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Патент USA US2405750

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_Aug.13, 1946.
Filed Aug. 17, 1943
$2,405,750 '
8 ‘Sheets-Sheet 1
6/01/7155‘ E. ‘A MP4 6/;
Aug, 13, 1946,,
c. E.’ LAMPE, SR
' 2,405,759
' Filed Aug, 17,-1945
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Patented Aug. 13, 1946
Charles E. Lampe, Sn, Philadelphia, Pa, assign
or, by direct and mesne assignments, of four
tenths to Charles Lovejoy, and one-tenth to
Henry M. Kannee, Washington, D. 0.
Application August 17, 1943, Serial No. 498,949
7 Claims.
((31. 15s_40)
My invention relates to new and useful im
provements in hollow pipe bending machines, the
primary object of the invention being to provide
a machine of this character which is capable of
bending pipe of varied diameters made of any
kind of metal or alloy in a reasonable short pe
riod of time.
A further object of the invention resides in
pipe completely bent on a forming wheel of great
er radius than that shown in Figure 1, with the
motor and drive shaft for the spinner mandrel
positioned accordingly,
Figure 5 is an enlarged fragmentary plan view
of the forming wheel showing a pipe clamped in
position and about to be bent on said wheel,
Figure 6 is a fragmentary top plan view show
the provision of means for bending hollow pipe
ing the forming wheel, the sliding form or shoe
the thickness of metal.
A further object of the invention resides in pro;
pipe clampingmeans and its relation to the form
to desired angles so that the resultant bends are 10 and the vise structure cooperating with the latter,
Figure 7 is a detailed vertical section in frag
smooth, round in cross section, devoid of crimps
ment, showing particularly the structure of the
or wrinkles and without appreciable reduction in
ing wheel,
Figure 8 is a similar view with elements of the
viding a machine of the character mentioned in
clamp separated,
which the pipe is caused to be bent around a
Figure 9 is an end elevation of the machine,
rotating forming wheel in cooperation with a mov
with parts broken away and parts in section,
ing or slidable form with a rotating spinner man
showing particularly the relationship of the vise
drel utilized within the pipe, said forming wheel
and spinner mandrel also acting as means tend 20 to the sliding form and the pipe clamping means
to the forming wheel,
ing to release the pipe When the bending opera
Figure 10 is a vertical transverse section through
tion is completed.
the machine showing the detailed structure of the
A further object of the invention resides in
Vise and the relation between the same and the
providing an improved forming means in a pipe
25 sliding form,
bending machine.
Another object of the invention resides in pro
viding an improved clamping means for retain
ing the end of the pipe to the forming wheel.
Still another object of the invention resides in
the provision of an improved vise coacting with
the sliding form or shoe for retaining the pipe
in proper relation at all times to the forming
' Figure 11 is a vertical transverse section. as
shown on the line ll—ll of Figure 10, looking
in the direction of‘the arrows,
, ,
Figure 12 is a similar view as seen on the line
l2--I 2 of Figure 10, looking in the direction of the
Figure 13 is a similar view as seen along the
line lit-l3 of Figure 10, looking in the direction
Still another object of the invention resides in
providing means for readily adjusting and set
ting the motor and shaft for the spinner man
drel to accommodate forming Wheels and pipes
of varied radii and diameters, respectively. ~
of the arrows,
Figure 14 is a front elevation of the locking key
plate used in the vise,
Figure 15 is a vertical section therethrough as
seen on the line l5—l 5 of Figure 14,
Figure 16 is a fragmentary perspective view,
With these and numerous objects in view, my
invention consists in the novel features of con 40 partly in section, of the sliding form or shoe show
struction, combination and arrangement of parts
as will be hereinafter refered to and more par
ticularly pointed out in the speci?cation and
ing the rack bar thereon, and
Figure 17 is a detailed vertical section showing
the forming wheel removed from its driving shaft
and about to be applied thereto.
