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Publication numberUS2522723 A
Publication typeGrant
Publication dateSep 19, 1950
Filing dateOct 13, 1948
Priority dateOct 13, 1948
Publication numberUS 2522723 A, US 2522723A, US-A-2522723, US2522723 A, US2522723A
InventorsStanley M Rookyard
Original AssigneeStanley M Rookyard
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Chromometer
US 2522723 A
Abstract  available in
Images(4)
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Claims  available in
Description  (OCR text may contain errors)

Sept-l9, 1950 i s. M.. ROOKYARD 2,522,723

' CI-IROMOMETER Filed Oct 15, 1948 v 4 Sheets-Sheet 1 I Irzzren 55- .5. fi fiv 1 @QMM Sept. 19, 1950 s. M. ROOKYARD T 2,522,723

CHROMOMETER Filed Oct. 15, 1948 4 Sheets-Shet a v Sept. 19, 1950 s, MRQQKYARD 2,522,723

CHROMOMETER Filed Oct. 13, 1948 4 Sheets-Sheet 4 Q I'I I 425 13% lnmnfar' 3 -11 CP WV' Stan l Mfaok z ard Patented Sept. 19, 1950 UNITED STATES PATENT OFFICE Introduction This invention relates to colour blending and matching apparatus, and more particularly to apparatus of this nature that includes indexing means whereby the value of each primary colour making up a complex colour is visually indicated on a quantitative scale.

The present development is primarily designed to facilitate the work of colour engravers, gravure and offset workers, in securing with the least possible efiort in a printed reproduction the exact density and shade of colour as required to match a part or whole of an original, but may also be used for other purposes which are analogous.

Reproductions of this nature are produced by a series of printing plates, letter press, planographic, intaglio, or otherwise prepared, to take the correct amount of ink of a basic colour, which when the plates are printed successively over the same area produces on the printed sheet the correct shade of compound colour required, Usually in work of this nature, three printing plates, each adapted to carry one of the primary co1ours are employed, and the preparation of these plates so that the correct amount of each colour will be carried and subsequently transferred from each plate in the printing is a job that involves considerable trial and error correction even when these operations are performed by a skilled craftsman.

The present invention aims to provide a colour selection and blending apparatus that not only provides a means whereby primary colours may be blended to match any desired compound colour or shade, but also provides indicating means whereby the value of each primary colour is given.

Applicants development The invention is embodied in an apparatus that comprises in combination, a housing on which there is mounted a control panel having a viewing window. A plurality of moveable elements are mounted within the housing, and each of the elements are divided into Sections representing a relative percentage of a particular colour superimposed on a transparent ground. The moveable elements are arranged within the housing so that one section of each element overlaps a section of each of the other elements in superimposed relationship in a field of view covered by the viewing window in the control panel. Separate element moving means are provided so that the in dividual sections of each element may be moved in selective register beneath the viewing window,

13 Claims. (01. 35- 285) Controlling means associated with the moving means are mounted on the control panel, and in combination with suitable indexin numerals on the control panel, are adapted to visually indicate the relative position of each section of each element in register with the viewing window. Means are also provided so that the selected group of element sections may be raised from the normal plane of travel to a position directly adjacent the viewing window. Locking means associated with the element lifting means are adapted to lock the moveable colour bearing elements in selected register so that the density value of each selected section of each of the elements, as may be selected to form a complex colour or shade, may be ascertained.

Preferred arrangement According to a more specific aspect of the invention the preferred apparatus includes a casing in which the apparatus is housed. A cover plate is fastened on the casing and forms a control panel on which a plurality of controlling knobs are mounted. An opening in the control panel is covered by a transparent disk to provide a viewin window and radially spaced apart numerals are inscribed on the panel about each of the control knobs. A plurality of moveable colour carrying elements comprising transparent disks are mounted for rotation on shafts within the casing and are rotated by means of the control knobs mounted on the control panel. These disks are marked off so as to each constitute a plurality of radially divided segments extending from the centre portion to adjacent the outer periphery of the disk. Each of the disks bears one of the primary colours, i. e. yellow, red, blue and black, and each segment is coloured to a graduate density percentage of the particular colour of the disk.

