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Патент USA US2404889

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'
July 30,> 1946.
D. F.V RlNGlE
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2,404,889
COLLOCATING GAGE
Filed Sept. 14, 1945
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July 30, 1946.
D. F. RINGlE
2,404,889
COLLOCATING GAGE
Filed Sept. 14, 1943
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Patented July 30, 1946
2,404,889
UNITED STATES PATENT OFFICE
2,404,889
COLLOCATDN'G GAUGE
` Donald F. Ringie, Springfield, Vt., assignor, by
mesne assignments, to the Goverment of the
United States of America
Application September 14, 1943, Serial No. 502,280
1
2
The present invention relates to a gauge and
more particularly to a collocating gauge adapted
to locate the axial plane of a transverse center
line across the end of a threaded object such as
a tube, rod and the like with relation to a pre
viously determined point on the thread of the
barrel to quickly and positively locate a trans
threaded object.
verse center line across the breech end of the
barrel in the correct axial plane with. relation»
to a point on the thread which may be the thread
start or a similar predetermined point.
It is a further object of my invention to provide
a gauge which will locate the correct axial plane
` In the manufacture of guns of the larger cali
of a transverse center line across the end of a
bersl employing breech blocks and the associated
gun mount and mechanisms it is customary to
provide a thread on the periphery of the breech
end of the gun barrel in order that the barrel
and the breech mechanism may 'be readily joined.
Gun >barrels of these types are also provided with
threaded gun barrel or other threaded object
` milled key iiats on their peripheries extending
longitudinally adjacent to the threaded ends of
the barrels to cooperate with suitable recoil
Which plane will intersect a predetermined point
on the thread, the design and mode of operating
the gauge being such that accurate and consistent
results may be easily obtained by relatively un
skilled operators.
By way of further describing the present in
vention reference will be made to the following
specification and drawings forming a part of this
application in which:
i ‘
mechanisms of the gun mounts. Keyways and `
‘ Figure 1 is a plan view of the gauge as seen
ejector pockets are also milled-out on the end
‘
i
faces of the breech ends of the barrels. In order 20 from above.
Figure 2 is a front elevation of the gauge.
that the key flats, keyways and ejector pockets
Figure 3 is a side elevation of the gauge.
'
will be in their correct planes and positions rela
Figure 4 is a top plan view of a portion of a
tive to the breech and gun mount mechanism
gun barrel constituting the breech end and show
after the barrel is fully threaded into the breech
mechanism, the transverse center lines through 25 ing the breech threads together with part of the
key flats.
lthe barrel defining these correct planes must be
Figure 5 is an end View of Figure 4 and showing
properly located in the correct axial planes on
the vertical transverse center line in the plane
the end of the barrel relative to the start of the
intersecting the point A on the breech thread.
breech thread on the barrel. Since the thread
is formed on the barrel prior to the machining 30 Figure 6 is a fragmentary section of the gun
barrel taken along the plane of the vertical axis
of the keys, keyways and ejector pockets, ver
of Figure 5 and showing the gauge in its opera
tical, horizontal and oblique center lines across
the breech end of the barrel must be located in
the transverse planes relative to a predetermined
point on the thread form corresponding to the
thread start. For example it has been deter
mined in one form of gun barrel that an axial
tive position.
i
Figure 7 is a section on the line 1_1 of Fig
ure 6 taken in a plane through the point A on
the breech thread.
' Referring to Figures 1, 2, and 3 of the drawings
the gauge of my invention is comprised of the
ringlike body member Ill having an opening
plane through the center line of the barrel and
intersecting a point on the front face pitch line
of the first thread, which point is exactly one 40 therethrough of greaterdiameter than the diam
eter of the end of- the gun barrel to be gauged.
inch -from the breech end of the barrel, is the
The 'body In is provided with raised and ma
correct axial plane for the vertical transverse
chined‘ locating surfaces H `and I2 which are
center line of the barrel when fully threaded into
adapted to Contact ‘the member to be gauged at
the breech mechanism. From this vertical center
line the corresponding horizontal and oblique
predetermined spaced points from its axis which
center lines can be determined for locating the
as shown may be on the periphery I3 of the end
of the gun barrel. To the gauge body I0 is at
tached a cross member i4. The cross member is
so located by the keys l5 and I6 that its edge l1
keys, keyways, ejector pockets and so forth, in
proper relation to the above mentioned thread
start and therefore in proper relation to the`
breech mechanism and gun mount when fully 50 passes through the axis of the threaded object
to be gauged and between the locating surfaces
threaded into the breech mechanism.
