Патент USA US2411776код для вставки
Nov. 26, 1946. c. H.l COLE ~ 2,411,776 _DRILL JIG Filed June 28, 1944 @g5 ' W/lW//AW/Amm INVENTOR. www( AT_TURNEYS Patented Nov. 26, 1946 U N IT ED " 'STATES 'PAT ENT . OFFICE ` ' 2,411,776 ` DRILL JIG Charles H. Cole, Leoni‘a,.N.'J. ApplicationJ une 28, 1944,. Serîal.No..542,486 .6 Claims. 2 1 shop use (drill centering, etc.) is contemplated. lThe'holes l-3I in row A arespaced .1250” on centers, this ro-w extending parallel to the long side ofthe plate. Row B starts _with a hole B-I, This'i‘nvention relates to a drill jig or‘ template, and particularly' to such a device which isv adapted to facilitate the quick and accurate measurement 'of distances, as between centers of' holes to be ‘drilled in a Work piece. which is '..125‘0” from hole A-l in a direction .parallelto the short end ofthe plate, and con ' An object ofthe invention is to provide a device which can be used, without adjustment of any moving part,v to measure a wide variety of dis tances in small steps betweena minimum and a tinues .with holes spacedincreasing distances vfrom-.the- correspondingly numbered holesl in row Auntil hole B-3l isl reached Aat a distance of 10 .5938” from=hole A--3l. Rows C` and D lie par _ allel to row B, row 4C being .4844” from row Bl Another object is to provide such a device which and row D being thesame rdistance beyond row C, is simple and inexpensive tomanufacture and is .measured horizontally. Row E is correspond durable, accurate and easy to use. VVingly ¿disposed but .comprises onlytwelve. holes. A further object is to' provide certain improve ments in the form, construction and arrangement 15 ,From-fthe foregoing it will be seen that distances in multi-ples of..1250" vcan bemeasured by the use of the> device whereby the above-named and other of row A alone,Í from .1250” upto 3.7500". Dis objects may effectively be attained. tances from the same. minimum up to 1.7500" in A practical embodiment of the invention is maximum. stepsof .0156”-j- can be measured by taking holes shown in the accompanying drawing, in which ' 20 4in Vrovi/2A and'` like numbered'holes in` rows B, C, Fig. l represents a top plan view ofthe jig; Fig. 2 represents a side elevation of the jig; and _D‘ or E; while longerdistances up Yto 4.0808” ll-A3 i) canbe ’measured along diagonals.V y Fig. 3 represents a transverse section taken along the line III-III of Fig. 1. Referring'to the drawing, the jig shovvn'there-~ ' ' It is further provided that additional holes> Such .as those marked F andV G- maybe drilled .inthe 'in comprises'a fiat rectangular plate, preferably of 25 >plateat points which will permit I.the measure a hard metal such as tool steel, hardened and ment »of Adistances not accurately measurable ground so that its opposite surfaces are parallel >.between .pairs of 'holes in the regularly disposed and flat. This plate has drilled therein a plu rality of rows of small holes, the rows being desig nated by the letters A, B, C,'D and E, and the holesin each row being numbered sequentially for ready reference; the letters and numbers shown being stamped or otherwise applied to the The holes are preferablyI rows (Ato «E. Since accuracy to four decimal .places is normally sufficient, vthe arrangement 30 shown is suitable for use within the limits indi cated. The dimensions named'arefnot intended .to-be _criticaL'but-rather togexemplify one form of the jig .While 4other forms would include spacing surface of the plate. _.'o‘f the holes. in’row A at distances of 116” vor m uniform in sizeV and are drilled accurately so that 35 'metric distances, the lother ‘rows being corre their axes’ are perpendicular to the surface of the plate' and their centers spaced predetermined dis tances apart. In the jig shown the plate is* tspondinglytmodiñ'ed. . ' . ~ The: jigxisvintended to `belused'in connection with' a Áreference ` table having distancesv arranged »2" X4”, with a thickness of T"e”; this thicknessY lin- regular .sequence opposite notations of »the could be reduced, for instance to à”, ii the jig 40 »hclesto :be used.' inmeasurement of ¿such l"dis is to be used only for drafting and layout work, while the full'thickness is desirable when machine '^tances’,.fas' Vfollows: ' ` ~ 2,411,776 Distance table Dist. Holes Dist. Holes Dist. Holes Dist. Holes 1250 1406 1562 1719 1x1-A1 132-42 -Bs-As 134-114 .6094 .6250 .6406 .6563 01-.41 02-142 03-.43 04-.44 1. 093s 1. 1094 1. 1250 1. 1406 D1-A1 i12-A2 13a-.43 134-44 1. 5781 1. 593s 1, 6094 1. 6250 111-141 i12-A2 11a-A3 114-144 ~. 1757 :B1-A2 .6719 05-.45 *1. 