US1869370A - Weighing machine - Google Patents

Description

Aug. 2, 1932. D. FINLEY WEIGHING MACHINE Filed Oct. 2, 1922 s Sheets-Sheet 1 INVENTOR DOZ/E'Q F/NLEY HUHHIIIIIXI Aug. 2, 1932. FINLEY 1,869,370

.WEIGHING MACHINE Filed Oct. 2, 1922 5 Sheets-Sheet 2 m lNVEN-TOR. N DOZ/EE F/NLEI A TTORNEYS.

Patented Aug. 2, 1932 STATES pmememee- 1 Dom-1m FIINLEY, or. BERKELEY,CALEFGBNEAQASSIGNORVBY ASSIGNMENTS, ro TOLEDO SCALE MeNUFAoT RrirG 0F roll-E130, OHIOQ-AECORPQRAJELION OI NEW I JERSEY WEIGHIZN'G MACHINE Appliea-tionjfilecl October 2, 1922. Serial No. 5531;694.

My invention relates to a Weighing machine and broadly stated the object of the variations from the standard in the Weight o f'i'thewe'b may 'be'noted, and the Condition causing such variations or the results arising therefrombe eliminated or caredfor.

The invention possesses other objects and features of advantage, some ofwhich, with the foregoing, Will be set forth in the following description of my invention. Itis tobe understood that I do not limit myself totheshowingmadeby the said description,

as I may adopt variant forms of my inve'n tron Within the scope of the claims.

Referring to the drawings, Fig. 1 'is a side elevation 'ofthe machine of my inyention, showing applied to a paper making ma ;chine of. which the last drying "rolland the 30 stack ofcalen dar rolls are shown. Fig. 2 is a 'verticah's'ectional view thru one of the bearings of the frame of the device. The plane of section isindicatcd by tl1eline2-2 of'Fig. 3. Fig.3 is a planiview of the-machine, a portion'heing broken out lon 'itudi- Iially to reduce the Width of the gures. Fig. 4 is aside elevation in diagram. Fig. 5fis a perspective view of one of the frame bearing brackets. Fig. 6'is a side elevation on alarger scale of the scale beaml Fig. 7 is a"'plahvi'evv of aportion of a record strip which may b'emadeloy my machine for permanent reference. Fig. 8 is an elevation of the counterweight 3 9 tal'ren in the direction o'fthe arrow 8 in Fig. Paper at the present time is usu on one of twotypes ofmachine, first, the

Fourdriniermachine infwhich thepaper pulp is "fiowed upon "a continuous Wire screen travellng 1n anappr'oxlmatelyhorizontal direcally made tion. Afterthe Water has been allowed to" drain from the ,pulp thru the meshes of the screen,"the sheetoffiberis picked off and car ried over-suction 'boXe's,-thru appropriate sets of press rolls and uponca series of steam heated drying rolls. From the dryingrolls the Web is generally passed thru a stack of calendar rolls to smoothand harden the surface of the paperi. After passing thruthe calendarrolls .the paper is Wound upon a reel 'until asuificient amount has accumulated.

The secondtype ofmachine is one in which the paperis formed against a revolving cylinder or cylinderscovered with Wire screening or mesh. The cylinders -revolve in vats continuously supplied with paper pulp. From'the cylinder or cylinderson which the matted fiber is formed a continuous sheet is picked off and passed over suctionbox'es andthru sets of press rolls onto dryers then thru stacks of calendar'rolls and onto a reel in a manner analogous'to that spoken of above,

Generally speaking,'allforms o'fpaper and roofingfelt's are ound up in large rolls or reelsa'fter having ;passedthru' stacks of calende'rs or coming from-the dryers. A large portion of paper board is .'likewise Wound in the rolls on reels. For convenience 'inhandling and shipping and in order tohave the paper or felt in as long sheets aspossible so that interruptions will not take-place when theipaper or felt islcarried thru subsequent operations, such asprinting orsaturation, or formation ofarticles made on machines having a continuous length ofpaper fed to them, it 1S ClSlrilOle to wind 1 3.8 much paper .ina

I makes reel and which must be made without breaks or splices renders it impossible for the manufacturer of the paper to check the weight of the sheet of paper at any time other than those periods when the continuous web of aper is broken after the filling of one reel and before the beginning of another. Frequently it is impossible to obtain a check on the weight of the paper during intervals of less than an hour. It is obvious that in one hour the weight of the paper per unit of area may change considerably without the knowledge of the machine operator.