The disks are mounted within the casing so that a segment of each disk overlaps a segment of each of the other disks in a field of view covered by the viewing window in the control panel. This arrangement allows the disks to be rotated by the control knobs so that any segment of each disk can be placed in superimposed register with the viewin window in order that the primary colours carried by the disks may be blended to form any desired complex shade or colour.

The numerals on the control panel are positioned relative to the corresponding percentage of density on the segments of each individual disk actuated by each control knob, so that the position of the control knobs are thus adapted to indicate the percentage value of each of the primary colours used in making up a compound colour.

In order that the true value of each of the primary colours making up a compound colour may be more closely ascertained a lift piston or elevator is pivotally mounted within the casing and is adapted, when actuated by a control knob mounted on-the .controlpanel, to: raise the selected segments of the colour disks to a position directly adjacent the viewing window. Preferably the top of the lift piston carries a pad of sponge rubber or other resilient material so that the disk portions are slightly bowed in a convex manner and are thus squeezed into closer proximity withtheviewing window.

The shafts on which the colour disks are mounted are each geared to rotate an auxiliary shaft mounted adjacent thereto. These auxiliary shafts also carry an additional toothedgear and locking means connectedzto and actuated by the lift piston actuating mechanism is adapted to engage these gears and .lock the colour disks in their selected position. Preferably the locking means comprise rotatably mounted lever arms resiliently connected to and rotated by a lever arm forming part of the lift piston actuating mechanism. The lever .arms carry extended locking pins that are-adapted to engage the teeth of the gears carried by .the auxiliary shaft. In this arrangement, when the lift iston control knob .is actuated to raise any selected segments to the viewing window for inspection, the lever arms are simultaneously rotated and the locking pins thus lock-the toothed gears of the auxiliary shafts and the associated disk bearing geared shafts in the positions selected prior to the actuation of the lift piston. When it is desired to change :therelative positions of the colour disks for further blending, .the release of the lift piston alsoadisengages the locking pins and the disks are again free for rotation by their respective controlling knobs.

Alternative preferred arrangement An alternative construction :is also contemplated in which the colour bearing disks .are replaced by elongated bands of transparent film carrying the necessary primary colours. In this arrangement each of the bands is divided transversely into sections, each of the sections being coloured to have a density equal to a graduated percentage of the solid colour of the band similar to the arrangement on the disks.

Preferably the-bands. and the associated mechanism are housed in a casing similar to that used for housing the disks. The cover plate and controlling knobs are also substantially the :same, the indexing scales and viewing window being located in the same relative positions. The main differerence of the alternative arrangement is the colour bands themselves and the mechanism employed to move them into and out of register with the viewing window.

In this apparatus each of the .colour bands .is mounted .on and is moved between a pair of rollers, .one of the rollers being an actuated or winding roll and .the other being a resiliently controlled or rewinding roll. The winding rollers are each mounted on a horizontal shaft supported for rotation on brackets within the casing. Each of the horizontal shafts is geared to a Vertical shaft rotatably'mounted within and extending to a position outside of the casing. The vertical shafts are directly connected to and actuated by direction.

The winding and rewinding rolls are preferably arranged within the casing in pairs, the individual hands ofzeachipairlheing arranged so that they will travel in parallel planes one above the other.

The pairs of'bands are arranged within the casingso that one pair normally travels in a slightly higher horizontal plane than the other, and the lower pair of bands is adapted to move transversely across the apparatus with the upper pair crossing over the lower bands at right angles to their travel. It is also contemplated, in this respect, that these positions may be reversed and that the upper pair may be moved transversely across the apparatus with the lower pair crossing over.

This arrangement allows the colour bands to be moved in either direction, towards or away from the viewing window, with one section of each band meeting in-sup'erimposed relationship with a section of each of the other bands in the field of view covered by the viewing window, and as the knob indicate the relative position of each section of the colour bands in the same manner as the segmentsof the disks, the percentage of colour of each of the sections as may be placed in register to form a compound colour is thus visually indicated.

