adjusted to the average variation of thickness of slivers in a delivery so that they can be locally made even in their thickness and delivered to a spinning machine without a complicated structure being required.

Other and further objects of the present invention will become apparent from the following specification and claim taken together with the accompanying drawings in which there is shown the preferred embodiment of the sliver measuring and correcting apparatus according to the present invention.

FIG. 1 is a schematic elevation view of a sliver measuring and correcting apparatus embodying the present invention;

FIG. 2 is a right side elevation view of a part of FIG. 1; and

FIGS. 3, 4 and 5 are detailed plan views of parts of FIG. 2.

In FIG. 1 numerals 11, 12 and 13 indicate the first, the second and the third rollers in a drawing machine, respectively. A delivery consisting, for example, of three slivers as seen in FIG. 2, is fed by a delivery roller (not shown) through annular grooves 14 formed in a top measuring roller 15 and corresponding projections 16 on a plurality of bottom measuring rollers 17 and then drawn into the third, the second and the first rollers 13, 12 and 11 in order. Each roller of the plurality of bottom measuring rollers 17 is mounted on the end of one of three bent levers 18 respectively, which levers are sepa rately pivotally mounted on a fixed rod 19 at the lever knee, with the annular projections 16 being pressed into the grooves 14 by springs 20 one of which bears against each lever 18.

To the lower part of each lever 18 is attached an additional piece 21, hinging on a pin 22 and pressed by a spring 23 against the lever 18 so as to lie in a straight line therewith. In a guide frame 24 having a top and bottom plate (FIG 4), a supporting rod 25 bears on the center of a main lever 26 having thereon a second lever 27, against which lever 27 bear push rods 28 and 29 each at the same length away from the fulcrum of lever 27. A push rod 3% bears against the main lever 26 at a point twice the distance away from the supporting rod 25 as the fulcrum of the second lever. The levers 26 and 27 are guided between the top and bottom plates of frame 24. Rods 25 and 28-3t can be secured to the respective levers and slidably contacted with elements 2.1 and 38, or vice versa. As the other cndsofthe push rods 1 23, 29 andStl are kept in contact-withthe additional pieces 21 on levers 18, movements of the levers 18:.

are transmitted to the supporting rod 25, atthe same ratio.

The guide frame 24 is mounted on a vertically movable block 31 which has a rack 32 having .teeththereon slight-.

beam 34 is slidable along .aguide rod v36 fixed to the machine frame (not shown) bythe rotation and adjusting.

screw 37 engagedwith'beam 34 (FIG. 3.). Thetsupporttingrod '25Iis'supported against-an .arm. 3830f a bellcrank '39, of "which'th'e other arm is connected to a pin 41 of a servo motor 42 to amplify the leverage of the bell-crank 39'. The comparatively small force on the pin 41 operates a piston valve (not shown), causing a much greater force to act on the piston 43 of the servo motor 12, whereby the end of an arm 44 of a bell-crank 45 pivoted on fixed shaft 55 is moved vertically with greater force than that necessary to move the pin 41. On a rod 46 are fixed a lever 47 and a large right angled lever 48 connected to a shifting fork 4-9. Due to the action of the bell-crank 44 and the lever 47 on shaft 46, the lower end of the lever 48 moves laterally so as to shift a belt 50 on a conical drive pulley 51 and a conical driven pulley 52, the former of which is driven by a motor, and the latter of which drives the top measuring roller 15. Thus, the speed of rotation of the top measuring roller 15 is changed. An indicator 53 attached to the other arm of lever 48 indicates the displacement of the supporting rod 25 or of the bottom measuring roller 17.

Slivers a sent from a can (not shown) are delivered through trumpets 54 and between the guide grooves 14 in the top measuring roller 15 and the annular projections 16 on the bottom measuring rollers 17, and then are drawn out to the third rollers 13. When the slivers a have an uneven thickness, the bottom measuring rollers 17 are moved vertically, and the motions thereof are transmitted by the levers 18 to push the push rods 28, 29 andfili. The motions of these rods are combined at the same ratio in the guide frame 24, and push rod 25 moves the bell-crank 39' and changes the speed of rotation of the driven pulley 52 through the agency of the servo motor 42, the bell-crank 45, the levers 47 and 48, and the shifting fork 49. Thus when the thickness of slivers a is greater than that prescribed, the speed of rotation of the top measuring roller 15 decreases, and increases when the situation is the reverse, thereby regulating the local drawing rate to make the slivers even in their thickness. When the general thickness of the slivers varies, the height of the slidable block 31 must be adjusted to it in order to balance the leverage of the bellcra-nk 39' with that of the levers 18, which is varied according to the variation of the gap between the measuring rollers 15 and 17. The lower end of the additional piece 21 is at an angle to accommodate to this adjustment.

It is thought that the invention and its advantages will be understood from the foregoing description and it is apparent that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the form hereinbefore described and illustrated in the drawings, said form being merely a preferred embodiment thereof.

We claim:

A sliver measuring and correcting apparatus for use with a drawing frame, comprising a driven measuring roller, a movable measuring roller mounted for movement toward and away from said driven roller, one of said rollers having at least one groove therein and the other of said rollers having at least one projection there- Patented Jan. 22,,19$3

on which engages in said groove, a variable driven means connected to said driven roller and driving said driven roller, and an amplifier means connected to said movable roller for amplifying the movement of said movable roller and to said variable driving means and the speed of which variable driving means is varied by said amplifier means according to the movement of said movable roller, said amplifier means being adjustable and comprising a lever on which said movable roller is mounted,

the free end of said lever having a slanted surface thereon, a motion transmitting rod slidably engaged with said slanting surface, servo means to which said rod is connected for actuating said servo means, said servo means being connected to said variable driving means, a movable housing in which said motion transmitting rod is slidable, a rack on said housing projecting away from said housing at an angle to said slanted surface, said rack having teeth thereon inclined at an angle to the length of said rack, and a beam slidably transversely of said rack and having teeth thereon inclined to the direction of the length of said beam and meshing with the teeth on said rack, whereby movement of said beam causes movement of said rack and housing and causes said rod to slide along the slanted surface of said lever.

References fired in the file of this patent UNITED STATES PATENTS 786,242 Westcott et al Mar. 28, 1905 884,442 Westcott et a1. Apr. 14, 1908 887,280 Smith May 12, 1908 887,281 Smith May 12, 1908 2,891,287 Raper June 23, 1959 FQREIGN PATENTS 711,501 Great Britain July 7, 1954

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