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Патент USA US3044541

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Juiy 17, 1962
Filed Feb. 16, 1955
3.7 g. j
I 9.4
w .
United States Patent
Patented July 17, 19452
Another object of my invention is to provide a yoke
lh'ank R. Wilson, Memphis, Tenn., assignor to
of the post and crossbar type in which one of the posts
is mounted for swiveling movement with a swing-clamp
Quinn Esther Wilson
Filed Feb. 16, 1955, Ser. No. 488,458
7 Claims. (Cl. 153—81)
' and a gauging stop mounted thereon so that the move
ment of the stop to and from gauging position will be
determined by the position of the clamp.
Another object of my invention is to provide means for
This invention relates to a tube ?aring tool and, more
adjusting the height of the stop on the post so as to en
particularly, to a hand operated tool adapted to provide
able the same stop to serve as a gauge for either single
accurately dimensioned single or double ?ares on the ends 10 or double ?ares.
of tubes of varying sizes.
Another object of my invention is to provide a post and
The tube ?aring tool forming the subject of the present
crossbar type of yoke wherein the strap is supported on
invention contains a number of novel features not here
the posts for transverse movement so as to allow the ?ar
tofore known to the art and which greatly facilitate the
ing cone to align itself with the axis of a tube held in the
use of the tool in forming correctly dimensioned ?ares on 15 clamping means of the ?aring tool.
the various sizes of tubing adapted to be handled by the
Another object of my invention is to provide a tube
tool. For example, I have provided in this tool a novel
?aring tool having a post and crossbar type of yoke
in which the posts are loosely connected to the clamping
. arrangement of the yoke and clamping members which
has many advantages over the conventional form of ?ar
members so as to permitself-aligning of the cone with a
ing tool yoke and die blocks which will be readily un 20 tube held in the clamping members.
derstood as the description proceeds. As hereinafter
Another object of my invention is to provide an ec
shown and described, this arrangement includes a post
centric adjustment for the hinged links connecting the
and crossbar type of yoke which is attached to a pair of
clamping members so as to enable wear on the pivots of
hinged clamping members so as to permit a swing-clamp
the links to be taken up.
to be secured to one post while one end of each of the 25
Another object of my invention is to provide a novel
hinged links for the clamping members is connected to the
type of double-forming die of simpli?ed construction.
other post. The post which carries the swing-clamp is
With these and other objects in view which will become
also provided with a gauge or stop which is adapted to
apparent from the following ‘description, the invention in
be swung into and out of gauging position over the clamp
cludes certain novel features of construction and com
ing aperture as the swing-clamp is swung from clamping
binations of parts the essential elements of which are set
position to unclamping position, and vice versa. The stop
forth in the appended claims and a preferred form or em
is mounted on the post so that it may be set to one posi
bodiment of which will hereinafter be described with ref
tion for gauging single ?ares and to another position for
gauging double ?ares. The clamping members are adapt
erence to the drawings which accompany and form a part
of this speci?cation.
ed to receive different sizes of tubing by means of die 35
inserts of various sizes which may be placed in the clamp
ing members and retained therein by suitable fastening
In the drawings:
FIG. _1 is a side elevation of a tube ?aring tool con
structed in accordance with the teachings of my inven
To insure accurate alignment of the axis of the ?aring
FIG. 2 is a cross-sectional view taken along the line
cone with the axis of the tube held in the clamping mem 40 2—2 in FIG. 1.
bers, the strap or crossbar of the yoke is provided with
FIG. 3 is a view similar to that shown in FIG. 2 but
oversize holes for receiving the upper ends/0f the posts
with the clamping members swung open and with the diev
so as to allow the cone to adjust its position in the trans
verse direction in accordance with the position of the tube
as the cone is forcedgtherein so as to insure proper align
ment of the cone with the tube. Likewise, the means by
which the posts are attached to the clamping members is
such as to allow for tilting or rocking of the posts on the
clamping members so as to provide additional freedom of
movement of the cone in a transverse direction.
Double ?ares may be produced by the tool through the
use of a novel form of double-?are die which ?ts over the
?aring cone and provides a pressure face for engaging the
end of the tube for expanding the same as the cone is
forced into the tube. The tip of the cone is adapted
to project through an aperture in the die and act as an
abutment to prevent inward movement of the end of the
inserts removed therefrom.
FIG. 4 is a cross-sectional elevation taken along the
1 line 4~'—4 in 'FIG. 2.
one of
5 is an enlarged cross-sectional view taken through
the double-?aring dies.