A lift piston similar to that employed inthe apparatus previously described is also included in this alternative arrangement, and is adapted to raise the selected sections of the colour bands to apos'ition directly adj acentxthe viewing window for inspection. Locking means associated with the lift piston actuating mechanism are also provided so that the colour bands may be locked into selectedxposition when the lift piston is actuated.

Detailed description Having thus :generally described the nature of the invention particular reference will be made to the accompanying drawings, and in which:

Figure 1 is a diagrammatic View in perspective of a preferred construction of an apparatus according 'to the invention.

Figure 2 is a plan view of the apparatus as shown in Figure 1 with a section of the top plate removed to show the arrangement of the colour disks.

:Figur'e v3 is a plan view of the colour disks as they are arranged within the casing.

Figure 4 'isa side elevation of the apparatus 'as shown in Figure '2 with the cover plate and casing shown in section.

Figure 5 is an enlarged detail view mostly in side elevation partly in section of a portion of the apparatus illustrating the disk locking mechanism.

Figure -'6Lis a diagrammatic view in plan elevation of the disk gearingand braking mechanism.

Figure "7 is an enlarged detail View partly in side elevation partly in section illustrating the construction of the lift mechanism.

Figure 8 is a diagrammatic plan view of an alternative form of mechanism as may be utilized:

Figure 9 is an enlarged side elevation partly in section of the apparatus illustrated in Figure 8 and also showing in section the relative positions,

of cover plate and easing.

Figure 10 is a sectional view of Figure 9- along the line |0-| 0 illustrating the connection of the brake rods to the lift piston.

Figure 11 is a fragmentary diagrammatic view of a portion of Figure 9 illustrating in more detail the gearing and locking mechanism of a windin roll.

With particular reference to the drawings the preferred arrangement illustrated includes a casing l0 in which the apparatus is housed. A cover plate l2 fits on the casing I0 and is removably secured thereto by suitable screws and washers l4. Included in this cover plate I2 is a viewing window l6 and Openings l8 and to accommodate the shafts of the manipulating control knobs 22 and a lift and brake control knob 24 respectively. Radially-disposed spaced-apart indicating numerals are inscribed on the cover plate l2 about each of the control knobs 22 and a graduated density scale 25 is also provided with indicating numerals corresponding to those surrounding the control knobs 22. The control knobs 22 are provided with pointers 23 which are adapted to line up with the indicating numerals on the cover plate l2 relative to the positions of the colour disks contained within the casing as will be described more fully later.

The viewing window |6 is covered by a transparent disk preferably of glass, which, while providing a solid face against which the disks are pressed for visual inspection, also protects the disks and inner mechanism from dust and dirt.

Preferably this disk I1 is mounted on the underside of the cover plate I2, as is shown in Figure 7, and is retained in place by a recessed flanged plate I9 secured to the cover plate |2. In the construction illustrated the opening 2| in the flanged plate I9 is smaller than the viewing window l6 and the annular portion of the plate l9 surrounding the opening 2| is painted white, or provided with an inner ring of white material.

This is to concentrate the View on the colours provided through the colour disks as seen in the opening 2| through the viewing window l6 and to make them stand out in order to facilitate the matching of an original colour.

The actuating and lifting mechanism of the apparatus is attached to and is removable with the cover plate l2. With particular reference to Figures 4 and 7 this mechanism is shown as being mounted between and supported by an upper supporting plate 26 and a lower supporting plate 28. These plates are spaced apart by spacersand bolts 30 and are suspended from the cover plate |2 by the screws 32 engaged in the upper sup porting plate 26.

The upper supporting plate 26 includes an opening 34 through which a lift piston or elevator 36 is adapted to pass and lift the selected segments of the colour disks to the opening 2| and the viewing window It as will be described more fully later. The lift piston 36 travels in a cylinder 38 which is mounted between the upper and lower supporting plates 26 and 28. The top of the piston 36 is preferably provided with a special head 31. This head is surfaced with sponge rubber or other resilient material in order to form a flexible bearing surface which is adapted to bear against the portion of the disks raised into viewing position so that they are squeezed so as to bow slightly into the aperture 2|. This is to eliminate possible undesirable effects, such as Newton rings. tending to impair the true value of the blended colour, as may be caused if the disks were squeezed directly against the glass. The main elements comprising the apparatus, namely; the colour disks, the means for rotating the disks, the lifting mechanism by which the disks are raised for visual inspection,

and the cooperating braking mechanism will now be described separately and in more detail.

