US2690018A - Split pattern registration checking device - Google Patents

Description

P 23, 1954 O.'FORTSCHNEIDER SPLIT PATTERN REGISTRATION CHECKING DEVICE 4 Sheets-Sheet 1 Filed May 25, 1953 n I l MMMS P 1954 r o. FORTSCHNEIDER 2,690,018

SPLIT PATTERN REGISTRATION CHECKING DEVICE Filed May 25, 1953 4 Sheets-Sheet 2 9 I057 [04 ll 90 ll v INVENTOR Ollz'eflrzscfineir Maw ATTORNEYS Sept. 28, 1954 o. FORTSCHNEIDER SPLIT PATTERN REGISTRATION CHECKING DEVICE 4 Sheets-Sheei: 3

Filed May 25, 1953 r e M N9 Q! QQ n 1 E :3 m w a E w E E v v2 v8 22 F i v2 mu o2 0 i .5 .w b\.\ w

ATTORNEYS P 28, 1954 1 o. FORTSCHNEIDER 2,690,018

SPLIT PATTERN REGISTRATION CHECKING DEVICE Filed llay 25, 1953 4 Sheets-Sheet 4 INVENTOR ATTORNEYS Patented Sept. 28, 195 4 UNITED STATES PATENT OFF ICE 2,690,018 SPLIT PATTERN REGISTRATION CHECKING DEVICE Ollie Fortsohneider, Decatur, I'll. AppIication'May 25, 1953, serial No. 351,164

10 Claims. 1

This invention pertains to foundry patterns, and more particularly to a device for checking the alignment or registration of pattern halvesor segments on a split or matched plate pattern. Such patterns are used to form registering mold cavities in the cope and drag sections of a meld flask.

The use of matched plate patterns is old the art and comprises a pattern plate having a pair of" segments or halves of one 'or more patterns positioned in registration on opposite sides of such plate. In some instances each pair'of pattern segments is formed integrally with the plate, and in other instances the segments of each pair are fastened in registering relationship on opposite sides of the pattern plate. "The pattern segments on one side of the pattern plate must register exactly, or within predetermined limitsg with their corresponding segments on the opposite side of the plate. Lacking such registration, the verticaledges of the mold cavities in the cope and drag sections of the flask will not align accurately and result in defective castings.

Devices for checking the registration of the pattern segments or halves of a split pattern or a matched plate pattern are known in the art. Known devices of this nature, however, can check only those edges of the pattern segments which can be reached, or are accessible, from an edge of the pattern plate; i. e., by these devices a check of the registration of the pattern segments can be made only by measuring from an edge of the pattern plate to those edgesof the pattern segments facing such plate edge; Matched plate patterns, however, frequently com-prise numerous pairs of pattern segments,

the registering edges of some of which are not accessible of measurement from any edge of the pattern plate. Further, it has been found in actual practice that it takes about three hours to check the registration of the pattern segments of a split pattern by known devices.

Accordingly, it is an object of this invention to provide a device forc-he'c'king the registration or alignment of the pattern segments or halves sideration which will enable 'a' registration check to be made of pattern segments which are not accessible of direct measurement from an edge of the pattern plate. 7 I

It is-another object of this invention tdp'ro' 2 vice a registration checking device of the type under consideration "in which any edges of any pair of pattern "segments may be checked for proper alignment.

It is a further object of this invention to provide a device of the type under consideration which is relatively simple in construction, with resulting manufacturing economies, and easy to operate; 7

Other objects and advantages of the invention will be apparent from the accompa ying des'eript ien and renewin drawings, in which:

Figure 1 isa front elevational view of a regis tration checking device embodying this invention and showing a matched plate pattern secured to the device position-for checking the registration of its pairs of pattern segments.

Figure 2 is an enlarged fragmentary end elea vational View of the device shown in Figure l with the matched plate pattern removed there from.

Figures is a'plan view of the device shown in Figure 1, but with the registration checking means being moved to check the alignment of registering pattern segments adjacent an end of the pattern plate.

Figure t is an enlarged view, partly in ver'- tical section, taken substantially on line i -4 of Figure 1. p

Figure 5 is an enlarged fragmentary detailed view corresponding to Fig. 4, but showing the 015+ erative position of the registration checking fing-ers.

Figure 6 is an enlarged longitudinal sectional view of the indicating finger shown Figure 5.

