BE358605A - - Google Patents

Description

       

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  Friction control pons cables. chafnes and other organs of anal trauma.



   In both extraction and control systems, it is often necessary to increase the frictional contact determined by the winding of a cable. A chain or other similar traction member around a control pulley is wound which takes place, most often, on half, or even three quarters, of the periphery of the pulley. If we want. for this purpose, winding around the periphery of the pulley or leads beyond it, the traction member must be driven in a helix around the control pulley or the drum.



   It is quite possible, in the gait change controls, that is to say in those which perform the same movements

 <Desc / Clms Page number 2>

 
 EMI2.1
 in both directions of rotation M euooidsnt regularly. achieve this idea by making the traction member centered-iter a back and forth movement in a helical groove provided on the barrel of the drum.

   This arrangement does not and, first of all, not
 EMI2.2
 usable for cO11es acting in a direction fle rota tiii constant, but preste nus-, i, ur les cor.z.nie9 chanb !! J '! l'! Ot le -: 1: c "l, tellem '1' -.le: 'xtr "1ct11:' 1 ¯> ir the well in the *! mines, two faults): '1dnt: Tune put, the target executes, c) ntr "11rent \ ce 1ui and the C23) jur the extrem" 1C111 to ul1e de cor ^ ra3e Kissed on the -Daughter of his mother. r1d only; extr¯ctm: :: '3'pe). continual iscillatians around the. average position with undesirable lateral deviations, in an a.-ial-jiue manner which is the case in the known drum extraction 1nstallat1JnS in which the cable is prepared each time an e-ir3ulenant .

   To this is also added the fact that, despite the periodic change in the direction of rotation of the control pulley, it occurs over time, as a result of elastic elongations.
 EMI2.3
 different from the cable correepondnnt to the different loads. a one-sided shape of the cable loop.



   We have already tried to make such a command by
 EMI2.4
 control pulley friction embraced * by the traction member over its entire periphery or beyond by winding the traction organ in one or more turns on the united periphery of the control pulley. The cable loop, which thus acquires the tendency to move away laterally from its mean position, must therefore, in order to maintain a state of inertia, always be pushed back artificially. This is achieved by giving the periphery of the drum a trough-shaped profile, so that the loop of cable climbing here on the increasingly steep lateral limitation slope slides back each time.
 EMI2.5
 



  These drums called 10 tmnbo, tre friction '0 suffer

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 EMI3.1
 of this intrinsic contradiction that. on the one hand, the cont% ot the fntterent must be solicited in the tangential line for the target, while it must, on the other hand. be broken for transverse displacement oonatsnt of 81ple or multiple cable loop. It is naturally necessary to have aus = 1 that the. vitee "e different from or3" ne 3rd traction winding you always iiir a radius folds Large, vls- 1- unrolling '\} "' \ I1t place on a smaller r '-' Yo: 1, or compensated by a sliding against the pulley in the direction t - tn3eitie-.

   One removes ai; if again partially, first of all, the ability to drive the cable guaranteed by the winding plus: ;; r-u1d .. while, on the other hand, the traction member also undergoes great fatigue owing to the refluler.ient lstér'1l. One annoying circumstance is, in this. that the various turns must be placed close to each other.

   In any case, one cannot use a cable housing either.
 EMI3.2
 d3.-s a groove so i decrease the. specific bearing pressure of the cable on the tnnbour, and oilnai is also eliminated the possibility of giving 3 this groove, known that this usually does not provide a packing to save more cable and friction.
 EMI3.3
 It is also customary, in oableuaea machinery, to haul the finished cable by a multi-winding friction drum in which the loop is artificially separated by a wedge-shaped avoidance member, fixed in space, against which builds the incoming cable strand.

   As we can
 EMI3.4
 see right away, the downsides mentioned above are here. first of all, conducted them. But this is also added to the fatigue which the cable undergoes due to the fact that it will apply between the lateral avoidance member, eoua
 EMI3.5
 pressure k overcome in the backflow.



  The invention relates to the solution of the problem of creating such a friotion control for crganes.

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 EMI4.1
 3. tr "" * .. 'n' l: Jr '\ "1'I" l .., tt 1 aul ie .1 o ",,"' '' 'ndoa zip oit no "' J:" t -) ur or su-'e: i, -oljti-) n 3-ma 1 't "there el 1- zou'11"' .1s "f8 3" in * coo1O'-inde - - "n3 of rotation 'Il t-rn' \ t1 r oi of a cO ",," 'U²1e "-"! 8 0. I7L1L10.'1 C7 "lpv ,, 1 - te .... ¯l1 !! ^ n .... ,, ..,. loop of the reaction member in the same middle plane and guaranteed, as a result of the displacement of the traction member on the pulley, without any disturbance, in particular in this member itself.

   For this purpose, there are provided, on the periphery of the control pulley, kinds of tan -
 EMI4.2
 mainly by the periphery of the control pulley and forming, in their succession, a groove of helical shape which first of all represents, for the traction member, a housing and a diet guard making it impossible to rub and crushing of various turns of the traction member against each other. This cable housing can also, if necessary, be provided with a special trim (leather. Wood, etc.) guaranteeing a coefficient of
 EMI4.3
 greater friction and greater gentle handling of the traction member, notably of a target.

   Due to the fact that cabote necks are, at each turn of the oommaesde pulley, moved @ with a controlled movement, transversely, by an equal amount
 EMI4.4
 at. the distance between the strand of the traction member is ux ta, p08ant, one obtains a continual renewal of the maintenance groove of the traction member, thus remaining in some way fixed in space, and this naturally in4é - 9endeeoeent of the direction of rotation of the oomaaade pulley.