The colour disks With particular reference to the apparatus shown in Figure 3, four colour disks are used and are indicated by the numerals 4|], 42, 44, and 46. Each of these disks include a round central portion that is blank and a plurality of radially divided segments extending from the central portion to adjacent the outer periphery of the disk.

The radially divided portion of each disk car ries one of the primary colours, i. e., yellow, red, blue and black and each segment a, b, c, etc.,.is coloured to a graduated density of the particular colour carried by the disk. Preferably one or more of the segments on each disk are left clear or transparent so that if in the blending of a compound colour, one of the primary colours is not required the disk bearing this colour is rotated till the blank or clear section is in register with the viewing window It. The densities of colour as represented by the segments of the disks are graduated to provide from 0% as represented by the clear portions to or solid colour. For example; In the present arrangement, the disk 46 is the black disk, and the segment a is clear or has a density of 0%. The next segment I) carries 10% density of black, the segment 0 20%, and on up to 100% which will. be segment 7c bearing a solid black colour. The other disks 40, 42 and 44 are graduated and coloured in a similar manner.

In the apparatus shown the three upper disks are all made of a transparent material, for example: a cellulose film, with the bottom disk of white paper with the colour preferably printed directly on its surface. Cellophane (regenerated cellulose film) is one suitable material for this purpose. It is also contemplated that other transparent materials, having similar characteristics, could be utilized, as for example, dye strip film positives. Each transparent disk is reinforced about the outer periphery by a metal band 5| so that they will not curl or otherwise deform in shape, and is mounted for rotation on one of four shafts 48, 5!], 52 and 54. This is done by means of a pair of disk mounting plates 53'. These are positioned one above and one below each disk and are pressed against the disk so that rotation of the mounting plates 53 will also rotate the disk sandwiched therebetween. Each of the mounting plates 53 include a centrally disposed opening 55 of a slightly smaller diameter than the shaft on which it is mounted so that a press fit is made securing the mounting plates in position on each shaft.

In the apparatus illustrated the bottom disk 40 is yellow, the disk 42 red, and disk M blue and the uppermost disk 46 carries segments of graduated densities of black to provide a grey scale.

rotation between the upper and lower supporting plates 26, 28 and the .ends of the shafts extend beyond the upper support '26 and through the cover plate I2 at which point the control knobs 22 are mounted and secured for the rotation of the disks.

The disposition of the shafts and disks as shown in Figure 3 is such that a segment of each disk is overlapped in sequence by a segment of each of the other disks. This overlapping is arranged to occur centrally relative to the casing I and the cover plate I2 so that the overlapping segments .are covered by and visible through the viewing opening IE.

Mounted on each of the shafts 48, 58, 52 and 54 adjacent the lower support plate is a toothed gear 58. These gears are in mesh with a second set of gears 64 which are mounted on auxiliary shafts 66, 68, "Ill and 12. The auxiliary shafts 66, 68, I0 and T2 are rotatably mounted between the upper 26 and lower 28 supporting plates as is shown in Figures 4 and 5. A third set of toothed gears I4 are mounted on the auxiliary shafts 56, 68, and I2 and are adapted to be engaged by a series of locking pins attached to braking lever arms.