6 is a perspective view of one of the die inserts.
7 is a fragmentary cross-sectional view showing
one of the retaining ‘clips for holding the die inserts in
FIG. 8 is a fragmentary view showing the stop for
gauging the height of the tube for single ?ares.
FIG. 9 is a perspective view of a double-?are die plate
- containing a plurality of die faces of different sizes.
The tube ?aring tool herein shown consists generally of
a clamping means 10 for holding the tube 11 which is to
tube as it is expanded by the die. The novel double
be ?ared, a ?aring cone 12 for spreading the end of the
?are die shown herein may be made either with a single
tube ‘to form a ?are of the desired shape and size thereon,
pressure face, as shown, or with a multiple pressure face 60 a feeding means 13 for advancing the cone into the tube
as shown and described in my co-pending patent applica
and for removing it therefrom, and a yoke 14 for support
tion Serial No. 338,303, ?led February 24, 1953, for Flar
ing the feeding means and ?aring cone above the end of
ing Tool, now Patent No. 2,852,839.
the tube to be ?ared. Giving detailed’ consideration ?rst
Accordingly, it is an object of my invention to pro
to the clamping means 10, it will be seen from FIG. 2
vide an improved tube ?aring tool which is capable of 6. that this means consists essentially of a pair of bar-type
forming accurately dimensioned ?ares of either a single
clamping members 16 and 17 which are hingedly con
or double character on tubing of various sizes.
nected with one another by a pair of links -18 and 19
Another object of my invention is to provide a tube ?ar
(FIGS. 1 and 4) to permit the members to be swung from
ing tool in which a pair of hinged clamping members are
their closed positions shown in FIG. 2 to their open posi
fastened to opposite legs of a yoke, and a swing-clamp 70 tions shown in FIG. 3. The clamping bars or members
is mounted to pivot about one of the legs for movement
16 'and 17 (FIG. 2) are each provided with a recess 20
to and- from clamping position. '
and 21, respectively, for receiving die inserts 67 and 66
by means of which the clamping means may be adapted to
receive different sizes of tubing. After the tube to be
?ared has been inserted in the clamping apertures pro
vided by the inserts 22 and 23, and the clamping members
16 and 17 have been closed as shown in FIG. 2, the clamp
ing members may be drawn tightly against the tube by a
clamping device including a swing-bolt 25 which is re
centric 57 is provided on its upper end with a screw driver
slot 58 (FIG. 2) and is held in adjusted position by means
of a set screw 59 which screws into a threaded hole in
the member 16 and presses against the side of the bushing
The screw 55 is provided with threads 60 on its lower
end which engage with threads in a tapped hole pro
vided in the bottom link 19. Hence, when the screw 55
is tightened as shown in FIG. 4, a shoulder 61 on (the bot
on the member by means of a wing-nut 27. The swing 10 tom of the shank 56 will be drawn tightly against the up—
ceivable within a notch 26 (FIG. 3) provided in the distal
end of the member 17 and which may be tightened down
bolt 25 is fast on the lower end of a swivel post 30 which,
together with a similar post 31 (FIG. 1) provides sup
port for a strap or cross-bar 32 of the yoke 14.
The ?aring cone 12 is swiveled on the ‘lower end of a
threaded spindle 33 which runs in a threaded nut 34 se~
per face of the link 19 and secure the screw to the link.
Hence, the links 18 and 19 will move as a unit with the
screw' 55 and the shank 56 of the screw will rotate within
the ‘bore formed in the eccentric 57 to thereby form a piv
ot for the links in the clamping member :16. Any wear
is occurring
between the shank of the screw and the eccen
cured to the strap 32 so that rotation of the spindle by a
trio 57, and any wear occurring between the bushing 46
handle 35' attached thereto will cause feeding movement
and apertures in the links 18‘ and 19 may be taken up by
of the cone 12 toward or away from the end of the tube
adjustment of the eccentric 57.
11 as the handle is turned in one direction or the other.
