Improvements in Machinery for Bending and Coiling Pine.
Year: 1889

page_text: COMPLETE SPECIFICATION.
Improvements in Machinery for Bending and Coiling Pine.
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 metal pipe or tubing into flat
zig-zag coils such as for ice-machines cooling apparatus and the like and the novelty
will be fully understood from the following description and claims when taken in
connection with the annexed drawings in which
Fig. 1 is a perspective view of my improved machine.
Fig. 2 is a vertical section on the line - of Fig. 1.
In the drawing, numeral 1 indicates the machine table or frame, indicates the
drive shaft journaled beneath the table and provided with a drive pulley at its outer
end. The inner end of said drive shaft is provided with a worm 5 which meshes with
a worm wheel 6 secured to the lower end of the shaft or spindle 7 journaled in the
machine frame. A block 8 slides in a slot 9 in the machine table to be engaged by
one end of a hand screw 11. which has a threaded bearing in a lug 13 on the frame
or table.
A shaft or spindle 15 is journaled in the inner end of said slide and has a cog
wheel 17 on its lower end which meshes with a cog-wheel 18 upon the shaft or
spindle 7 below said table. Said shaft or spindle 7 is formed with a shoulder 19
flush with the frame and has, two halves 20 and 21 of a bending roller or disk fit
upon the shaft and are clamped against said shoulder by lever nut 22 on the upper
reduced and screw threaded end 23 of said shaft with a washer 25 interposed. Said
roller halves 20 and 21 are formed with circumferential grooves or recesses which