In the accompanying drawings, forming a part 45 In the bending of hollow pipe, particularly pipe
of large diameter, formed of certain hard metals,
of this application,
considerable di?iculty has been encountered com
Figure 1 is a top plan view of a pipe bending
mercially. A great length of time has been re
machine constructed in accordance with my in
quired to bend such pipe and in many instances
50 pipe formed of certain metals has been found im
Figure 2 is a side elevation thereof.
possible to bend. Moreover, when. andyif it were
Figure 3 is a fragmentary side elevation, with
possible to bend certain pipes, distortion occurred
parts broken away and parts in section, illustrat
at the bend thereof or crimping was notable.
ing particularly the driving mechanism connect
to correct the distortion or remove the
ed with the forming wheel,
Figure 4 is a top plan view, showing a hollow 55 crimping have caused reduction in the thickness
of metal at the bends. It is the purpose of my
invention, as aforementioned, to overcome these
many di?'iculties and provide a means for bending
pipe in a reasonably short period of time.
In describing my invention, I shall refer to
the drawings, in which similar reference char
shaft I I, the studs 2| ?tting in the openings 26
will obviously lock the wheel to the shaft for
rotation with the latter. The under face of the
disc-like central portion 25 is countersunk as
shown at 21 to permit the upper face of the ?ange
acters designate corresponding parts through
is applied to the shaft, as best shown in Figures
19 and l’? of the drawings. In order to further
20 of the collar II to ?t therein when the wheel '
out the several views, and in which the numeral
l designates a housing or casing for my machine,
the bed of which is designated by the numeral
2. Mounted within the housing or casing one.
' secure the forming wheel to the shaft H , a plate
base 3 is an air motor 4 which connects with a
. into the outer end of the shaft l I, as clearly shown
28 is applied to the outer end of the hub 24 and
a bolt 29 is projected therethrough and threaded
speed reducer 5. A bevel gear Sconnected with
the speed reducer meshes with a larger bevel gear
‘I mounted on the vertical shaft 8, the latter being
in‘ Figure 10.
The forming wheel 22 has a notch, recess or
cut-out portion 30 formed therein to provide for
mounted in bearings located at points in the
the clamping means to secure the end of the
pipe thereto, as will be hereinafter and more
chine respectively. Keyed to the lower portion
particularly set forth. There is secured to the
of shaft 8 is a spur gear 9 which in turn meshes
upper face of the wheel 22 at its periphery a
with a larger spur gear Ill carried at the lower 20 gear segment 33, the same being bolted in place
end of a second vertical or driven shaft H, as
on the wheel as shown at 32. The teeth of this
particularly illustrated in Figures 2 and 3 of the
segment 3| mesh with the teeth of a rack bar
drawings. This shaft H projects upwardly
33 secured to a sliding form 31;, the inner face
through the top of the machine and is adapted to
of which is concaved and conformed to the con
operate the forming wheel, as will be herein 25 cavity 23 in the periphery of the forming wheel.
after and more particularly set forth.
This sliding form constitutes a guide for the pipe
The upper portion of the shaft H is keyed to
which is being bent or the forming wheel 22.
a sleeve I2, the upper end- of-which is provided
The sliding form 34 is removably supported on a
with an outstanding annular ?ange l3. Sur
block or head 35 which is adiustably supported
rounding the sleeve lZ is a stationary collar or
30 in a manner hereinafter and more particularly
the like l4 and interposed between said collar
set forth.
I 4 and the sleeve I 2 is a wear sleeve or the like
The block 35 is, in fact, the head of a vise-like
IS, the upper end of which is also provided with
member, utilized to force‘ the sliding form 34
an outstanding annular ?ange l6 resting on the
toward the forming wheel so as to look a pipe
upper peripheral edge of the collar l4 so that 35 to be bent in tight engagement between said
the ?ange [3 also contacts therewith. A narrow
Wheel and sliding form. The outer face of the
collar I‘! surrounds the shaft below the elements
block or head 35 is channel shaped so as to re
I2, l4 and 55 to hold the latter in proper position
ceive and support therein the moving form 34.
on the shaft; said collar being secured in posi
A wear plate of L-shaped design designated in
tion by means of a transverse pin l8 projecting 40 the drawing by the numeral 36 is ?tted in the
therethrough and through said shaft I l, as par
block 35 against the inner and lower walls there
ticularly illustrated in Figure 9 of the drawings.
of, as clearly shown in Figure 10 of the drawings.
