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Патент USA US2369319

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Feb. 13, 1945.
’ 15. T. SMITH
GAUGE
Filed May 31, 1945 '
_ l2,369,319
Pagina Feb. 13, 194s
'
1 2,369,319 N
' ` - j UNITE-D 'STATES “PATEnrÍorFlcs 'i
a
.
_
assaut
`dauer:
a,
raul ".r. smnasmw'v, Mien., saigner 'to dem
Corporation, Detroit, Mich., a cor
eral ’ Motors
poration or Delaware
`
_
Application my s1, 194s, semi N». 489,140
'z claims.
(c1. .sa-sus)
'
capes is not adjacent >the surface being tested.
This invention relates to measuring and test
ing apparatus and more specifically to that type
of measuring' apparatus operating on the princi
but-is remotely controlled from parts contacting
that surface which avoid ‘errors introduced by
rough surfaces and abnormal conditions;
ple of leakage ofair for determining distances or
dimensions. There have 'been in use for some
time air gauges which operate on the principle of
air leakage from- a testing or -checking- nozzle
It is a still further object of- my invention to
provide a portable checkingnozzle that may be
utilized over a considerable distance for dimen
, which is placed in juxtaposition to the piece to
be tested. The amount of air which leaks or is
sioning purposes.
-
with these and other obìects
view which emittedírom openings in the nozzle, and through 10 will become apparent as the speciilcation pro
the opening remaining betweenrthe piece to be
ceeds, the ‘embodiments of my invention will be
checked and the nozzle, is a measure of the di
mension. Such a testing mechanism- is shown
best understood'by reference to the following
specification and claims and the illustrations in
the accompanying drawing, in which:
‘
and described in a copending application, Ser.
Figure 1 is a transverse sectional view through
No. 408,047, tiled August 23, 1941, in the name 15
of Fred Rupley, and entitled “Air gauge." In
a device embodying my invention.
Figure 2 is an enlarged partial sectional View
that instance, however, the nozzle or projecting
taken substantially on lines 2-2 of Figure 1.
portion having the openings therein through
Figure 3 is an enlarged sectional view showing
which air is caused to leak is rigidly secured to
20A the engaging tip Aof the measuring nozzle.
a casting' upon »which the meter which measures
Referring new more specifically to the draw
the pressure within the housing is mounted. In
other Words, this mechanism is designed to be
ing, a casing or housing‘Z is provided which has I
a substantially center bore I extending for a
piece to be tested there then carried or brought
considerable distance through the center there
to the bench, and if the dimension to be checked 25 of.l The outer end of this -bore is enlarged as
is of internal diameter, placed over the test noz
shown at 6 in Figure 1 and the interior portion
placed upon -a bench or other support and the `
' zle and the reading on the dial checked.
thereof is threaded as shown at 8 to carry a noz
'I'here are many instances in which it would
zle I0 which may be ‘screw-threaded into this
be more desirable to be ‘able to move the test noz
hollow portion and which in turn has a central
30
zle or bring it to the means to be tested or checked.
bore I2 therein. The ‘in-Ward or rear >portion of
such, for example, _as la large ,casting in which
the internal bore I2 is larger than the outer por
there are openings of a certain diameter and in '
tion and threaded as shown at I4. A longitudi
that case it would be physically impossible to
nal shaft I6 extends through the central open
carry the casting to the relatively ilxed checking
ing I2 in the nozzle III and also back through the
35 central bore lof the main casing 2 which is in
Also lin the previous case the openings from
alignment therewith. _Slightly back from the
which the‘air is permitted to escape are brought
forward end of this shaft I6 is Va iixed collar `I8. .
nozzle.
'
,f
-
into close proximity with the part to be tested
A cylindrical slidablecollar 20 havingiits exterior
and air escapes between the test part and the
surface threaded is mounted on the approximate
nozzle. ‘Under certain circumstances it would be 40 center of the shaftA Mi and screwed into the
advisable not to have the air flowing at this
threaded opening Il in the nozzle to compress
checking point but rather have the checking point
between its inner surface and the forward collar
control the ilow _of air at a remote position not
I8 a compression spring 22 which therefore biases
in actual contact with the test part.
the shaft I6 toward its outward position, which
45
It is,` therefore, an object of my invention to
in Figure 1 is toward the right.
provide a portable testing or checking nozzle.
