US1488583A - Bridling apparatus - Google Patents

Description

April 1 1924. v

.' J. G. BAIN ET AL BRIDLING APPARATUS Filed April 12. 1922 4 Sheets-:Sheet I Z/VVf/VTO/PS Joseph. G. Brain and Lag: I; M. 5.72m pel I541 73. QP'flfi April 1 1924.

J. G. BAIN ET AL BRIDLING APPARATUS 4 Sheets-Sheet 2 Filed April 12 /NVEN7'0RS Joseph. 6.342172 0.11:4 [Junio /1; Sfempel by fl-Lair ant-Tawney April 1-, 1924. 1,488,583'

' J. G. BAIN ET AL.

BRIDLING APPARATUS 4 Sheets-Sheei: 3

Filed April 12. 1922 April 1 1924. 1,488,583

J. G. BAIN' ET AL BRIDLING APPARATUS Jo'seph- G'- Bain mm LMzhMSTem eI bq WW 7 ?atented Apr. 1, 1924.

masts 'EQT JOSEPH G. RAIN, O2 PETTSB'UPUGH, AND LASZLO M. STEM'PEL, 0F DORMONT, PENNSYL- VANIA, ASSIGNOR-S TO LEWIS FOUNDRY & MACHINE COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION" OF PENNSYLVANIAa BRCEDLING APPARATUS.

Application filed- April 12, 1922. Serial no. 551,766.

To all whom it may concern:

Be it known that we, Josnrir G. BAIN and Laszro if. STEMrnL, both citizens of the United States, residing, respectively, at Pittsburgh, in the county of Allegheny and State of Pennsylvania, and Dormont, in the county of Allegheny and State of Pennsylvania, have invented a: new and useful 1-mprovement in a Bridling A p yaratus, of which the following is a specification.

This invention relates to bridling apparatus for use in conjunction with rolling.

mills.

A general object of the invention is to provide bridling apparatus which places under tension a strip of metal being passed through a rolling mill, while avoiding the labor and difficulty incurred in threading the strip through stationary bridle bars.

A more specific object of the invention is to provide bridling apparatus, of the nature noted above, which permits regulation of the tension under which the strip is held within wide limits in accordance with the thickness and stiffness of the strip being rolled, or in accordance with the nature of the metal of which the-strip is composed;

A further specific object of the invention is to provide for any desired tensioning of the strip within such limits.

It is also common practice to roll out metal wires of round or rectangular cross section, and of varying cross sectional area into ribbons. It is desirable that such material, equally with strips be subjected to tension while being passed through the reducing rolls. In the art it is customary to' include such forms, as well as the flat forms called strips hereinabove, under the general term of bars.

A still further object of the invention is, therefore, to provide bridling apparatusenr bodying the advantages mentioned above which may be arranged or. readily adapted for use with bars of round or' rectangular cross section as well as with the flat barsmore specifically called strips.

In the accompanying draWingsFigure 1 is a side elevation, showing-the bridling a pparatus in position on thehousing of a rolling mill; Figure 2 is a plan View of' the bridling apparatus; Figure 3 isa diagrammatic view illustrating the threading of a strip through the bridling apparatus; Fig;

ures 4, 5, 6, and 7 are similar diagrammatic views illustrating progressive steps in the tensioning of a strip which is being passed through'the rolling mill; Figure 8 is a front elevation or apparatus embodying the principles'of the present invention which is arranged particularly for the bridling of bars which are round or rectangular in cross sec tion; and Figure 9 is a detail'elevation of one form of bar adapted to use with such modified form of the apparatus.

In the drawings the reference numerals 1 and 2 designate the side or frame members of the brldle, which are secured in VGI'lLlO'fil ways 3 of the roll housing 1 by means of bolts 5, so that the bridle as a whole may be adjusted vertically for. alignment Withthe reducing rolls 6 r of the rolling mill. These side members 1 and 2 of the bridle are interconnected by means of an immovable bridle bar 7 disposed adjacent the roll housing; and by'bri'd le bars 8' and 9, which are rotatably mounted in the side members 1 and 2-but which are otherwise immovable with respect thereto.

Rotatably mounted inthe side frame. 1 of the bridle is short shaft lO'havin'gthereon the operating. handle 11 by means of which the shaft may be manually rotated. Rigidly secured to' the short shaft 10 is a segmental rack 12, which meshes with a pinion 13 keyed or splined on the more outwardly dis posed rotatable bridle bar 9. On their opposite ends, beyond the other side member 2, the rotatable bars or shafts 8 and 9 are provided respectively with the intermeshing pinions- 1 1' and: 15. When, therefore, the bar or shaft 9 is rotated by means of the meshing of the pinion 13 thereon with the segmental rack 12; the bar or shaft 8' is rotated in an opposite direction by means of the pinions 14: and 15.