Changes in weight of paper are brought about by supplying thicker or thinner pulp to the Wire screen of the Fourdrinier machine or the vats of the cylinder machine. It is obvious that if a thinner pulpis' supplied and the speed of the machine is not changed to correspond, this thinner pulp will have to cover the same area of Wire formerly coveredby pulp of a normal consistency, and therefore the sheet of paper produced will be lighter. On the contrary, a thickening of the pulp will cause the opposite results. Also if the pulp remains of the same consistency, and the motor or engine driving the paper machine increases or decreases its speed there will be a corresponding variation in the weight of the paper. As explained above these variations in weight of the paper do not become obvious to the machine operator unless the off weight paper appears at the reels at the very period when a trial sheet is taken from the end of a filled reel and weighed. Between such periods several Variations in the weight of the paper may ocour and they willonly be detected when the paper is being made up into the manufactured articles, or the quantity and quality of the paper is otherwise checked by a detailed examination of the rolls. discovery of such variation occurs at a time when no corrective measures may be taken.

It is naturally of immense value to have a permanent record made of the variations in weight of the paper in any roll. Paper normally is made into fabricated articles at a point distantly removed from the paper mill, and by workmen who have no knowledge ofanything which may have occurred during the making of any particular roll of paper. It is a fact that notwithstanding all attempts at the closest regulation of the weight of paper, variations will take place.

The object of my machine is not directly to prevent such variations, but to indicate to the paper machine operator when they have occurred, so that he may, so far as he is able, counteract each variation as my machine it manifest. As several hundred pounds of paper heavier than the normal weight being produced, or lighter as the case may be, will have been formed and will be disposed on the press section and the dryer In either case, the

portion of the paper making machine before the machine operator becomes aware of the excess or deficient weight through the indications of my machine, it is evident that the to know if the roll contains paper of excess weight or the reverse, and if so, where such off weight paper located in the roll, so the convertaing machinery may be correspondingly adjusted to handle the abnormal weights. Other reasons for knowing'in ad vance the weight per unit area of the paper in a roll suggest themselves, as for instance the entering of claims for allowances when paper is bought by a purchaser on specifications for weight, and it is not possible to check that weight, except superficially on the outer convolutions of a few rolls, until the paper is actually used, which may be months after the invoice has been paid as presented. While I have .here spoken only of rolls, the same may be taken to apply, in some measure, to bundles of boxboard, or other paper board. While the paper making machine operator may be able to check the weight of such board by taking samples from the cutter boxes immediately after it has passed the calender rolls, and therefore has no need of my weighing machine to keep him informed as to the weight of paper board being made drying roll and the first calender roll. The

construction of the frame is such that the web of paper passes continuously over or thru it, and means are provided for balancing the frame with its load of paper web against gravitational pull and against a slight turning moment which results from the tension on the web necessary to pull it thru the frame. Included in the frame is a scale beam and a weight recording mechanism; during the operation of the device and while the frame is in equilibrium, the position of a poise on the scale or the record made by the recording mechanism indicates the weight per unit of area of that particular web. If any variation of the weight of the web occurs, equilibrium of the frame is disturbed as soon as the varying web reaches the frame. Movement of the poise upon the scale to bring the frame once more to equilibrium indicates directly the weight per unit of area of the web then'onthe frame, and immediate Corrective measures, to restore thevthicknss of the web to the desired standard may be taken; or correspondingly the record of the vided, and the poise is at 50, the desired standard, when the paper :on the frameis of proper we ght and the frame is brought to balance. 'Cjorrespondingly ashifting coun terpoise is operated in conjunction with the recordmg mechanism to brlng the capacity of the entire weighlng mach ne within the scope-of the record strip in'accordance with.

the weight of the paper being produced. The rebalancin of the frame therefore after its equilibrium liasbec'n destroyed by variations in the weightiofthe web passing thru the frame or the record ontherecording mechanism thus gives a direct: indication of the weight per unit of area of theweb.

