US2045697A - Drawing mechanism for textile rovings - Google Patents

Description

June 30,1936. F, CASABLA-NCAS 2,045,697

DRAWING MECHANISM FOR TEXTILE ROVINGS 4 Sheets-Sheet l Filed Aug. 20, 1952 June 30, 1936. I

DRAWING MECHANISM FOR TEXTILE ROVINGS F. cAsABLANcAs 2,045,697

4 Sheets-Sheet 2 Filed Aug. 20, 1932 F. CASABLANCAS DRAWING MECHANISM FOR TEXTILE ROVINGS Filed Ailg. 20, 1952 4 Sheets-Sheet 3 June 3%, 1936. CASABLANCAS I 2,045,697

DRAWING MECHANISM FOR TEXTILE ROVINGS Filed Aug. 20, 1932 4 Sheets-Sheet 4 Patented June 30, 1936 UNITED STATES ATENT OFF! E Fernando Oasablancas, Sabadell, Spain Application August 20,

1932, Serial No. 629,711

In Spain December 23, 1931 4 Claims.

This invention relates to an improvement in or modification of the invention disclosed in my Patent No. 1,760,745 which relates to a mecha- "nism for drawing textile roving, and refers especially to a pressure saddle or member that rests upon two back rollers and which can be combined with a supplementary saddle in order to also rest upon a pair or pairs of front rollers.

The present invention refers to the method of transmitting to this pressure saddle the pressure it has to exert on the rollers, and consists in the placing under the drawing mechanismbut at a convenient distance from the table or frame on which the drawing devices are mountedof a cross-shaft that extends through the entire machine, and to which is connected immediately under each drawing mechanism, either a spring acting directly on a link rod articulated to the saddle or a lever jointed also to a link rod on the free end of which a weight or spring is caused to act.

By this improvement one obtains the transmission of pressure to the pressure saddle without the top face of the frame or table that carries the drawing devices being in any way encumbered by the mechanism which transmits the pressure, .and especially without the lower circular brushes becoming enclosed between the threads and the pressure rods. This device makes it not only easier for one to clean the said table, but also permits one to effect with greater facility the control of the lower circular brushes, which in ordinary mechanisms with pressure by levers are somewhat difficult to withdraw and very often cause the 35 breakage of the threads when they are withdrawn from the machine.

This improvement can also be applied when a compound pressure saddle is used which transmits the pressure simultaneously to the pairs of 40 back and front rollers according to Figures 1 and 2 of the former patent, as well as when the pressure saddle transmits the pressure only to the back rollers and the pair of drawing or front rollers is weighted by direct pressure through a link rod as represented in Figure 3 of the former patent.

On the accompanying drawings different examples are represented of the application of the improvement, according to the present invention 50 and applied to the apparatus described in the former patent. To simplify the drawings, the views comprise only those parts of the drawing mechanism necessary for the comprehension of the improvement.

Figure l is a section of a drawing mechanism with a pressure saddle that weights simultaneously all the pairs of cylinders, and in which a spring is used to transmit pressure to the saddle.

Figure 2 represents a similar mechanism, in which instead of a spring, a lever with a weight is used to weight the rollers.

Figures 3 and 4 represent a transverse section of drawing mechanism in which the saddle weights only the two back pairs of rollers while the front pair is weighted by direct pressure through a curved bar as is usually done. In Figure 3 the pressure that is transmitted to the pressure saddle is produced by a spring, and in Figure 4 by a lever with a weight.

In all the figures of the drawings, the mechanism comprises one pair of feed rollers, I and 2, one pair of middle rollers, 3 and 4, provided with endless belts, 1 and 8 to lead the roving, and one pair of drawing rollers 5 and 6. This mechanism is nevertheless only shown as an example, as the improvement according to the present invention can be applied as a general rule to all types of drawing mechanisms.

In the example shown in Figure 1, the pressure is exerted upon the three pairs of rollers at the same time, by means of a pressure saddle formed by a front part I 0 that weights the drawing roller 5 and a rear part I I that weights the rollers l. and 3. The part I 0 receives the pressure through the link rod 2| and transmits it to part II by means of a rod l3 which joins the two sides of the pressure saddle.