The operating mechanism described immediately above is for the purpose of actuiii the bar 18 is mounted on the shaft 9, are shorter and from arcs of greater curvature than the arms 17 by which the bar 16 is mounted on the shaft 8. Thus the bar 16 when swung describes the arc AA, while the bar 17 when swung describes the arc 'B'.B of lessertradius than the are AA.

opposite directions; and it will also be seen that the bar 18, mounted on the shorter and more curved arms 19, will'pass the point Ci at which the arcs AA and BB intersectbefore the bar 16 arrives at such point.

In use of the apparatus the strip of metal 20, which is to be rolled, may be led freely 7 through the various bars of the b idle and gripped by the reducing rolls 6. This position of the strip is illustrated in Figure 3 of the drawings; which shows the strip lying beneath the stationary bridle bar 7 and rotatable bridle bars 8 and 9, and lying above the swinging bridle bars 16 and 18.

When the strip 20 has been gripped by the-rolls the bars 16 and 18 are swung in opposite directions to contact and deflect the strip 20. This swinging of the movable bars 16 and 18 is effected by swinging the operating handle 11, and thereby causing the segmental rack 12 to act upon pinion 18 for rotating the bar or shaft 9. Simultaneously the bar or shaft 8 is rotated in an opposite direction because of the intermeshing of its pinion let with the pinion 15 on shaft 9. This action obviously swings the bars 16 and 18 in opposite directions through thearcs AB and BB.

Figure 4 of the drawings illustrates the beginning of the operation described above; with the movable bar 18 already in contact with the strip 20, and the other surface of the stripin direct contact with the bars or shafts 8 and 9.

Figure 5 of the drawings illustrates a position of the movable bars in which they are swung still further in opposite directions, with the bar 16 also serving to deflect the strip 20. It will be understood that this position of the movable bars places the strip under a tension which is sutlicient for certain grades and thicknesses of metal.

Figure 6 of the drawings illustrates a further progression of the swinging opera ure, owing to the greater deflection of the strip.

These positions of the arms are those which are desirable when the strips being rolled are composed of aluminum or some other metal the surface of which is subject to injury by excessive friction.

Figure 7 of the drawings shows the final position of the swinging bars, as shown also in dotted lines in Figure 1 of the drawings. In this position the bars 16 and 18 have been swung past each other, so that the strip is brought into contact with itself to create a frictional drag against the pull of the rolls. It will be noted that this wrapping of the strip on itself is on the movable bar 18. It will be further seen that throughout an area XX two layers of the strip are in mutual contact, and that throughout the area X'Y three layers of the strip are in mutual contact.

If the movable bars '16 and 18 are swung into a position intermediate the positions shown in Figures 6 and 7 two layers of the strip 20 may be brought into mutual contact to create a frictiontional drag, without bringing three. layers thereof into mutual contact. Various other positions of the bars intermediate those actually illustrated may also be effected by producing intermediate positions of the swinging bars.

prise a locking pin 21, held in a bracket 22.

on the side arm 1 of the bridle and ar anged to engage between the teeth of the pinion 13 to hold it and the bar or shaft 9 against rotation. By holding the shaft 9 against ro tation, the shaft 8 is also held because of the intermeshing of pinion 14 thereon with pinion 15 011 the shaft 9. A coiled spring 23 in bracket 22 serves to hold the locking pin in engagement with pinion 13, and the locking pin is provided with a handle 24 for withdrawing it from engagement therewith.

The apparatus described above is so arranged that the strip passing through the rolling mill may be placed under any desired tension or subjected to either alight or heavy frictional drag. It is thus adapted for use in rolling metal strips of varying thickness and stiffness, and for rolling strips composed of metals which vary widely in their qualities and the manner in which they are most desirably handled.

The form of the apparatus illustrated in.

round or rectangular cross, section. For this purpose the apparatus shown in the preced ing drawings may simply be provided with bridle bars which have thereinsemi-circular or rectangular grooves for receiving the bar to be rolled;

As shown-in this-figure of the drawings, however, the apparatus is contracted and comprises bridlebars 7 8 9*, 16 and 18 oflesser length than the form designed particularly for the bridling: of flat bars or strips,= because bars-of'any great length are unnecessary tor the purpose for which this which it is intended, the threading of the-- bar is accomplished asshown in the diagrammatic F igure 3 of the-drawings. The actual bridling is accomplished with the- movable bars 16 and 18 in the positions shown in Figures 4, 5, and 6 of thedrawingsv Obviously it would be impracticable to produce the frictional drag shown in Figure 7 of the drawings, or produced by a position of the movable bars intermediate the positions illustrated in Figures 6 and 7 thereof.

The apparatus is strong, compact, and sim ple, and it may be readily operated by a simple movement of the operating handle in one direction to swing the movable bridle bars in opposite directions for securing the tension ing of the strip which may be most desirable for the speed of the rolls and the character of the strip being passed therethrough.