As shown in FIG. 2, the links 18 and 19 do not lie
As seen in FIG. 1, the posts 39 and 31 are provided at 20
exactly at right angles to the sides of the clamping mem
their upper ends with threaded tenons 37 and 38 which
bers when they are closed upon a tube held in the
pass through oversize holes 39 and 40, respectively, in the
clamping aperture but are canted slightly with respect
to the perpendicular which, in FIG. 2, is indicated by
so as to permit self-alignment of the ?aring cone with the 25 the dot and dash line x--x, The inclination of the pivots
of the links is such that the swinging member 17 of the
tube 11. The crossbar 32 is retained on :the posts by
clamping means is pivoted at a point slightly forward
means of self-locking nuts 41 and 42 which hold the cross
or closer to'the aperture than the pivot for the links on
bar against substantial movement in the direction of the
the member 16. This will enable the swinging member
longitudinal axis of the posts while permitting it to move
30 17 to move slightly rearward as shown in FIG. 3, when
freely in ‘the transverse direction.
it is moved to its open position so that the heel 65 of
For this same purpose, freedom may also be provided
tube clamping insert 66 will be permitted to move away’
on the lower ends of the posts ‘at their point of attach
crossbar 32 thereby providing opportunity for sidewise
or transverse movement of the crossbar 32 on the posts
ment to the clamping members. The means whereby
this is accomplished may be similar to the method used in
from the tube as the member 17 is swung open.
The insert 66 and its companion insert 67 are receiv—
pass through the clamping members so that a slight amount
ing the clamping means to tubing of different sizes. As
best shown in FIG. 1, each of the clamping members is
provided with a pair of retaining lugs 70 located at the
the case of the crossbar 32, that is, by providing oversize 35 able within the recesses 20 and 21 formed in the clamp
ing members 16 and 17 for the purpose of accommodat
holes for receiving the lower ends of the posts where they
of sidewise movement is allowed the post as well as ‘a cer
tain amount of tilting or rocking of the posts about their
40 bottom of the recesses and on opposite sides thereof.
point of attachment to the clamping members. In FIG.
These are adapted to mate with grooves 71 ('FIG. 6)
4 of the drawings is shown the method used in the case of
formed on opposite edges of the inserts 66 and 67 so
the post 31 which, as ‘here shown, is provided on its lower
that when the inserts are slid into the recesses 20 and
end with a journal 45 which is received in van oversize hole
21, the grooves 71 will move behind the lugs 70 and
provided in a bushing 46 which ?ts snugly into a bore
inserts within the recesses. Each insert is
provided in the clamping member 17. The ends of the 45 adaptedthe
to be held against upward movement out of its
bushing project beyond the faces of the member 17 to
associated recess by means of spring clip 72 (FIG. 7)
form trunnions for ‘one end of each of the links 18 and
secured to the upper face of its related clamping member
19. The post 31 is retained within the bushing by a nut
16 or 17. Each insert is provided at its upper end with
47 which is screwed on a threaded tenon 48 formed on
a ?ange 73 which is adapted to seat on the upper face of
the lower end of the post. The nut 47 is not drawn up 50 its associated clamping member when the insert is in
tightly against the bushing so as to allow clearance be
place. The upper faces of the ?anges 73 are preferably
tween the nut and the bushing as well as between a shoul
countersunk as indicated by reference numeral 74 in
der 49 on the post and the upper end of the bushing. The
- FIG. 7 so that the ?ange of the insert will snap beneath
post will thereby be permitted to partake of transiatory
the clip 72 and be held against lateral as well as vertical
’movement in a direction normal to its longitudinal axis as 55 movement within the recess. Each insert is also pro
well as rocking movement about its point of support on
vided with a chamfer 75 for supporting the outside wall
the clamping member which, in this case, is provided by
of the tube 11 as it is ?ared outwardly by the cone 12.
Double ?ares may be formed with my improved type
vshoulder 49.
A similar form of construction may be used in ‘the case,
of tube ?aring tool by the use of a novel type of double
of the post 30, although the bushing may be omitted in 60 ?are die which is adapted to fit over the cone 12 of the
this ‘case if desired. As previously mentioned, the clamp
?aring tool. As best shown in FIG. 5, the double-?are
bolt 25 is secured to the post 30 and is accommodated in
die may be constructed in the form of a plate or washer
a slot 50 (FIG. 1) providedin the end of the clamping
.80 having an aperture which is provided witha conical
.member '16 so as topermit the bolt to be swung outwardly
surface 81 on one side of the plate or washer and with
to the unclamped position shown in FIG. 3. The post 65 an annular concavity 82 on the other side thereof. The
‘30 is attached to the clamping member 16 by a nut 52
conical surface 81 is complementary to the cone-shaped
‘screwed onto a threaded tenon 53 formed on the bottom I face of the‘?aring cone 12 so that the die 80 will seat
snugly on the cone as illustrated in FIG. 5. The die
of the post 30.
