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Патент USA US2412413

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Dec. 10,1946.
Ü
R_Y_MOSS
"
’
2,412,413
GAUGING DEVICE
lFiled Aug. 2, 1945
ATTORN EY
2,412,413
Patented Dec. 10, 1946
UNITED STATES PATENT OFFICE
2,412,413
GAUGING nevica
Richard Y. Moss, Dayton, Ohio, assigner to The
Sheflield Corporation, Dayton, Ohio, a corpora
tion of Ohio
Application August 2, 1945,.Serial No. 608,477
5 Claims. (Cl. 33-174)
1
This invention relates to gauging devices and
more particularly to gauging devices that measure
or compare the size of workpieces by gauging the
flow of iluid through leakage orifices.
One object or” the invention is the provision of
a gauging device embodying a pair of upright
tapered flow tubes having floats responsive to the
air flow through the tubes and each~ connected
to a gauging member which is adapted for co
operation with male and female parts intended
to interfit with one another, adjustable index
members being provided for the two tubes and
2,
gauging device and the amount of clearance that
piston would have in that cylinder can be ob
served. T‘hus, the gauging device includes a work
engaging spindle li», see Fig. 1, adapted to enter
the hole of the cylinder or other workpiece to be
gauged, and a gauging member l I having a groove
or opening i2 to receive the piston or other male
part intended to interfit the cylinder. The spin
dle Hl has a leakage orifice or gauging nozzle I3
that cooperates with the inner surface of the
workpiece or cylinder so that the clearance be
tween the outer surface of this gauging >nozzle
and the workpiece determines the amount of
leakage ci duid supplied to the nozzle. The rate
of fluid flow is shown by float I4 operable in a
spondingly'in an opposite direction.
Yflow tube l5 carried by the housing i5 of the
Another object is the provision of a gauging
gauging device. A flexible conduit Il connects
device having a pair of flow tubes with indicating
the gauging spindle lil to the upper end of the
means responsive to the rate of iiow of fluid
ñow tube l5. Air is supplied to the gauging in
through gauging nozzles provided in members
intended for cooperation with interfltting male 20 strument from the -factory air line and its pres
sure is automatically held constant at any de
and female parts to be checked or gauged, inter
sired value by a suitable pressure regulator which
connected index members being arranged for
supplies the air under pressure to the lower end
movement in opposite directions whereby the
of the flow tube i5. The internal passage through
movement of one indeX member to a point adja
the flow tube tapers upwardly and gradually so
cent the indicating means of one tube will auto~
that as the float is carried upwardly by the flow
matically adjust a scale member or index for the
ing air, the distance between the float and the
other tube for direct reading of the clearance
walls of the tube increases. The ñoat thus as
between the male and female parts being gauged.
sumes some position of equilibrium depending
Other objects and advantages of this invention
will be apparent from the following description, 30 upon the amount of flow taking place through
the gauging nozzle.
the appended claims and the accompanying
The gauging member H is also provided with
drawing, in which7
so arranged that as one of these members moves
in one direction the other member moves corre
Fig. 1 is a perspective view of a gauging device
a gauging orifice at one side of the slot or open
embodying the present invention;
ing, cooperating with the outer surface of the
showing the indicating and flow tube portions of
the gauging device;
that slot and facing towards the workpiece axis.
A flexible fluid conduit i9 places the gauging
Fig. 2 is a front elevation on an enlarged scale 35 workpiece or piston that might be arranged in
Fig. 3 is a horizontal section of the line 3_3
of Fig. 2; and
Fig. 4 is a vertical section of line 4-4 of Fig. 2.
oriñce in communication with the upper end of
a second flow tube 2t, which is arranged adjacent
to or alongside of the tube i5. The tube 2D is
similar to the tube l5 and is provided with a iloat
2l responsive to the rate of flow of fluid through
Referring more particularly to the drawing,
the invention as herein illustrated is incorporated
that tube. The housing l@ is provided with suit
in a gauging device for directly comparing or
able supporting means for the tubes, which are
measuring the clearance between male and fe
male workpieces intended to cooperate with one 45 visible through an opening 22 in a front cover
another in interíitting relation,vthese two work
plate 23.
An index arm 25 is adjustably mounted for
movement along the tube l5. It has an index
mark or line il@ that can be placed opposite the
float is wherever that float might be
patent of Willis Fay Aller, #2,254,259, granted 50 top of
when the spindle lil is entered in the cylinder
September 2, 1941. In accordance with the pres
to be gauged. This index arm is provided on a
ent invention, pistons can be successively applied
block 21 which is guided for movement along the
to the gauging device and at the same time the
groove 28 in the housing E6. The front cover
cylinder in which any piston is intended to co
operate can be applied to another portion of the 55 plate 2i, which is secured to the housing by suit
pieces being gauged simultaneously by separate
Work engaging members and similar flow tubes
of the character more fully disclosed in the prior
2,412,413
3
' 4
able screws 29, holds the block 21'in the groove.