Disk lifting and locking mechanism With particular reference to Figures 5, 6 and 7, a bracket 84 is mounted on the lower supporting plate 28. Pivotally mounted on this bracket 84 .is a lift lever arm '86. One end of the lever arm :86 extends through a. slot 88 in the cylinder 38 to contact the lift piston :36 and the other end is pivotally connected to a lift and braking control rod .90. The control rod 190 is slidably mounted in and extends beyond the upper supporting plate 26 to pass through the opening 20 in the :cover plate I2. The control knob .24 is mounted on the protruding .end of the rod -90 which also includes a notch 9.2 adapted to engage the edge of the coverplate I2 and thereby lock the rod 90 in position. Preferably a block 85 of sponge rubber or similar resilient material is positioned under the lift piston lever arm 86. This is to provide a cushioning effect for the movement of the lever arm and the associated raising or lowering of the lift piston. A pair of locking lever arms :80 and 82 are rotatably mounted -.on brackets 88 and 98 secured to the lower supporting plate 28. These lever arms 80, 82 are resiliently connected by spiral springs 86 to the lever arm -86 and are adapted to be -actuated by movement .of the control rod .90. vLocking pins I 00 and I02 extend from the lever arms 88, 82 and are preferably made of resilient spring steel to assure positive locking of both sets of gear trains and their associated .disks when the pins are simultaneously actuated by their respective common lever arms. If the pins were made of non-resilient metal and by chance were not aligned perfectly with the teeth of the gears when the locking mechanism is actuated, it would be possible for one of the locking pins to ride on top of the gear instead of engaging in the teeth and then the other locking pill carried on the same lever arm could not engage the other gear and no locking would take place of that particular gear and associated disk. 'It is contemplated however, that the locking pins .'I 00 and I02 could be positioned .at varying angles relative to the longitudinal axis-of the lever arms 8 I so that the gear :trains and associated disks 116-- mote from the control rod are locked po sition before the gear trains and associated disks near the control rod. This variance of engaging angle in the locking pins would ensure the engaging of the locking pins in the remote gears first and then by the torsion of the lever arms the near locking pins would engage and lock the near gears in position.

Alternative construction In the alternative construction shown in Figures 8, 9, l0 and. 11 the disks are replaced by bands of transparent film carrying the necessary primary colours. These bands are divided into sections, a, 1), etc, each of the sections treated to have a density equal to a graduated percentage of the solid colour in a manner similar to the arrangement on the disks. In the apparatus illustrated, the bands and related mechanism are housed in a casing similar to that as previously described housing for the disks. The cover plate and controlling knobs are also the same, the indexing scales and viewing window being located in the same relative positions. The main difference in this alternative arrangement is the colour bands themselves and the mechanism employed, to -move them into and out of register with the viewing window. In the apparatus illustrated in Figures 8 and 9, the lowest band IIB carries graduated sections of yellow. band I 16 red, band III blue, and the "upper band II-4 graduated sections forming a grey scale.

The bands are moved into and .out of register with the viewing window by a series of rollers actuated by the turning of the control knobs 22. The bands are arranged so as to have the one pair travelling transversely across the ap aratus and the other pair crossing over the first pair of bands at right angles to their travel. Each pair of bands are actuated in the following manner.

. A control knob I22 is attached to a shaft H8 which extends into the body of the apparatus and is mounted between the-cover plate H2 :and an upper supporting plate I26. A bevel gear I20 mounted on the lower end of each shaft H8 is in :mes'h with a bevel gear I23. The bevel gear I23 is mounted on a shaft I24 forming the axle for a winder roll I2'I so that rotation of the shaft I I8 in a counter-clockwise direction will cause the roll LIZ] to rotate and wind the band onto the roll. The band, for example H4, is previously wound on a second spring tensioned roll I28 connected to aspiral spring J32, and is passed across the apparatus onto the winding roll III. The second band aI I6 of the pair is also actuated in a similar :manner. The operation'of this band movin apparatus is .as follows: As the band H4 is previously wound on the spring tensioned roll I28 the :unwinding of the band coils the spring 132 and when the knob I22 and associated shaft and gearing is rotated in a clockwise-direction, this tension is sufficient to rewind the band ontothe roll I28 and cause the band to move in direction opposed to that as caused by the initial counter-clockwise move: ment. The shafts and associated gears are arranged to have .a certain amount -.of friction so as to tcountera-ct any uncontrolled movement of the bands asmay be caused by thetension of'the prin s.

A lift arrangement similar to that used with the disks is also employed in the present apparatus, the main difference being in *the loo-oper ating locking mechanism. This. locking mechanism comprises a toothed gear I3I secured to each .of the axles of the winding rolls I21. A braking pawl I34 is pivotally mounted in the supporting plate I26 adjacent each gear I3I and is actuated into contact with the gears MI by an extended portion of the pawl I34 resiliently and slidably connected to a lift piston I38 which is actuated by lever arm I86 in a cylinder I38 in the same manner as the lift piston mechanism of the rotatable disk apparatus.