The outer end of the shaft I6 has a tapered or
It is a further object of my invention to pro
conical nose 24 which is adapted to engage a pair
vide a portable checking nozzle which may be
of ball bearings 26 and 28 supported ina trans
Y connected to a remote indicating means.
verse slot 30 in the end of the nozzle. Asbest
It is a further object of my invention to pro 50
shown in Figure 3, a portion of this transverse-
' Vide' a checking nozzle in which the variable fluid
escape port is remotely controlled.
a
a
slot 30 is )curved as `shown at 32 on each side to
prevent these balls from being ejected from this
It isa further object of my `invention to pro
- slot when the shaft I6. is forced tothe right.
videv a portable checking nozzle in |which the
„u
They are therefore maintained securely against
variable opening through which the iiuid es
2,369,319
2
air or ñuid therefore _ñows- within the
this portion 32 andagainst the front'portion of
the slot.
»
part and
any errors that might be _introduced into the
reading by excess -air escaping through rough
spots or abnormal conditions is avoided. The
«
A transverse channel 34 is provided in the ap
proximate center of the casing 2 and intersects
the bore 4 which carries the rear end of, the 5 fluid or air escaping through vent 34 is directly
proportional to the exact dimension across the
reciprocatory shaft I6. This `sh'aft I6 has a
outer surface of the two balls 26 and 28. Any
diametrical opening 36 therein having a diameter
abnormal conditions may be measured by rotat
smaller than the transverse duct 34 and in rest
ing the test unit within the bore being measured
position substantially in alignment therewith.
Therefore as the shaft I6 is reciprocated, the two 10 and if any variation in the reading of the gauge
isl observed) the bore is not truly circular.
openings will move out of alignment and vary the
flow of air or other iiuid through this duct 34,
1. In a portable gauging device, a casing,
depending upon the position of the shaft I6.
longitudinally reciprocable means within the
These two openings therefore by their amount of
eccentricity- act as a. valve to control the flow of 16 casing, said casing and reciprocable means hav
ing alignable openings for ñuid 4flow there
fluid therethrough.
e
through whereby any relative motion between
In the rear portion of the casing 2 is an open
them causes a -valve action to~ alter said ñuid
ñow and radially movable means in said casing
to cause reciprocation of the longitudinal means.
the opposite end of- which may be connected to
2. In a. portable gauging device, a casing,
the indicating gauging means (not shown). This' 20
ing 38 to which it is intended to secure one end
of a source of fluid pressure such as an air hose,
opening 381s connected to a second transverse
longitudinally
duct 40 which-in turn is connected to a longi
within the casing, said casing and reciprocable
reciprocable
means
mounted
tudinal duct 42 which terminates in the trans
verse, duct 34 formerly described. A series of
therethrough whereby `any relative motion ~be
means having alignable openings for ñuid flow '
threaded cap screws 44, 46 and,” are provided 25 tween them causes a valve action to control said
in the ends of these ducts to close the same,
.permitting access'cfor cleaning if necessary. One
side of the reciprocable shaft I6 has a >keyway
or flattened portion 50 cut therein into which
projects a pin 52 threadedly secured in the cas
ñuid iìow and radially movable means carried
by ' the casing extending beyond the surface
_thereof adapted to engage surfaces to _be gauged,
30
ing 2 to act as a lock to prevent rotation of
radial movement of which causes reciprocation
of the reciprocable means.
'
’
3. In a portable gauging device, an elongated
cylindrical casing having an axial opening there
the reciprocable shaft and to act- as a limit stop
through for a substantial portion of its length
for movement. in the axial directions.
intersected by a transverse opening, a recipro
Therefore in the operation of this device the
opening 38 is connected to the ilexible hose of 35 cable member carried> in the opening and having
an opening therethrough which is adapted to ‘
any desired length, which, asfbefore stated,4 ex
tends to the actual gauge -or pressure indicator
and the fluid pressure applied. The nozzle I0 is
register with the transverse opening in the cas
ing and radially movable means to cause said
then inserted into the opening which it is desired 40 means to reciprocate and vary the `registering
to check in the same manner that a plug gauge
would be used, which action causes the two lballs
26 and 28 to be forced inwardly, which in turn
causes the shaft I6 to be pushed to the rear or
toward the left. This moves the opening 36 out
of alignment with the opening 34 and therefore
reduces thesize of the opening through whichv
the air can flow along the pathshown 'by the
arrows.