The advantages of the device as herein above set forth, together with numerous other advantages, will be readily appreciated by those skilled in the art to which the invention pertains. As the device described and illustrated is, moreover, susceptible of a number of modifications without departing from the spirit of the invention embodied therein, the scope of the invention is to be restricted only by the limitations contained in the claims appended hereto.

What we claim is:

1. In bridling apparatus for use in conjunction with rolling mills a pair of bridle bars mounted and arranged to be swung in opposite directions.

2. In bridling apparatus for use in con" junction with rolling mills a pair of bridle bars mounted and arranged to be swung simultaneously in opposite directions.

3. In bridling apparatus for use in conjunction with rolling mills a pair of bridle bars each mounted to swing about a dif ferent axis and arranged to be swung to-describe arcs of circles of different radius; whereby the barsmay; pass each other when swung 4. In bridling apparatus for usein conjunction withrolling mills a pair of bridle bars mounted: and arranged to be swung in opposite directions, and means for simul taneously actuating said bars.

5. In bridling apparatus for use inconjunction with rolling 'mills a pair of bridle bars mounted and: arranged to. be swung simultaneously in opposite directions, and meansfor locking saidzbars in adjusted position.

6. In bridling apparatus for-use in con? junction withrollingmills av pair of bridle bars each mounted to swing abouta different axis and arranged tobe swungto describe arcsof circleso-f different radius, whereby the bars may passeach other when swung;

and means for simultaneously actuating saidba rs.

7. In bridling apparatus-for use inconjunction with'rolling mills a=pair of bridle barsmounted: and arranged to be swungin opposite directions, means for simultaneously'actuating saidbars, and means for look ing said bars in adjusted position.

8. In bridling apparatus for use in conj unction with rolling mills a pair of bridle bars each mounted to swing about a different axis and arranged to be swung to described arcs of circles of different radius, whereby the bars may pass each other when swung; means for actuating said bars; and means for locking said bars in various positions along the arcs described thereby.

9. Bridling apparatus for use in conjunction with rolling mills comprising a plurality of stationary bridle bars, a plurality of movable bridle bars each mounted to swing upon one of said stationary bars as an axis, and means for simultaneously swinging said movable bars.

10. Bridling apparatus for use in conjunction with rolling mills comprising a plurality of stationary bridle bars each mounted to swing upon one of said stationary bars as an axis and arranged to describe arcs of circles of different radius when swung, and means for actuating said swinging bars.

11.. Bridling apparatus for use in conjunction with rolling mills comprising a plurality of stationary bridle bars, a plurality of movable bridle bars each swingingly mounted upon one of said stationary bars, and meansfor actuating said movable bars.

12. Bridling apparatus for use in conjunction with rolling mills comprising a plurality of stationary bridle bars, a plurality of movable bridle bars each mounted upon one of said stationary bars and arranged to be swung to describe arcs of circles of dif- &

ferent radius, and means for actuating said movable bars,

13. Bridllng apparatus for use in conjunction with the rolling mills comprising a plurality of stationary bridle bars, two movable bridle bars, arms whereby each of the movable bridle bars is mounted upon one of said stationary bars, the arms by means of which one of said arms is mounted being longer than the arms of the other thereof.

let. Bridling apparatus for use in conjunction with rolling mills comprising a plurality of stationary bridle bars, two movable bridal bars, curved arms whereby each of the movable bars is swiiigeingly mounted upon one of said stationary bars, the arms of the different movable bars being of such relative length and form and so mounted on the stationary bars that the movable bars may pass each other when simultaneously swung in opposite directions, and means for actuating said movable bars.

15. Bridling apparatus for use in conjunction with rolling mills comprising two rotatably mounted bridle bars, means and connections for simultaneously rotating said bars in opposite directions, and two bridle bars rigidly mounted upon said. rotatable bars and arranged to be swung thereby.

reassess 16. Bridling apparatus for use in con junction with rolling mills'comprising two rotatably mounted bridle bars, connections for said bars in opposite directions, and two bridle bars rigidly mounted upon said ro tatable bars by arms of difierent length; whereby said last named bars are swung to describe arcs of circles of different radius.

17. -Bridling apparatus for use in conjunction with rolling mills comprising-two rotatably mounted bridle bars, means and connections for simultaneously rotating said bars in opposite directions, and two bridle bars rigidl mounted upon said rotatable bars by arms of difi'erent length, whereby said last named bars are swung to describe arcs of circles of different radius; saidarms being of such form and so 'mounted on the rotatable bars that the swinging barsmay pass each other when swung in opposite directions. 7

In testimony whereof, we hereunto set our hands. 7

J OSEPHt G; BAIN. LASZLO M. STEMPEL.

Vitnesses:

V. E. BALLARD, E. B. WALTERS.

means and simultaneously rotatmg

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