The block 21 has a passage parallel to the length
pieces to be gauged are then applied to the gaug
ing
Y of the tube, receiving a flexible cable 3 l. A thumb '
screw 32 threaded in the block 21 serves as a
clamp to secure the cable and the block together,
the thumb screw projecting through the clear
ance space between the cover plate 23 and the
housing I6 so it may be conveniently operated
from the exterior of the housing whenever it is
members.
1
ì
'
Suppose that the float lll'takes some new posi
tion when the workpieces are applied. The knob
44 is then turned until the index arm 25 is directly
opposite this new position of the float. That
automatically adjusts the scale plate 36 so that
its Vzero mark should be opposite the float 2| if ' v
there is the exact desired clearance between the
necessary'to adjust the relative position of the 10 male and female members being gauged as
existed in the masters. However, if this clearance
block and the cable.
i
is alittle more or little less, that willV be directly
At the opposite side of the housing there is
shown by the position of the float 2l with respect
another groove 33 guiding another block 34 hav
to the scale markings on the index plate 36.V If
ing a thumb screw 35 which connects the block
to the flexible cable 3|. This block is also pro 15 lthe clearance is a little bit more than the exact
1/1o,ooo of an inch desired, the top of the float 2| ~
vided with an index member 3B. The arrange
would be a little above the zero mark and the
ment of the block, the cable and the grooves are
amount of this increase of clearanceis directly
similar for the two index members, but the index
shown
by the graduations on the index or scale
members themselves are diiîerent as will be de
20 plate 35. The exact size of the male or of the
scribed.
female member need not be known, but the exact
The cable 3| extends upwardly from block 21
clearance that would exist between the parts is`
and is guided around guide pulleys 38 and 39.
gauged
directly in accordance with the present
It then extends down through the block 34 and
invention. Parts can therefore be selected t
around guide pulley 4|), then over to an operat
ing drum 4|. , It may have two turns around this 25
drum so that as the drum is turned the endless
best cooperate with one. another.
'
v
It will be obvious that if the male part being
gauged is slightly smaller than the standard,
cable will be moved equally, moving the two index
the increased air now through the tube 20 causes
members and the two blocks, but in opposite
the
float 2| to assume a somewhat higher posi
directions. The drum 4I is connected to a shaft
42 Ythat extends through an opening 43 in the 30 tion than with the standard. If the female part
being gauged at the same time is also a little
`cover plate 23 as shown in Fig. 4. A hand knob
44 is pinned to this shaft 42 so that the drum
can be turned by means of the knob 44.
smaller than standard there would be less ilow
through the tube I5, so that as one float lowers
‘
theother ñoat should correspondingly rise, if the
The grooves in the guide pulleys 38, 39 and 40
clearance between the workpieces is the desiredV
are preferably V-shaped and so arranged that
amount. Where the only >reading desired is the
they contact the cable along their inclined side.
amount of clearance'between the male and fe
The cable is preferably held taut by a weighted
male
parts being gauged at the same time, itis
roller 46 pivotally mounted in the housing at one
unnecessary to provide a scale along the side
side of the roller axis. The roller bears down 40
of the tube I5, but if the exact size of the female
wardly on the cable between the pulley 4|! and the
member is to be determined, a scale plate 5D,
drum 4|.
provided with graduations, is arranged along the
The index member 36 that is carried by block
tube I5 so that the size of the female part will
34 is in the form of a scale plate having scale
be shown by the scale readings in comparison
readings above and below the zero mark. The
to
the readings on the scale when the female
readings on this scale plate directly show the
standard is used. The scale plate 56 may also
plus and minus variations from the desired clear
extend _around back of the tube> 28 and` have
ance between the male and the female members
being gauged at the same time.
graduations that maybe used in conjunction with
that tube if desired. -The graduations on this
'
Assume that theY spindle I0 engages a female
work-piece or cylinder and a plunger or piston
-scale plate need not be considered, however, in
merely gauging the clearance between two parts
is applied to the gauging member Vl I. The piston
and -the cylinder are intended for interfìtting
relation and it is desired to know if the amount
of clearance these parts will have with one an- ,
other is too much or too little.
The leakage
present at the gauging orifice I3 determinesthe
level of the float I4, and the leakage at the
gauging orifice at the side of the groove I2 de
termines the height of the float 2|. Assume that
the male and female pieces being gauged are the
standards or masters, and are of» exact known
size'with the proper amount of clearance. This
clearance may perhaps be l/mooo of an inch in
case of certain kind of pumps and the amount
of permissible tolerance from that desired clear
ance may be one half that total clearance, plus
or minus. With the standard pieces applied, the
knobY 44 is adjusted until the index 25 is directly
opposite the float i4 wherever that ñoat may be.