   One embodiment of the basic idea mentioned above, which is of particularly great importance for practice, consists in bringing the mentioned shoe together in a ring in the form of a chain which also embraces the control pulley. on a part corresponding at least to the winding of the traction member and this always

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   brought back. outside the pulley, from @On deculent point to @on winding point, crossing the strand remaining on the pulley.

   Here too, if necessary, the tangential driving of the shoes by the periphery of the drum can. instead of being done by friction, be done by means of some kind of en. Grenage nana that the necessary transverse displacement is adversely affected, which can also be facilitated by a suitable choice of material, by lubrication, or by the interposition of rollers or rolling bodies. One can of course also establish the upper part of the shoes, forming the groove, by means of a material which, like the known aluminum alloys, has a high coefficient of friction, while the lower part is provided with a a coating, such as steel, which has a coefficient of friction as low as possible.



   The simplest embodiment of this idea is obtained, again, by winding this annular succession of shoe on a control pulley having the trough-shaped profile mentioned in the introduction. Fig.l shows an example of an execution in elevation, Fig.2 in profile view, while Fig.3 is a cross section of the control pulley on a larger scale and Fig.



  4 shows, in detail and also on a larger scale, the execution of the shoe chain.



   The rubbing drum 10, which must be represented here as having to serve for a rotation of constant direction, has the section visible in fig. 3, according to which it consists of a cylindrical part to which is attached a second arched part following a suitable curve, for example in an arc of a circle.

   The various shoes 11 of the shoe chain are embraced by the cable 16 and wind up on the drum 10 so that the entrance is each time on the side of the curve, so that it occurs, consequently

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 backward slippage determined by the greater or lesser asoension of the incoming strand of the cable. a continual discharge the loop towards the cylindrical part. The entry of the cabota chain 11 is effected by the tooth-shaped projections 14 'provided on the cylindrical part of the drum 10 and engages in the grooves 13' corresponding to the shoes 11.

   This teeth 14 'have a limited width such that the notches 13' of the shoe chain 11 remain in engagement with them only as long as they rest on the cylindrical part. It follows that the shoes moving progressively is right to left land without disturbance on the teeth 14 '. In order to compensate, in this ... a possible play in the joints of the shoe chain and, consequently, irregularities in the pitch of the chain, the teeth 14 'are a little tapering towards the input side.



   Like all 11 shoes transmitting friction to the cable !! are not all, here, coupled to the drum 10 by meshing. but only the teeth of the turn being at the exit, the cable 16 antraïnement by the drum 10 takes place with a corresponding tension of the chain and.

   consequently, a solicitation of the articulations to journal. To allow, under these conditions, the torsion essential for the passage from the exit to the entrance, the articulatione of the shoes 11 are established so that, first of all, a journal articulation 20 allows the reopening movement of the shoes 11 in the as necessary in the passage of the tension in the free end to the curvature on the diameter of the friction drum or the deflection pulley.

   Next to that. the shoes have, thanks to the presence of the journal 21 arranged perpendicular to the journal 20. a certain ability to twist. so that the island can freely adapt to the running of the chain in

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 all the stages and yet a hundred capable of transmitting forces. The oscillation limited around the journal 21 which is neoeeeaire for that. this same advantageous, because the complete overturning of the cabote this thus avoided. so that when winding on the drum. the quite minimal recovery occurs on its own.



   Due to the fact that the cable loop located at the exit is only entrafed by the teeth 14 ', there is naturally also a greater pressure in the mesh and, to receive the latter with a specific grip per unit area as well. minimal as possible. The teeth 14 'or the notches 13' are established so as to match fully, that is to say not to touch only by lines, as in the case of real teeth.

   This is acceptable because the entry at p: the shoes 11 with the teeth 14 'is done here by a progressive lateral sliding. while the exit can be done freely, as a result of a slight thinning of the teeth outwards, because the notches 13 'slide in the middle of the shoes between the joints 20 allow. as we can see immediately, an easy lifting Migrates intimate contact.



   As, in a way, a certain faculty of reciprocal torsion has been given to the sabote bed, we can still use this faculty to improve in a corresponding way the passage of the shoe chain 11 from the exit to the entrance, Its effect, if one uses, instead of a large deflection pulley, two smaller pulleys 12a and 12b, Those-01 can be arranged in space so as to always be placed in the determined plane, on the one hand , by the end of the cable and, on the other hand, by the connecting line between the two deflection pulleys 12a and 12:

   the same thing happens on the outlet side, so that the two pulleys 12a and 12b come to lie obliquely to each other.

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  This gives, first of all, easy walking of the shoe chain 11 without any lateral inflection. The actual twist - admittedly larger of the various elements of the chain. which occurs in this way, is received * freely by the uni-alley joint! 9. -21. The overall arrangement thus becomes simpler and easier than when using only a large deflection pulley, and also occupies a smaller space: a valuable advantage is, above all, that the free cable runs become as short as possible. Due to the small diameter of the deflection pulleys 12a and 12t, it is recommended to establish them in a polygonal shape in the senna of dredger tarbors.



   To facilitate the passage from the curve to the straight line, the shoes are, at their lower part, supposedly rounded, and thus a kind of wedge effect is created for the repression of the turns. The binding of the hooves into a universal joint allows, at the same time. a simple realization in the sense of a correction of the pitch of the chfine. Although, in the present case, the universal joint is not subjected to the toroidal under tension and therefore proper wear does not occur, it may be desirable. with a view to correcting inaccuracies in the first manufacture or after a certain work of the joints, to influence even laterevent the pitch of the sabot or notches 13 '.



