Improvements in Machines for Bending Metal Bars the same being applicable for use in the Manufacture of Laminated Springs.
Year: 1897

page_text: Improvements in Machines for Bending Metal Bars the same being
applicable for use in the Manufacture of Laminated Springs.
We, HENRY CROFTS LONGSDON of the firm of W. Summerscales and Sons
Limited of Keighley in the County of York, Laundry Engineers and Machine
Makers and FRANK WILKINSON of the same place, Foreman, do hereby declare the
nature of this invention to be as follows:-
That is to say It relates to improvements in machines for bending metal bars the
same being especially for use in the manufacture or production of laminated springs,
and consists of arranging the several parts of which said machines are formed, in
such a manner as to enable them to be operated by a driving belt deriving its power
and motion from any prime motor or other rotary shaft, while same may be easily
put into and out of effective operation as occasion may require.
In carrying our invention into effect we employ the form of sliding "dies" or
shaping pieces, that are in common use on machines for bending the several layers
of metal strips, forming the spring when completed, at one operation, however instead
of having these "dies" to be moved by the operative manually rotating a screw, we
arrange a cam or eccentric to be rotated in bearings supported by the machine
framework in suitable proximity with the said noveable "dies" so that as said cam
or eccentric revolves it will impart motion thereto as desired.
The sliding "die" in each machine is formed for attachment to a sliding block to
which is hinged an arm carrying an antifriction bowl or runner for contact with the
eccentric when the sliding block is desired to make its advancing, movement.
This pivotted arm has a handle secured to its pivotal shaft in order that it may be
upright."
When
thereby brought into a horizontal or other position preferably "
the arm is brought into its horizontal position its antifriction bowl lies in the path of
motion of the cam, while said arm further forms a rigid extension of the sliding
block so that as the eccentric continues its motion it forces said block through
pressing on its bowl and arm, to the extent of its path of motion where the "die"
carried by said block will have pressed the strips of metal firmly against the other
"die" to shape them as required; on which, as said eccentric recedes the block will
be caused by a retracting weight arranged by chains passing over suitable guide
pulleys or by being mounted on lever arms, to follow until the extent of its path in
this direction is reached when by the somewhat suddenness of its stoppage at this
place, the handle on the pivotal arm descends, causing this latter to rise out of the
path of motion of the eccentric until the operative again requires and moves it to
recommence its operations.
1007
HENRY C. LONGSDON
FRANK WILKINSON
Per Samuel Hey
Agent,

page_text: Improvements in Machines for Bending Metal Bars the same being
applicable for use in the Manufacture of Laminated Springs.
We, HENRY CROFTS LONGSDON of the firm of W. Summerscales and Sons Limited
of Keighley in the County of York, Laundry Engineers and Machine Makers, and
Makers, and FRANK WILKINSON of the same place, Foreman, 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 :-
That is to say:-It relates to improvements in machines for bending metal bars
the same being especially for use in the manufacture or production of laminated
springs, and consists of arranging the several parts of which said machines are
formed in such a manner as to enable them to be operated by a driving belt deriving
its power and motion from any prime motor or other rotary shaft, while same may
be easily put into and out of effective operation as occasion may require.
In the accompanying sheets of drawings, Fig. 1 is a side elevation and fig. 2 a
plan or top view of a machine made in accordance with our invention.
Figs. 3 and 4 are similar views to figs. 1 and 2 respectively but illustrate only a
portion of the machine and that of a modified construction as is hereinafter
described.
Fig. 5 is a drawing in detail of a part hereinafter described.
"dies" a and
In carrying our invention into effect we employ the form of sliding
shaping pieces 6 that are in common use on machines for bending the several layers
of metal strips, forming the spring when completed, at one operation, however
instead of having these "dies" to be moved by the operative manually rotating a
screw we arrange a cam or eccentric c (or a crank g may be used as hereinafter
explained) to be rotated by its shaft d mounted on the machine's framework f in
suitable proximity with the "die" a so that as said cam or eccentric c (or crank g)
revolves it will impart motion to said die a as desired, by the means hereinafter
described.
The die a is made so that it may be secured to the sliding block k (which operates
upon its bearings k k formed upon or secured to the framework f) to which is hinged
an arm m, (or m¹ see figs. 3 and 4) which (arm m) carries an antifriction bowl or
runner n for contact with the eccentric or cam c when said arm is placed in its
horizontal position shewn in broken lines fig. 1 which is the case on the operative
desiring the "die a to perform its advancing movement.
This arin m has a handle o secured to its pivotal shaft p in order that it may be
thereby brought into a horizontal or other position preferably upright. When the
arm m is in its upright position shown by the drawings, although the eccentric c 3
is continuing its rotary motion no motion is transmitted to the said arm m, but
when it is brought into its horizontal position as that shown in broken lines tig. 1
then its antifriction bowl n lies in the path of motion of the cam or eccentric c while
its arm m forms a rigid extension of the sliding block h so that as the eccentric c
continues its motion it forces said block h by pressing upon its bowl n and arm m, 4
to the extent of its path of motion where the die a will have pressed the strips of
metal firmly against the die 6 to shape them as required, such position of the die a
being shown in broken lines fig. 2; on which as said eccentric recedes the block will
be caused by the retracting weights 8 8¹ arranged by chains t t passing over suitable
guide pulleys 2 ts (or by such weights being mounted on lever arms if desired) to 4
follow until the extent of its path in this direction is reached when by the
somewhat suddenness of its stoppage at this place, the handle o descends and raises
the arm m into the position shown in full lines fig. 1 in which position it is out of

page_text: the path of motion of the eccentric c until the operative again requires and moves it,
to recommence its operations.
The rotary motion of the shaft d is obtained from any source of power through the
belt operating the driving pulley v on the shaft w on which the wheel w¹ is secured
so that its motion may be transmitted to the wheel w² secured to the shaft d.
To transmit reciprocatory motion to the die a in both directions "positively" a
a crank g is used (as shown by Figs. 3 and 4) the same being coupled to the die's
block h by an arm m¹ while the disengaging of this mechanism is carried out by the
moveable key x being operated by the lever y (see detail drawing fig. 5) and any
suitable pedal mechanism as will be readily understood.
Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed, we declare that what we
claim is :-
1. In mechanism of the class described a rotary cam or eccentric, a sliding block
and die and means whereby motion may be transmitted from said cam or eccentric
to said die the several parts being constructed and arranged to operate in combination
substantially as herein specified.
2. In mechanism of the class described, a rotary cam, eccentric or crank, a die
and means for coupling said parts together the same being constructed and arranged.
to operate in combination substantially as herein specified.
3. The improved mechanism for bending bars or strips of metal the same being
arranged to operate substantially as herein specified.
Dated this 28th day of October 1807
HENRY C. LONGSDON
FRANK WILKINSON
Per Samuel Hey,
Agent.