Year: 1889

page_text: I HERBERT ELLSWORTH FOWLER, of New Haven, in the County of New Haven
and State of Connecticut, United States of America, mechanic, do hereby declare the
nature of this invention and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement :-
-
My invention relates to machines for bending and coiling pipe and the novelty will
be fully understood from the following description and claims when taken in connection
with the accompanying drawings in which
Fig. 1 is a perspective view of my improved machine.
Fig. 2 is a plan view of the same showing the coiled pipe indicated by dotted
lines.
Fig. 3 a vertical section on the line - Fig. 2 and
Fig. 4 is a bottom plan view.
In the drawing the numeral 1 indicates the machine frame or tablo and 3, drive
shaft journaled beneath the same, said drive shaft 3, is provided at its inner end with
a worm 5 which meshes with a worm wheel 6 which is secured upon the lower end of
a shaft or spindle 7 journaled in the machine frame or table. A slide or block S
slides in a slot 9 in the machine frame and has the end of a hand screw 11 bearing
against the outer end, said screw has a threaded bearing in a lip 13 upon the edge
of the machine frame or table.
A shaft or spindle 15 is journaled in a bearing in the inner end of said slide or
block and has a cog wheel 17 upon its lower end which meshes with a cog wheel 18
upon the shaft or spindle 7 below said table or frame but above the worm wheel upon
said shaft.
A feed roller 19 is removably secured upon said shaft or spindle 7 above the table
or frame and said roller is formed with a slightly less than semi-cylindrical circum-
ferential groove 20.
A feed roller 21 which is formed with a corresponding slightly less than semi-
cylindrical, circumferential groove 22 is removably secured upon the spindle or
shaft 15, in the adjustable slide or block 8. A guide roller 23 is journaled upon the

page_text: machine frame or table with its periphery in a line with said féed roller 21 and in a
line at right angles to a line drawn between the centers of the two feed rollers 19
and 20.
The machine frame or table is formed with a diagonal slot 24 which extends from
one corner of said table and toward the space between the feed rollers and a slide or
block 25, slides in said slot and has a lng 26 at its outer end. This slide is adjusted
in the slot by a hand screw 27 which has a threaded bearing in a lug 30 on the table.
A plate or block 31 is pivoted at its middle upon the upper side of said slide 25, and
has two uprights 32 upon its upper face which form longitudinal bearings 33 for two
horizontal shafts 34 which are journaled one above the other in said bearings. The
binding rollers 35 are secured upon the inner ends of said shafts and the peripheries
or edges of said rollers are formed with moulds, rabbets, or grooves 36 which form
nearly a semicircle in section when the rollers are placed in their proper position with
their peripheries bearing against each other. The diameter for said semi-circle formed
by the grooves or rabbets of said rollers is the same as the diameter of the grooves of
the feed rollers, so that said rollers may form a continuation of the groove in the feed
roller 21 and may form a circular opening when brought to register with the groove
in the feed roller 19.
A lug 37 is provided near the outer end of the slot 24 and a hand screw 38 has a
threaded bearing in said lug and its inner end bears against the outer upright 32 of
said pivoted block or frame 31.
An oblique guide 41 or a guide roller or similar device is ajustably secured upon
the machine frame or table at the forward or feed-side of the feed roller 19 and serves
to guide the coil as it is formed by the rollers above the same.
In practice, feed and guide rollers of the appropriate diameters for the coils to be
made and having their circumferential grooves of a size to snugly fit the pipe to be bent,
are adjusted in their proper places, the adjustable slide for the feed roller 21 and the
long cogs of the gear wheels upon the roller shafts or spindles admitting of feed
rollers of varying diameters being used and bending rollers of a suitable diameter and
with grooves corresponding to the grooves in the feed and guide rollers are secured
upon their shafts.
The pipe is now inserted between the feed rollers and the bending rollers will by
bearing with their moulded, rabbeted ends against one side of said pipe and by being.
forced against it by the screw 27 bend it, and when the desired bend or diameter of
coil has been obtained by adjusting said bending rollers by means of the screws 27
and 38 the pipe may be fed through the rollers and coiled without any stoppage for
further adjustment, the guide 41 guiding the coils above the feed rollers and preventing
their being fouled or obstructed by the pipe which is fed into the machine.
It will be obvious that the diameter of the coils is adjusted by the adjustment of
the bending rollers and that the diameter will be in increased by tilting said rollers
out from the feed rollers by means of the laterally tilting frame and its side screw 38
and by drawing said rollers away by the slide and its screw 27.
When a cylindrical coil is formed the bending rollers remain in their adjusted
position but when a conical coil is to be formed, the bending, rollerstare first; gradually
fed towards the feed rollers and pipe by means of the slide and the end screw 27
forming the larger coils and thereupon when said slide has arrived at the inner end of
its slot fed towards the feed roller 21 are still closer to said pipe forming the smaller
coils by means of the tilting frame or plate and the side screw 38.
It will be obvious that on account of their moulded,irabbeted and reduced nearly
conical shape, the bending rollers may be tilted tfully into the space between the feed
rollers so that said bending rollers will bear against the pipe at a point comparatively
near to the point at which the feed roller 21 hears against it so that the pipe will be
perfectly supported while being bent and will not be liable to have uneven or straight"
portions or breaks in the bends or coils.
It will also be obvious that on account of the shape of the bending rollers, said
rollers having their diameters increasing toward the inner ends the metal of the pipe
which is being bent will be drawn upon the outer convex side of the bend of the