   To this end, the longitudinal journal 21 is held in position, in a chamber-shaped recess 22 of the bots 11, by a nut 23 which can be rotated by means of holes 24. With the aid j 'a key 25 housed, on the one hand, in a corresponding mortise @ of the pin ± and engages. on the other hand, canopy of the notches 26 of the nut 23, it is posai ble to fix the nut in position after its mine at the exact point.



  It is thus not only possible to immediately carry out a mine

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 exact point, omitted again. eventually. a correction of the pitch% near a long service life
Instead of giving the control pulley a trough-shaped profile. one could also give it, according to fig.5 a cylindrical profile to which it attaches conical cheeks. It is also advisable, in this, to give the chain satots, instead of the lower rounding, a tapered conical shape corresponding roughly to the angle of this conical surface of the cheeks: one can also foresee, the place winding. an auxiliary pressure roller intended to support the wedge action deterred by the tension of the traction organ.



   The embodiment shown in elevation by Fig.6 in longitudinal section seen from below by Fig.7, and for which Figa.8, 9 and 10 represent on a larger scale, respectively in longitudinal section, in section transverse and in partially cut elevation, a corresponding execution of the shoe chain, again presents two particularities.

   Although the oblique pulleys 12a and 12b used in figs. 1 and 2 guarantee an exact walk of the chain, without lateral inflection, but only with a reciprocal twisting of the various elements of the chain, there is still a series of discrepancies. Thus, the curvature cabote corresponding to the dismeter of the control pulleys must now pass over an arc of lesser diameter, which adversely affects the conditions for quiet and easy walking, whether the deflection pulley is established with a circular periphery or with a polygonal periphery.

   To this is added the louder noise in the passing of the chain on the deflection pulley, as well as the disturbances inevitably caused by the whipping of the cat strands * in the horizontal or oblique parts * we the action of the weight, although the chain of hooves must not move

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 EMI10.1
 --......., ....



   a tension leads to an effort of work.



  These defects of the dismissal of ohatue employee So far one hundred law 8u> pri ... 4. of the fact that the strands * of the shoe chain are, starting from the place of unwinding of the target. on the one hand, and from the winding point, on the other hand. still at! -
 EMI10.2
 of the "void", on the periphery of the pulley of aourands, r-ur languor such that the chain end 3ér; LLant de la. pulley and the chain end winding on this pulley graze, like a suspended literal loop, created with a suitable sag, the chain ends being on the periphery of the drum.

   We first get,
 EMI10.3
 read this runner, the simplest guide of the belt, because the pulley or the deflection pulleys are removed because they are rer? lacée, in a way, by the fies' arc I the pulley of eoinrande again vacuumed by the chain of shoes. Since, with the deflection pulleys, the more pronounced curvature of the chain end to be returned and its repeated winding and unwinding, this also results in easy and silent walking.

   Whipping
 EMI10.4
 strands of chatne moving, otherwise, harshly or obliquely, which produces the action of the weight. is also avoided, since the strand of catnip
 EMI10.5
 the pulley .8e places here freely in a line of haine whose shape is not significantly influenced by the centrifugal force at high speeds. we also have, of the aorta, the most natural preliminary tension for the return of the chain. As it only takes an arrow such that it allows the free crossing of the chain strand remaining on the pulley, the size is also. for this chafse return, as small as possible.



   However, as the freely suspended chain loop here must be diverted by a corresponding amount from the unwinding point to the winding point.

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 dant to three or possibly to a greater number of lar - gour @ de .abot, he fant. for calluses, a greater reciprocal twist of the various chain elements in the loop, which preferably does not get tor - @ion. by the filling of spherical Jointe between the various elements of the chain, the universal articulation of the chain thus created now allows, moreover, to move a shoe width, locally.

   the chain strands resting on the drum, using a repeater fixed in the space, which forces the chain, the shoes to move over a limited length, of its entire width.



  This is achieved, in combination with the universal articulation of the chain, also creating. moreover, for the application of the side surfaces of the shoe chain against the rebound, to advantageously establish a pebble shape, all the conditions for an exact march. The fact that the taut cable pressing into the barley of the shoes gives the local curvature of the shaft produced by the repeller in the form of an extension 8 plays an essential role here.

   In this way, the simplest possibility of transverse displacement is created for the shoe chain. As, apart from the place of displacement, the chain of shoes is, moreover, fixed on the periphery of the Control pulley in cylindrical turns, the training of the shoes by meshing with the control pulley can here, if necessary. - lemnt, to be suppressed, because one can, \ this effect, fairo serve the friction of the chain against the periphery of the drum.



   In such a reversible cable control with double rolling of the cable on the control pulley, as shown by the freezes. and 7, the control pulley 10 is first embraced by the chain of shoes 11, the teeth 13 of which mesh with the corresponding notches 14 of the perirhérie of the pulley. While, so far, chain 11 was, whenever it came to the place of unwinding -

 <Desc / Clms Page number 12>

 
 EMI12.1
 ment or I winding the olble.1!., or at least shortly after tee. also lifted to step back by the * deflection pulleys. the two strands of chatne now continue to be juidie.

   He rides'. eur the periphery of the control pulley 12 crJlser manner. in free suspension, the c, sfne 11 remaining on the pulley 11. For,.).! c'1st. l 'cidnit j'nrr) uleme: 1t of strand Je C "" I.r: 1 freely' 1p: 'l1'.l. çue this one .. 'b: u'ra9 "' e due the several due ch.'1r" 1 It is trJ.> 0Jnt on ta :: J '.. ù 1e and,; rimpe ^: r :: "; 'c- ci. lai., -.cti')" 1 ',' 1.! ) the elements ,, c1 "3.f'ne is a little 3rnîie up and down, so that the strand of chain which is
 EMI12.2
 coil is pushed aside by chain elenents nor hole - came on the drum.
 EMI12.3
 



  The tremaveraal displacement mentioned is produced here by the spatially fixed drive rollers 56, 56, which move the width of a shoe, with each revolution and also for each direction of rotation, the end of chain lying on pulley 10, so that the shoe chain describes, at this point, a curve in space.