H and i2. The edge Il is intended to function
It is a principal object of my invention there
as a ruling edge for a scriber as shown in Figures
6 and 7 of the drawings, while the rear face of
external threads on the breech end of a gun 55 the cross member i4 is intended to contact the
fore to provide a collocating gauge mechanism
which may be employed in connection with the
2,404,889
3
4
end surface of the barrel or threaded object, as
barrel with the locating points II and I2 in con
tact with the periphery I3 of the barrel end and
with the cross member I4 abutting the end 28 of
the barrel. The gauge may only be thus posi
more clearly shown by Figure 6. Extending rear- `
wardly from the top of the body I0 is the angle
bracket I8 which is also located by means of
the key I9 so that its edge face 20 is located in 5 tioned when the thread contact 22 is extending
the same plane axially of the threaded object
into the thread groove between the ñrst and
to be gauged as theaedge I 'I'. Fastened to the
second threads. Since the thread contact 22 as
bracket I8 -'adjacent to'the edge 20 is a gauge
shown is of slightly less width’than the thread
member 2I having a thread engaging contact
groove some freedom of axial turning of the gauge
22 which may, if desired, be shaped to conform
_ in its gauging position will be permitted. The
to the thread form on the breech end of the gun
gauge is then gripped firmly and turned in the
barrel, but of slightly less width than the thread ¿
» direction of the lead of the threads until the knife
or thread groove. The thread engaging >contact
edge 23 of the thread contact22 and the rear face
' ofthe cross member I4 jam against their abutting
on the thread form and, as shown in detail by 15 surfaces. Since the previously mentioned knife
Figures 6 and 'I of the drawings, it will be seen
edge 23 is located exactly 1.000" from the rear
that it is provided with a knife edge 23 in align*-Í ' face of the cross member 28, and is also in align
ment with the ruling edge I'I to contact a point
ment with the ruling edge I1 of the member I4
on the pitch line of the thread. This is a pre-l
constituting a center line for the member to be
ferred form of the invention but it should be
gauged, a vertical transverse center line across
understood that the gaugel maybe so designed
the end of the gun -barrel may be located and
that the thread contacting member may be of
scribed by Contact with the ruling surface> I 'I. The
any form and may be located'in any position in
axial plane of the’center liner so located by -my
back of the body i0 providing that it contacts Y gauge will intersect the predetermined point'A
a predetermined point on the thread to thus
corresponding to the thread start. From the axial
establish a relationship between the axial plane
plane >of the vertical transverse center line thus
of the ruling edge Vi and the predetermined
obtained all of the other transverse center lines
point on the thread. The gauge member 2| as
such as horizontal, oblique, etc., may be located
shown is accurately positioned by the pin S so
for determining the positions of key ilats, key
22 is designed to contact a predetermined point '
that the knife edge. 23 willbe a predetermined 30 ways, and ejector pockets, in relation to the point,
distance from the rear face of the cross member
ill, which in this' instance is determined to be
1.000" at the pitch line of the thread form for
the contact 22. In the preferred form of my
invention the cross member I4, the angle bracket
A or the thread start of the breech thread.'
,
. It is to be noted that the gauge of my inven
tion provides 4 points of contact with the work to
be gauged. The contact points as previously de*
scribed are the spaced locating surfaces II and
l2, the rear face of the cross member I4, and the` i
knife edge 23 of the thread Contact k22. With
£8 and the gauge member 2 l are all non-adjust
ably attached to the gauge body I0 and are,
therefore, accurately machined to be assembled
~ these four points of contact it should be readily
in exact alignment, 'although it should be under
seen that a positive gauging action is obtained,
stood that adjustments may be provided if de 40 minimizing all errors due` to tilting and pivoting
sired..
‘
at the gauge points of contact. The jamming
Figures 4 and 5 of the drawings are to be con
eifect obtained by the interaction of the rear face
sidered as showing a portion of the breech end of
of the member I4 and the knife edge 23 is of such
a gun barrel on which the gauge of my invention
is intended to be used. Figure 4 which is a top
plan view shows the gun barrel to be provided
with a breech thread 25 for attachment to a
breech mechanism. Key ñats or ñns 26 which co
operate with the recoil mechanism of a gun
mount. (not shown) are milled on the outer sur
face of the barrel adjacent to the breech thread.
The flats 26 are shown to be completely machined
although the dotted lines 21 of Figure 5‘ show the
amount of metal on the-surface of a gun to be re
moved by a milling operation in order to produce .
these flats. As previously stated, the breech
thread 25 is customarily formed prior to the
milling of the key ,ñats and therefore the hori
zontal transverse center line on which thev key
flats are located must be- located in the correct
axial plane relative to the start,` of the thread 25
or a similar predetermined point. ‘It has been
determined in one instance Athat the point A
shown in‘Figures 4 and 5 to be positioned on the
pitch line of the front face of the first thread, and i
which point is exactly 1.000” from the end of the
gun barrel, should >be the point of intersection
with the axial plane of the vertical transverse
center line 29.