page_text: pipe by the portions of the rollers having the larger diameters and consequently
traveling relatively faster than the outer and smaller portions of the rollers which
revolve with less speed and therefore have a backwardly drawing or upsetting action
upon the pipe as they slip upon the same. This action of the bending rollers will
insure perfect bending without breaks in the pipe, admitting of coils of a smaller
diameter compared with the diameter of the pipe being formed that has heretofore been
possible with the machines now in use.
Said bending rollers may be used in connection with other means for supporting
the pipe and may be either stationary with the said supporting means or may be
movable around the saine and various other modifications and changes may be
made in the construction of my machine without departing from the spirit of my
invention.
The pipe will be bent while retaining its perfect shape in the coils as the bending
rollers will bear firmly against the outer side of the bend or coil of the pipe
and by their shape-force said pipe into shape while bending it so that said rollers
will prevent any flattening or changes of shape in the pipe.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is.
1. In a machine for bending and coiling pipe, the combination with a pair of feed
rollers, of a pair of bending rollers formed with moulded ends journaled one above
the other and arranged to project into the space between said feed rollers and together
with one of said rollers to force the pipe to follow the contour of the opposite
feed roller for a portion of its periphery and to form a continuation of the periphery
of said first named roller, substantially as described.
2. In a machine for bending and coiling pipe the combination with a pair of feed
rollers, of a pair of bending rollers formed with molded ends journaled one above the
other and arranged to project into the space between said feed rollers and together
with one of said rollers to force the pipe to follow the contour of the opposite feed
roller for a portion of its periphery and to form a continuation of the periphery of
the said first named roller and means for adjusting said rollers to and from said feed
rollers, substantially as described.
3. In a machine for bending and coiling pipe, the combination with a pair of
feed rollers, of a pair of bending rollers formed with moulded ends journaled one
above the other and arranged to project into the space between said feed rollers and,
together with one of said rollers to force the pipe to follow the contour of the opposite
feed roller for a portion of its periphery and to form a continuation of the periphery
of said first named roller and a slide which forms bearings for said bending rollers
and is provided with a feed screw for adjusting it toward or from said feed rollers,
substantially as described.
4. In a machine for bending and coiling pipe, the combination with a pair of feed
rollers, of a slide provided with a screw for adjusting it towards and from the space
between said feed rollers, a plate or frame pivoted upon said slide, a screw for tilting
or laterally adjusting said plate or frame and a pair of bending rollers which are
journaled one above the other at the inner end of said plate or frame and formed with
moulded ends and together with one of said feed rollers force the pipe to follow the
contour of the opposite feed roller for a portion of its periphery substantially as
described.
5. In a machine for bending and coiling pipe the combination of a pair of grooved
feed rollers, a slide provided with a screw for adjusting it toward and from the space
between said feed rollers a plate or frame pivoted upon said slide a screw for laterally
adjusting said plate or frame and a pair of bending rollers which are journaled upon
said plate or frame and formed with moulded ends which correspond to the grooves in
the feed rollers and together with one of said feed rollers force the pipe to follow the
contour of the opposite feed roller for a portion of its periphery substantially as
described,

page_text: 6. In a machine for bending and coiling pipe the combination of the machine or
table formed with the diagonal slot 24 the feeding rollers 19 and 21, formed with the
registering circumferential grooves 20 and 22, the guide. rollers 23, the guide 41 the
slide 25 in said slot 24 the screw 27 for adjusting said slide the plate or frame 31
pivoted upon said slide and formed with the uprights 32, which are provided with the
horizontal bearings 33, the screw 38 which hears against the outer upright 32, the
shafts 34 in said bearings 33 and the bending rollers 35 upon the inner ends of said
shafts and formed with the moulds, grooves or rabbets 36 which correspond in shape to
the grooves in said feed rollers substantially as described.
Datal this 15th day of Fab 1800