. Referring now to Figs. 1 and 3, my Weighing machine comprises a suitably formed base 2 in which is pivotally mounted the frame comprising the two side members 3' and 4: suitably connected intoa unitary 'structure by cross girts 6. As shown in Fig. 4, the pivotal axis of the frame is at theintersection of the lines 7' and 8;; Mounted on each side of the frame and slidably movable, in the line 8 above the axls 1s a ball bearing 9 adjustable in respect of the aizis by the hand wheel 11. .Journaled in the ball bearings is a roller 12 the peripheral surface of which lies nearly or slibstanti ally in the pivotal aids in a similar manner below the axis, and the web 14- of paper enters the pivotedframe over the lower roller and leaves the frame under the upper roller as shown in-Fig. 4.

The ideal condition would be to have'the web enter and leave th'eframe eXac l inthe pivotal axis, but since this is impossible, the rollers are adjusted as closely to the pivotal axis as is possible without causing the in- 5 coming and outgoing webs to rub."

In order to carry a considerable quantity ofthe web the frame is extendedfrom the pivotal axis and then turned substantially at right angles 1n the portion 15 in the" end of which a roller 16 .is journalled in ball bearings. Atthe angle of theturn in the frame rollers 17 and 18 are also ournaled 1n ball bearlngs and the web is threaded over these rollers as indicated in Fig. 3. A mannally adjusted friction brake19 is provided to control the rotation of the roller 16;

In orderthat the Web may be fed in a substantially horizontal plane into theframe v and 'be discharged from the frame ina sim- ",gijlai plane, idler r'ollers; 2l and22 are pro- A similar roller 13Vis mounted;

vide'd. (Both rollers 21 and 22 are slidably mounted for bodily movement towardan'd from the pivotal axis of the pivoted frame. The bearings of each roll'erar'e provided with springs 23 which resiliently press the roller outwardly away from the pivotal axis, thus the web from the drying roll 24 passes over the roller :21, over the roller 13 into the frame, over rollers 18, 16 and 17, then out of the frame under roller 12 to roller 22, thence to the calender rolls it is necessary to ma-in-' tain a considerable tension on the web "and of course this tension is greater between the roller 22 andthe calender rolls than between sion on the web entering the frame a'ndth-e web leaving the frame is the same,'the index arm will lie oppositezero on the scale. The springs pressing against the bearings of the rollers 21and 22 are of equal tensiomhence when the calender rolls are adjusted to place the web'under tension the difference in the tension of the webentering the frame "and leaving the frame may be read directly uponthe scale 28; i

It isnow apparent-that bearings must be provided for the frame, to carry not only the gravitational load, but also the tension on the web. Apairofbearing blocks are arranged" on each side of the frame, block 31 to carry the vertical thrust and block 32 to carry the horizontal thrust. These blocks are mounted on the base 2 in any suitable manner; 1X1? ranged on the frame on each side above the" bearing blocks is a bracket 33, Fig-5', in which are arranged knife edge bearings 34 and 35 engaged with he bearing blocks 31 and 32 respectively. As a precaution against unseating the frame from its knife edge bearings, a stud 36 on the end of the bracket ck tends thru a housing loop 87 on the base. The center of the stud lies in the axis of the fram'e'and during the normal operation of the frame the stud is out of contact with concentrated-iii the middle, as shown'be'st" in' Fig.8, and the screws 41 are providedwith hand wheels 42, and connected by a chain 43 running over suitable sprockets so that the screws are'co-ordinated and operable from either side of the machine. Rigidly fixed to the frame at the end of the arm 38 on one side is a scale beam 44 carrying the end poise 46 and the sliding poise 47. The scale beam is provided with a scale 48 detachably connected thereto in any suitable way and specially graduated to correlate with the standard weight per unit of area of the web which is to be passed thru the frame.

Specially proportioned weights are provided to be placed on the poise 46 in the usual manner and by adjustment of the counter weight 89, the loading of poise 46 and the adjustment of slidable'poise 47, the frame together with its web under tension may be brought into equilibrium about the pivotal axis.