The operation of the gauge of my invention to -
locate the axial plane of a vertical vtransverse
center line 29 relative to the point A will be readily
understood by referring to Figures 6 and 7 of the
drawings. The body member I0 is placed in a
position surrounding the machined end of the gun
positive nature that consistently accurate results
will be obtained even when the gauge is used by
different operators of varying skill.
.
I claim:
l. A collocating gauge for determining theA axial
plane of a transverse center line across the end
of a threaded object in relation to a predeter
mined point on the thread, comprising a body
member having a pair o-f locating elements
adapted to contact at spaced points with the
periphery of the member to be gauged, across Y
member ñxed to said body and adapted to contact
the end surface of the member to be gauged, said
cross member having a ruling edge passing
through the axis of the threaded portion when
said locating elements are in contact with lsaid
periphery, and thread> contactingy means posi
tioned rearwardly from said kcross memberY at a
predetermined distance to engage the thread in' a.
predetermined relation to said predetermined
-point on the thread of the member to be gauged.
2. A collocating gauge for determining the axe
ial plane of a transverse center line across the
endof a threaded object in relation to a predeter
mined point on the thread, comprising a body
member having a pair of locating _ elements
adapted to contact at spaced points with the pe
riphery of the member to be gauged, a crossrnem-V
ber fixed to said body and adapted to contact the
end surface of the memberto be gauged, said
cross member having a yruling edge 4passing
through the axis of the threaded'portio‘n when.
5
2,404,889
said locating elements are in contact with said
periphery, and threadcontacting means posi
tioned rearwardly from said cross member in
alignment with said ruling edge at a predeter
mined distance to engage the thread in a prede
termined relation to said predetermined point on v
the thread of the member to be gauged.
3. A collocating gauge for determining the axial
6
predetermined point on the thread of the mein
ber to be gauged.
5. A collocating gauge for determining the ax
ial plane of a transversecenter line across the
end of a threaded object in relation to a prede
termined point on the thread, comprising a body
member having a pair of locating elements
adapted to contact at spaced points with the pe
plane of a transverse center line across the end
riphery of the member to be gauged, a cross mem
of a threaded object in relation to a predeter 10 ber ñxed to said body and adapted to contact the
mined point on the thread, comprising a body
end surface of the member to be gauged, said
member having a pair of locating elements
adapted to contact at spaced points with the pe
cross member having a ruling edge passing
through the axis of the threaded portion when
riphery of the member to be gauged, a cross mem*
said locating elements are in contact with said
ber fixed to said body and adapted to contact the 15 periphery, and thread shaped thread contacting
end surface of the member to be gauged, said
means having a knife edge positioned rearwardly
cross member having a ruling edge passing
through the axis of the threaded portion when
said locating elements are in contact with said
periphery, and thread contacting means having a
knife edge positioned rearwardly from said cross
member at a predetermined distance to engage
the thread in a predetermined relation to said
predetermined point on the thread of the member
to be gauged.
4. A COllOCating gauge for determining the ax
ial plane of a transverse center line across the
end of a threaded object in relation to a. predeter
mined point on the thread, comprising a body
from said cross member in alignment with said
ruling edge at a predetermined distance to en
gage the thread in a predetermined relation to
said predetermined point on the thread of the
member to be gauged.
6. A collocating gauge for determining the ax
ial plane of a transverse center line across the
end oi.’ a threaded object in relation to a. predeter
mined point on the thread, comprising a body
member having a pair of locating elements
adapted to contact at predetermined points
spaced from the axis of the member to be gauged,
a cross member fixed to said body and adapted to
member having a pair of locating elements 30 contact the end surface of the member to be
adapted to contact at spaced points with the pe
gauged, said cross member having a ruling edge
riphery of the member to be gauged, a cross mem
passing through the axis of the threaded portionV
ber fixed to said body and adapted to contact the
when said locating elements are in contact with
end surface of the member to be gauged, said
said predetermined points, and thread contacting
cross member having a. ruling edge passing ‘
through the axis of the threaded portion when
said locating elements are in contact with said
periphery, and thread shaped thread contacting
means positioned rearwardly from said cross
member at a predetermined distance to engage
the thread in a predetermined relation to said
means positioned rearwardly from said cross
member at a predetermined distance lto engage
the thread in a predetermined relation to said
predetermined point on the thread of the mem
ber to be gauged.
DONALD F. RINGIE.
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