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 pipes and it will be fully
understood from the following description and claims when taken in connection with
the accompanying drawings in which
Fig. 1 is a plan view of my machine showing the coil pipe indicated by dotted
lines.
Fig. 2 is a vertical section on the line - of Fig. 1 and
Fig. 3 is a vertical section on the line y-y of Fig. 1.
In the drawing numeral 1 indicates the machine table or frame and 3 the drive
shaft journaled beneath the same.
Said drive shaft is provided at its inner end with a worm 5 which meshes with a
worm wheel 6 secured upon the lower end of a shaft or spindle 7 journaled in the
table..
A slide or block 8 slides in a slot 9 in the machine table and has a lug 10 at its
outer end against which the inner end of a screw 11 which has a threaded bearing in
A shaft or spindle 15 is
a lug 13 upon the edge of the machine frame may bear.
journaled in a bearing 16 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 frame or table. 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 circumferential groove 20.
A feed roller 21 is removably secured upon the shaft or spindle 15 in the adjustable
slide or block 8 and is formed with a slightly less than semi-cylindrical circumferential
groove 28 and with a still deeper narrow groove 23 in the bottom of said groove 22.
A guide roller 24 is journaled upon the machine frame or table with its periphery in
a line with said deeply grooved feed roller 21 and in a line at right angles to a line
drawn between the centers of the two feed rollers 19 and 21.

page_text: The machine frame or table is formed with a diagonal slot 25 which extends from
one corner of said table and towards the space between the feed rollers and a slide or
block 26 fits and slides in said slot and has an upwardly projecting lip 27 at its outer
end. The inner end of a screw 28 which is provided with a hand wheel or disk 29
and fits and revolves in a threaded perforation 30 in a lip 31 at the corner of the table
bears against said lip 27 of the slide 26 and serves to adjust the same in the slot.
A plate or block 32 is pivoted at its middle upon the upper side of said slide 26 and
has a narrow bending roller 33 journaled upon its inner end. Said narrow bending
roller will fit into the deep groove 23 in the feed roller 21 and is formed with a
circumferential partly cylindrical groove 34 which is formed with the same radius as
the grooves of the feed rollers so that said groove 34 may form a continuation of the
groove 22 in said feed roller 21 as will be seen by reference to Fig. 2 of the
drawing.
An inwardly projecting lip 35 is formed at the edge and near the outer end of the
slot 25 and a screw 36 provided with a hand wheel or disk 37 is fitted in a threaded
perforation 38 in said lip and bears with its inner end against the side edge of the
outer end or portion of said pivoted block or plate 32. An oblique guide 39 or a
guide roller or similar device is adjustably 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 diameter 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 deeply grooved
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 a bending roller, of a
suitable diameter and with a circumferential groove corresponding to the grooves in
the feed and guide rollers is adjusted:**
The pipe is now adjusted. between the feed rollers and the narrow bending roller will
by bearing against one side of said pipe and by being forced against it by the screw 28
bend it and when the desired bend or diameter of coil has been obtained by adjusting
said bending roller by means of the screws 28 and 36 the pipe may be fed through the
rollers and coiled without any stoppage or further adjustment the guide 39 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 roller and that the diameter will be increased by tilting said roller out from
the feed rollers by means of the laterally tilting frame and its side screw 36 and by
drawing said roller away by the slide and its screw 28.
When a cylindrical coil is formed, the bending roller remains in its adjusted position
but when a conical coil is to be formed the bending roller is first gradually fed towards
the feed rollers and pipe by means of the slide and the end screw 28 forming the
larger coils and thereupon when said slide has arrived at the inner end of its slot fed
into the deep groove in the feed roller and still closer to said pipe forming the smaller
coils by means of the tilting frame or plate and the side screw 36.
It will be obvious that on account of the bending roller projecting into the deep
groove of the feed rollers said roller will bear against the pipe in the space between
the feed rollers and at a point very close to the point at which the deeply grooved feed
roller bears against it so that the pipe will be gradually and evenly bent said feed
roller and bending roller following the contour of the opposite feed roller for a portion
of its periphery and thus forming a perfect support for the pipe while it is being bent
and causing a smooth and even curve without breaks and straight or uneven
portions.
Instead of having the bending roller project into a groove in the feed roller said
roller may be so shaped as to project into the space between the feed rollers in various
other ways or it may be substituted by one or more smaller shaping or bending rollers
or a similar shaping or bending device without departing from the spirit of my
invention.

page_text: 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 grooved feed
roll of a feed roll having a groove of greater depth and a bending and shaping roll
having its periphery extending into the periphery of said deeply grooved roll, substan-
tially as specified.
2: In a machine for bending and coiling pipe the combination with a grooved feed
roll, of a feed roll having a groove of greater depth and an adjustably arranged
bending and shaping roll having its periphery extending into the periphery of said
deeply grooved feed roll, substantially as specified.
3. In a machine for bending and coiling pipe the combination with a pair of
feed rollers, of a bending roller which projects into the space between said feed
rollers to a point within the periphery of one of them and a slide which forms a
bearing for said roller and is provided with a feed screw for adjusting it towards and
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 pivoted plate or frame and a bending roller which is
journaled upon the inner end of said plate or frame and together with one of said feed
rollers forces 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 bonding and coiling pipe the combination of a feed roller, an
opposite feed roller formed with a deep groove in its periphery and a bending roller
which is journaled to project with its edge into the deep groove of said feed roller and
together with said roller to force the pipe to follow the contour of said other feed
roller for a portion of its periphery substantially as described.
6. In a machine for bending and coiling pipe the combination of a feed roller
formed with a circumferential groove a feed roller formed with a circumferential
groove and a deeper groove in the bottom of said groove and a narrow bending roller
which is journaled to project into said deeper groove and formed with a circumferential
groove of the same diameter as the grooves in said feed rollers and which together
with said deeply grooved roller forces the pipe to follow the contour of the opposite
feed roller for a portion of its periphery substantially as described.
7. In a machine for bending and coiling pipe the combination of a circumferentially
grooved feed roller an opposite feed roller formed with a circumferential groove and
with a deep groove in the bottom of said circumferential groove, a circumferentially
grooved bending roller which is journaled to project into said deep groove and together
with said deeply grooved feed roller to force the pipe to follow the contour of the
opposite feed roller for a portion of its periphery and means for adjusting said bending
roller to project more or less into said deeply grooved roller and towards said opposite
feed roller substantially as described..
8. In a machine for bending and coiling pipe the combination of a circumferentially
grooved feed roller, an opposite feed roller formed with a corresponding circumferential
groove and with a deep groove in the bottom of said groove a slide which projects
with its inner end toward the space between said feed rollers a screw for adjusting
said slide toward or from said rollers and a circumferentially grooved bending roller
which is journaled at the inner end of said slide to project into the deep groove of
said feed roller and together with said feed roller to force the pipe to follow the
contour of the opposite feed roller for a portion of its periphery substantially as
described.
9. In a machine for bending and coiling pipe the combination of the machine frame
or table formed with the diagonal slot 25 the circumferentially grooved feed roller 19,
the opposite feed roller 21 formed with the corresponding circumferential groove'22

page_text: and with a deep groove 23 in the bottom of said groove the guide roller 24, the
oblique guide 39 the slide or block 26 in said diagonal slot the screw 28 for adjusting
said slide the plate or block 32 pivoted upon said slide the screw 36 for laterally
adjusting said plate or block and the narrow bending roller 33 which is journaled at
the inner end of said pivoted plate or block and projects into the groove 23 of 5
said feed roller 21 substantially as described.
7000