   The flexibility of the chain 11. which is necessary for this, and created, not only by the? spherical joints 55, but also by the fact that the chain elements are as short as possible, that the chain
 EMI12.4
 does not therefore receive a small step; the trapping teeth are there, moreover, established in a convex shape so that the
 EMI12.5
 various elements of the powerful ahalne, as a result of the play in the notches 14 of the drum 10, perform a certain rocking movement.

   To improve, in this., The operating conditions for the pressure rollers 56, the side walls of the shoes are given, as shown in fig. 8, a slight inward curvature, so that, instead of the polygonal shape determined by the finite length of the chain elements, it is formed at the location of the gaiety 56, by means of the cable 16 being under tension in the

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 EMI13.1
 throat of sabote n, an eonetante curve. Preferably, the rolling face of the pressure roller 66 is established. in a material such as nacanle4e fiber. the e, zir vert. etc. in order to compensate. Firstly. inequalities still ex1etan tee and liussi, I besides pmrt, to dampen the noise.



  These push-up rollers 56 56 are also usefully arranged so as to push back the strands of chine back to the pulley 10 before the strand of the return loop is wound up again on the ta-bour . One can join celt, j'b1ée. A will improve cJi3i3tant in that snt przvia, side of the pressure rollers 56, of the guide rollers 57 for the return loop, these two rollers being offset between them so that it occurs a completely exact juxtaposition of the two strands, which guarantees a permanent position of the turns of the chain in space.



   An embodiment of the chain of shoes which is particularly suitable for this form of repression,
 EMI13.2
 but can naturally be used just as well under other conditions, results from Figures 11, 12 and 13, which are respectively a cross section. a longitudinal cut
 EMI13.3
 and a view of 1e9sou8. The cable 36 bones moves in a groove formed by the strips of leather, of lérodo fiber or of other ma tièrea snaloguea, laid out of the way, which are inserted one next to the other, in number cJ; are here in the form of clasps and are held in 1'l "-oe by rivets 64. The eabota Il 'Q'acc: pleat 1' using their notches 13 'with the corresponding teeth @ of the pulley of ordered.

   The various sipes 65 have, first of all, such a length that they each extend over a length.
 EMI13.4
 number (n) of stirrup-shaped shoes 11 '1 when they are also arranged in number Cil). side by side, in the stirrup. If they are, at the same time, shifted between it. of a length equal to the pitch of the shoes 11 'in the direction

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 EMI14.1
 from the periphery. it turns out that. as a bearing aeotion each joint between their cabota U6- (n 1) 1'Mtlleg- It was therefore not. in principle, no four links the @ stirrups 1 / between them, because the link is here formed by len 18J1 "'! l" .es 6 S. leequellee; where ::! 1ent n..turel18't also slow the necessary flexibility to allow flexions and torsion.



  Y-tis c,) 1 '!!' "'e. Aius the preaaion of the winding of the c-tbie. There is the danger of a reres3lf lengthening of this fmeceu of lmnels dîna the meaning onJl studied: 1 / Ù. It is recol! Iml \ ftd'1ble to simply connect, at -irticulation, the various aabota in the form of stirrups 11 '. This can be done here in a way, str; r.P'1t., i "'ple in: 1.cr'Jcha .." 1t the stirrups 11', by e..1111 "ei form of hooks 6t, in-.ns of? éCh ".1c ::" '. lr "! e corre" uo'1d ".ntee. !! .. which allow 1 ... ne turn lee co, this' 1r their integer forte, la. lxi.,' 1 1 "1-? 1m = ée in, au lie,., I'1i qu- perpen.io, uairanent this plan. d-ma 1z Measure 0'1 it 4I'9t necessary, and move the trtion in the hencle df psaq-ge of The place of unwinding the place 4'rec? 'u; - - "nt le-? 3 c! -Qîne of: 5ts.

   We do this in a way. 1- epherical journal according to fig. 8-10 in its only! é1é = 'onts of surface entering priicipalenent in action.



  One can better,., According to fig. Lla, realize aueei
 EMI14.2
 the corresponding idea of a throat lining with the plates in the shape of an isosceles trapezoid arranged @ transversely,
 EMI14.3
 which have proven their worth. We insert such pia quettee 659 in leather, vulcanized fiber etc. the; uzee following the others, in the usual way, de.ne the notched groove below, formed by the stirrup 11 '; the s' !, box 119 receive usefully from her .. in this, the section already mentioned above! co-we being vt! l8euse.

   To ensure the connection determined by the reciprocal attachment of the sabot 11 ', or leads, possibly, to make this eccroahement superfluous,
 EMI14.4
 we first place, at the bottom of the throat, an endless band 69

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 EMI15.1
 made the yarn, leather etc ... and providing the flexibility of flexion and torsion euffieantm In order to 8Ip'oher. to the Joint * of the various cabota where there must be a certain clearance to ensure mobility, the escape of the leather pads. we
 EMI15.2
 can insert, at these places. special vulcanized fiber plsquettee etc. It is best, however, to cover it at each interval with special pieces of sheet 70 which
 EMI15.3
 9 platelets are retained without harm. on their side, to lq r -) bility dins la. "sketch o '1: e and ncc"' 1.ire.

   Thus they come together :, "J'1e f1.cf) n s'lt1sf '!. 1sf \.! 1tc. La c') j,:! 1t1" n po.1 =!. '1tr ,, "uct1o ! "\ all¯ ^ e 4p such! 1 ^ .01 f .s 65 'ia:."' 7r '1'1C.;') rs 3nS end notched below ei forms the dovetail, and 1 '' condition. r * p..it-nt du jr4s.>. it ",., 1e de cO:" '\ "' '1.:1de. due 1m.



