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Патент USA US2411776

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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.
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