Upon the upper end of‘ this shaft H, as afore
The upper portion of the block 35 is arcuately
said, the forming wheel is adapted to'be-sup
ported. As previously indicated, the forming . formed and over-hangs the sliding form 34 so
as to provide a substantial support for the lat
wheel is the wheel about which the pipe is bent
ter as it moves with the forming wheel through
and wheels of various radii may be used but in
the medium of the intermeshing teeth 3| and 83.
each instance the forming wheelwill be of the
Thus, the pipe, which I have designated in the
bottom of the bed and on the base of the ma
same construction. -
In order to support a forming wheel on the
shaft H, I provide a supporting collar or the
like l‘la which is ?tted over; the upper end of
the shaft and provided with a lower annular
?ange l8a the latter being bolted, as'shown at
i9, to the ?ange [3 of the sleeve: 12, asclearly
shown in Figuresi), 10, and 17. The upper end
of the collar Ha has an annular ?ange 20 formed
thereon into whichis threadeda plurality of up
standing studs 2!.
These studs form a means
for engaging the forming wheel, as will be here
inafter and more particularly set forth.
The forming wheel is designated by the nu
meral 22, the periphery thereof, being concave
as shown at 23. This wheel 22 has a central hub
portion 24 of a diameter toreceive the upper
end of the shaft I l’ and a thick, disc-like central
drawings by the numeral 31, and whichis adapted
to be bent on the forming wheel 22, is supported
in position against the concave portion 23 of said
wheel by means of the moving form 34, as clearly
shown in Figures 3 and 4 of the drawings. This
pipe 37 is adapted to be drawn forwardly around
the forming wheel 22 and as said pipe is guided
and supported by the moving form 34 any tend
ency toward forcing of the pipe away from the
forming wheel will be counteracted by the action
of the moving form 34.
This moving form 31% is further supported by
portion or web 25 connecting'the hub portion 24
with the periphery of thev wheel. Thus, the form
ing wheel is in some respects similar to a pulley
wheel and the disc-like central web portion 25
, is provided witha' plurality of openings 26 which
are adapted to receive therein the studs 2| when
the wheel is applied to the upper end of the shaft
H . as shown in Figures 10 and 17 of the draw
ings. When the forming wheel is applied to the 75
a transverse roller 38 mounted in bearings 39 on
the bed of the machine, as clearly shown in Fig
ures l, 3 and 4 of the drawings.
As stated heretofore, the block or head 35 is
a portion of a vise-like device for adjustment of
said head or block to its effective position. Since
this'block is movable transversely of the bed of
the machine, I have provided a proper support
and operating means therefor. A supporting
plate 40 projects laterally from the bed of the
machine which has bolted thereto, as shown at
4|, the base plate 42. The upper face of said
plate 42 is provided with a pair of longitudinally
spaced apart grooves 43, the wallsof which are
beveled outwardly from their upper to their lower
edges. Bolted, as shown at M, to the lower face
of the block 35 are the spaced longitudinal ribs
45, the side edges of which are also beveled out
wardly from their upper to their lower edges, v_
coincident to the beveling of the walls of the '
the movable jaw 61. The lower arm of the L
shaped clamp 66 and the hinged jaw 61 are each
provided with a groove 68, which grooves are
adapted to be engaged with the ?anges 65 of the
block 63 and an insert block 69 is provided for
retention within the clamp 65 for abutment
against the outer face of the block 63. The in
sert block 59 has its face which is opposed to
grooves 43. These ribs 45 are ?tted into the
grooves 43, so that the block 35, while locked to
the base plate 42, may slide on the latter.
the block 63 concaved as shown at 1D to conform
A compound vise plate 46 is provided, the lower
face of which is provided with the ribs A’! which 10 to the concavity 64 of the block 63, whereby a pipe
may be secured therebetween. An adjusting
also ?t within the grooves 43 of the base plate
screw ‘H projecting through the vertical arm of
42, so that the vise plate 46 may slide on said base
the clamp 66 permits the insert block 69 to be
plate, as appears obvious.
secured against the pipe after the clamp has been
A rearwardly projecting extension at on the
block 35 is provided with a housing QB in which 15 properly engaged with the block 53. In Figure 8
of the drawings, I have shown the elements of
there is a slot 50 receiving the head 5! of adjust
this clamping means separated and in Figure '1’
ing screw 52;. This adjusting screw is extended
I have shown the elements secured in position
through a threaded opening 53 in ‘the vise
to retain the end of a pipe securely to the form
plate 46.
ing wheel. In Figure 4 I have shown the pipe 3'!