Stops 49 are provided on the base to limit movement of the frame about the pivotal axis and a dampener is also provided for preventing too sudden movement of the frame. The dampener consists of a rod 51 hung on a knife edge 52 and adjacent the end of each arm 38. Each rod 51 is provided with a disk 53 at its lower end which is immersed in a bath of oil in the container 54. Thus sudden and irregular movements of the frame work are prevented without lessening its sensitive response to variations in weightin the web. In order to bring the center of gravity of the frame, with its rolls, to a proper position with relation to the pivotal axis so that the movable parts will have the required sensitiveness to small'changes in load and at the same time have a stability which will result in oscillatory movement when disturbed while in equilibrium, a weight 56 is mounted between jack nut 57 and lock nut 58 threaded on the bracket stud 59, one of which is fixed on each side member 3 and 4, of the frame. The position of these weights and their total mass, with their supports, when considered with relation to the downwardly turned portion 15, with the roll 16, and also with relation to the countermay be made to approach the pivotal axis by weight 39, and parts attached to arm 38, are such that the center of gravity of the entire system of members subject to oscillatory movement is below the pivotal axis in normal operation; but the center of gravity raising the weights. The vertical adjustment of the center of gravity, for convenience, should be provided for insuch amount that it may be brought actually into the line fof the pivotal axis, and then for normal working, disposed at a point far enough below the pivotal axis to result in a definiteness of oscillation satisfactory to the operator.

For making a permanent record of operations the recording elements shown in Fig. 1

are provided. A bracket 62 is aflixed to one side member of the base 2, and so positioned that the rod 51 passes through an opening in it. In that opening is slidably placed a sleeve 63 having a spline 64 to prevent rotation. Through the center of the sleeve the rod 51 passes with clearance all around at all times. The lower end of the sleeve is threaded, and engaging the thread is a hand wheel 66 which is rotatably mounted in bracket 62, with a suitable thrust collar. Fixed to the top of sleeve 63 is a plate 67, also with a clearance hole for the passage of rod 51. On plate 67 are mounted sprin s, 68 and 69, the upper ends of which may e made to bear on a plate 71 fixed on the rod 51, when the springs have been elevated by the hand Wheel 66. A short rack 72 is disposed on the rod 51 and a toothed sector 73 engagesthe rack and is mounted so as to give rotation to a spindle 74, mounted in a bearing 76, secured to a suitable part of the base 2. The spindle 74 adjustably carries a pointer 77 equipped at its end with an ink carrying marking point 78.

Substantially at right angles to the direction of swing of the pointer, and in the plane of the swing, a strip of paper 79 with suitable markings thereon is passed over a roll 81 and between rolls 82 and 83, the latter of which has an elastic surfacing such as a rubber cover, which is pressed lightly against the roll 82 which is driven by any suitable connection with a moving portion of the paper machine, so that the movement of the paper strip is always controlled by the paper machine and is in fixed ratio to the movement of the paper web. For example, the roller 82 may be driven by the bevel gears 84 connected thru the shafts 86 and 87 and suitable worm gearing to the drying roll 24. The character of the driving connections is such that the speed of the roll 82 is greatly reduced from that of the paper making machine. The surface of the roll 82 may be made to travel five feet while the surface of drying roll 24 may be traveling one thousand feet, but the drive is positive, so that each inch of the paper strip, in this case, would represent exactly sixteen and onethird feet of the paper produced on the paper making machine at the same time, though the speed of the paper making machine may have been varied during that time. The roll 82 may be actuated by clockwork mechanism, or by an independent motor under a speed governor, but I prefer the method of drive herein shown because it preserves a fixed ratio between the speed of the paper strip and the speed of the paper being made. After leaving the nip between rolls 82 and 83 the strip may be caught in a basket, or reeled on a roll. It may have indicia on it indicating the length of paper which has been made on the paper machine, or it may i in the machine.

-roll' or bundle of paper to which it corre spends. V y

A strip for recording the weight of '17 pound paper may be linedto show variations between 14 and 20 pounds.

A portion of such a strip is shown in Fig. 7. Also there is shown a record line 88 on this figure such as the inking point would make. At 89 the record line indicates that the paper being made at the time was about16 pounds in weight; at 91' the record line shows that the paper weighed about 18 pounds and at 92 that the paper was of normal"weightor 17 pounds.