The pivot links '18 and 19 for the clamping members
may be held in this position on the ‘cone bymeans of a
are pivotally attached (to the clamping member 16 by 70 plurality of spring clips 83 which are adapted to snap
over the upper edge of the cone and hold the die in place
means of a screw 55 (FIG. 4), the shank 56 of which
thereon. The dies 80 are made in different sizes for the
passes through antlaiperture provided therefor in the up
different sizm of tubes to be ?ared by the tool and, as
per link 18. The main body of the shank 56 is journaled
shown in FIG. 5, the size of the aperture in the die
in a bore provided in an eccentric vbushing 57 which is
journaled in a bore provided in the member 16. The ec 75 should be approximately the same dimension as the inside
diameter of the tube'11 so that the tube will contact the
pressure face 82 of the die at the point ‘where it inter~
sects with the aperture in the die. Under these condi
tions, the tip portion of the ?aring cone 12 projecting
beyond the aperture in the die will serve as a stop for the
end of the tube 11 and prevent it from moving inwardly
bers. When the clamping bolt 25 is swung to its un
clamping position as shown in FIG. 3, the stop 90 will
be moved over the clamping aperture and will serve to
stop the tube as it is moved upwardly into position in
the aperture formed by the die inserts. After the tube
has been stopped by contact with the ?nger 90, the clamp
as the end of the tube is expanded upon downward move
bolt 25 may be swung to its clamping position after which
ment of the cone and die. After the tube has been ex
the thumb nut 27 may be tightened to securely clamp
panded by use of the double-?are die 80, the ?aring cone
the tube within the aperture preparatory to a tube ?ar
may be backed off and the die removed whereupon the 10 ing operation. With the movement of the clamp bolt
cone may again be fed downwardly into the end of the
to its clamping position, the ?nger 90 will be moved to
tube to fold the ?ange formed on the tube ‘inwardly and
the FIG. 2 position where it liesto one side of the tube
complete the double-thickness ?are 0n the end of the
and ?aring cone.
The operation of my tube ?aring tool is as follows:
In FIG. 9 of the drawings is shown a modi?ed form 15 The tool is made ready for ?aring a given size of
of the double-?are die just described, the die plate 85 in
FIG. 9 being of an elongated shape so as to accommodate
a plurality of double-?aring dies of di?erent sizes to cor
tubing by opening the clamping members and removing
the die inserts 66 and 67 from the recesses 2%) and 21
after which die inserts of a size corresponding to the tub~
ing to be ?ared are inserted in the recesses. The inserts
respond with the sizes of tubing handled by the tube
?aring tool. As shown in FIG. 9, each die consists of 20 are placed in the recesses by sliding them downwardly
an aperture formed in the plate with a conical surface
86 formed about the aperture on the upper side of the
plate, and an annular concavity 87 surrounding the aper
therein so that the recesses 71 in the inserts engage be
hind the lugs 70 after which the ?anges 73 are snapped
beneath the clips 72. The tube gauge is then adjusted
ture on the bottom side of the plate. To conserve space,
to the proper position by pressing in on the thumb screw
the conical faces 86 intersect one another as illustrated 25 93 and turning the plunger until the square head 91 is
in FIG. 9 so that the dies may be placed closer together
properly positioned after which the thumb screw is re
on the plate. This arrangement will not interfere with
the proper seating of the die plate on the conical face of
the ?aring cone. .
I have provided my improved form of tube ?aring tool
leased and the head permitted to seat in the ?attened or.
shouldered recess provided therefor on the post 30. The
tube is now inserted in the clamping aperture and the
clamping membersare moved together to guide the tube
as it is pressed upwardly against the stop 90. Still hold
ing the clamping members together, the user of the tool
now swings the clamp bolt 25 to its clamping position
thereby removing the stop 90 from over the end of the
when it is pushed upwardly into the clamping aperture 35 tube and moving the bolt into the notch 26 provided
provided by the inserts 66 and 67. As shown in the
therefor in the end of the clamping member 17. The
drawings, this ?nger, or stop 90 is mounted on a square
wing nut 27 is now tightened to secure the tube within
head 91 provided on the end of a plunger 92 which is
the clamping aperture. If a double ?are is to be formed
slidably received within a transverse bore provided in
on the end of the tube, a double-?are die 80 (FIG. 5)
the post 39. At its opposite end, the plunger is provided 40 of the proper size is clipped onto the ?aring cone 12, or
with a gauge for assisting the user of the tool in inserting
the correct length of tubing in the tool to form an accu
rately dimensioned ?are thereon. For this purpose I have
provided a ?nger 90 which serves as a stop for the tube
with a thumb screw 93 which is biased outwardly by a
the alternate form of double-?are die 85 shown in FIG. 9
is utilized to effect the desired expansion of the upper
end of the tube in the manner heretofore described.