1547 G-A 16 1. 6406 E5-A5 . 1875 B5-.45 .6575 06-46 1. 1563 D5-A5 1. 6563 116-146 . . . . *_ 1381 Bz-îâ . 7031 07-147 1. 1719 D13-.46 1. 6719 E7-A7 ’. 2000 :B3-ài s. 7071 F-AZO 1. 1875 D7--A7 1. 6875 EB--AS Dist. Holes Dist. Holes Dist. Holes Dist. Holes .5000 B25-A25 *. 9767 C24-ggg 1. 465s B25-A25 ________________ _. *_ 5001 B24-gi . 0544 C25-A25 1. 4531 D24-A24 ______ __ .5156 1326-1126 1. 0000 026-1126 1. 4844 D26-A25 .5313 .5469 B27-A27 B25-.42s 1.0156 1.0313 027-1127 C25-.42s 1.5000 1.5156 f B27-A27 B2S-A28 5625 . 5781 B20-A29 B30-.430 1. 0469 1. 0625 029-1429 C30-A30 ' 1. 5313 1. 5469 1329-1429` D30-A30 ___ .593s 1531-1431 1. 0781 031-1131 1. 5625 1331-1431 111-1131 ._ In the foregoing table the distances marked 25 parallel to said second-named row and having :151:11 are interpolated into the regular sequence, as for instance to meet the special requirements of a particular user, and other such distances 4may readily be calculated (trigonometrically or its holes disposed in the same manner. 2. A device according to claim l in which the 'distance between the farthest spaced correspond ing holes in said ñrst and second-named rows is otherwise) and indicated as desired. 30 less than the distance between the nearest spaced In a like manner, the jig may be used, in con corresponding holes in the ñrst-named row and junction with a suitable table, to measure and the nearest additional row. lay out angles, Yone hole'corresponding to the 3. A device of the character described com lapex of the angle while the sides are located by prising a ñat rectangular plate provided with a selecting holes'which correspond to points there 35 straight row of equally spaced holes of substan on. Such a table may include the following ín tially equal diameters parallel to a side oi the dications, given by way of example: plate, and a plurality of additional rows of equally Angle table spaced holes parallel to each other and forming the same angle with the line of the first-named 40 row, corresponding holes in the several rows being 29°1’ __________________________ __ Al-El-AS equally spaced from the ends of the plate. 4F38’ „____' ______ __` ____________ __ A2-B2-A3 e. A device according to claim 3 in which the 81°52’ ________________________ .__ Al-Bl-AS difference in distances between any two adjacent The jig is used on machine work by passing a holes in the first-named row and corresponding 4°32’ ___________ _’_ _____________ _I A1-E1-A2 close-htting drill or punch through the selected 45 adjacent holes in any other row is the same as the diiîerence in distances between any other two holes in order to mark, for instance, the centers pairs of corresponding adjacent holes. for a further drilling operation; while in draft ing work a pencil or other pointed device may 5. A device according to claim 3 in which the be used for marking desired centers or other distance between the farthest spaced correspond - points. 50 ing holes in the ñrst-named row and any row It will be understood that various changes may other than the most distant row is less than the be made in the form, construction and arrange distance between the nearest spaced correspond ment of the device without departing from the ing holes in the first-named row and the row -spirit- and scope of the invention,` and hence I next beyond the row to which said ñrst-men do not intend to be limited to the details herein 55 tioned distance is measured. `shown and described, except as they may be in 6. A device according to claim 3 in which the cluded in the claims. distance between the farthest spaced correspond What I claim is: ing holes in the first-named row and any row l. A device of the character described com other than the most distant row is less than the prising a flat rectangular plate provided with a 60 distance between the nearest spaced correspond plurality of straight rows of holes, one of said ing holes in the first-named row and the row next rows being- parallel to a side of the plate and the beyond the row to which said ñrst-mentioned holes in said row being equally spaced, another distance is measured, the difference in said dis row being adjacent to said first-named row and tances being the same as the difference in dis having its holes disposed at progressively vary 65 tances between adjacent holes in the first-named ing distances, measured perpendicular to the row and corresponding adjacent holes in any line of the first row, from the holes in said first named row, and at least one additional row other row. ' CHARLES H. COLE.