Supported on the plate 45 at its outer end and
abutting the outer end of the base plate 42 is the
end plate 54 secured in position to the end of the
plate 42 by means of the bolts 55. ‘This end plate
54 through the medium of a central opening
properly secured to the forming wheel through
the clamping means and'the bend completed.
As a guide to the operator of the machine to
illustrate the bend to be formed, a curved wire
therein supports the unthreaded end of a screw 25 ‘52 may be provided and secured by a screw 13 in
an upstanding projection ‘M on the hinged por
shaft 56, as clearly shown in Figures 6, l0 and 13
tion 61 of the clamp, as clearly shown in Figures
of the drawings. The outer end of said shaft 56
4 and '7 of the drawings. This wire is in full view
is provided with a handle 51 and the inner end.
of the operator of the machine and since it is of
thereof extends through a threadedopening 58
in the compound vise plate 45. Thus, it will be 30 predetermined length, according to the extent of
curve to be applied to the pipe, it will extend
seen that the vise plate at and the block or head
about the wheel for a predetermined portion of
35 may be moved or adjusted longitudinally on
its circumference when applied and secured by
the plate 42 by adjustment of the screw shaft 55*.
‘This would be a coarse adjustment and a ?nal
adjustment of the block or head 35 is made
the screw '53.
When the free end of the wire
reaches the outer end of the mounting member
or track 35, the operator will know that the pipe
through the medium of the adjusting screw 52.
The formation of the longitudinal grooves 43 in
plate 42 provide a substantially V-shaped central
rib 59’ and side ribs 59 on said plate. These side
‘has been bent as much as desired and cut off the
rality of transversely registering notches 59a. A
locking key plate 50 is provided which is adapted
ly bending pipe and eliminating crimping or the
like at the bend thereof. Naturally, an internal
means is provided to produce this result. This
A feature of my invention, as previously set
ribs 59 are cut away at intervals to provide a plu_ 40 forth, is the provision of means for rather quick
to be positioned in the transverse notches 59a so
that one face of said key plate abuts the rear face
of the compound vise block 45. This will retain
the vise block in its initial or coarse adjustment
heretofore referred to.
The locking key plate Bil is T-shaped in cross
internal means is a constantly rotating one and
it is speci?cally a spinner mandrel designated
in the drawings by dotted lines and the numeral
‘15. The detailed structure of this spinner man
drel is disclosed and described in my co-pend
ing application, Serial No. 465,626, ?led Novem
section, as shown in Figures 14 and 15 of the
drawings, to rest on the base plate t2 and ?t in the 50 ber 14, 1942, Patent No. 2,357,011, dated August
29, 1944. The mandrel consists generally of a
notches 59a. The central portion of the key plate
spinner body with a plurality of rollers mounted
is arcuately cut out as shown at 5! so as to permit
therein and a loose linked spinner head with a
the screw shaft 55 to extend therethrough. In
plurality of additional rollers mounted therein.
other words, the key plate ES straddles the screw
shaft 56, as best shown in Figure 10 of the draw 55 As the speci?c construction of this spinner man
drel is clearly shown in the aforesaid copending
ings. Through this medium of coarse and fine
application, I do not deem it necessary to illus
adjustment of the block or head 35, it is apparent
trate the same in detail nor to further describe
that the moving form 34 may be readily and se
curely adjusted to the proper position to support
the construction thereof.