30. The post is ?atted on one side to provide a recess
After the tube has been expanded by the double-?are
having top and bottom shoulders 95 (FIG. 8) for hold
die, the cone is backed off and the die removed where
ing the plunger against rotation in any one of four posi 45 upon the cone is again fed into the end of the tube to
tions to which it may be moved by pressing in on the
fold in the expanded port-ion of the tube and produce a
thumb screw to compress the spring 94 and thereafter
double ?are of the correct dimensions on the end- of the
rotating the thumb screw to bring the stop 90 to the posi
tion desired. When the stop 99 is in its lowermost posi
In these operations, the cone 12 is able to line itself
tion, as indicated in FIG. 8 of the drawings, it will lie 50 up accurately with the longitudinal axis of the tube 11
only slightly above the tops of the die inserts and will
by reason of the lateral movement permitted the cross
limit the insertion of the tube 11 to the proper extent to
bar 32 by the ‘oversize holes 39 and 40 provided therein.
provide a single ?are of correct dimensions. When the
The freedom of movement provided on the lower ends
plunger 92 is turned 90° clockwise from the position
of the posts 30 and 31 will permit slight rocking move
shown in FIG. 8, the stop will lie at the proper height 55 ment of the posts and thereby further assist the ?aring
above the tops of the inserts to provide for a double
cone to align itself with the axis of the tube 11. After
?are of proper dimensions on the smallest size of tubing.
the tube has been ?ared, the wing nut 27 may be released
Rotation of the plunger 92 through another 90° clock
and the swing bolt 25 swung to the FIG. 3 position to
wise will bring the stop ?nger 9t'i to its highest position
permit the ?ared tube to be removed from the tool and
above the tops of the inserts where it will serve to cor 60 an un?ared piece of tubing to be inserted therein.
rectly gauge the largest sizes of tubing for the formation
While I have described my invention in connection with
of double ?ares thereon. Rotation of the stop 99 through
one possible form or embodiment thereof and have used,
another 90° clockwise will bring the ?nger to an inter
therefore, certain speci?c terms and language herein it
mediate position where it will gauge the insertion of inter
mediate sizes of tubing for the formation vof double 65 is to be understood that the present disclosure is illus
trative rather than restrictive and that changes and modi
?ares thereon.
?cations may be resorted to without departing from the
Inasmuch as the plunger 99 is carried by the post
spirit or scope of the claims which follow.
30, it will partake of the rocking movements of the
Having thus described my invention, what I claim as
post as the swing-bolt 25 is rocked from clamping posi
tion to unclamping position and vice versa. As shown 70 new and useful and desire to secure by United States
compression spring 94 coiled around the plunger beneath
the thumb screw and bearing against the side of the post
in FIG. 2, when the clamp bolt 25 is in clamping posi
Letters Patent, is:
1. A tube ?aring tool comprising a pair of clamping
tion, the stop 99 will lie to one side of the tube clamping
aperture formed in the clamping members 16 and 17
members having recesses therein to form a tube clamp
and so will not interfere with the operation of the ?aring
ing aperture, a two-legged yoke fastened to said mem
cone on the end of the tube held in the clamping mem 75 bers, one leg of said yoke being fastened to one of said
spades 1
clamping bars having opposite’ meeting faces with recesses
members only and the other leg of said yoke being
therein to form a tube clamping aperture, said opposed
faces ‘abutting when a tube is clamped in'said formed
aperture and means for hingedly connecting said bars
together at one side of said aperture to permit separation
of. the members at the other side of said aperture and
separation of the recesses therein to free the tube within
the aperture, said means including a link lying at said
one side of said aperture, said link being pivotally con
fastened to the other of said members only, and means
for hingedly connecting said members at one side of said
aperture to permit separation thereof to free the tube
within the aperture, said means including a link pivotally
connected at one end to one of said members and at the
other end to the other of said members to provide a
swinging link connection between said members, one
of the legs of said yoke forming the pivot for one end of
10 nected at one end to one of said members and at the
said link.
