US2146277A - Apparatus for grading leather, etc. - Google Patents

Apparatus for grading leather, etc. Download PDF

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US2146277A
US2146277A US22945A US2294535A US2146277A US 2146277 A US2146277 A US 2146277A US 22945 A US22945 A US 22945A US 2294535 A US2294535 A US 2294535A US 2146277 A US2146277 A US 2146277A
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indicator
leather
selector
actuating
strips
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US22945A
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Wilson Evan George
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Wilson Evan George
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical means
    • G01B5/02Measuring arrangements characterised by the use of mechanical means for measuring length, width or thickness
    • G01B5/06Measuring arrangements characterised by the use of mechanical means for measuring length, width or thickness for measuring thickness
    • G01B5/068Measuring arrangements characterised by the use of mechanical means for measuring length, width or thickness for measuring thickness of objects while moving

Description

Feb. 7, 1939. E. G. WILSON 7 2,145,277
I I APPARATUS FOR GRADING LEATHER, ETC
. Filed May 25, 1955 6 Sheets-Sheet l WITNESSES E. ca. WILSON Feb. 7, 1939 APPARATUS FOR GRADING LEATHER. ETC
Filed May 25, .1955 e Sheefs-Shwt 2 6 SheetsSheet 3 mmf/vfoef E. G. WILSON Feb. 7, 1939.
APPARATUS FOR GRADING LEATHER, ETC
Filed May 23, 1955 F eww E. G. WILSON Feb. 7,1939.
APPARATUS FOR GRADING LEATHER, ETC
Filed y 25, 9 5 s Sheets-Sheet 4 irvvNToR.
Feb. 7, 1939.
nu l I all Feb. 7, 1939,
HHHHB E. G. WILSON 2,146,277 APPARATUS FOR GRADING LEATHER, ETC
Filed y 25, 1955 e sheets-sheet 6 w [TA/5.955s
IN VE IV 7' OR Patented Feb. 7, 1939 APPARATUS FOR GRADING LEATHER, ETC.
Evan George Wilson, Blundellsands, near Liverpool, England Application May 23,
1935, Serial No. 22,945
In Great Britain June 2, 1934 9 Claims.
This invention relates to the grading or selection of leather and other suitable materials or substances in sheet form (all hereinafter for convenience, referred to as leather), and has for its object to provide apparatus whereby such sheets which are of varying thicknesses throughout, may be measured and the thicknesses of each individual sheet indicated or charted at convenient steps or stages of the measuring, so as to enable or permit, in a ready and convenient manner, selection of sheets most suitable for any particular use or intended purpose. Moreover, the apparatus is capable of large output capacity and operation by unskilled or semi-skilled labor, and issimple and accessible in construction and of neat and compact design.
Grading or selecting apparatus, according to my invention, is characterized in that it includes feeler elements adapted to operate upon the leather and a graduated or otherwise suitably marked chart or scale, or the like; and means between each feeler element and said chart or scale, or the like, for automatically selecting and individually operating a series of indicator strips, fingers, markers, or the like, in response to the movements of respective feeler elements and in such fashion that said markers, or the like, appear on or register with or/and mark the chart or scale, or the like, and-by observation of the various-readings shown by the markers-provide or/and record visual indication of the thicknesses of a sheet of material acted upon by the apparatus. Thus information as to the suitability or otherwise of a sheet for a particular purpose may readily be ascertained by mere inspection of the chart or scale, or the like. The markers themselves may be returned to their original positions after operation by hand or by suitable delay control means.