While I have shown my machine in the general form illustrated in the drawings, I realize that its use on a paper making or paper using machine which continuously runsat high speeds would be attended with great difliculty, if not impossibility, unless suitable carrier means are provided to assist a the operator in threading the paper around andthru the several rolls and sets of rolls The employment of such carrier means is not herein described or illustrated, because it is considered extraneous to the elucidation'of the principle of my ma chine and furthermore, the installation of such carrier means on machines carrying a web' of paper is common practice and can be readily eifectedin my machine by one acquainted with the building, operation or setting up of machines for making orhandling webs of paper. k

For further illustration of the method of operation and use of my machine let us assume amachine in operation under the following conditions. Assume the average of the distances from the rollers 12 and 13' to rollers 17 and 18 to be eight feet, and the average ofthe distances from the rollers 17 and 18 to the roller 16 to be four feet. Assume that the web'is 110 inches wide as it passes over the rollers and that a tension of 1000 pounds is maintained on the entire width of the sheet as it passes over the springpressed roll 21, anda tension of 1060 pounds as the web passes over the spring-pressed roll 22'. As will be appreciated, this difference in tension at rolls 21 and 22 may be altered to suit the operator by the regulation of the manually adjusted friction brake 19.

Assume also that the weight ofpaper being produced by the paper making machine is 17 pounds'per 480 square feet. Assuming the circumference of the roller" 16' to be 36 inches, we have then the equivalent of a total of 17 y linear feet of web 110 inches wide acting downwardly on the lever arm about the pivotal axis of 96 inches. At the assumed: weight per unit of axea this represents a force of 5.68 pounds at the end of the lever arm, or a moment about the pivotal axis of54528 inch pounds.

Assume further that the springs 68 and 69 are not bearing on the plate 71, i. e. that the recording mechanism is not in operation. A

When the machine is in operation there is alsoanother moment about the pivotal axis which is" caused by the assumed pounds difi'erencein the draw between the portion ofthe web passing over the rolls 21 and 22 respectively. If the device were calibrated when no draw wasupon the sheet and then the 60' pounds subsequently were applied, such pressure would tend to turn the frame about the pivotal axis, acting with a lever arm dependent on'the closeness of the rolls 12 and 13"to each other. A sheet of paper weighing 17 pounds per 480 square feet is seldom if ever more than seventeen thousandthsof an inch thick. Allowing however for they unusual and for particles of dirt ada setting of'the rolls 12"and 13 at forty-one thousandths of an inch apart, thus bringing the neutral axes ofthe two webstwenty-three thousandths of an inch apart, which distance maybe said to be equivalent to the sum of the lever arms about the axis. A tension of 60 pounds on this lever arm produces a moment of 1.38 inch pounds.

3 If the weight of the paper passing thru the device increases' by one pound per 480 square feet the momen-t'about the axis is raised by one seventeenth 'or 32.07 inch pounds which-is approximately twenty-two times as great as the 1.38 inch pounds produced by the difference in the tension on the web. That is to'say that it would take adifference in tension ofabout 1395 pounds to equal in effect an increase of one pound perv 480. square feet of web. Of course any such change in the tension of the paper could not take place since the rolls in the frame over which the web passes are nearly frictionless. Therefore, it is plain that variations in weight of paper, and not irregularities in thetension of the web, will be the predominating influence ineffecting movement abontthe pivotal axis.

In the scale beam 4 1-, as shown in Fig. 6, is a scale preferably graduated to indicate in its length atotal difiierence in weight of 6 pounds.

60 pounds in tension between the portions'of the web passing over the rolls 21 and 221espectivelyand with the poise 47 at 17 on the scale and the poise4'6 loaded and the counter weight 39' adjusted so that the frame is in equilibrium about the axis, the poise47 Indi- .cates the Weight of the paper then being passed thru the frame. If, for any reason, theweight per unit of area of theweb changes, the equilibrium of the system is disturbed. The operator then by observing the scale 28 adjusts to approximately pounds the tension of the web, if necessary, and then rebalances the frame by movement of the poise .47, which in its new position evaluates directly the weight of the web. Suitable correctlve measures may then be taken to bring the web back to the standard weight. So long as equilibrium of the the frame is undisturbed there is no appreciable variation in the weight of the paper passing thru the frame, and if disturbedit is the work of but a moment to ascertain the exact variation from the normal weight. It is thus possible with my machine to maintain a continuous check upon the entire roll of paper and when minor variations occur promptly correct them so that a sheet of substantially uniform weight may be produced. I

For difierent weights of paper a different scale and weights correlated to the paper weight are used and it will readily be seen that with properly proportioned weights and a scale correlated to the unit weight of web to be made the device may be prepared so as to indicate not only different weights, but also weights figured on different systems of paper measure. I v p It is almost universal practice. to manufacture paper webs uniform in'width and it is i unlikely that my device would be calibrated for determining weight per unit length, rather than per unitarea, of paper. The use of the phrase, per unit length in the accompanying claims-is an expedient resorted to merely for the purpose of absolute definiteness of expression therein; it being obvious that if the width of web were variable no direct indication of Weight per unit area wouldbe given by the device herein disclosed. It is understood of course, that the choice of calibration as between weight perv unit length and weight per unit area depends upon the use to which my device is put, and does not concern the fundamental invention involved.