The second pair of bands III] and III are moved and retained in selected position in the same manner as described for the first pair and the indexing numerals and colour scale are substantially the same as employed in the disk arrangement, with. the exception there is a stop at the 0% on each dial to prevent over or reverse winding of the bands.

The sub-titles used throughout the specification are merely to simplify reference thereto and should otherwise be disregarded.

1. A colour analyzing apparatus, comprising in combination, a housing, a control panel on the housing, a viewing window in the control panel, a plurality of moveable elements within the housing, each of said elements having a number of sections representing a relative percentag of density of a particular colour superimposed on a transparent ground, the respective elements being so arranged within the housing so that one section of each element overlaps a section of each of the other elements in superimposed relationship in a field of View covered by said viewing window, means for moving each of the elements individually so that any individual section of one element may be placed in selective register with any one section of each of the other elements beneath the viewing window, means for raising the selected group of sections from their normal plane of travel to a position directly against said viewing window including a lift piston beneath the superimposed sections and adapted to be moved into viewing position to press said sections together, viewfixing means above said control panel for moving said lift piston into viewing position and means operatively connecting said view-fixing means with said lift piston whereby said viewfixing means is effective to move the lift piston into or out of viewing position, and indexing means on said control panel associated with said element moving means whereby the density value of each selected section of said elements as arrelationship in a field of view covered by said viewingwindow, means for moving each of the elements individually so that any individual section of one element may be placed in selective register beneath said viewing window with any i of one section of each of the other elements,

10 means for raising the selected group of sections from their normal plane of travel to a position directly against said viewing window, elementcontrolling means associated with said lifting means and element-moving means whereby any selected group of element sections may be moved into and locked in position, and indexing means on said control panel associated with said element-controlling means whereby the density value of each selected section of each of said elements as arranged to form a complex colour or shade may be read.

3. A colour analyzing apparatus, comprising in combination a housing, a control panel on the housing, a viewing window in the control panel, a plurality of transparent disks mounted for rotation on individual shafts within the housing, each of said disks having a number of radially divided segments representing a relative percentage of a particular colour superimposed on a transparent ground, the respective disks being centrally mounted on individually spaced apart shafts so arranged within the housing so that one segment of each disk overlaps a segment of each of the other disks in superimposed relationship in a field of view covered by said viewing window, means for rotating each of the shafts individually so that any individual segment of each disk may be placed in register with any one segment of each of the other disks beneath the viewing window, and individual indexing means for each disk on the control panel associated with said disk moving means whereby the density value of each selected segment of each of said disks as arranged to form a complex colour or shade may be read.

4. A colour analyzing apparatus, comprising in combination a housing, a control panel. on the housing, a Viewing window in the control panel, a plurality of transparent disks mounted for rotation on individual shafts within the housing, each of said disks having a number of radially divided segments representing a relative percentage of a particular colour superimposed on a 4 transparent ground, the respective disks being centrally mounted on individually spaced apart shafts so arranged within the housing so that one segment of each disk overlaps a segment of each of the other disks in superimposed relationship in a field of view covered by said viewing window, means for rotating each of the shafts individually so that any individual segment of each disk may be placed in register with any one segment of each of the other disks beneath the viewing window, means for raising a selected group of segments from their normal plane of travel to a position directly adjacent said viewin window, and individual indexing means for each disk on the control panel associated with said disk moving means whereby the density value of each selected segment of each of said disks as arranged to form a complex colour or shade may be read.