In one arrangement under my invention, there are provided feeler wheels or discs adapted to be yieldably and independently maintained in contact with the surface of a sheet of leather immediately above feeding rollers or spindles protruding above a table, or the like; a bar or equivalent selector located above each feeler wheel and adapted to be reciprocated within predetermined limits in a horizontal plane-and in response to the vertical displacement of said feeler wheelby mechanism operatively connecting the latter with said selector; means located below the selector and adapted to reciprocate the same in a vertical plane at suitable predetermined intervals; an actuating element carried by said selector; a scale or chart provided with a series of horizontally spaced graduations, mounted in any convenient position with respect to said actuating element; a series of horizontally spaced indicator strips, fingers, markers, or the like, provided with vertically spaced graduations adapted to move in register with said horizontally spaced scale readings of the chart; and mechanical means, such, for example, as spring pawl and rack devices associated with pivotal link frame or lever structures, whereby individual indicator strips may be longitudinally projected by step-motion over or in front of said chart or scale through upward projection of said actuating element in response to vertical displacements of the selector which carries the latter. Preferably, a separate indicator strip or marker is provided to co-operate with each horizontally spaced graduation of the scale or chart, and individual mechanical means or devices are associated with each strip or marker, such devices being conveniently arranged side-by-side above said actuating element of the selector, so that any strip or marker may be operated by said actuating element (which, of course, reciprocates in a horizontal plane below said mechanical actuating devices conjointly with the selector) according to the position of said actuating element at the moment of a vertical displacement of the selector. A suitable counter, or the like, is preferably associated with the scale or chart and which counter is adapted to indicate the total number of step-motions or registrations imparted to individual strips or markers.
I will further describe my invention with the aid of the accompanying sheets of explanatory drawings which illustrate, by way of example only, one mode of embodying same.
In said drawings:-
- Fig. l is a side sectional elevation, and Fig. 2 a front view with parts broken away, of apparatus constructed in accordance with the invention.-
Fig. 3 is an enlarged side elevation of indicating mechanism detached from the apparatus, and
Fig. 4 is a plan view of Fig. 3.
Fig. 5 is a further enlarged side elevation of a portion of the mechanism illustrated in Fig. 3, and Fig. 6 is a front view of same with a cover plate and indicator strips removed.
Fig. 7 is a cross-sectional elevation (drawn to a scale similar to that of Figs. 5 and 6) taken as on the line A-A Fig. 3 and viewed in the direction indicated by the arrow.
Fig. 8 is a rear view, with parts broken away, illustrating the ratchet drum and mechanism embodied in Fig. 5 for the purpose of operating the adding or totallizing device of the recording apparatus.
Fig. 9 is an enlarged detail elevation of an actuating arm mounted upon its selector bar, and Fig. 10 is a plan view illustrating in diagrammatic form the cam roller arrangement for operating the actuating arms.
In the several views like characters of reference denote like or equivalent parts wherever they occur.
Referring to the drawings, l designates feeler wheels or discs rotatably mounted on lateral arm 2 of bell crank levers 2, 3 which are fulcrumed upon a common shaft 4 having its opposed ends affixed to side members 5 of the apparatus. The longer upstanding arms 3 of levers 2, 3 are fitted at their upper ends with adjusting means comprising springs 6 and floating sleeves l whereto are connected ends of horizontal link rods 8 the opposite ends whereof are pivotally secured at 9 to vertically positioned links H), which latter are also pivotally mounted upon and suspended from a horizontal shaft ll disposed between upper portions of side members 5. The lower ends of said links l are pivotally articulated at 2 to lateral coupling rods [3, the other ends whereof being similarly connected at M to reciprocatory selector bars l each of which is adapted to move horizontally between spaced supporting and guide rollers I 6 disposed upon spaced rods ll secure-d to side members 5.
Said feeler wheels I are yieldably and independently maintained in contact with the surface of a sheet of leather passing below same under the pressure of helical springs l8 disposed around upper portions of guiding rods [9 which are slidably located in passages formed in blocks 20 aflixed to the framework of the apparatus; said rods l9 being pivotally connected at 2| with the outer free ends of lateral arms 2 of bell crank levers 2, 3.
Positioned immediately below each feeler wheel I is a feeding roller 22 mounted upon, and adapted to rotate in conjunction with, a horizontally disposed driven shaft 23 which is located in bearings provided for its reception in side members 5: said rollers 22 protrude above the surface of a table 24.