Having described the action of my weighlng machine when it is called upon merely to indicate to the operator when, and by what amount, the paper web varies from the nor- ,mal weight, I shall now show how it may also produce a permanent record indicative of the actual weight, part by part, of any roll or bundle of paper or board made on a paper machine to which it is attached. V I

' The operation of the mechanism when the recording device is in use is as follows: If

around the pivotal axis. The handwheel 66 is turned so as to raise the springs68 and 69 swam to maximum. The rod 51 and the partsaffixed thereto are presumed to be far beyond the'range of any lifting force to be applied bythe springs 68 and 69, whereby the weight might at any time, be raised free from knife edge 52, and in order to secure stability to 3 the system it may be advisable to make the parts heavier than the proportions of the drawings indicate. The counter-weight 39 is brought to such a positionby handwheel 41 that the pointer 7 7 and inking point 78 indicate a weight of 17 pounds on a properly marked strip of paper arranged on the rolls 81 and 82, assuming that the same weight of paper is being manufactured as has been used for illustration'in the example above given. It is assumed that this setting of the pointer corresponds to a mid-position of the frame with regard to oscillation; themotions of pointer 77 and frame 34 proceedtogether; if the pointer is at mid-position when the frame is at mid-position at one time, then they should correspond in position at all-other times and regardless ofthe weight of paper web on the structure or the positioning of counter-weight. The pointer 77 is adjustably j mounted on the spindle 74 merely for convenience in setting up the machine in the first instance, and, in operation, to correct some slight lack of register with the printed lines on the" paper strip, or purposely to set the pointer off the center line on the strip and make it follow some one of the lines which are off center. I v

The weights 56 may be lowered if desired, to lower the'center of gravity of the entire system, and thus relieve the springs 68 and 69 of a portion of the work of responding to the excess weight (or the reverse) which may be brought on the paper carrying portion of the, frame by paper so much overweight (or also. by the length of the springs 68 and 69 and by their resiliency. A definite calibration of the springs and the center of gravity is necessary to the determination of definite weight lines or markings onthe recording paper strip.

It is desirable to use a width of paper strip, and to arrange for a maximum swing of the pointer suchthat all ordinary variations of I predetermined portion of a web, means for the paper weight will be indicated without the inked record line passing beyond the edges of the paper.

It isunderstood that the arrangement of parts as I have shown them in the drawings anddescribed them doesnot comply exactly with the conditionsrequired in the-construction of scales in that a large proportion of the material to be weighed in my machine isestablished in fixed relation to the bearn-- i. e. the load is not suspended; from the beam by knife edges or rested upon it thru the.

intervention of a knife edge supported platform. To comply to the conditions of standard. scale construction, the downwardly turned portion of the frame at-15, supporting the roll 16 and carrying the paper 1 1, should be suspended from the frame at a point approximatelymidway between the active portions ofthe' peripheries of rolls 17 and 18" which. point should lie on or slightly below the line 7, and the suspension should be by knife edges. A load applied to a beam with a suspension of this type does not materially alter the center of gravity of the oscillating system. The lossof sensitiveness which results from. my construction-is small, however. It may be minimized by allowing only a smallamplitude of oscillation to the system, by making the downwardly disposed portion 15 of the frame proportionately small as comparedv to the distance from the pivotal axis to the rolls 17 and lVhile I have described my machine as he ing-used inconnection with a paper manufacturing machine, it may, with perfect satisfactiombe used in connection with any type of paper using. machine, where the paper is supplied in rolls, as,.for instance, a printing press. This permits the user of paper to check the weight of the paper passing tliroughhis machines without having to stop the machines to take a sample for weighing. It permits him to establish arecord of the weights of paper in all the rolls of a ship ment so that he may substantiate claims which he may makefor underweight or overweight and it gives his machine operators opportunity to adjust their machines to variationin weight of the paper web before the paper of abnormalweight has reached the operating part of the machine.