5. A colour analyzing apparatus, comprising in combination a housing, a control panel on the housing, a viewing window in the control panel, a plurality of transparent disks mounted for rotation on individual shafts-within the housing,

each of said disks having a number of radially divided segments representing a relative percentage of a particular colour superimposed on a transparent ground, the respective disks being so arranged within the housing so that one segment of each disk overlaps a segment of each of the other disks in superimposed relationship in a field of view covered by said viewing window,

means for moving each of the disks, individually so: that any individual segment of each diskm'ay be placed in register with any one section of each of the other disks beneath the viewing, window, means for raising a selected. group of segments from their normal plane of travel to a position directly adjacent said viewing window, controlling means associated with said disk lifting means whereby any selected group of segments may be moved into and locked in selected position, and indexing means on the control panel associated with said disk movingv means whereby the density value of each selected segment of each of said disks as arranged to form a complex colour or shade may be read.

6. A colour analyzing apparatus, as claimed in claim 5, in which the means for raising. the selected group of segments from their normal plane of travel to a position directly adjacent theviewing window comprises, a lift piston slidably mounted in a cylinder within the housing, a pivotally mounted lever arm' withinv said. housing adapted to actuate said piston, a control rod pivotally connected to said lever arm, andv controlling means on said control panel connected to said control rod whereby said piston is raised or lowered as required.

7. A colour analyzing apparatus as. claimed in claim 6, in which the controlling means associated with the lift piston comprises a. pair of rotatably mounted lever arms mounted on brackets within.

said casing and being resiliently connected to said lift piston control rod, a plurality of aux-' iliary shafts rotatably mounted in said casing, a first toothed gear mounted on each of said disk supporting shafts, a second toothed gear mounted on each of said auxiliary shafts in meshed. contact with said first toothed gear, whereby actuation of said lift control rod to raise said lift piston also rotates said lever arms into. engagement with said second toothed gear to lock. said gears and associated shafts and disks in selected position.

8. A colour analyzing apparatus, comprising in combination, a housing, a control panel on the housing, a viewing window in the control panel, a plurality of flexible transparent bands mounted for movement within the housing, each of said bands having a number of transverse sections representing a relative percentage of a particular colour superimposed on a transparent ground, the bands being so arranged within the housing so that a section of each band overlaps a. section of each of the other bands in superimposed relationship in a field of view covered by said. viewing window, means for moving each of the bands. individually so that any individual section of each band can be placed in register with any one section of each of the other bands beneath the viewing window, means for raising aselected group of sections from their normal plane of travel to a position directly adjacent said viewing window element-controlling means associated with said lifting means and element-moving means whereby any selected group of element sections can be moved into and locked in position, and indexing means on said control panel as-- sociated with said band moving means whereby the density value of each selected section of each of said bands as arranged to form. a complex colour or shade may be read.

9. A colour'analyzing apparatus, comprising in combination, a housing, a control panel on the housing, a viewing window in the control panel, a plurality of flexible transparent bands mounted for movement within the housing, each of said bands having a number of transverse sections representing a relative percentage of a particular colour superimposed on a transparent ground, the bands being so arranged within the housing so that a section of each band overlaps a section of each of the other bands in superimposed relationship in a field of view covered by said viewing window, means for moving each of the bands individually so that any individual section of each band can be placed in register with any one section of each of the other bands beneath the viewing window, means for raising a selected group of sections from their normal plane of travel to a position directly adjacent said viewing window, controlling means associated with said band lifting means whereby any selected group of sections may be moved into and locked in selected position, and indexing means on said control panel associated with said band moving means whereby the density value of each selected section of each of said bands as arranged to form a complex colour or shade may be read.

10. A colour analyzing apparatus, as claimed in claim 9, in which. the means for raising the selected group of sections from their normal plane of travel to a position directly beneath the viewing window comprises, a lift piston slidably mounted in a cylinder within the housing, a pivotally mounted lever arm within said housing adapted to actuate said piston, a control rod pivotally connected to said lever arm, and controlling means on said control panel connected to said control rod whereby said piston may be raised or lowered as required.