Figure 7 is afragmentary plan view of the base of the indicating finger and illustrating the measuring gauge mounted thereon.

Figure 8 is a fragmentary side e'l-evationallview of the base of the indicating finger taken from the side opposite that shown in Figure 6.

Referring to the drawings, there is shown Figures '1, 2f, ar-iesdevice embodying this invention for checki g the registration of pairs or patternsegments" positioned on opposite sides of the plateof a split pattern. The device may be mounted on an appropriate supDOrt, such as a table or bench l 0 having pedestals 2 at the opposite ends thereof. elongated slide base or bed l4, preferably of relatively massive metal construction in order to achieverigidity, is -mount-' ed on the table pedestals t2 by means of feet 16 secured, as by' screws" IE, to the undersides of the slide base at its opposite ends and securely fastened, asby screws 2-0, to the pedestals. It'w'ill be seen that the slide base l4 bridges the pedestals I2 with considerable clearance space between the underside of the slide base and the top of the table 10.

Two spaced parallel grooves 22 (Figures 2, 3, and 4) in the upper surface of the slide base l4 extend substantially the length thereof and provide a relatively wide land 24 therebetween. Along the bottom of each groove 22 and adjacent its end portions, the slide base i4 is provided with a series of longitudinally-spaced interiorlythreaded apertures 26. Two generally L-shaped pattern plate supporting blocks 28 having reinforcing end webs 30 are adapted to be secured in adjustably-spaced relation on top of the slide base M by screws 32 which extend through the foot portions 34 of the blocks and are threaded into the apertures 26 in the slide base. The blocks 28 have depending tongues 35 to fit the grooves 22. Both of the supporting blocks 28 are secured in alignment with one of the grooves 22 in the slide base 14, as shown in Figures 2 and 3, and it will be seen that a considerable distance exists between the vertical plane faces 38 of the upright legs 50 of the blocks and the other groove 22, so that a split pattern 42 may be disposed vertically against the vertical faces of the supporting blocks with the lower edge of the pattern plate 54 resting on the land 24 between the two grooves.

A clamping block at secures the edges of the pattern plate 54 to the supporting blocks 28 by means of screws 48 which have large knurled heads 58 and extend through the clamping blocks and are threaded into the corresponding supporting blocks. Preferably, each supporting block 28 has a vertical flange 52 of approximately the same thickness as a pattern plate and against which one edge of the corresponding clamping block 16 is engaged. Also, each clamping block ie is provided with a pair of locator pins 54 which project inwardly toward the plane face 38 of the corresponding supporting block 28 between its vertical flange 52 and the clamping screw 48. The upper edge of the clamping blocks #6 may be slightly bevelled, as at 56, opposite the vertical faces 33 of the supporting blocks 28 to facilitate the insertion of a pattern plate into clamping position.

It will thus be seen that a pattern plate to be checked for registration of its pattern se ments is supported in vertical position so that it will not bend under its own weight during the checking operation and thereby possibly result in inaccurate readings. It further will be seen that because of the variable spacing between the supporting blocks 28, the device is adapted to support pattern plates of various sizes. It is also evident that the two grooves 22 provide for reversal of the blocks 28, so that a pattern plate can be clamped in position from either side of the table Ill.

The slide base Ill is provided with longitudinally-extending lateral flanges 58 having bevelled upper edges (Figures 2 and l). The horizontal undersurfaces of these flanges t and also their bevelled edges define parallel rails or trackways, a horizontal pair Bil and an inclined pair 62. A generally U-shaped relatively massive and rigid carriage 64 is positioned beneath the slide base l4 and has upright side arms 65 provided with outwardly divergent or inclined upper edge portions 68. Bolts '1!) extend through these upper edge portions 68 at the four corners of the carriage 64 and have rollers '22 secured thereon for travel on the inclined rails 62. At a lower location and somewhat inwardly from the carriage ends, four bolts M extend through the upright portions of the side arms 656 of the carriage 54 and have rollers 16 secured thereon for engagement with the horizontal rails 6t. Thus, the carriage 64 is mounted for travel longitudinally along the slide base l4, but is rigidly secured against lateral or vertical movement relative thereto. Preferably, all of the rollers 12 and 16 are provided with anti-friction bearings (not shown) for free and easy movement of the carriage on the base l4.