It will thus be apparent that the feeler wheels i will be individually and vertically displaced in response to varying thicknesses of a sheet passing between same and feeding rollers 22, and, by oscillating their respective carrier levers 2, 3, impart, through the medium of their associated connecting links 8, l0 and i3, corresponding reciprocatory motion to the horizontally movable selector bars l5.
Disposed below each selector bar [5 are pairs of oppositely rotated discs 25 (see more particularly Figs. 1 and fixed to shafts 26 mounted in bearings provided in side members 5. Each pair of discs 25 are provided with crank pins 2'5 whereon are fitted rollers 28 which are adapted to simultaneously bear against and act upon the underside of their particular selector bar l5 and so impart vertical reciprocatory movement to same in parallel planes.
Each selector bar I5 is successively raised by its associated pair of discs 25 with rollers 28, because in their rotative order each particular pair of crank pins 21 are off-set for such purpose-the arrangement being as shown in Fig. 10-so that each selector bar I5 is vertically displaced in turn during a complete revolution of shafts 26 which, through a train of toothed wheels 29, are caused to rotate (being driven by any suitable power source) in opposite direction to each other, and lateral displacement of the selector bars I5 by the movement of the rollers 28 when raising their particular selector bar 55 is prevented. Upon one of said shafts 2Si. e. the driving shaftthere is secured a sprocket wheel 35see Fig. 2-around which is disposed a chain 3! adapted to drive a sprocket wheel 32 secured to driven shaft 23 which rotates the leather feeding rollers 22.
Carried by each selector bar 85, and preferably in an intermediate position thereon, is an actuating or striker element 33 consisting of a small bevel wheel or roller 34 mounted at the upper end of an arm 35 which is attached at its lower end to a horizontal carrier 35 mounted upon springs 31 disposed about vertical rods 33, and to the upper portions of rods 38 there are secured ends of lateral springs 39 which are connected to opposed sides of arm 35: thus arm of said actuating element 33 is rendered flexible and capable of yielding both laterally and vertically to the requisite extent: in lieu of said roller 34 the upper extremity of arm 35 may be suitably pointed or champered.
Rollers 34 of actuating elements 33 are adapted to move underprior to engaging with-any one or" a series of parallel and horizontally arranged guiding rails or bars 40 which are disposed immediately above said elements 33, the side components of said bars 43 being champered at their lower longitudinal edges 46 in order to receive the correspondingly shaped peripheries of the rollers 34 when engaging therewith: said side components are spaced apart and secured together by means of distance pieces 40 and rivets, as illustrated more particularly in Fig. 9.
Coinciding with said distance pieces 46* and positioned between each built-up bar 40, 40 40 are a series of spacing and guiding plates ll which are fixed upon common cross rods M and formed with central recesses M in horizontal alignment with each other and also with rollers 34 of actuating arms 35; said recesses 4i having' upper inclined knife edges 4| in order to deflect the rollers 34 onto the champered edges 40 of the side components of bars 40, so preventing the rollers from riding along said knife edges 41 if ten-ding to do so.
The ends of bars 40 are individually and pivotally connected by means of pins 42 to the lower portions of inclined levers 43, 44 which are centrally swivelled about respective common axes 45, 45 the upper ends of said levers 43, 44 being independently and pivotally secured by means of pins 46 to opposed ends of connecting links 47 which ensure correct parallel movements of bars' 46 in a vertical plane upon actuation of the individual pivotal link frame or lever structures which pivot about their common axes 45, 45 by upward movement of the actuating elements 33 when engage-d by the rollers 34 thereof: lower extensions 43 of levers 43 are located within a common channel 48 formed in a bar 48 transversely secured between side members 49 of a frame 50 provided to house the series of link structures. Attached to said extensions 43 of levers 43 are ends of coiled springs 5!, opposed ends whereof are secured to cross bar 48 in a manner that ensures the return of bars 43 when operated after the descent of actuating elements 33.
