US1707001A - Frictional screw press - Google Patents

Description

o. GEORG FRICTIONAL SCREW PRESS Filed June 9, 1927 March 26, 1929.

moans oi improving the manipulation and,

Patented Mar. 26, 1929.

UNITED STATES 1,707,001 ,PATENT OFFICE.

OTTO'GEGRG, 0F HERDECKE-RUHR, GERMANY.'

FnIe'rroNAL SCREW :Pansa Application filed .Tune 9, 1927, Serial No. 197,611, and in Germany February 3, 1927.

This invention has reference to screw presses generally and it- 1s intended to devise the manufacture thereoii and to arrive at a more unilorm and satisfactory mode ot operation than it was possible `to accomplish with the devices ot this kind, as heretofore constructed. :in view thereof my invention is chiefly concerned with novel means 'of driving and controlling the pressure producing means et such devices bythe employment oif friction discs and the like, and to generally :improve the construction of such machines. Screw presses to be operated by means ot friction discs have heretofore been generally constructed in sucha manner that the vertically reciprocable operating spindle or shalt has been providedA with a ily wheel which is turned to the lett or right by the alternating ifrictional pressure producing engagement of two even side discs keyed to a common shaft. This arrangement has given very satisiiactory results in the cascof small friction presses, while in the case Voit larger sized presses this -construction is open to `vari-` ous inconveniences, among which are to be mentioned very unsatisfactory utilization o'l' energy, very heavy wearing of the tires, and most irregular'rising of the center disc. 'if his is due to the tact that, while upon the descent ot the Center disc or intermediate i cannot readily :tollow on account oi itslarge mass, considerable losses of energy are pro-` duced by sliding and grinding motion. Frequently conditions are so unfavorable that the intermediate disc cannot be made to ascend `at all. y

lVarious attempts have already been made to overcome these dilhculties among which Y may be mentioned the expedient ot arranging the side disc intended for the raising of the center or intermediate dise in such a manner as to be staggeringly 'disposed with relation to the disc ior lowering the centerdise,

so that even in the ascent ot the center' disc the acceleration oi said disc will take place trom points olf lower velocity to points of higher velocity. In this case the regulation ot the side discs is ell'ected by thedisplacement et` the upper shaft, while the staggen ingly arranged side disc serving 'for the accnding movement is displaced by followers or the like in operative marginal engage` ment therewith. This manner ot operation is very objectionable however, inasmuch as tilting andjamming of the lower shaflt are unavoidable in this construction.

New, my invention is designed to overcome these drawbacks ot the previous construction by so arranging the sha'lts in the case et the staggeringly arranged side discs thateach ot the two shafts is centrally and separately operated, and in such a manner that both shafts are disposed to be sin'niltaneonsly reciprocated.

The invention is shown by way ot exempliiieation. `in two embodiments on the accom panying drawing in Figure l, showing a press ot the kind described in side ele ration, Figure 2 is an elevation et one ot the various modified constructions possible.

The center disc or intern'iediate disc or head l of the friction press is secured to the shaft or spindle 2 and is adapted to move up and down therewith and with the ram 3 `connected to its lower end, the shait being rotated to the lett an-d right. Upon its descent the rotation of the center dise is caused for instance by the lett-hand side disc 5 which is mounted on the same shait 9 with the fast and loose pulleys, 0, 7 and with the right-hand small side disc 8. Upon its ascent the rotation of the center disc l is produced by the right-hand lower side dise l() which may `'for instance be driven by a pair ot gear wheels 1l, l2 the `upper one oi' which may bepreiierably made of raw-hide, and by means oi? the p sha-ift, 9. The operating discs are forced against the central disc lin such a manner that each oi' the said operating pressure discs is separately and indiifidually moved by the pressure member or pressure slides 13, le, adapted to be operated by two cinematically equivalent members, thus for inst-ance by means ojl the elbow levers l5, 16 which levers are connected to each other by the link bar or pitman rod 17 in such a manner that the levers will perform exactly the saine movement. By this means the steering and operation of the machine takes place without the liability of jamming and tilting, even with very heavyside discs. The movement of the link bar 17 is either etl'ected manually by means of the hand-lever 18, or by means of adjustable stops 19,20 Vwhich are engageable by a Contact 21 provided on the rain 3 and are adjust-ably mounted on a rod 18L to which the lever 18 is coupled, said rod being connected by the lever 17v and link 17 to the 'lever 1G and link 17. The operating or sliding Velements 13, llt-are made to act centrally 4upon the discs 5, 10.

In Figure 2 alniodification is shown which v v"teni of levers for the `actuation of the two dises 5 andi() in any suitable manner.

It vwill have to be understood that 1n praetice Vmodifications and changes in the eoiistruction and arrangement of the constituent parts'arewithin the purview oi' inyinvcntion,

ezlceptas otherwise stated and .specified in the appended claims.

I claim l Y n 1.'Iii a frictional screw press the combination with an axially reeiprocable screw spindle, a' fly wheel secured to one endet the spindle land a rain at the other endot the spindle, of' operating friction discs, substantially at lright anglesto the intermediate Hy wheel and engageable therewith andstaggeringly disposed with relation to each other,

y rotating means vfor one of said dises and operative connection of said ymeans with the other ,friction dise, pressure producing means at the Voutside' ofV said discs, lsubstantially equal.

` operating levers forsaid pressure .nieans,

h'ingedly,connected to each other, and operating ineansf'or said levers. Y

Q. In a-ifrictional'screw press, the combination with Ian axially reciprocable screw spindle, and a fly wheel secured to one end Y thereof, ofoperating friction dises arranged substantially atright angles to the interme- ,diate fly wheel 'and staggeringly disposed in parallel spaced relation to each other, and 1 eiigageable with said fly wheel, rotating Y means for positively driving one of said frietion dises, a raw-hide gear connected to the positively driven friction discs, an operative. connection between said raw-hide. gear and .the other friction disc, aftwo-armed compressing lever for each of the two friction discs, and means for simultaneously operatv ing said, levers.

3. In a frietional screw press the combina- .tion with an axially reciproeable serewspinstantially equal two-armed eompressinglev rs for said dises outside thereof and o| erati vely and slidingly engageable therewil h, a link connection between the free ends ot said pair of levers, an operative lever system lo operate on said link connection, and 1n lans on the rain, operatively engageable with said operative lever system.

L1. In a frictional screw press, a movable head, a friction disk at one side of the head and movable into and out of driving engagement therewith, a plurality of friction disks at the opposite side of the head and arranged one above the other and movable together into and out of position for driving engagement with the head, a driving connection between the first-named disk and one of the secondnanied disks, a driving connection between theseeond-named disks, and means for simultaneously shifting the first-named disk and thev second-named disks in opposite directions relatively to the head.

5. In a Yfi'ietional screw press, a movable head, a friction` disk at one side of the head and movable into and out of engageinenti therewith, a pair of edgewise superposed friction disks at the opposite side of the head kand movable together into and ontof position for driving engagement therewith, a rotatable and slidable drive shaft earryimr the first-named disk and one of said pair otI disks, a second rotatableand slidable shaft carrying K' the other of said pair of disks, gearing between th'e shafts, and means for sliding said sha'l'tsI in the same direction in unison.

6. In a frietional screw press, a movable head, a pair of disks disposed at opposite sides of the'head and cou )led to rotate in unison and slidably monnte( for alternate engagement with and disengagement from the head, a third disk arranged edgewise in vertical alinement with and rotatable and slidablc with one of the first-named disks, and means for shifting thc disks.

In testimony whereof I allix my si gnature.

OTT() GERG.

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