The spinner mandrel is carried at the end of a
the pipe to be bent on the forming wheel.
drive shaft ‘it which projects from the electric
As aforesaid, the pipe is adapted to be bent
motor Tl supported on the frame 18. This frame
around the forming wheel 22 and I have provided
operates in guides '59 extending transversely of
a special locking means for securing the end of the
the bed of the machine at one end of the latter,
pipe to said wheel. The periphery of the wheel
22, as previously mentioned, has a notch, recess 65 as clearly shown in Figures 1 and 4 of the draw
ings. Movement of the'frame ‘l8 laterally on the
or cut-out portion therein as shown at 35 and
machine is accomplished by operation of the
by cutting away this portion of the wheel a thin
handle 8i} carried on a screw shaft 8! which
?at face 62 is provided to which is welded or
extends laterally of the machine and operates
otherwise similarly secured a block 63. The outer
face of this block is concaved as shown at 54 and 70 through a threaded collar or the like 82 on the
lower face of the frame 78. This structure is
the upper and lower edges of the block at the
only shown in dotted lines to diagrammatically
outer face thereof are provided with the projec~
illustrate the principle involved, as this is a con
tions or flanges 65.
ventional means for adjusting a frame on a
An L-shaped clamping member 56 is provided,
to the upper edge of which is hingedly engaged 75 machine.v
' 8
'The adjustment of the motor 1"! and corre
spondingly the drive shaft 15 becomes necessary
as forming wheels of different radii are used in
the bending of pipes of various diameters. I
plug, shown in Figure 5 of the dravn'ngs, is des
ignated by the numeral 85 and is provided cen
trally with an opening 86 through which may
be injected within the pipe a lubricant such as
have provided a scale‘ at the one end of the
heretofore referred to. The introduction of this
machine, as shown at 83, to cover the various
lubricant may be through the medium of a pres
radii of forming wheels to be used and at the
sure gun or the like and said lubricant will facili
one end of the frame 18, I provide a pointer 84,
tate the action of the spinner mandrel within
sothat by setting said pointer at the particular
the pipe. The plug, obviously, when inserted in
radius representing the radius of the forming 10 the end of the pipe will prevent the splashing
wheel to be used, the drive shaft 16 will be prop
or the dripping of the lubricant from said pipe
erly positioned with respect to the forming wheel
as it is being bent.
which may be applied to use. Of course, when
The pipe in this position is then adapted to
the motor and frame are positioned properly, any
be clamped and secured to the forming wheel.
conventional form of look may be used to secure 15 It is positioned between the block 63 of theform
the same in the properly adjusted position.
ing wheel and the clamp 66, the hinged element
Obviously, forming wheels of different radii
61 of the latter being secured in position after
are necessary according to the bends that are
the insert 69 has been applied. The screw ‘H
desired and also according to the size of pipe to
is turned home to secure the pipe between the
be bent. Under certain conditions, it is also ap
insert 69 and the block 63.
parent that the sliding form will also be changed
Then the motor ‘H is started to rotate the shaft
to correspond with the forming wheel in the
76 and the spinner mandrel 15. In Figure 9 of
bending of pipe of various diameters.
In setting up the machine for operation, the
the drawings I have shown starting and stopping
bent and applied to the drive shaft, whereupon
imately 45 revolutions per minute.
buttons for the motor which are connected with
following steps are taken: The proper size man 25 the latter in the conventional manner (not
drel is selected according to the size pipe to be
shown). The spinner mandrel rotates at approx
After the
said mandrel, driving motor and unit are set to
spinner mandrel has been started in operation,
conform to the radius of the forming wheel to
the forming wheel is caused to rotate by starting
be used. This is accomplished by turning the 30 the air motor 4. I have shown in Figure 9 the
hand wheel 80 which actuates the frame on
motor control lever 71a on the front of the ma
which the motor is supported and the same is
chine which is connected to the motor for oper
set by the indicator corresponding to the radius
ation of the latter in a conventional manner,
indicated on the graduated scale 83.
not shown. The proper operation of the level
The proper size forming wheel 22 is then 35 admits air to the air motor thereby transmitting
mounted upon the vertical shaft H so that the
its action through the speed reducer to the bevel
same engages the four studs 2! and the same is
gears 6 and 1, thence on to the spur gears 9 and I0
secured by applying the plate 28 and the screw
and finally to the vertical shaft ll bearing the
29 to the end of the shaft. The forming wheel
forming wheel 22.