In accordance with the invention the link rod 2| is jointed to the saddle l0, and is coupled directly with a spring 42, which at its other ends is formed with a hook 43 that embraces a longitudinal bar 44 which extends across the width of the machine.

As can be seen in the drawings the bar 44 is placed higher than the ledge 46, so that the space free end carries a weight or mass 48, which exerts a tension on the link rod 2|. With this arrangement the top face of the ledge 46 remains completely uncumbered.

Figures 3 and 4 represent the application of the improvement to the case in which the two pairs of back rollers are weighted by the saddle H, which receives the pressure directly, while the drawing or front rollers are weighted with direct pressure by means of the curved rod 39, which as usual is articulated at its end with the draw bar 59, that passes through the ledge 46, and from which hangs a weight placed under the ledge.

In the arrangement according to Figure 3 the link rod 2!, which is articulated to the pressure saddle H, carries as in the case of Figure 1, a spring 42, whose lower hooked end 43 embraces the longitudinal bar 44.

A variation in Figure 4 shows a similar mechanism which only differs from that shown in Figure 3 in that the link rod 2!, is linked to a lever 41, which rests on the bar 44, and carries at its free end the weight 48, which exerts tension on the link rod 21.

With the improvements according to the present invention it is possible to eliminate the pressure rods that pass through the ledge 46, and which extend behind the lower circular brush 45 and thus facilitate the cleaning of the ledge 46 and further has the great advantage in that it allows the withdrawal with ease of the lower circular brushes 45, and without any danger of breaking the threads. In the usual arrangements the circular brushes 45, remain enclosed between the pressure bars on the rear side and the threads on the front side, so that to with.- draw a circular brush, it is imperative to separate by hand, one or more threads from their normal position, and to withdraw the circular brush in a slanting direction. As this operation takes place usually while the machine is working it may be realized how frequently breakage of the threads occurs.

Conversely, with the improvement after cletaching the circular brush 45, from its stands it can be turned 90 and be put in an inverted direction and in this position can be withdrawn through the space between two threads without in any way touching these threads.

I claim:

1. A pressure apparatus for the drawing mechanism of textile machinery comprising a plurality of rollers arranged in pairs, a table below said rollers, a bar extending across the width of the machine, the said bar supported in parallel alignment with the rollers and in spaced relation above the table, a pressure saddle for engaging a number of said rollers, a link rod connected at one end to the pressure saddle, a spring connected to the other end of said link rod, and a hook in the lower end of the spring for engaging said bar, whereby to easily disengage the spring from the bar for relieving the pressure upon the rollers.

2. A pressure apparatus for the drawing mechanism of textile machinery comprising a plurality of rollers arranged in pairs, a table below said rollers, a bar extending across the width of the machine, the said bar supported in parallel alignment with the rollers and in spaced relation above the table, a pressure saddle for engaging a number of said rollers, a link rod connected at one end to the pressure saddle, a weighted lever provided with a hooked end for engaging thebar to permit swinging movement of the lever and a connection between the other end of said link rod and said lever whereby to transmit the pressureof the lever to the rollers without permitting the lever to contact with the table.

3. A drawing mechanism, comprising rollers, a table below said rollers, a bar extending across the width of the machine, said bar supported in substantially parallel relation with the rollers and in spaced relation above said table, a pressure saddle for engaging certain of said rollers, a link rod connected at one end to said'pressure saddle, and pressure means including a hooked end connected to the other end of said link rod and having engagement with said bar independently of said table.

4. A drawing mechanism, comprising rollers, a table below said rollers, a bar below said rollers and extending across the width of the machine, said bar supported in substantially parallel relation with the rollers and in spaced relation above said table, a pressure saddle for engaging certain of said rollers, and pressure means connected to said pressure saddle and ending in a hook adapted to removably engage said bar independently of said table.

FERNANDO CASABLANCAS.

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