I claim:

1.. In a machine of. the class described, a pivotally mounted frame for supporting a predetermined portion of a web, means for causing the web to travel continuously over said frame, means for balancing said frame when a Web of given weight per unit of length is passing thereover, and means for indicating the'weight per unit of length of the web on said frame 2. In a machine of the character described, a pivotally mounted frame for supporting a causing the web to travel continuously over said frame, means for balancing said frame when a web of given weightper unitwof length is passing thereover,.a graduated-scale on said frame, and means for indicating on said scale the weight per unit of length of the web on'the frame. a

.3. In a machine'of the character described, a pivotally mounted frame for supporting a predetermined portion of a web, means for causing the web to travel continuously over said frame, means for balancing said frame when a web of given weight per unit of length is passing thereover, a plurality of interchangeable graduated scales for said frame, each scalecorrelated to a particular weight per unit of length of web, and means for indicating on said scale the weight per unit of length of the web on said; frame.

4. In a. machine of the character described, a pivotally mounted framefor supporting a predeterminedportion ofa web, means for causing the web to travel continuously over said frame, means for balancing said frame when a web of given weight per unlt of length 1s passmg thereover, a. graduated scale; on

said; frame correlatedto a standard weight per unit of length of web, and means for indicating on said scale the weight per unit of length of the web on said frame.

5. In a. machine of the class described, a pivotally mounted frame, rollers over which a web may be passed arranged in said frame, means-for balancing said frame when a web of given weight per unit of length is passing thereover, a graduated scale on said frame correlated to a standard weight per unit of length of web, and a poise on said scale movable thereon to indicate the weight per unit of'length of said web.

6. In a machine of the character described, a pivotally mounted frame for supporting a predetermined portion of a web, means for causing the web'to travel continuously over said frame, means for balancingsaidframe when a web of given weight per unit of length is passingthereover, a graduated scale on said frame, means for indicating on said scale the weight-per unit of length of the web on the frame, and means for dampening the movement of said frame.

i. In 'a machine of the class described, a pivotally mounted frame, means for causing a web to be drawn continuously over said frame entering and leaving said frame in lines which lie substantially in the axis of the pivots of said frame, means for balancing the frame when a web of given weight perunit of length is passing thereover under a given tension, and means for indicating directly the weight per unit of length of the web. on said frame.

8. In a machine of the class described, a. pivotally'mounted frame, means for drawing a web over said frame continuously, means for balancing the frame against gravitational pull and the turning moment induced by the tension on the web, means for the direct indication of the weight per unit of length of said web, and means for the direct evaluation of the tension on said web.

9. In a machine of the class described, a pivotally mounted frame, means for drawing a web over said frame continuously, means for balancing the frame against gravitational pull and the turning moment induced by the tension on the web, means for the direct indication of the weight per unit of length of said web, a roller for directing said Web to 'said frame, a rollerfor directing said web from said frame, and means for indicating the difference in tension on the web as it passes over said rollers;

In a machine of the class described, a pivotally mounted frame, rollers in said frame over which a web may be passed, a pair of'rollers between which said web enters and leaves said frame journalled in said frame, one above and one below the pivoted axis of said frame and with their peripheral surfaces lying nearly in said pivotal axis, means for balancing said frame, and means for the direct indication of the weight per unit of length of said web. I r

11. In a machine of the class described, a pivotally mounted frame, rollers in said frame over which a web may be passed, a pair of rollers between which said web enters and leaves said frame journalled in said frame, one above and one below the pivotal axis of said frame and with their peripheral surfaces lying nearly in said pivotal axis, means for drawing said web thru said rollers, means for balancing the frame against gravitational pull and the turning moment induced by the tension on the web, and means for the direct indication of the weight'per unit of length of said web.

12. In a machine of the class described, a pivotally mounted frame, rollers in said frame over which a web may be passed, a pair of rollers between which said Web enters and leaves said frame ournalled in said frame, one above and one below the pivotal axis of said frame and with their peripheral surfaces lying nearly in said pivotal axis, means for drawing said web thru said rollers, means for balancing the frame against gravitational pull and the turning moment induced by the tension on the web,'means for the direct indication of the wei ht per unit of length of said web, and means for indicating the difference in tension on the web as it passes into and out of said frame.