The thumb screw 35 is loosened and the index
or 'scaleV plate 35 is then moved along the cable
until its zero line is directly opposite the top of
the ñoat 2| wherever that float may be. YThis
adjusts the gauge for the masters, and the Work
intended to interñt with one another.
While the formrof apparatus herein described
constitutes a preferred embodiment of the in
vention, it is to be understood that the inven
tion is not limited to this'precise form of appara
tus, and that changes may be made therein with
out departing from the scope-oftheinvention
which is defined in the appended claims.
What is claimed is:
`
l. A gauging'device comprising a pair of up-right flow tubes of tapering internal cross sec
tional area, a support on which said tubes are
arranged with their smaller ends lowermost, a
work engaging member connected to one of said
tubes and having a fluid discharge gauging noz- `
zle adapted for cooperation with the interior
surface of a workpiece,V a work engaging Vmember '
connected t0 the other of said tubes and having
a fluid discharge gauging nozzle adapted for co
operation with the exterior surface of asecond
workpiece intended to interfit with the iirst work
piece, said tubes Veach having a float operable
thereinin response to the rate of flow of fluid
7.5,' through
the respective gauging nozzles, Yan ad
2,412,413 -
5
justable index member for each of said tubes
adjustably mounted for movementI along the
length of their respective tubes, and means in
terconnecting said index members to cause equal
but opposite movement of said members.
Ul
right iîow tubes of tapering internal cross sec
tional area, a support on which said tubes are
piece, said tubes each having a iioat operable
members to cause relatively opposite movement
arranged with theirsmaller ends lowermost, a
work engaging member connected yto one of said
tubes and having a iluid discharge gauging nozzle
adapted ior cooperation with the interior surface
2. A gauging device comprising a pair of up
of'a workpiece, a Work engaging member con
right flow tubes of tapering internal cross sec
nected to the other of said tubes and having a
tional area, a support on which said tubes are
fluid discharge gauging nozzle adapted for co
arranged with their smaller ends lowermost, a
operation with the exterior surface of a second
Work engaging member connected to one of said
workpiece intended to interñt with the first work
`tubes and having a iiuid discharge gauging nozzle
piece, said tubes each having a float operable
l adapted for cooperation with the interior surface
therein in response to the rate of flow of ñuid
of a workpiece, a Work engaging member con
through the respective gauging nozzles, an index
nected to the other of said tubes and having a
fluid discharge gauging nozzle adapted for co 15 member for each of said tubes adjustably mount
ed for movement along the length of their re
operation with the exterior surface of a second
spective tubes, an interconnection for said index
workpiece intended to interñt with the ñrst work
of said members, means for operating said inter
therein in response to the rate of flow of ñuid
through the respective gauging nozzles, an index 20 connection to move said index members and
means for relatively adjusting the position of said
member for each of said tubes, means< for ad
justably supporting said index members for move
ment along the length oi' their respective tubes,
index members with respect to said interconnec
opposite movement.
indicating the clearance between the workpieces.
tion.
5. A gauging device comprising a pair of up
means interconnecting said index members to
cause equal but opposite movement of said mem 25 right flow tubes of tapering internal cross sec
tional area, a support on which said tubes are
bers, and means operable to adjust said members.
3. A gauging device comprising a pair of up
arranged with their smaller ends lowermost, a
Work engaging member connected to one of said
right ilow tubes of tapering internal cross sec
tubes and having a fluid discharge gauging nozzle
tional area, a support on which said tubes are
arranged with their smaller ends lowermost, a 30 adapted for cooperation with the interior surface
of a workpiece, a work engaging member con
work engaging member connected to one of said
tubes and having a fluid discharge gauging noz
nected to the other of said tubes and having a
fluid discharge gauging nozzle adapted for co
zle adapted for cooperation `with the interior
operation with the exterior surface of a second
surface of a workpiece, a work engaging member
connected to the other of said tubes and having 35 workpiece intended to interlit with the iirst work
piece, said tubes each having a float operable
a iiuid discharge gauging nozzle adapted for co
operation with the exterior surface of a Second
therein in response to the rate of flow of fluid
through the respective gauging nozzle, an ad
workpiece intended to interiit with the iirst work
piece, said tubes each having a float operable
justable index member for each of said tubes,
therein in response to the rate of flow of fluid 40 means for guiding said index members for move
through the respective gauging nozzles, an ad
ment along the lengths of their respective tubes,
justable index member for each of said tubes,
a ñexible cable interconnected to said members,
one of said index members having a scale showing
means guiding said cable to cause equal but oppo
plus and minus variations from a normal clear
site movement of said members, means for mov
ance between the two workpieces, and means in 45 ing said cable to adjust said members, and an
ter-connecting said indexes for simultaneous but
index scale on one of said »members for directly
4. A gauging device comprising a pair of up
.RICHARD Y. MOSS.
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