Disposed about the common axis 45 and fixedly secured to levers 43 are base portions of arm members 52 which extend upwardly at right an- 'gles from said levers 43 and carry at their upper extremities a series of pivotal pawls 53 andbetween these and levers 43-a further series of pivotal pawls 53 The pairs ofpawls 53, 53 have their lower arms 54, 54* coupled together by coiled springs 55-see Fig. --which normally and individually maintain said arms 54 of pawls 53 against a transversely positioned and pivotally mounted common stop bar 56 and arms 54 of pawls 53 in abutment with a similar stopbar 51, said stop bars 55, 51 being pivotally connected by means of crank arms 58 to a link 59 positioned adjacent a side 49 of frame 59: said link structure 58, 59 is operated by a slidable handle 50 secured to an external portion of the link structure pivot 61.
Said handle 55 when operated moves stop bars 56 and 51 away from each other, and another stop bar 62 attached to link 59 by means of crank arm 52 is positioned against the lower ends of arms 63 of holding pawls 64 pivotally mounted upona common rod 65 transversely secured to sides 45 of frame 50, said arms 63 being individually held in abutment with stop bar 62 by extension springs 66 attached thereto and to a common slotted bar member 66 secured to sides 49 of frame 5!): the slots 66 of bar 55 slidably house and locate arm members 52. Stop bars 55, 62 in their operative movement against arms 54, 63 move pawls 53, 64 out of normal engagement with the toothed rear portions of a plurali y of indicator strips or markers 5'! in juxtaposition with each other and independently and slidably mounted within a carrier frame 58 secured to sides 49 of frame 59. Said indicator strips 51,
being thus released, slide down by gravity when resetting, so that their lower end portions come to rest upon the common bed portion of carrier frame 68. The strips 61 bear upon their upper surfaces 69 a plurality of vertically spaced char acters or markings (not shown) which are thus carried behind a scale or chart constituted by an index plate Ill adjacent a transverse slot or window 1| formed in front plate 53* of frame 55. Said index plate ll! also bears horizontally spaced characters or markings Iii each of which registers with the series of vertically spaced characters carried by indicator strip 57. An additional or supplementary index plate M -similar to index plate "w -and transverse window H may be provided as illustrated in Fig. 4 to register wi h the projecting portions of the indicator strips 61 so that by comparing the various projecting portions of the strips 51 with the registering markings of the index plate lil an indication of the proportionate thicknesses of a sheet is available.
The scales H3 and 10 are both graduated in irons, horizontally. so that each of the graduations which shows the various thickness-es of the leather registers with one of the indicator strips 61. Each of these strips 5'! is numerically graduated and is projected longitudinally in register with one of the horizontal thickness graduations w of the indicator 153. For instance, if one strip 61 has been actuated five times as number 5 carried on this strip will appear in window H in register with a thickness graduation m of indicator H1, thus an observer will see that five points on the leather at which gauging has been effected are this thickness. In this manner all the strips 61 are actuated in accordance with the varying thicknesses of the leather.
The strips 51, thus actuated, will also appear,
within "the window H projected at various heights beyond the supplementary index plate lll to provide a visual indication-in a graphical fashionof the proportionate thicknesses of the hide operated upon by the machine.
Simultaneously with the release of pawls 53, 64 pawls 55 disengage from the teeth of a common ratchet drum l2 secured to a shaft 13 transversely mounted between sides 49 of frame 58. One end of shaft 13 projects through a side 49 and is adapted to operate a counter 'M-in the form of a disc having spaced 'circucmferential markings le disposed adjacent the face of said side 49. The counter is housed within a casing or cover it provided with a window or opening The opposite end of shaft '53 extends through its adjacent side 49 of frame 58, and secured thereon is a winding pulley or drum 15 around which there is coiled a portion of a rope or chain l6, to the free end of which there is fixed a Weight (not shown) which returns the counter through the medium of gear wheels 13 13 to its normal zero reading in the resetting operation.
Drum i5 is provided with a ratchet wheel Tl integral therewith and which is normally engaged by catch l8 of a holding lever l9 pivotally attached at its lower end to a side 49 of frame 50 by means of a coiled spring 88, so that when link 59 is moved upward by crank arms 58 an extension 59 strikes holding lever l9 and causes catch #8 to disengage from ratchet wheel l! to free ratchet drum l5 for re-setting as before described: by this arrangement drum l2, shaft 13 and counter M can only be rotated by step-motion.