page_text: form one circumferential groove 26 nearly semi-circular in cross section and at
registering points of their peripheries said roller halves are provided respectively with
a downwardly and upwardly hooked clamping or gripping jaw 27 and 28 which jaws
have their hooked end meeting and form a circular eye, clamp or grip.
A pin 29 projects from the face of one of said roller halves and into a registering
hole 30 in the meeting face of the other roller half, said pin and hole serving to keep
said clamping or gripping jaws registering with each other. A roller 31 is detachably
secured upon the shaft or spindle 15 in the slide 8 and has the same hight and
diameter as the divided roller 20-21 and is provided with a nearly semi-cylindrical
circumferential groove 32 which registers with the groove 26 in the opposite
roller.
Said roller 31 is formed with a notch or recess 33 which extends from the periphery
and is sufficiently deep and wide to receive the clamping or gripping jaws of the
opposite roller which jaws may register with said notch or recess and project into
the same whenever said rollers are revolved. A guide roller 34 formed with a
nearly cylindrical circumferential groove 35 of the same size as the grooves in the
hending rollers, is journaled-with its short shaft upon the face of the machine table
and with its groove in a line with the groove in the notched or recessed roller 31
and in a line at right angles to a line drawn between the centers of said rollers. In
practice, the nut 22 which clamps the two roller halves 20 and 21 together is loosened
sufficiently to admit of the end of the pipe to be bent to be inserted and slid between
the clamping or gripping jaws 27 and 28 up to the place at which it is to be bent.
The nut is thereupon tightened so as to give said jaws a firm hold upon the end of the
pipe whereupon the rollers are started to revolve, the divided roller carrying the pipe
around witli it until it has been bent sufficiently.
The pipe will bear against the guide roller and the grooved roller 31 will bear
against the side of the pipe opposite to the divided roller so that the pipe will retain
its shape in the bend without being flattened. The notch or recess 38 will admit of
the pipe remaining in the clamping jaws during the entire process of bending as it
allows the jaws to pass around between the two rollers and there will consequently be
no necessity for loosening the clamping jaws and shifting them during the process of
bending the pipe.
After one bend has been formed and more bends are desired as in a flat zig-zag
coil, the clamping nut 22 is loosened when the rollers may be reversed, the jaws
sliding upon the bend of the pipe back to their starting point in the recess or notch of
the opposite roller. The pipe may now be slid between the clamping jaws until ite
arrives at the point where the next bend is to be when the pipe is turned within the jaws
if the bend is to be in the opposite direction of the former bend, and clamped in
said jaws by the clamping nut whereupon the rollers are again revolved and another
bend is formed. If it is desired to form all the bends in the same direction, the pipe
is not turned in the jaws but the jaws are merely slid back upon the bend of the pipe
to the starting point in the recess or notch in the opposite roller, the pipe is slid
forward between the jaws to the next bending point and bent by the revolving rollers.
As the diameter of the bend or elbow formed in the pipe depends upon the diameter
of the bending rollers, said rollers must be changed and substituted by rollers of
suitable diameter when bends of a different diameter are to be formed and the size
of the circumferential grooves in said rollers must correspond to the size of pipe
bent by them as said pipe must fit snugly in the grooves and in the clamping
jaws.
The cogs of the two cog wheels 17 and 18 upon the shafts of the bending rollers
are of a sufficient length to admit of their meshing with each other under various
adjustments of the shaft 1 in the adjustable slide. at various distances from the
shaft 7 said distances depending upon the diameters of the bending rollers, the
function of said adjustable slide or block 8 being to adjust said shafts or spindles at
their proper distances from each other according to the diameters of the bending
rollers.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what I
claim is
1. In a machine for bending pipe, a roller provided with a gripping clamp or eye
projecting radially from its periphery, in combination with an opposite roller
having a groove or recess to receive the said gripping clamp or eye, substantially as
specified.
2. In a machine for bending pipe, a bending roller comprising two separable
sections carrying a part to form a gripping clamp or eye, in combination with a
bending roller having a groove or recess adapted to receive the said clamp or eye,
substantially as specified.
3. In a machine for bending pipe, a bending roll formed in two separable sections
and each having a circumferential curvilinear groove at their adjacent sides and also
having respectively a part which forms a gripping clamp or eye, in combination with
a bending roll having a groove or recess to receive the said clamp or eye and also a
circumferential curvilinear groove to match the corresponding groove in the opposite
roll, substantially as specified.
4. In a machine for bending pipe the combination of a shaft formed with a shoulder
and with a reduced and screw threaded upper end, a roller which consists of two
halves formed with grooved or recessed elges which form a nearly semi-cylindrical
groove in the periphery of said roller provided with two registering hook-shaped
clamping jaws in their peripheries which form a projecting eye and with a
registering pin and hole in their facing sides a washer upon said shaft and supported
upon the top of said roller and a nut upon the screw-threaded end of said shaft
and clamping said washer and roller halves against the shoulder upon said shaft,
substantially as described.
5. In a machine for bending pipe the combination with a bending roller provided
with a projecting eye at its periphery, of an opposite bending roller formed in its
periphery with a notch or recess which registers with and receives said eye substan-
tially as described.
6. In a machine for bending pipe the combination with a bending roller provided
with a projecting and adjustable clamp or grip at its periphery, of an opposite bending
roller formed in its periphery with a notch or recess which registers with and receives
said eye substantially as described.
7. In a machine for bending pipe the combination with a bending roller formed
with a slightly less than semi cylindrical and circumferential groove and provided
with projecting and adjustable clamping jaws at its periphery, of an opposite bending
roller formed with a similar circumferential groove and in its periphery with a notch
or recess which registers with and receives said eye, substantially as described.
8. In a machine for bending pipe, the combination of a frame or table formed
with a transverse slot and with a bearing at the inner end of said slot, a spindle or
shaft journaled in said bearing, a block which slides in said slot and is formed with
a lip at its outer end and a bearing at its inner end a screw which fits through a
screw threaded perforation in a lip upon said table at the outer end of said slot and
bears against the lip upon said sliding block, a shaft or spindle journaled in the
bearing in said sliding block, two meshing cog wheels which are of the same diameter
provided with long cogs and secured upon said spindles or shafts means for revolving
one of said spindles or shafts and interchangeable bending rollers upon said spindles
or shafts substantially as described.
9. In a machine for bending pipe, the combination of a circumferentially grooved
bending roller provided with a projecting clamping or gripping eye, a circumferentially
grooved bending roller formed with a notch or recess in its periphery which registers
with said eye and a circumferentially grooved guide roller arranged in a line with the
space between the bending rollers and at right angles to a line drawn through the
centers of said rollers substantially as described.

page_text: 10. In a machine for bending pipe the combination of the machine frame or table
formed with the slot 9, the drive shaft 3, formed with the worm 4, the shaft or
spindle 7 formed with the threaded end 23 and with the worm wheel 6 and cog
wheel 18 and journaled in said frame or table, the divided and grooved roller 20--21
formed with the jaws 27 and 28, the washer 25 and handled nut 23-24 the sliding
block 8 having the adjusting screw 11, the shaft or spindle 15 journaled in said
sliding block and provided with a cog wheel 17 the roller 31 upon said shaft and
formed with the groove 32 and notch or recess 33 and the guide roller 34 substan-
⚫tially as described.
Data This 3.1 Love at
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