Depending from the carriage Ed on its opposite sides are two transversely-aligned bearings '38 in which a transverse shaft Bil is journalled by bushings 32. The opposite ends of the shaft til project outwardly beyond the carriage M and have a pair of parallel relatively massive rigid arms 8t and 8t rigidly secured thereto over the bushings 82 by pins 88 which extend through the arms B l and 86, the bushings B2, and the shaft 80. If desired, the carriage 34 may be formed in two lateral parts, which are secured together by means of the shaft 80, as shown in Figure l of the drawings.

The arms 84 and B6 are of a length to extend to the upper edge of the highest pattern segment on a matched plate pattern to be checked by the device. On their free ends, the arms 85 and $6 are provided with clamp-type split journal bearings at having clamping screws 92 extending through ears 94 adjacent the edges of the splits in the bearings. Mounted in the bearing 9% on the arm 84 is a cylindrical reference finger 96 having a knurled outer end 98 (Figure 3) and an inner end which tapers to a cylindrical tip portion mo. The screws 92 of the split journal bearing ti? on the arm 61'; are adjusted so that the reference finger 96 may be moved axially, but without radial play, to and from the split pattern being checked. Hence, by a combination of translational movements of the carriage G4, pivotal movements of the arm 84, and axial movements of the reference finger 36, its cylindrical tip portion Hill may be brought to bear against any edge of a pattern segment, Thus, even pattern segments having complicated edge configurations, such as the valve housing pattern halves IBE, may be checked by the device.

Mounted for axial and rotational movements in the bearing on the arm 86 is a cylindrical indicating finger HM which tapers to a cylindrical tip portion I05 of smaller diameter than the tip portion we of the reference finger 96. An enlarged circular knurled handle Hi3 (Figure 6) is secured on the other end of the indicating finger lil l, as by a set screw lli). Both arms 84 and 86 are identical in construction and secured to the transverse shaft 80 so that their split bearings 9B are in alignment. Hence, the reference finger Q5 and the indicating finger I04 are maintained in rigid alignment on opposite sides of a split pattern to be checked. It also will be seen that when the tip portion I00 of the reference finger $6 is brought into engagement with an edge of a pattern segment on one side of the plate (14, the tip portion lilfi of the indicating finger [04 may be brought into close adjacency with the corresponding edge of the registering pattern segment on the opposite side of the plate M.

The indicating finger I04 is provided with a relatively-deep longitudinal groove or slot H2 (Figure 6) extending from the tip portion I06 almost to the handle I08. A relatively short feeler lever I I4 is mounted in the groove =II'2 adjacent the tip portion I06 of the indicating finger I04 by .a pivot pm I I6 extending transversely through theside walls of the groove. The lever H4 isspaced from the bottom of the groove 2 so that slight rocking movements can be imparted to the lever. The outer end of the lever H4 is substantially flush-with the end of the tip portion I06 and has a feeler II-8 thereon which projects radially out of the slot -I I2 and beyond the peripheral outline of the tip portion I of the reference finger 96. The outer end of the feeler II8 is provided with a contacting surface I adapted to engage against an edge of a pattern segment to be checked.

At its opposite end the feeler lever -'I-"I4 is provided witha longitudinal slot or notch I22 having a rounded inner end within which fits a corresponclingly-rounded ball-like end I2=4 of an indicating lever I26 which is mounted intermediate itsends on a pivot pin I28; extending transversely through the side walls of the slot -'I I2. Thus, movements of the feeler II8 radially of the indicating finger I04 serve to rock the feeler lever H6 and, because of the ball-and-socketconnection between the feeler lever and indicating lever 126, simultaneously rock the indicating lever.

The indicating finger I04 is provided with an aperture I'3i'I which extends through the bottom of the slot I I2 adjacent the other end I32 of the indicating lever I26. A conventional micrometer gauge 134 has a spring-pressed operating stem or pin -I'-36 projecting through the aperture I30 and into engagement with the end I32 of the indicating lever I26, so that radial movements of the feeler II8 effect reciprocation of the gauge stem. The gauge I34 has a cylindrical casing I38 which is secured by a generally L-shaped bracket I40 (Figure 8) to the side of the indicating finger I04. Preferably, the bracket I40 has a pair of spaced elongated slots or apertures I42 through which fastening screws I44 project to adjustably secure the gauge I34 on thefinger I04. It will'be seen that by reason of this mounting the gauge I34 may be raised or lowered with respect to the finger I04 for calibration purposes. The gauge I34 also includes arotatablepointer I46 (Figure 7) travelling over a dial I48, preferably graduated in thousandths of an inch, which is mounted in a cylindrical sleeve I50 that is rotatable with respect to the gauge casing I38.