In operation, as a sheet of material is passed over feeding rollers 22 of table 24, feeler wheels I, being independently maintained in contact with the adjacent surface of the moving sheet by means of springs is, will individually move up and down in accordance with variations or unevenness in the thickness of the sheet, to cause oscillation of their respective bell crank carriers 2, 5, which, in turn, and through the medium of the coupling links 3, ill and i3, horizontally reciprocatein response to the vertical displacements of the feelers l--the selector bars l5 and their actuating arms 35. Simultaneously, opposed pairs of the crank rollers 28 of discs intermitten ly and successively engage with respective selector bars l5 consequent on the off-setting of respective pairs of crank rollers 23, to cause, by such engagement, intermittent vertical displacements of bars 55 and so the actuating arms mounted upon same. Consequent on each upward displacement of individual actuating arms 35, the particular bar ii! of the vertical frame or lever structure in vertical alignment with the actuating arm 35 now operating is engaged by the latter and raised and swivelled forward within adjacent spacing plates 4! about its axes 45, 45 accordingly, so imparting-through the medium of its associated parts and pawl 53-limited step motion to the particular toothed indicator strip 51 engaged by said pawl 53 consequent on abutment of extension it of lever 43 against a side of channel 38 said strip being held in such position by its associated pawl 65. In this manner, each actuating arm 35 is moved by its selector bar l5 (during a complete revolution of driving shaft 25) underneath and horizontally across the series of bars 45 in order to automatically select and operate any one of same, according to-the vertical displacements of individual feeler wheels I as a sheet of leather is being passed under same and consequent on the varying thickness thereof.
The indicator strips 61, thus moved upwardly in carrier frame 68, appear with the characters they bear for observation through transverse window or slot ll, each character being in register with a horizontal graduation I'll of index plate 10. At the same time, each step-by-step movement of each indicator strip 61 has been imparted to counter 14 (consequent on pawls 53 imparting step-motion to ratchet drum 12) which shows a reading through casing opening 14 to indicate the total number of registrations or movements as they are made by the series of operated indicator strips 61.
On noting the readings of each particular indicator strip 61 in conjunction with the registering graduations '10 of the index plate 10, an observer will be aware of the number of points at which gauging has been effected and the thicknesses of the leather at these points, as each step movement of individual strips 6! constitutes one point of gauging and the registering mark of the index plate 10 indicates the thickness of the leather at such point.
The indicating strips 61 and counter 14 are re-set to zero positions by means of handle 60 as hereinbefore described.
It will be obvious that any other suitable mechanism may be utilized between the actuating elements 33 and the indicating strips or markers 61 and counter 14, to attain the object of my invention; also, with the aid of some such modified mechanism the indicator strips may be arranged to operate in any desired angular position from vertical to horizontal. Further, whilst, for convenience of description, my invention has been described with reference to the employment of a plurality of feeler wheels and parts associated therewith, I desire my claims to include apparatus adapted to the use of a single feeler wheel only.
What I claim as my invention and desire to secure by Letters Patent is:--
1. Apparatus for use in the grading or selection of leather according to thickness, characterized in that it includes feeler elements adapted to operate upon the leather in such manner as to rise and fall with same due to varying thicknesses, and a graduated indicator; a series of indicator strips adapted to register with said indicator; and means, movable to positions to actuate any of the indicator strips, disposed between each feeler element and said indicator for automatically selecting and individually operating said indicator strips only when the particular thickness for that strip causes said means to be brought into corresponding position in response to the movements of respective feeler elements and in such fashion that said indicator strips register with the indicator to provide visual indication of the thicknesses of a sheet acted upon by the apparatus.
