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oct. 22, 1946.`
R. E. BAUERTHREAD CHECKER
`Filèd Nov. 1o, 1944 .
2,409,924
Oct. 22, 1946.
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R'
THREAD
BAUER
2,409,924
GHEGKER
Filed Nov. 10 ,_ 1,944
¿5f
3 Sheets-Sheet 2
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errbmwsyo:
ÜCÍÃ 22,. 1946.- ‘l
R, E, BAUER
THREAD CHECKEÈ
2,409,924
. Filed Nov. 10”( 1944' '
_ 3 Sheets-Sheet 5
INVENTÓR.
)îzfáseZZZÍZîdlleß’ '
BY
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H fr0/7” Era.
2,409,924
rammed oct. 22, 1946
UNITED STATES PATENT oFEicE
2,409,924
THREAD cHEoKER.Russell E. Bauer, Detroit, Mich.
Application November 10, 1944, Serial No. 562,752
3 Claims. (c1. as_me)
.
l
2
and pointed ends which arevadapted to be re
The present invention relates to thread Check~
ceived within centered recesses formed in the
ing 'devices and particularly relates to such de
ends of the workpiece 6 so that the workpiece 6
vices for checking the drunkenness and lead of
is properly centered on the mounting member 2
threads.
The primary object of the present invention is 5 with the axis of the workpiece extending parallel
to the axis of raceways 3 and 4.
to provide improvements in devices of the type
The member 2 is generally U-shaped and has
mentioned by which the drunkenness and/ or lead
upwardly extending arms 9 and I0, upon which
of a thread may be quickly and accurately
checked. The term “drunkenness” or “drunken
lead” is known and understood in the art as a
thread which is staggered from a true helical
thread, and while the lead may check by meas
urement along one side of the threaded work
piece >in a certain plane, in a plane opposite
thereto or on the opposite sides of the workpiece
in the same plane the thread may be off from the
true helix.
Other objects of the invention will become ap--
parent from the following speciñcation, the
drawings relating thereto, and from the claims
the centers 'l and 8 are mounted, respectively.
The upper surfaces of the arms are for-med with
T-slots II which receive the heads of screws I2
therein. The screws extend upwardly through
the centers 'i and 3 and have thumb nuts I3
threaded to the upper ends thereof so that the
centers l and 8 may be ñxed in their longitudinal
positions on arms 9 and Iß. One of the centers,
such as l, is hollow and has a compression spring
I4 disposed therein, one end of which abuts
against the inner surface of the center 1 and the
20 opposite end of which abuts against a block I5
which is also received within the hollow center
l. 'I‘he shank of the screw I2 extends through
the block I5 and through elongated openings I6
formed in the center l so that the center 'I may
l, Figure l is a top plan view of the thread check
ing and Ymeasuring device embodying features of 25 may be resiliently urged toward the workpiece.
Clamping member I'I is disposed under the thumby
the present invention;
I
screw I3 and engages the upper surface of the
Fig. 2 is a view taken in the direction- of the
center] so that such center may be frictionally
arrow 2 of Fig. 1, with parts removed and show
held in its longitudinal position.
`
ing parts in cross-section thereof;
A pair of oppositely disposed thread contact
.. i Fig. 3 is an end elevational view taken in the »
ing members I8 and I9 are mounted on the base l
direction of the arrow 3 of Fig. 1 and with one of
and are positioned to engage the thread of the
the centering means removed;
workpiece on opposite sides thereof. The mem
Fig. 4 is a cross-sectional View taken substan
bers I 8 and I9 have pointed ends which engage in
tially along the line 4_4 of Fig. 1; and
the thread. The contact member I8 is mounted
Fig. 5 is a fragmentary end view taken from
hereinafter set forth.
In the drawings, in which like numerals desig
nate like parts in the several views throughout:
the left end of Fig. 2.
.
on an upstanding bracket 29 which may be fixed
to one side of the base I. The member I8 is re
Referring to the drawings, the thread measur
ceived through an aperture 2l formed in the
ing and checking device comprises a base I hav
member 20 and may be adjustably ñxed therein
ing a workpiece carrying and supporting member
2 mounted thereon. The supporting member 2 40 by means of a setscrew 22.