13. In a machine of the class described, a

pivotally mounted frame, rollers in said frame over which a web may be passed, a pair of rollers between-which said web enters and leaves said frame journalled in said frame,

one above and one below the pivotal axis of said frame and with their peripheral surfaces lying nearly lll'SZllCl pivotal axis, a spring pressed roller for directing said web to said other spring-pressed roller to indicate on said scale the difference in tension on the web as it passes over said springpressed rollers, means for balancing said frame, and means for the direct indication of the weight per unit of length of said web.

14. In a machine of the class described, a pivotally mounted frame, rollers in said frame over which a web may be passed, a pair of rollers between which said web enters and leaves said frame journaled in said frame one above and one below the pivotal axis of said frame and with the1r peripheral surfaces lying nearly in said pivotal axis, a sprlngpressed roller for directing said web to said pair of rollers, a spring-pressed roller for (11- means for the direct indication of the weight per unit of length of said web.

15. In a machine of the character described, a pivotally mounted frame, means for causing a web to travel continuously over'said frame, means for balancing said frame. when a web of given weight per unit of length is passing thereover, a graduated scale on said frame, means for indicating on said scale the weight per unit of length of the web on the frame, and means for continuously recording said weight.

l6. In a machine of the character described, a pivotally mounted frame, means for causing a web to travel continuously over said frame, means for balancing said frame when a web of given weight per unit of length is passing thereover, a graduated scale on said frame, means for indicating on said scalethe weight per unit of length of the web on the frame, a record strip, means for moving the strip in time with the movement of the web, and means for tracing a'line on said strip continuously corresponding to the weight per unit of length of the web on said frame.

17. In a machine of the character described, a pivotally mounted frame, means for causing a web to travel continuously over said frame, means for balancing said frame when a web of given weight per unit of length is Weight per unit of length of the Web on the frame, a record strip, means for moving the strip in time with the movement of the web, means for tracing a line on said strip, and means for moving said tracing means across said strip in amount and direction corre sponding to the pivotal movements of said frame.

18. In a machine of the class described, a frame for supporting a predetermined portion of a web, means for causing the Web to travel continuously over said frame, and means for continuously recording the weight per unit of length of the web on said frame.

19. In a machine of the character described, a pivotally mounted frame for supporting a predetermined portion of a web, means for causing the web to travel continuously over said frame, means for balancing said frame, a record strip, means for moving the strip in time with the movement of the web, and means for tracing a line on said strip varying from a straight line as the weight per unit of length of the web varies from said weight When the frame is in balance.

20. In a machine of the class described, a pivotally mounted frame, means for drawing a web continuously over said frame, means for balancing said frame as to the factors of weight of and pull on said web, means for indicating the Weight of the web on said frame, and means for resiliently resisting the pivotal movement of said frame from a predetermined balanced setting.

21. In a machine of the class described, a pivotally mounted frame, means for drawing a web continuously over said frame, a weight acting in one direction and a spring acting in the other direction for balancing said frame with the web thereon, and means for recording pivotal movements of the frame in terms of the weight of the web thereon.

22. In a device of the class described, means for supporting a predetermined portion of a moving strip of material, and means connected to said supporting means for indicating the variations in weight per unit length of said strip.

23. In a machine of the class described, a movably mounted frame for supporting a predetermined portion of a web, means for causing the Web to travel continuously over said frame, means for balancing said frame, and means for indicating the weight per unit length of said web.

24:. In a machine of the class described, a movably mounted frame for supporting a predetermined portion of a web, means for causing the web to travel continuously over said frame, means for balancing said frame, and means for indicating the variation in weight per unit length of said Web.

25. In a machine of the class described, a movably mounted frame for supporting a predetermined portion of a web, means for drawing the web over said frame continuously, means for balancing the frame against gravitational pull and the turning moment induced by the tension on the Web, and means for the indication of the Weight per unit length of said web. I

26. A weighing machine comprising .in combination, a support, means for continuously subjecting said support to the weight of a definite length of moving sheet fabric, means for balancing the weight of the fabric thus supported, and means controlled by said balancing means for recording variations in the weight of said fabric.

In testimony whereof, I have hereunto set my hand.

DOZIER FINLEY.

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