11. A colour analyzing apparatus as claimed in claim 10, in which each of the colour bands is mounted on and is. moved between a pair of rollers, one of said rollers constituting a winding roll and the other constituting a resiliently controlled re-winding roll, each of said winding rolls being mounted on a horizontal shaft supported for rotation on brackets within the casing, a first gear on each of said horizontal shafts, a vertical shaft rotatably mounted in said casing adjacent each of said horizontal shafts, a second bevel gear on each of said vertical shafts in meshed engagement with said first bevel gear, a control knob mounted on each vertical shaft outside of said casing, whereby rotation of said. control knob in one direction actuates said first and second bevel gears and associated shafts to rotate said winding roll in one direction, and

movement of said control knob in the other direction allows said resiliently controlled re winding roll through said colour band to rotate said winding roll in the opposite. direction. I

12. A colour analyzing apparatus as claimed in claim 11, in which the. controlling apparatus associated with the lift piston comprises, a plurality of pivotally mounted lever arms, each of said arms having a. resilient and slidable connection with said lift piston, and a toothed gear mounted on each of said horizontal shafts supporting the winding rolls of the band moving arrangement, whereby movement of the lift piston actuates each Of the lever arms into engagement with each of the toothed gears and so locks' 7 claim 1, wherein said means operatively connecting the view-fixing means with the lift piston is a pivotally mounted lever in operative: engage 2,522,723 p 13 14 v ment with said lift piston, means normally re- REFERENCES CITED taining said lever in non-viewing position to clear said piston from said elements so that they can be freely moved, and the view-fixing means in- The following references are of record in the file of this patent:

eluding a control rod connected to the other end UNITED STATES PATENTS of said lever having a knob above the panel and 0 Number Name Date detent means on said control lever for retaining 1,581,374 Young Apr. 20, 1926 it in operative position. 2,120,499 Mackay June 14, 1938 2,196,271 Olson Apr 9, 1940 STANLEY M. ROOKYARD. 10 2,253,107 Brooks Aug. 19, 1941

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1581374 *Mar 2, 1925Apr 20, 1926Chester YoungsOil register for internal-combustion engines
US2120499 *Mar 25, 1935Jun 14, 1938Mackay RobertDevice for measuring color and light densities
US2196271 *Feb 25, 1938Apr 9, 1940Olson Hilmer CComposite color scale
US2253107 *Jul 31, 1939Aug 19, 1941Woolson Brooks JohnColor index device
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2641853 *Jul 16, 1949Jun 16, 1953Herbert W HeldingColor analyzing and synthesizing device
US2891323 *Jul 13, 1955Jun 23, 1959Arthur EcksteinApparatus for the control and analysis of color printing
US3088226 *Apr 10, 1962May 7, 1963Gail E BrinkworthColor compositor
US3596390 *Nov 5, 1968Aug 3, 1971Clinique Lab IncManually operable computer
US3597094 *Aug 11, 1967Aug 3, 1971David G GoldwasserPortable color identification device
US4310314 *Jun 23, 1980Jan 12, 1982Applied Color Systems, Inc.Reflected color simulator
US4801267 *Oct 16, 1986Jan 31, 1989Hans Von LoeschDisplay device for illustrating color mixtures
US5012431 *Feb 2, 1990Apr 30, 1991Colwell/General, Inc.Objective color notation system
DE3537990A1 *Oct 25, 1985Jul 9, 1987Hans Von LoeschAnzeigegeraet
EP0155910A2 *Feb 27, 1985Sep 25, 1985Asaver Handels- Und FinanzanstaltMethod and device for displaying, numerically coding and visualizing colours by trichromatic subtractive synthesis
EP0155910A3 *Feb 27, 1985Jul 2, 1986Asaver Handels- Und FinanzanstaltMethod and device for displaying, numerically coding and visualizing colours by trichromatic subtractive synthesis
EP0223910A1 *Jul 3, 1986Jun 3, 1987von Loesch, HansDisplay device for the representation of colour mixtures
WO1985004010A1 *Feb 27, 1985Sep 12, 1985Asaver Handels-Und Finanz-AnstaltMethod and device for displaying and digitally coding and visualizing colours by subtractive trichromatic synthesis
WO1987002767A1 *Oct 16, 1986May 7, 1987Loesch Hans VonIndicator of colour mixes
Classifications
U.S. Classification434/102
International ClassificationB44D3/00, G01J3/46
Cooperative ClassificationB44D3/003, G01J3/463, G01J3/46
European ClassificationG01J3/46D, G01J3/46, B44D3/00B