The member I9 is relatively long and is mov-`
is Vmounted for longitudinal translation and
ably mounted on the top surface of a carrier or
transverse tilting movement with respect to the
slide 23. The slide 23 is mounted for movement
base. In `order to so mount the member 2 the
along the top surface of another slide 24. The
upper surface of the base is formed with a longi
tudinally extending raceway 3, which is generally 45 slide 24 is mounted for longitudinal movement
`along the base I. The upper surface of base I
-V-shaped in section. The underside of member
is formed with trackways 25, which slidably sup
2 is also formed with a longitudinally extending
port the carriage 24 thereon for movement par
raceway 4 which is also V-shaped and which is
allel to raceway 3. Carriage 23 may be fixed in
positioned to face the raceway 3. Ball bearings
5 are disposed in the raceways 3 and 4 in spaced 50 any of its longitudinal positions by means of a
bolt 26 having a laterally offset head 2T which is
‘relation so that the member 2 may roll longi
received within a longitudinally extending angu
tudinally of the raceway 3 and may tilt trans
lar recess 28. The bolt 26 extends through the
versely thereof in either direction. Suitable
carriage 24 andthe threaded upper end thereof is
stops may be provided on the raceways to limit
the movement of the b-alls and to retain them in 55 threadably received within the threaded shank of
a thumb nut 29. By tightening the thumbnut it
` properly spaced relation.
will be seen that the adjacent surfaces of the
A workpiece 6, which is a screw-threaded ele
head 21 and recess 28 are pulled together so that
ment, is supported on the member 2 and is cen
the carriage 24 is ñxed in position.
tered thereon by means of a pair of facing cen
ters A‘Il andi.` The _centers 'I and 8 have facing 60 The carriage 23 is slidably mounted on the top
2,409,924
3
fi
surface of carriage 24 for movement toward and
then moved so that the face of a stop 5| mounted
,thereon abuts against the projection of the stop
56. The stop 59 is held in adjusted position by a
clamp 5d which has a V-groove on the undersur
face thereof engageable with the top surface of
stop 59. The clamp 54 is mounted on the base |
from the axis of the workpiece, or in a direction
transverse to the direction of movement of car
riage 24. To somount the carriage 23 the upper
surfacerof carriage ‘24 is formed `with trackways
39 upon which the undersurface of carriage 23
slides. A recess 3 |, similar to recess 28, is formed
in the top surface of member 24 and receives the
offset head 32 of a screw 33 which- extends up
wardly through carriage 23 at an angle. A
thumb nut 34 is threaded to the threaded end of
screw 33, and the carriage 23 may lbe vadjusted’
along the length of recess 3| with respect to> car
riage 24.
The contact member I9, which is in the form of
an elongated rod, is mounted on the top? surface
of lcarriage 23 for pivotal movement about its end
by means of a screw 55.
The carriage 2 is then
positioned so that the thread is engaged by the
pointed end of contact I9. The rim of the dial
may lthen be turned so that the pointer is at zero.
If it is then desired to check the lead for a par
ticular length therealong a gage block 52 of that
- particular dimension is disposed betweenl the
faces of stops 50 and 5| with such faces engaging
the opposite ends of the gage block. The thread
is then brought into engagement with Contact |9,
Aand any variation in the lead will then be yindi
indicated at 35. Suchend 35 has a center recess
' cated by a deflection of the pointer | 9 which will
formed therein into which the pointed end of a
depress plunger 4| to move the pointer of the
centering screw is received. The centering screw 20, dial indicator itil.
'
36 may be threaded into a tapped opening in an
Formal changes may be made inthe specific
upwardly projecting end 31 of the carriage A23.