This is illustrated by the dotted line '
opening area.
4. In gauging means, an elongated casing
having a longitudinal bore therethrough for- a
substantial portion of its length intersected by
a transverse’bore, said longitudinal bore being ,
of different diameters,. a. hollow nose piece
secured in the longitudinal bore, a reciprocable
shaft carried by the longitudianl bore and the
- nose, said shaft having an opening therethrough
position in Figure 2. Thus the smaller the diam
adapted to align with thetransverse casing bore
eter the more the balls 26 and 28 will be forced 50 whereby the two act as a valve, means for ap
inwardly and the farther the shaft II6 will be
plying fluid pressure tothe transverse bore and
forced to the left to cutoff air from escaping
means to reciprocate the shaft in accordance
through duct 34. The actual position of the
with a size to be gauged.
.x
balls> 26 and 28 within the diameter is not im
5. In gauging means, an elongated casing
portant, it only being necessary to set the gaug 55 having a longitudinal bore therethrough for a
ing means or indicator to a definite position
substantial portion of its length intersected by
initially before gauging a series orf pieces of the
a transverse bore, said longitudinal bore being
same configuration -or dimension. Then if by
of different diameters, a hollow nose piece
inserting the nozzle into the openings being
secured in the longitudinal bore, a reciprocable
vchecked the indicating needle comes within co shaft carried by the longitudinalbore and the
limitationsV of variation from the original mark,
nose, said shaft having an opening therethrough
the piece is acceptable.
.
adapted to align with the transverse casing bore
For different diameters of course different
whereby the two act as a valve, means for apply
nozzles would have to be inserted into the end
ing fluid pressure to the transverse bore, resilient
of the casing 2. The length of the end> of the
biasing means to bias the shafttoward one ex
nozzle o-f course would also vary,.depending upon
tremity and means acting to compress the bias-.
the depth of the opening. whìchit is necessary
ing means to reciprocate the shaft movable in
to check. It is desired to point out that in
this construction- the fluid does not leak or escape ~
accordance with a dimension to be measured
to the atmosphere at a location between the
mounted in the nose piece.
nozzle andthe part being gauged as in prior
apparatus, but rathe1` through a. vent in the cas
ing 2, the flow through which is controlled
through the position of shaìft I6 as determined
'
substantial portion of 'its length intersected b-y
6. In gauging means, an 'elongated casing
having a longitudinal bore therethrough for a
a transverse bore, said longitudinalfbore being
by the floating ball location within the part. No 76 of diiïerent diameters, a hollow nose piece »
aseasia
secured in the longitudinal bore, a reciprocable
shaft carried by the longitudinal bore and the
nose, said shaft having an opening therethrough
adapted to align with the transverse casing bore
whereby the two act as a valve, means for ap
plying :tluid pressure to the transverse bore, l
biasing means to bias said shaft toward one
extremity, radially movable members mounted
in the nose adjacent the shaft end, Vsaid latter
having a tapered section whereby upon radial
movement of the means the shaft will be re
ciprocated.
'
`
7. In gauging means, an elongated casing
having a longitudinal bore therethrough for a
3
of diiîerent diameters, a hollow nose piece
secured in the longitudinal bore, a .reciprocable
shaft carried by the longitudinal bore and the
nose, said shaft having an opening therethrough
adapted to align with the transverse casing bore
whereby the two act as a. valve. means for apply
ing fluid pressure to the transverse bore, bias- Y
ing means to bias said shaft toward one ex-„
tremity, radially movable members mounted _in
the nose adjacent the shaft end, said latter Vhav
ing a tapered section whereby upon radial move
ment of the means the shaft will be reciprocated,
said radially movable members having a por
tion extending beyond the casing surface to
substantial portion of its length intersected by 15 directly engage the surface to be measured.
a transverse bore, said longitudinal bore being
PAUL TÍ. SMI'I'H.
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