other end to the other of said members to provide a
2. The ?aring tool of claim 1 wherein the other leg
swinging link connection between said members at said
of said yoke is mounted to swivel on its associated mem
one side of said aperture, the distance from the central
ber, and said tool includes a clamp fast on said other
axis of the recess of said one member to the pivot for said
leg for rocking movement into and out of engagement
link therein being greater than the distance from the cen
with the companion member to enable said members to
tral axis of the recess in said other member to the pivot
be drawn together on and to clamp the tube to be ?ared.
for said link therein to permit free movement of said
3. The ?aring tool of claim 2 including a stop ?nger
members away from the tube.
projecting laterally from said other leg for rocking
movement into and out of gauging position over the
References Cited in the ?le of this patent
recess in response to rocking movement of said clamp
out of engagement with the companion member or into
engagement therewith, respectively.
4. A tube ?aring tool comprisinga pair of separable
clamping members each having a ‘recess therein for form
ing a tube clamping aperture when the members are
closed, a yoke fastened to said members with one of
its legs mounted to swivel on one of said members, a
clamp secured to said leg for rocking movement from
a clamping position in which it may be tightened to
draw said members together to grip the tube tightly 30
within the clamping aperture, to a releasing position in
which the members may be separated to permit removal
of the tube, and a stop secured to said‘ leg for conjoint
Gravelius ___________ __ July 13,
Harrell _____________ __ May 17,
Backstrom ___________ __ May 8,
Vernet ______________ __ Aug. 27,
‘iBrocket-t ____________ __ Mar. 29,
Lewis __.'_ ____________ .. Aug. 11,
Kane _______________ __ Feb. 27,
Mueller et val. ________ __ July 5,
Mueller ______ __; ____ __ Oct. 30, 1923
Nixon _________ __'..____ Jan. 22, 1924
, the tube may be inserted in the aperture, said stop being
movable by said conjoint movement to a gauging posi~
tion over the aperture when said clamp is moved to its
releasing position, and to a position away ‘from the aper
ture when said clamp is moved to its clamping position.
5. A tube ?aring tool comprising a tube clamping 40
means having an aperture for receiving and holding the
tube to 'be ?ared, and movable means for gauging the
length of tube inserted in said aperture in acmrdance
with the size of the tube, said movable means including
a post rotatably mounted on said clamping means for
rotation about an axis parallel to‘ the axis of said aper
ture, a plunger iournaled on said post for rotation about
an axis transverse‘ to the axis of said post, and a stop
eccentrioally mounted on said plunger and extending over
said aperture for contacting the end of the‘tube as it is’. so
inserted in said aperture; when said post is rotated to
. 1,539,943
movement therewith and for gauging the extent to which 7
gauging position about its axis, said post and plunger
having positive means for holding, the plunger against
rotation in any ofthe-eccentric positions of said stop.
6. The tube ?aring tool of claim 5 in, which said posi
G-reve ______________ __ June 2, 1925
Wilson ___'___~ ________ __ Mar. 2,
Davies ______________ __ June 11,
Schultis _____________ __ June 24,
Baas'h ______________ __ Mar. 7,
' 1,921,281
Carlson _____________ __ Aug. 8, 1933
Holsclaw ____________ __ Apr. 24, 1934
Maurer _____________ __ Aug. 7, 1934
Stecher ______________ __ Jan. 1, 1935
Swyers ______ __‘ ______ __ Feb. 20, 1945
Hayman ____________ __ Aug. 19, 1947
Ti-pton ____ __~ ________ .._ Dec. 23, 1947
Franck _____________ __ Apr. 25, 1950
2,537,254 '
Edel-mann ___________ __ Oct. 27, 1950
Blythe ______________ __ Jan. 9, 1951
2,543,480 ‘
V-aill __' _____________ __ Feb. 27, 1951
Wolcott ____' _______ __'__ Apr. 29, 1952
DeVoss _____________ __ Dec. 2, 1952
Brinkley ____________ __ May 18, 1954
Wilson ______________ __ June 28, 1955
Wilson _______ __V'____._.__ June 28, 1955
Willrich _____________ __ July 2, 1957
Great Britain _________ _. July 22, 1898
tive holding means comprises a head on said plungerj
cooperating with a shoulder on said post for locating said
plunger in certain preselected rotational positions on said
Great Britain _________ __ June 21, 1945
'Great Britain ________ -2 Sept. 10, 1952
‘7. Tube clamping means comprising a pair of parallel
Germany __e _______ _l___ 'Jan. 13,
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