>embodiment of the invention described without
The Contact member I9 is supported above the
departing from the-invention, lthe scope of which
top surface of the carriage 23 by means of a sup
is commensurate with the‘appended claims.
porting member 38 which is slidably received on
What is claimed is:
the top surface of carriage 23. The member 38
l. A device for measuring and checking
>may be moved along the contact I9 to its proper
threaded workpieces comprising a base, a work
position and may be fixed in position by means of
piece supporting member, center mounting mem
a setscrew which extends through the top thereof
bers on said supporting member and adapted to
and engages the contact |9. The lateral move 30 mount a centered workpiece therebetween, means
ment of the contact I9 is limited by upwardly
mounting said supporting member on said base
projecting stop pins’ßû and 6 |V which are mounted
for movement along and tilting movement trans
on the top surface of slide 23 adjacent the pointed
versely to the longitudinal axis of said workpiece,
said last-named means including facing race
end of contact I9.
A conventional dial indicator iiD, having the
conventional plunger 4|, is mounted on carriage
lways formed on-said supporting> member and
said base with ball members interposed there
23 by means of a rigid bracket 42. On end of the
between, thread contact means mounted on said '
bracket 42 is fixed ,to the carriage 23, and the
base and positioned to engage the thread of the
opposite end is ñxed to a depending lugllíi which
workpiece, said contact means including an ele
may be fixed to the dial indicator casing. As 40 ment having an end positioned to engage said
mentioned, the dial indicator 'lill is of conventional
.'thread, means movably mounting said element,
construction and has the conventional pointer
and indicator means mounted on said base actu
which is actuated through a spring ratchet by
ated lby movement of said element.
the Aplunger 4 |.
2. A device `for measuring and checking
The plunger M'bears against the adjacent side
threaded workpieces comprising a base, a work
of contact I 9. Contact I9 is resiliently urged into
piece supporting member, center mounting'mem
contact with Vthe plunger 4| by means of a coil
bers on said supporting member and adapted to
spring 45. One end of `the coil spring 45 iscon
mount a centered workpiece therebetween, »means
nected toa pin 46 which in turn is fixed to the
mounting said supporting member on saidbase
projection 3l; andthe opposite end of the spring
for movement along and tilting movement‘trans
'115 is ‘fixed to a pin 41 which is ñxed to the collar
versely to the longitudinal axis of said workpiece,
3.8.
a pair of oppositely disposed thread contact mem
To check the drunkenness of the thread of a
bers mounted on said base and positioned to en
workpiece B, the device is set up so> that contacts
gage the'thread of the workpiece, means movably
i8 and I9 engage in the thread on opposite sides
mounting one of said contactmembers, and indi
thereof. The base | is preferably _tilted by plac
cator means _mounted on said base and actuated“
ing ,a shim under the right~hand end `(viewing
`by movement of said one of said contact members.
Fig.' 2) , so that the carriage or supporting member
3. »A ,device for Y -measuring and checking
2 .tendsto roll 'toward the lef-t. This insures the
threads will bear against the points at all times 60 threaded workpieces comprising a base, a work
piece supporting member, center mounting mem
during the operation. By then rotating the work
bers on saidsupporting member and adapted to
piece 5 so that the carriage 2 runs along its race
kmou-nt a centered workpiece therebetween, means
ways any deviation in the thread from the true
mounting said supporting member on said base
helix will .eiîect a lateral displacement of contactfor movement along andV tiltingmovement trans
i9. The deflection of contact "I9 will cause
versely -to- the longitudinal axis of said workpiece,
plunger ¿il to move and indicate >the extent of
said last-named means including facing race
deflection on the dial indicator 49.
. To check the lead of the thread, the contact it
`is removed and the workpiece is positioned
.against .contact |19 .so that itleans thereagainst.
.A stop 5|] in _the form .of a`bar of the same diame
ter as _the balls V5is .mounted in the trackway .3
for adjustment therealong adjacent one end of
theraceway .3. .'I'he stopy 5D,_has a diametric pro
‘jection 53 along one end, and the carriage'2 is 75
ways formedy on said supporting member and said
base with ballfmembersinterposed therebetween,
a pair of oppositely disposed threadcontact mem
bers mounted on said base and positioned to en
gage the thread of the workpiece, means movably
mounting one of said contact members, ,and in
dicator means ,mounted on said base and actuated
by movement of said one of said contact‘members.
'
RUSSELL E. BAUER.
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