A generally U-shaped bracket I52 has itsbase secured; as by screws I54, to the handle I08 of the indicating finger I04, and two screws 1 56 are threaded in opposition through the legs of the bracket I52 into close proximity of each other. A bracket 1:58 is secured .to the sleeve I50 of the gauge 1.34 and has an arm I60 extending radially therefrom into a position between the ends of the-screws I56 on the bracket I52, so that by suitable adjustment of the screws I56, the sleeve I50, and consequently the gauge dial I48, may berotated relative to the pointer I46.

In operation efthe device, the gauge I 34' is first calibrated to read zero when a pair of pattern segments on opposite sides of a pattern plate are in perfect registration. This operation may b simply performed by placing a flat block (not shown) having a perfectly plane surface on the land 24 of the slide bed I4 beyond the plate clamps, or between such clamps with the split pattern removed. The reference finger 96 and its arm 84 are then manipulated so that the cy lin drical tip-portion -I-1l0-of the reference finger rests on top lof the flat surface of the block. The indicating finger -*I 04 is then moved axially =to-. ward the reference finger 96 until the the portion I06 of the indicating finger =I04 is above thesame surface of the block. The indicating finger 404 is then rotated by its "handle 108 'until the feeler IIB contacts the surface of the block and in a position substantially normal thereto. The gauge I34 is then calibrated to read zero by an appropriate rough adjustment of the gauge casing I38 with respect to the indicating finger I04 by means of the screws I44 and by -a final Vernier adjustment of the dial -I48 by means of the screws I56 which engage the radial arm I60 on the rotatable sleeve I50 of the gauge.

With the gauge I34 so calibrated, the device is ready for operation and, upon clamping a split pattern in place on the slide bed I4, the arms 84 and 86 and the reference finger 96 are so manipulated that the cylindrical tip I00 of the reference finger engages against an edge of a pattern segment to be checked for alignment with its corresponding segment on the opposite side of the pattern plate. The indicating finger I04 is then moved axially until its cylindrical tip H36 substantially touches the pattern plate. In this positiont-he tip 166 will be closelyadjacent the edge of the corresponding segment. The indicating finger I04 is then rotated 'byits handle 1:08 until the feeler I I8 engages an edge of the corresponding segment and is in a position substantially normally to thesurface of such edge. The gauge I34 is then read.

It will be seen that when the tip lite of the reference finger 96 and the feeler "I I8 of the indicatingfinger 10:4 engage edge surfaces of corresponding pattern segments that are in exact registration or alignment, there will be no radial displacement of the contact edge or surface "I20 of the feeler with respect to the peripheral out-- line of the cylindrical tip 10!} of the reference finger, and the gauge I34 will read zero. In the event, however, that the edge of the pattern segment engaged by the feeler H8 is offset ou'twardly or inwardly from the peripheral outline of the cylindrical tip I00 of the reference finger 96, and consequently from the edge of the segment engaged by the reference finger, the gauge I34 will not read zero but the pointer I46 will indicate a plus or minus reading depending upon the direction of offset of the two corresponding pattern segments.

Numerous checks or readings are then made of each pair of corresponding pattern segments on the split pattern, and, in the event that the corresponding segments of any pair are offset by more than a predetermined distance, usually a few thousandths of an inch, the pattern is usually discarded or possibly sent back to the pattern maker for reworking.

By reason of thealmost universal movability of the fingers 96 and I04 in directions parallel and normal to a split pattern, it-will be seen that even patterns having extremely irregular edge con-- figurations may be checked with theutmost case. It further will be seen that the invention provides a pattern registration checking device which is extremely accurate because of the mas sive and rigid construction of its parts, and yet which may be operated with extreme rapidity and facility. It further is pointed out that the device may be calibrated quickly and accurately.

It will thus be seen that the objects of this invention have been fully and effectively accomplished. It will be realized, however, that the specific embodiment disclosed for the purpose of illustratin the principles of the invention is subject to change without departing from such principles. Therefore, this invention includes all modifications encompassed within the spirit and scope of the following claims.

