Improvements in Pipe Benders.
Year: 1894

page_text: Date of Application, 2nd Aug., 1894-Accepted, 8th Sept., 1894
COMPLETE SPECIFICATION.
Improvements in Pipe Benders.
We, THOMAS SEATON, Senior, of 139, Brock Avenue, and JOHN THOMAS
FRASER, of 75, Adelaide Street, East, both of the City of Toronto, in the
County of York, in the Province of Ontario, Canada, 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:-
Our invention relates to improvements in pipe benders and the object of the
invention is to design a simple, efficient, strong and compact machine by which pipe
of different metals and of different diameters may be given a uniform bend when
cold from any desired radius without materially affecting the strength of the pipe or
causing it to pucker or become of less diameter and it consists essentially in
providing a stationary grooved wheel journalled in a suitable standard and a
movable grooved wheel capable of rotation journalled in a swinging arm pivoted on
the central bolt upon which the stationary grooved wheel is supported, means being
provided for adjusting the movable grooved wheel longitudinally, for holding one
end of the pipe firmly in position while being bent, and for folding the machine into
compact shape for transportation, the machine being otherwise constructed and
arranged in detail as hereinafter more particularly explained.
Fig. 1, is a perspective view of my machine complete with the pipe inserted in
position ready to be bent.
Fig. 2, is a perspective view partially in cross section showing one side of the
machine removed.
Fig. 3, is a detail showing the holding blocks and the manner in which they are
connected together and to the top of the standard.
In the drawings like letters of reference indicate corresponding parts in each
figure.
A, A, are the standards formed of suitable size and shape and connected together
at the hottom by the bed-plate, A'. B, is a bolt which extends through the upper
portion of the standard near the front thereof. C, is a bolt which extends through
between the standards, A, A, to the rear of the bolt, B. D, is the stationary
grooved wheel the groove of which is of a size corresponding to the arc of the pipe,
which is to be bent. The wheel, D, has a slot, d, cut in it from the centre to the
periphery. When the wheel, D, is placed in position the bolts, B, and, C, extend
through the slot as indicated in Fig. 2, and thereby support the wheel. d', is a
segmental recess cut out of the grooved wheel, D, as shown.
E, E, is a double arm which is connected together at the top by the handle, E',
and at the bottom is journalled upon the bolt, B. F, is the upper movable wheel
the groove of which corresponds to the groove of the lower stationary wheel, D.
The grooved wheel, F, is shown smaller in diameter than the grooved wheel, D,
and is journalled upon the bolt, f. which extends into side bars, e, e, located to
the outside of the slots e', e', made longitudinally in the double arm, E, E.
f, is a cross bar, which is of greater width than the slots, e¹, e', in the double
arm, E, E, but has reduced ends, f, which extend through the slots, el, e', into
the bars, e, e.
The reduced ends, f, are threaded and have nuts, f³, on them so as
to hold the side bars, e, e, close to the double arm, E, E.
9, is a cross bar secured within the double arm E, E. G, is a threaded spindle,
which is screwed through the cross bar, g. The lower end of the spindle, G, has
no thread in it but has two collars g', g', by which the lower end is retained
within the cross bar, f¹. The upper end of the screw spindle, G, has a double