2. Apparatus for use in the grading or selection of leather according to thickness, comprising feeler wheels adapted to be yieldably and independently maintained in contact with the surface of a sheet of leather immediately above feeding rollers; a selector bar located above each feeler wheel and adapted to be reciprocated within predetermined limits in a horizontal plane and in response to the vertical displacement of said feeler wheel by mechanism operatively connecting the latter with said selector; means located below the selector and adapted to reciprocate the same in a vertical plane at suitable predetermined intervals; an actuating element carried by said selector; an indicator provided with a series of horizontally spaced graduations; a series of horizontally spaced indicator strips provided with vertically spaced graduations, adapted to move in register with said horizontally spaced readings of the indicator; and mechanical means whereby individual indicator strips can be longitudinally projected by step-motion to register with said indicator only when the particular thickness for that strip passes beneath the feeler elements and through upward projection of said actuating element in response to vertical displacement of the selector which carries the latter.
3. Apparatus for use in the grading or selection of leather according to thickness as claimed in the preceding claim 2, in which a separate indicator strip is provided to co-operate with each horizontally spaced graduation of the indicator, and individual mechanical devices are associated with each indicator strip, such devices being conveniently arranged side-by-side above said actuatingelement of the selector so that any indicator strip may be operated by said actuating element only when the particular thickness for that strip passes beneath the feelers and according to the position of said actuating element at the moment of a vertical displacement of the selector.
4. Apparatus for use in the grading or selection of leather according to thickness as claimed in the preceding claim 2, in which a separate indicator strip is provided to co-operate with each horizontally spaced graduation of the indicator, and individual mechanical devices are associated with each indicator strip, such devices being conveniently arranged side-by-side above said actuating element of the selector so that any indicator strip may be operated by said actuating element only when the particular thickness for that strip passes beneath the feelers and according to the position of said actuating element at the moment of a vertical displacement of the selector; said mechanical means actuating individual indicator strips, comprising a series of spring pawl and rack devices associated with pivotal lever frame structures, whereby individual indicator strips may be longitudinally projected by step-motion to register with the readings of the indicator.
5. Apparatus for use in the grading or selection of leather according to thickness, as claimed in the preceding claim 2; in which said actuating element carried by the selector includes an arm attached at its lower end to a horizontal carrier having connection through springs with the top of the selector and also lateral springs connecting opposed sides of the arm with upper ends of rods which guide said carrier, for the purpose specified.
6. Apparatus for use in the grading or selection of leather according to thickness, as claimed in the preceding claim 2, in which the selector bars are adapted to be reciprocated in vertical planes by means of spaced pairs of discs carrying crank pin rollers.
7. Apparatus for use in the grading or selection of leather according to thickness, as claimed in the preceding claim 2, in which the selector bars are adapted to be reciprocated in vertical planes by means of spaced pairs of discs carrying crank pin rollers, respective pairs of said crank pin rollers being off-set, for the purpose specified.
8. Apparatus for use in the grading or selection of leather according to thickness, as claimed in the preceding claim 1, in which a counter is arranged to indicate the total number of stepmotions or registrations imparted to individual indicator strips by an operative connection therewith.
9. Apparatus for use in the grading or selection of leather according to thickness as claimed in the preceding claim 1, in which an additional indicator is provided adjacent the indicator strips in order to co-operate with the projecting portions thereof, for the purpose specified.
EVAN GEORGE WILSON.
US22945A 1934-06-02 1935-05-23 Apparatus for grading leather, etc. Expired - Lifetime US2146277A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2676412A (en) * 1950-12-05 1954-04-27 Swift & Co Thickness measuring apparatus for sheet material
US2820297A (en) * 1952-02-14 1958-01-21 Deering Milliken Res Trust Lap roll analyzer
US3034218A (en) * 1957-11-01 1962-05-15 Kaiser Aluminium Chem Corp Apparatus for continuous gauging

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2676412A (en) * 1950-12-05 1954-04-27 Swift & Co Thickness measuring apparatus for sheet material
US2820297A (en) * 1952-02-14 1958-01-21 Deering Milliken Res Trust Lap roll analyzer
US3034218A (en) * 1957-11-01 1962-05-15 Kaiser Aluminium Chem Corp Apparatus for continuous gauging

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