is then checked so as to be in its proper start 40 As the forming wheel 22 starts its rotation, the
.ing position, as for instance, in the position
sliding form 34 also moves forward through the
shown in Figures 1 and 5 of the drawings. The
medium of the coaction between the gear seg
selection of the forming wheel 22 is, of course,
ment 3! on the forming wheel and the rack bar
contingent upon the size of pipe and radius of
33 on the sliding form. The forming wheel, turn
bend desired. When this is accomplished, the 45 ing slowly, also moves the sliding form therewith
proper sliding form 34 is inserted in the block
and the coaction between these two elements
35 of the vise-like member and, of course, the
tends to overcome the force which would exist
guide is properly lubricated so that the sliding
on the sliding form, due to the frictional load
form may operate freely.
exerted by the vise, were the gear and rack not
The pipe to be bent is then selected and the 50 used. Furthermore, the roundness of the pipe
internal walls thereof cleaned and coated with
while bending is preserved through this coaction
a lubricant of a special character. One form
between the sliding form and the forming wheel.
of lubricant usually recommended is composed
When the desired bend in the pipe is completed,
. of one-third white lead, one-third tallow and
the machine is stopped by ?rst stopping the air
one-third hypoid gear oil. The spinner mandrel 55 motor and then stopping the motor controlling
is also coated with this lubricant. Then the
the spinner mandrel.
pipe to be bent is positioned over the spinner
To remove the pipe from the spinnermandrel
mandrel '15 to the desired location where the
and the machine, the clamping means on the
bend in the pipe is to start. A preliminary
forming wheel is ?rst‘disconnected. This severs
tightening of the vise-like member is accom 60 all ties between the pipe and the forming wheel.
plished by turning the crank handle 51 in an
Then the electric motor is started to operate the
anti-clockwise direction which moves the block
spinner mandrel. Following this, the forming
35 toward the pipe and carries the sliding form
wheel 22 is started moving by operating the air
34 inwardly toward the forming wheel 22. Thus,
motor. Since the bending action has ceased
the pipe is ?rmly clamped between the forming 65 through the removal of the clamping means be
wheel and the sliding form and at the same time
tween the pipe and the forming wheel, the latter,
the gear segment of the forming wheel and the
in its operation, causes the sliding form to move
rack bar of the sliding form are placed in mesh.
forwardly. The pipe which is clamped between
Then the key plate 60 is inserted in the nearest
the forming wheel and the sliding form will,
transverse notches in the vise behind the com_. 70 therefore, be drawn forwardly over the spinner
pound vise block 46. A wrench is then applied
mandrel. This action is carried on until the rear
to the screw 52 carried in block 46 to securely
end of the sliding form 34 is even with the rear
retain the sliding form in position.
end of the vise block 35, provided the end of the
The next operation involves the application of
pipe does not extend beyond the rear end of the
a plug to the end of the pipe to be bent. This 75 sliding form. 'If the pipe is shorter than the rear
end of the sliding form, then the pipe removing
action is con?ned to the point where the end of
the pipe would be in line with the vise block 35.
The machine is then stopped, as previously de-_
scribed, the vise block 35 is loosened and the pipe
may then be readily removed from the machine.
After the pipe has been removed from the ma
4. In ‘a pipe bending machine, a rotatable
forming wheel, a sliding form movable at a tan-y
gent to the forming wheel and adapted to co
operate therewith, a support for slidably mount
ing said sliding form, a rack carried by said slid
ing form, a gear carried by said wheel and mesh
ing with said rack for sliding the slidable form
chine, the forming wheel may be brought back to ~ when the wheel is turned, a base plate, said sup
its initial or starting position by reversing the air
port being slidably mounted on said base plate
10 for radial movement with respect to said Wheel,
a vise plate slidably along said base plate, means
The operation of the machine for all sizes of
adjustably connecting said support with said vise
pipes and all radii or bends is the same. Obvi
plate and adapted to move the support along the
ously, a change is made in the size of the form
ing wheel according to the bend desired and cor
base plate relative to said vise plate, means for
respondingly a change is made in the sliding form
manually shifting said vise plate along the base
plate and correspondingly adjust said support
according to the size of pipe to be bent.