I claim:

1. Apparatus for checking the registration of a pair of pattern segments on opposite sides of a pattern plate comprising: a reference finger and an indicating finger; means for carrying said fingers in rigid alignment on opposite sides of a pattern plate and normal thereto; means for mounting said carrying means and the plate for relative movement between said fingers and the plate in any direction parallel to the plate; a tip on the end of said reference finger laterally engageable with a pattern segment on one side of the plate; feeler means mounted for lateral move-- ment on the end of said indicating finger and engageable with the other pattern segment on the other side of the plate; and means for measuring the displacement of feeler means relative to the point of engagement of said reference finger with the pattern segment on the said one side of the plate.

2. Apparatus for checking the registration of a pair of pattern segments on opposite sides of a pattern plate comprising: a reference finger and an indicating finger; means for carrying said fingers in rigid axial alignment on opposite sides of a pattern plate and normal thereto; means for mounting said carrying means and the plate for relative movement between said fingers and the plate in any direction parallel to the plate; a circular tip on the end of said reference finger engageablewith an edge of a pattern segment on one side of the plate; a feeler mounted for radial movement on the end of said indicating finger and engageable with a corresponding edge of the other pattern segment on the other side of the plate; and means for measuring the radial displacement of said feeler relative to the peripheral outline of said circular tip.

3. The structure defined in claim 2 wherein the indicating finger is mounted on the carrying means for rotation about the axis of said finger.

4. The structure defined in claim 2 wherein both fingers are mounted on the carrying means for movement normal to the plate.

5. The structure defined in claim 2 in which the measuring means includes: lever means within the indicating finger connected to the feeler for movement thereby; and gauge means mounted on said indicating finger for measuring movements of said lever means.

6. The structure defined in claim 5 including means for calibrating said gauge means to a zero indication when the ieeler is aligned with the peripheral outline of the circular tip.

7. Apparatus for checking the registration of a pair of pattern segments on opposite sides of a pattern plate comprising: means for fixedly supporting a pattern plate; a pair of rigidly connected spaced parallel arms adapted to be positioned on opposite sides of the plate; means mounting said arms for pivotal and translational movements in directions parallel to the plate; a reference finger and indicating finger carried in rigid axial alignment by said arms on opposite sides of the plate; a circular tip on the end of said reference finger engageable with an edge of a pattern segment on one side of the plate; a radial feeler mounted for radial movement on the end of said indicating finger, said feeler normally projecting beyond the peripheral outline of said circular tip and engageable with a corresponding edge of the other pattern segment on the other side of the plate; and means for measuring the radial displacement of said feeler relative to the peripheral outline of said circular tip.

8. The structure defined in claim 7 in which the plate supporting means includes horizontally spaced clamps for engaging opposite edge portions of the plate and supporting the latter in a vertical position, and the arm mounting means includes horizontal rails extending parallel to the plate on opposite sides and adjacent the lower edge thereof and a carriage running on said rails and mounting said arms for pivotal movement about a horizontal axis transverse to said rails and below the lower edge of the plate.

9. Apparatus for checking the registration of a pair of pattern segments on opposite sides of a pattern plate comprising: means for fixedly supporting a pattern plate; a reference finger and an indicating finger; means carrying said fingers in rigid axial alignment on opposite sides of the plate and for movement in directions parallel to the plate, each of said fingers being movable normal to the plate and said indicating finger being rotatable about its axis; a circular tip on the end of said reference finger engageable with an edge of a pattern segment on one side of the plate; a circular tip of smaller diameter than said reference finger tip on the end of said indicating finger, means defining a longitudinal slot in said indicating finger tip; a feeler lever mounted in said slot for pivotal movement about an axis transverse to said slot; a feeier on the end of said lever projecting out of said slot for engagement with a corresponding edge of the other pattern segment on the other side of the plate; lever means mounted within said indicating finger and connected to said feeler lever for movement thereby; and gauge means mounted on the base of said indicating finger and engaged with said lever means for indicating radial displacement of said feeler relative to the peripheral outline of said reference finger tip.

10. The structure defined in claim 9 in which the gauge means includes a casing, an axially movable pin projecting from the casing, and spring means urging said pin into engagement with the lever means.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,702,362 Osiek Feb. 19, 1929 2,136,134 Holley Nov. 8, 1938 2,397,108 Hanna Mar. 26, 1946 2,640,272 Bean June 2, 1953 FOREIGN PATENTS Number Country Date 656,799 Great Britain Sept. 5, 1951

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