  . or) 1 "'' !! and 1 .... f" .. c ',: t Pe:, =; iJ; of this jorse.



  The!' -,) deq described, - so far from the repression 1e 1t cr.11'ne ie "" .bots by the side cheek of 1; pulley of this pulley rises in the shape of a trough or @ or @ a conical shape (fig.3 and 5 or by grsleta fixed expellers of space, disp08é8, each place of winding (fig. 4) have the advantage of great simplicity, but present, on the other hand, this 1-here comes that the reinforcement of the chain of shoes and, consequently, of the traction cr3ane around the po'11.;! Io comnde presents 3 local irregularities and does not represent. in all because, a pqm of ex-.ct. screw? Wo4:

   we can achieve this e :: t1.ctenent in connection with the fixed expeller ds, n space the form of a screw pia almost completely embracing the periphery of the control pulley, so that, during the application, against the repeller, of the shoe chain, the latter and the traction member which it carries are pushed back laterally, not 10ca- tion, but gradually over the entire periphery. We can
 EMI15.4
 also, in this, to reduce suitably, by the interpoaition of rollers or rolling body, the very considerable friction
 EMI15.5
 against helio01dal delivery valve.

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 EMI16.1
 



  However, it is r¯¯8II4a1t1 .. dena la putiqwt, to remove ei * u1% men% these two constrained from the provision which has just been titled 8eat1onne .. see: * also in the sense of the great work of rubbing between the shoe chetne and the repeller fixed in 19 space that in the sense of the large congestion of the latter, by establishing the repeller we
 EMI16.2
 the shape of a central body slightly exceeding the diameter of the axis or the hub of the. control pulley, of which body
 EMI16.3
 central is derived the repression of the. chain bought p'u * through tigee de tranamieRion mounted @ in the
 EMI16.4
 pulley.

   In this way, first of all, the friction between
 EMI16.5
 chain and reflector népptmire to the delivery of 13 ch4fne of 3bota 4 should be provided for a diremêtre much more tit Pt, by qi'¯tP, ¯r .in 'tr-.Jt' "as much nk-tit, of ^ ¯te 1 , - tr-viil e rub eet c'3) 'ider' '. ble! "reduced. Moreover, the construction of the refJ'1l * ur, whose dimenins make 'r "i'mnt coode8, does not present any" iU1culty.



  In the dP?: Ins, the fige.14 and 15 represent, in side view and in tr8veree section, an embodiment corresponding to this idea. Fig. 16 shows a detail.



  Here august trontép, drene 1 t1r.b ", l% '10, lee 1.yiere 1 doem arm 38, 1'J:' 1t le? Tète" are guided dîna lee fentps 31 of lily crown of the drum and engage with the trainers 13 of the shoes 11. The inner head provided with g1.t8 39! the move dsne '.1.,' "groove to me tromsnt dine a corresponding conical sleeve and carried to a body 41, which is centered pox 1 ' rber of t'U'lbour 10 and 'presses, of rranière k not being able to turn, against lem bearings 68.

   This groove 40, r ,,!, Reentered in development. fig. there, forms a step of life 1 - do 2 'st.psce and operate, wall the greatest pyrtia of the periphery, a progressive repression of the esbote de chî! 1e 11, tMl1l! 1 that, with little dietazce became the place

 <Desc / Clms Page number 17>

 
 EMI17.1
 winding the strand of ohafne, the heads of 1 .., 1st .. hundred raised @ of the chain of shoe. to resume work
 EMI17.2
 of repression by not applying again against the strand of ohafne not winding up again.

   We avoid. in this way.
 EMI17.3
 an addition of any ineXactitudes: If the path described is too small. there will be a minimal trotter between the two strands of the sabota chain, bending one
 EMI17.4
 against the other: if it is too much,; rani, the second strand will apply against the first only a little later than in the standard case, as this last possibility is quite 3-done.
 EMI17.5
 harmless, it is recomran4alle I calculate 11. entire disposition <re, first of all, of rA.I11l '"P that the Jé? l'lcef" the "1t tr- ?ver, -% a.1 operated r the 3lapoi tif repouleur is a little larger ", r1J1d than the width of a, abat.



  To reduce, here a.U9 "i, the number doc élP" 1t. this is important to him, especially for the chanJelllent -market commands, the levers 38 only actuate each second shoe 11. and this in the middle, of the aorta that the intermediate shoe is driven by the other two. As we see from baked,
 EMI17.6
 this is absolutely admirable, given that, in this way, the training of the various cabotes have nevertheless ensured on the whole periphery. At the entry point of the ahafne of
 EMI17.7
 sabot only, where the letter 3 rd raises annoyances 11, the chain of dwarfs is then free over a great length.

   To limit, in this, the free length, it is usefully provided, on the periphery of the drum, lateral limits 42, which momentarily resume, at this point, the mission of the push-back levers.



   If this arrangement were used for a command to
 EMI17.8
 change of step, there would be, therefore, a certain discrepancy between the march forward and the march in reverse, because, now, these two steps do not coincide -
 EMI17.9
 not between them. Malta this discrepancy may be at -

 <Desc / Clms Page number 18>

 award-winning foresight. octane illustrates this in fig. 15, a certain clearance between the delivery device for running in avsat and the delivery device for reverse operation.

   This play is not, in this case, the cause of an ohoo or a blow, because it only allows a slight lateral displacement of the shoe chain and the cable loop before the dieponitif repeller enters. action. By allowing this completely harmless lateral displacement, the forcing resulting, otherwise, from the discordances mentioned, as in all the so-called "too closed" mechanism, is eliminated.