page_text: collar, gg, which abuts both sides of the protecting plate, H. G', is a hand
wheel, which is secured at the top of the screw spindle.
It will be seen that by means of the screw spindle connected to the side bars, e, e,
by the cross bar, f, that the movable wheel, F, may be adjusted longitudinally
either away from or close to the wheel, D, according as to whether it is desired
to place the pipe in position or bring the wheels F, and, D, to abut each other in
order to make the bend.
I, I, are the upper and lower blocks which have a cylindrical hole formed
between them by the arc-shaped portions, i, i. The ends of these holding
blocks, I, I', have notches, 2, 3, respectively. The lower block, I', has recesses,
at the bottom at each end which when placed in position fit over the rectangular
projection, a, formed at the top of the standards, A. J, is a swing bolt, the
trunnion portion, J', of which is pivoted within the bosses a¹, formed on each
standard, A, to the outside. The upper end of each swing bolt, J, is threaded
and is preferably provided with a butterfly nut, K.
It will now be understood that by placing the block, I', in position so that
the recesses, i, at each end fit over the projection, a, at the top of the standards, A,
the pipe may be placed in position in the hole, . The upper block, I, may then be
placed on top of the block, 1', and the swing bolts thrown into the slots, 2, and, 13,
and the butterfly nuts, K, screwed down so as to hold the end or desired portion of
the pipe securely in position.
The double arm, E, E, would be in the position shown in Fig. 1. By pulling the
double arm, E, E, in the direction indicated by arrow to the position_shown in
Fig. 2, the desired bend may be formed. If necessary such double arm E, E, may
be even lowered still farther to bend still more.
When it is desired to transport our machine we have simply to throw out
the swing bolts, J, and remove the blocks, I, I', when the standard, A, A, may
be thrown up into the position shown in dotted lines in Fig. 1, and the bed-plate, A,
secured by the hook or catch, e'. In such position the machine may be carried from
place to place very conveniently.
It will be noticed in Fig. 1, that the segmental recess, d, permits of the holding
blocks, I, I, being brought close up to the tangential portion of the groove, so that
there will be no danger of the pipe kinking or puckering between the holding blocks
and the portion of the grooved wheel where the bend is started.
We find in practice that such machine as we describe is very convenient
in form and simple to operate, so much so, that pipes which at present take
considerable time to bend inay be bent within a minute, and this to, when the pipe
is quite cold.
Our machine it will be readily understood may be applied to all pipes of different
metals and is particularly adaptable for bending lead, so that the bend will be
uniform and the internal diameter of the pipe practically as perfect as when the
pipe is straight.
It will also be understood that in order to bend pipes of different diameters it is
simply necessary to withdraw the stationary wheel, D, and substitute another one
of different width or size of groove according to the pipe it is desired to bend. The
movable wheel, F, may also be changed by withdrawing the bolt, f.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. In a pipe bender the combination with the standards and stationary grooved
wheel supported therein and means for holding one end of the pipe, of a swing arm
pivoted on the central bolt supporting the stationary wheel and provided with a
grooved wheel adjustably held within the arm as and for the purpose specified.
2. In a pipe bender the combination with the standards and stationary grooved
wheel supported therein and means for holding one end of the pipe, of a swing
arm E, E pivoted on the central bolt supporting the stationary wheel and provided

page_text: with a grooved wheel F journalled on the bolt f extending through the slots, e¹, e',
into the side bars, e, e the cross bar, f, the ends of which also extend through
the slots e¹, e, into the side bars, e, e, and the threaded spindle, G, screwed through
the cross bar, g, secured in the cross bar, f, at the bottom as and for the purpose
specified.
3. In a pipe bender the combination with the standards and stationary grooved
wheel supported therein and means for holding one end of the pipe, of a swing
arm, E, E, pivoted on the central bolt supporting the stationary wheel and provided
with a grooved wheel, F, journalled on the bolt, f, extending through the slots, e', e',
into the side bars, e, e, the cross bar, f¹, the ends of which also extend through the
slots, el, e, into the side bars, e, e and the screw spindle, G, screwed through the cross
bar, 9, secured in the cross bar, f', at the bottom and the guard, H, and handle, E',
arranged as and for the purpose specified.
4. In a pipe bender the combination with the standards and stationary grooved
wheel supported therein by the bolts, B, and, C, which extend through the radial
recess, d, and means for holding one end of the pipe, of the swing arm, E, E,
provided with an adjustably held grooved wheel, F, as and for the purpose
specified.
5. In a pipe bender the combination with the standards, A, A, and stationary
grooved wheel supported therein by the bolts, B, and, C, which extend through the
radial recess, d, the segmental recess, d', made in the wheel, D, and means for
holding one end of the pipe, of the swing arm, E, E, provided with an adjustably
held grooved wheel, F, as and for the purpose specified.
6. The combination with the standards and stationary grooved wheel supported
therein and the swing arm having the adjustable grooved wheel, F, capable of
rotation of the holding blocks, I, I, the block I, of which has recess, i, to fit upon
the upwardly extending projections, a, a, of the standard, A, A, and provided with
the central arc-shaped recesses, i, i, for the reception of the pipe and means for
holding such blocks together, so as to clamp the pipe during bending as and for the
purpose specified.
7. The combination with the standards and stationary grooved wheel supported
therein and the swing arm having the adjustable grooved wheel, F, capable of
rotation, of the holding blocks, I, I, having the notches, 2, and, 23, respectively. and
the lower block, I', having the recesses, , and the swing bolts, J, designed to be
brought to fit into the notches, 2, and, 3, and clamp the blocks together by means
of the butterfly bolts, K, as and for the purpose specified.
Dated this 2nd day of August 1894
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.