From the foregoing description, the construc
and the sliding form with respect to the rotating
tion and operation of my improved machine will
wheel, and means shiftable along said base plate
to positions for locking said vise plate in its ad
be readily understood and it will be seen that I
have provided a compartively simple, inexpensive 20 justed position with respect to said base plate.
and ef?cient means for carrying out the various
5. In a pipe bending machine, a rotatable
objects of the invention. While I have particu
forming wheel, a sliding form disposed opposite
larly described the elements best adapted to per
the periphery of the wheel in position to cooper
form the functions set forth, it is apparent that
ate therewith, a support slidably carrying said
various changes in form, proportion and in the 25 sliding form, a base plate, said support being
slidably mounted on said base plate for radial
minor details of construction, may be resorted to,
without departing from the spirit or sacri?cing
movement with respect to said forming wheel, a
vise plate slidably mounted on said base plate, an
What I claim is:
adjusting screw threaded through said vise plate
1. In a pipe bending machine, a forming wheel, 80 and swiveled to said support, and a threaded rod
the periphery of the latter being concaved to re~
rotatably mounted longitudinally of said base
ceive a pipe therein, a portion of said periphery
plate and threaded through the vise plate for
shifting the vise plate and said support along
being recessed, a block‘ carried in the recess of
'said periphery having the outer face thereof con
the base plate as a unit when turned.
caved, the upper and lower edges of said block 85 6.121 a pipe bending machine, a rotatable’
at the outer face thereof being provided with out
forming wheel, a sliding form adapted to coop
standing fianges, a clamping member comprising
erate therewith, a support for said sliding form,
a body portion and movable and stationary jaws,
a base plate, said support being slidably mounted
said jaws having grooves therein to receive the
on said base plate and movable thereon radially
flanges of said block, an insert block carried by 40 with respect to said forming wheel, a vise plate
said clamping member abutting the outer face of
slidably mounted on said base plate, means ad
the ?rst mentioned block and having a concaved
justably connecting said vise plate with said sup
face to cooperate with the concaved face ‘of the
port to move the latter upon movement of the
first mentioned block, and an adjusting screw
former on the base plate, said adjustable con
cooperating with the body portion of the clamp 45 necting means being capable of movementto ad
and said insert block to secure the elements to
just the relationship of the support to said vise
gether and look a pipe end to said forming wheel.
plate, means for adjusting said vise plate on said
2. In a pipe bending machine, a rotating form
base plate, the aforesaid base plate being notched
any of the principles of the invention. ,
ing wheel, a sliding form extending at a'tangent
at longitudinally spaced intervals, and a locking
to said wheel and adapted to cooperate there 50 key insertable in the notches and adapted for
with, a support for said sliding form shiftable
abutment against the rear face of said vise plate
radially with respect to said wheel to adjusted
to secure the latter in adjusted position against
positions, a track for said support, manually op
casual displacement.
erated means carried by said track for coarsely
'7. In a pipe ‘bending machine, a rotating
adjusting said support and correspondingly said 55 forming wheel, a sliding form shiftable longitu—
sliding form radially with respect to said wheel,
dinally opposite the periphery of said wheel and
means carried by said track for locking said sup
adapted to cooperate therewith, a. support for
port'against casual displacement, and additional
said sliding form, a base plate, said support being
manually operated means carried by said track
slidably mounted on said base plate and movable '
for ?nely adjusting said support radially with 60 radially of said forming wheel towards and away
respect to said wheel.
from the wheel, a vise plate slidably mounted on
3. In a pipe bending machine, a rotatable
said base plate outwardly of said support, a screw
forming wheel, a sliding form adapted for co
for connecting said support with said vise plate
operation therewith, a .base plate, a support for
threaded through the vise plate and having its
said sliding form shiftable along said base plate 65 inner end swiveled to said support, said screw
radially with respect to said forming wheel, a
when turnede?ecting adjustment of the support
vice-plate slidably mounted on said base plate
with respect to the vise plate, means for adjust
outwardly of said support, manually adjusted
ing said vise plate along the base plate to cor
means carried 'by said vise-plate and engaged
respondingly shift said support and sliding form
with said support for adjusting the position of 70 towards and away from said forming wheel, and
said support upon said base plate, and manually
means adjustably carried by said base plate for
operated means for adjusting said vise-plate and
holding said vise plate against movement along
said support as a unit along said base plate rela
the base plate in a direction away from the wheel.
tive to said forming wheel.
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