   This exemplary embodiment shows, moreover, besides the fundamental advantages mentioned, another advantage in the sense that it is now possible to connect directly to the friction drum 10 the control gear ring 43 and the braking ring 44 , as is customary in air transport orders, above all in mountain lines.



  If the rollers 39 themselves are still rotated on roller supports, the friction work is still significantly reduced.



   The same idea can also be achieved by means of a constantly acting pushing mechanism, as shown in cross section in fig. 17. The shoe 11 passed over the commando pulley 10. and forming the groove for the long cable. have a toothing 56 whose pitch is proportional, according to the ratio 1: 1, 1: 2 etc. , at the distance between the strands of cable placed next to each other, and with which the right toothed wheels 30, distributed in a determined manner in the drum, mesh.



  The straight toothed wheels 30 are coupled, using the Paire = of bevel gears 59 -60 and shafts 33, to the pairs of bevel gears 34 -35, one wheel, the wheel 35, represents a rotating central wheel mad on the tree. This engages, in turn, by its toothed crown e1,

 <Desc / Clms Page number 19>

 with the toothed wheel 62 fixed in space. the second toothed ring of which meshes with the central wheel * 63 fixed on the shaft.
 EMI19.1
 3by virtue of the difference between the tranamiseion ratios of these right gears, we have a differential mechanism by
 EMI19.2
 which, in the rotation of the) oullel2., the sabotes It are each time displaced by a width.

   It follows therefore, for
 EMI19.3
 lef Games direction of rotation, a constant pushback of the shoe chain in accordance with the winding, so that the groove for the cable 16 represents an exact via pitch always located in the same mean plane.



   One embodiment of this idea particularly
 EMI19.4
 avomtaàeuse is represented, in vertical section and in front view, by the pins-18 and 19. The pulley 10 receives, distributed over the periphery, of the delivery worm 30 'suitably controlled by the fixed central wheel 36, by the in-
 EMI19.5
 intermediate pairs of toothed wheels co-iiquae 59 '-00'. shafts 33 and bevel gears 34 '.

   Conne. again the leites moved him sideways. depS8 !! lU1t the section profile of the shoes ±, would increase unfavorably, by
 EMI19.6
 on the one hand, the height of the shoes, which) bll & 1t to reinforce the free floche of the chain loop, and would give to the chain, on the other hand. the occasion for embarrassment, the teeth @ are, as shown in fige.la and 19, set back? j 191..It & laughter of the section profile. To one direction of winding of the chain (straight winding) corresponds, in this, one direction of movement, to the other direction of winding; winding 1 left) the other direction of movement of the pushing device.



   The sabota chain loop is, in this, guided according to fig. 19 so that, in the case of an extraction
 EMI19.7
 by cOMr.1Ode pulley for wells whose cable strands 16 move obliquely with respect to the cable pulleys, on the extraction stand, the shoe chain is guided 'empty', on one side of the place unwinding of the cable, on

 <Desc / Clms Page number 20>

 
 EMI20.1
 about 1 /, and on the other side for about 1/3 of the periphery, so that the return loop may, with a suitable arrow, cross freely the strands of cat on the
 EMI20.2
 the lower half of the. control pulley 0.

   Attention should be paid here 1 ', tt1rr carefully to the fact that the tr1nver1 displacement work hardly increases as a result of this additional winding, ire of the chain of shoes around the control pulley, since the Empty chain strands are not loaded by cable tension.



   If we compare this new command with the current pulling Pulley or Koepe, where the cable does not embrace the. pulley that had half of ea. periphery, we recognize here the following: While retaining all the advantages of the extraction with control pulley, in particular also with regard to the constant position of the cable in the same mean plane, and with a single curvature (bending) cable, a triple winding of the cable around the control pulley is obtained. aorta that full account is taken of all the requirements
 EMI20.3
 these may appear in the service in the senna of an increase in contact-friction.



   An embodiment of this fundamental idea which deviates entirely -% - made from the preceding examples is illustrated by figs. 20 and 21, which show such an arrangement of the control pulley, respectively in vertical cross section and in view. side partially cut. Figs. 20 and 21 show, in the upper half, one form, in the lower half a second form of the mechanism.
 EMI20.4
 me for the continuous trqnavernal displacement of the sabots.



  The periphery of the drum is formed, here, by a continuous union of bodies rotating in the form of diepelled barrels and having, on their periphery, grooves intended to receive the traction member, while
 EMI20.5
 these revolving corpora are self-consciously, at each turn of

 <Desc / Clms Page number 21>

 the control pulley. of a quantity corresponding to the
 EMI21.1
 their-- jorges. The wire turns in one and a half turns, possibly in two and a half turns, around the frictional drum 7sQ, the periphery of which is formed by the turn oorpe nanta 12 and there, in the form of a pulley belt, arranged automatically.

   In order, I obtain a reciprocal connection praUquf'f "e" 1t !! I11! F1ss.nt on the outer surface of the drum, the body t-jurnantlu 51 is made smaller - than the rotating body of !! 1l: "re that they can, by virtue of the existing reciprocal inclinaiaon, engage in part in the latter. The bodies 50 and 51 are provided, on their outer surface, with grooves 11 'which, in their succession, produce
 EMI21.2
 the helical groove which is necessary for the cable loop.



  According to the embodiment shown in the lower part of the drawing, these rotating bodies 50 and 51 rotate idly on their axes. while their united movement takes place
 EMI21.3
 via the cable which ... bl '& 8e8. and this because the two-arm levers 38 'mounted in the drum
 EMI21.4
 they are guided, by their rollers 3g ', in a groove 4, of the repeller body It forming a step of life, according to tig.16. So that the heads of the leviera a can apply oon venablement against the cable 6, the rotating body 11, on which the levers 38 act usefully, this provided with a circular groove 52, without losing, for this, the surface cable support.
 EMI21.5
 



  According to the example of execution shown in the lower half of the figures, the via sana end 32 8 'mesh with the teeth determined by the helical grooves 7'; the bevel wheels 34 'connected to 008 life nana end by shaft.



  33 'are in request with the central wheel 36' centered on the shaft of the drum and fixed, so as not to be able to turn,
 EMI21.6
 on the landing e. It thus produces each liver, in a rotation of the drum, a partial rotation of 32 life and,

 <Desc / Clms Page number 22>

 as a result. a displacement of a quantity corresponding to the pitch of the grooves Il $.
 EMI22.1
 



  R3VS.DI C ATI OS.



  1. Friction control for key8, chained and overdone orsne8 traction aloue8, cnrmct4riAé; in that the traction member 't'nr :) 1.lle on the. pulley the cOl'17 "'ande by the intermediary of 8bots aerv ^ .nt housing and 1'entnfnanent of this organ, which thus form, dale i ^ ,. succession, a helical groove for the organ of tr- ictioi, read) rte that the strands of gold.: ;; ::. ne of traction is credited and se, 7uxtapoe3, nt are held at a certain distance from each other and which are, at each turn of the control pulley, moved transversely on the pulley by an amount corresponding to this distance so that the loop of the traction orane cm
 EMI22.2
 stirring the control pulley remains constant in roughly the same midplane.


    

Claims (1)

2. Friction control according to. Claim 1, characterized in that the periphery of the drum is formed by a number of tangentially arranged barrel-shaped rotating bodies, which are provided with grooves serving to accommodate the traction member and are, in their succession, arranged the one with respect to the other so 8.form a helical groove for the traction member, the constant position of which in the mean plane is ensured by an integral movement of these rotating bodies EMI22.3 taking place at each turn of the cO !! ll1ande pulley and edges - laying at the pace of the sips. 3. Friction drum according to claim 2, characterized in that a succession of rotating bodies of different size is used, so that the smaller ones can engage in the larger ones, in order to have a connection such as to result in an unbroken surface <Desc / Clms Page number 23> EMI23.1 serving as a rortaoe of eosoalrueat for the wandering of traction. 4. friction coonnnde according to claim 1. -esraoteri * 4 * in that I sabotage foramt the logmmt are reunited, daru the sense of p4rinhérie. in a chatne aorta which helical slabs the control pulley and whose strand leaves the control pulley is brought back to the 3 'side; r7, ai + cnt, creating the strand re both on the pulley. 5. Friction control dltprèn lx claim 4, cn.r * 'ct4risee in that, during the upsetting of the incoming strand of 11 c'l' - ,, - tl'1e of Jab3ts pir li '! Urf'1ce of 1i ... t '\ t1on lateral le li;' 1 if "-1 'co-rom3e a'rising pr, e; res., 1verlent, the turn of chenue finding me on the unwinding side is" led in ,, r -. 3 with 4ths provided on the cylindrical part of the sheave, the length of "4 ;; t: being proportioned 1; 1 ^ behind the 1q p'trtie c7rl'indr1'te back as Vnniére that the élé-eitt3 of 1 ..... china of N "bots are already walled there. cylindrical part 'lVt to engage, vee the EMI23.2 teeth. EMI23.3 4. ZprPa friction control of claim 4, c'U'9.ctérlsée in that the necessary displacement tr'1SVl! Rsal of the c1-! Û: '1e of shoe on the control pulley takes place by the local nfouletnent of this china by means of cheerfulness EMI23.4 fixed in space. EMI23.5 P. COL'1de by friction with claims 4 and d, cir-tct4ri-ée in that the rollers rf) 'eur8 act, in front of the place?' ; finally from the return loop, on the strands of chain on the pulley, while the strand of chine which winds up is, itself, pushed back towards the opposite side by meters --tlets of m3..ire \. guarantee a free juxtaposition of the two strands of pussy. 8. C01r.l "! Mde by friction according to claim 4, EMI23.6 characterized in that the discharge starting from a fixed point EMI23.7 in space and acting on the chafae in a distributed attack <Desc / Clms Page number 24> EMI24.1 frur the entire periphery has a link following a step of life ooeutaat (exact 9. Friction control according to the resale B. cactéri81e in that the attack of the delivery device re part eur to, ite the periphery takes place by jumping each times one or more elements le l ch-% l'ne, so that the elements of ohzine lltor-edi, iree are entered. 10. Cor "- 'ande pu friction according to claims 8 and 9, characterized in that the discharge takes place from a central body surrounding the shaft of the control pulley and EMI24.2 via rod? of trnmmis-, 4ion dimpoaéem of my pulley f *? Comr nnde towards the pPrīhérm, from r: .rli? re red'-ire both the friction work occurring in the refoaleur device and the dimensions of the repeller fixed in space. 11. Friction control according to claim 10, characterized in that the shoe of the chain are gripped by refuleura fingers mounted in the control pulley EMI24.3 and guided by a helical groove arranged on the central body and connected between the place of unwinding and the place of winding by an S-shaped curve, so that the pushing fingers salt, each turn, brought back against the EMI24.4 strand of ch2i'ne winding up again in a raçon k always introduce the tranevereal displacement from the zero point marl. EMI24.5 12. Control pu friction according to claim 10, cersctérieée in that the chain shoes used for delivery are provided, on their inner surface directed towards the control pulley, with a toothing whose paa is proportional to the spacing juxtaposed strands of the traction member and which allow the meshing of constant-action driven elements, such as straight toothed wheels or fine via cane, which are, in turn, set in constant motion, depending the direction of rotation of the <Desc / Clms Page number 25> EMI25.1 aorr-ande, 1k p '\ rUr of a fixed hub wheel placed on the shaft of the pulley as well and by the armadiaira of trsn¯1.81oft rods. 13. Co8mSft4. by friction according to claim 18, characterized in that the straight wheels meshing with the toothing of the chain shoes have entered, through the intermediary of shifting mechanisms, with a loose toothed wheel on the shaft of the. control pulley and forming with the. central wheel fixed on the shaft, by the intermediary of an intermediate wheel rotating about a fixed axis in space, a differential mechanism. EMI25.2 14. Cory-i - ide pflr friotnn '' l ..; after claim 12, c.r.ctr: sée in that the screws s n3 end of discharge distributed on the. periphery of the control pulley are coirman deéee, by the intermediary of pear3 toothed wheels. ,, conical having a suitable transmission ratio, by a bevel wheel fixed in space and surrounding the axis of the control pulley . 15 Friction control according to claims * 4, EMI25.3 5, 8 and 10, characterized in that the retofileura devices for the. forward and backward are offset with respect to each other so that, in the reversing - EMI25.4 ventilate ce-ocbe, 1 "chssne de, ibJt: first unfolded transversely by a certain amount in relation to the control pulley before entering into engagement with the push-back device, in order to avoid foroements resulting from a lack of concordance between the two directions of travel. EMI25.5 16. Friction control according to claims 4 - 15, characterized in that the passage of the. free loop from the winding place to the unwinding place is achieved by means of two deflection pulleys which are arranged in the planes determined by the outgoing or entering strand of chain, on the one hand, and the connecting line between <Desc / Clms Page number 26> EMI26.1 lef two pulley *. on the other hand, that is to say obliquely between them. so that there is produced an exact t) "ohe of 11 c> fnP -; Inflection 1, ter-1., but slow down a twist., n reciprocal of the various elements of the ohr'ne. 17. COM8and. polr friction 4 ', pr% s le @ rsven410' \ tions 4 - 10. oe that the! ' strands of the oh ...! ne of s, box are, \. from the place of unwinding of the traction organ, 4 'on the one hand, and the place of 4' winding, on the other hand, still guided to empty gur a section such as 11 ”! rt er1 of InL pulley r 'control - .. d -.,. the extraction '10 nnoù p..1 "1- li t CI. approximately read d"!. 11 !! a cn, about 2/3 dule iltutre that the 'loop of return can t ,,' t "'lr'3, - therefore a suitable arrow, freely cross the' strands of c," ,,,, 1'ne se located on the lower half of the pulley. 1P, Co..an1, 'Or friction of lprèe resells them 1 o "! Tll) ne 4 - 15, characterized in that the sabotes of the chtine are, ptr 1'engrénénement of eilliee and thinned recesses in form of wedges and allow the entry * i intimate interest and the lore deg 4ement of the derileme-it, coupled -veo the periphery of the drum in the mens of a tangential entrdnewent without rtduc tion df lot t '' '. cultivation of lateral displacement. 19. = o "1de by friction 1 ', \ pr8 the rrendiostione 4 - 17, 0'u-aotériaee in that the flexible connection of the various shoes is established 8') U8 the form of a universal joint @ in such a way that besides the mobility necessary for flexion and elongation of the body, a limited reciprocal torsion of various elements of the ahtin is possible in EMI26.2 the strand. EMI26.3 20. Friction control according to claims 4 l, it will '' \ ctérI8ée in that a journal located on the axis sabotaged them, with the aid of a nut housed in a obviously in the form of a chamber and rising to be immobilized suitably, moved so as to allow a correction of the dan. <Desc / Clms Page number 27> 21. Friction control according to claims 4- 17 in particular according to claim 6, characterized in that the necessary mobility of the chain in space is achieved by means of spherical joints, by the use of a small chain pitch and by a domed shape of the teeth of the chain. 'drive, while an easy movement of the chain on the pressure rollers fixed in the space and ensured by a re-entrant curvature of the lateral surface of the shoes. 22. Friction control according to claims 4 - 17 in particular I after claims 5 and 17 characterized in that the profile of the chain shoes is tapered towards the inner side so that, on the one hand, a certain wedge action can be exerted for the lateral repression of the coil and that, on the other hand, the incoming part of the return loop of the chain does not embrace itself in the shoe on the drum and climb into them. 23. Friction control according to claims 12, 13,14,17 and 21, characterized in that the toothing for pushing back the chain shoes is set back in the section profile thereof, so as to reduce, Firstly.' height, and on the other hand to prevent the cat from getting into the winding side. 24. Friction control according to claims 4 - 23, characterized in that the shoe chain eet constituted by lamellae placed field and made .. of a. flexible material, such as leather, Ferode fiber etc., which form the housing for the traction organ and are maintained. Naked joined by shoes form stirrups, the latter being, in turn, hooked into each other in the manner of hooks, so that the necessary bending in two directions and the twisting can occur freely. 25. Friction control according to claim 24. characterized in that the juxtaposed strips @ in number (n) <Desc / Clms Page number 28> have a length such that they extend over (n) stirrup @ de * @ bots and feel staggered relative to each other in such a way that it is at each joint between two stirrups of chafes. as the section carrying *, (a- 1) the trunk. 26. Friction control according to claims 4 - 23, characterized in that the known leather pads. vulcanized fiber etc. of isosceles trapezoidal section. are embedded in the shoe in the form of suitable brackets. established, the connection of which is ensured by an endless band made of metal wire, leather bands etc., the intervals between the various shoes being usefully covered by metal bands inserted into the stirrups and held in place by the recessed plates.