IMPROVED MACHINERY FOR MAKING DOUBLE SPIRAL SPRINGS FOR SPRING MATRESSES, AND OTHER UPHOLSTERY PURPOSES
Year: 1884

page_text: I, GEORGE LUMB of 35 Bell Hall Terrace Halifax, Yorkshire, Foreman Mechanic
do hereby declare the nature of my invention for "IMPROVED MACHINERY FOR
MAKING DOUBLE SPIRAL SPRINGS FOR SPRING MATRESSES, AND OTHER UPHOLSTERY
PURPOSES," to be as follows:-
The object of my Invention is to make two spiral springs from one length of
wire, so that when such springs are made they will stand erect side by side, and
will be found much better adapted for upholstery purposes than single springs
which are at present used.
The form of apparatus I employ consists of two vertical shafts each carrying
a spindle, and a suitable shaped bobbin at their upper end, one of such shafts runs
in fixed bearings, whilst the other shaft runs in footsteps or bearings carried by
a radial arm.
The bobbins rest upon a flange on the top of the vertical shafts, and are caused
to rotate thereby, such bobbins having a spiral groove cut or formed on the
periphery thereof, except the last coil which is parallel with the bottom of the
bobbin. When a double spiral coil is about to be made, one end of the wire is
placed in a hole formed on the top of the bobbin, or in a nut on the top thereof, in
connection with the shaft working in fixed bearings, and as the spindle rotates the
wire follows the groove cut in the bobbin; using ono half of the wire and forming
one spring; the other end of the said wire is now placed in a hole formed in a nut
on the other bobbin, which is attached to a shaft rotating in bearings on the radial
arm, and as the said bobbin rotates, the wire follows in the groove cut therein, but
in so doing the radial arm must of necessity approach the fixed spindle in the same
proportion as the wire is being taken up which it does until it has reached the end
of its traverse, by which time the other half of the wire will have been used up, and
another spring formed.
It will therefore be seen that by this means two spiral springs are made from
one length of wire, the length and diameter of which are determined by the size of
the bobbins.
The rotary shafts can be driven by means of pulleys or gearing as will be readily
understood by those conversant with mechanics.

page_text: I, GEORGE LUMB of 35 Bell Hall Terrace, Halifax, Yorkshire, Foreman Mechanic
do hereby declare the nature of my invention for "IMPROVED MACHINERY FOR
MAKING DOUBLE SPIRAL SPRINGS FOR SPRING MATTRESSES, AND OTHER UPHOLSTERY
PURPOSES," and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
The object of my Invention is to make two spiral springs from one length of
wire so that when such springs are made they will stand erect side by side, and
will be found much better adapted for upholstery purposes than single springs
which are at present used.
The form of apparatus I employ consists of two vertical shafts each carrying
a spindle, and a suitable shaped bobbin at their upper end, one of such shafts runs
in fixed bearings, whilst the other shaft runs in footsteps or bearings carried by
a radial arm.
The bobbins rest upon a flange on the top of the vertical shafts and are caused
to rotate thereby, such bobbins having a spiral groove cut or formed on the
periphery thereof, except the last coil, which is parallel with the bottom of the
bobbin.
Such being the nature and object of my Invention I will now proceed to describe
the same more fully, being aided by the accompanying Sheets of Drawings wherein
Fig is elevation of a machine constructed according to my Invention, and Fig 2
is plan of same. A is framework of machine carrying a plate or table B, and C, D,
are two conical bobbins resting upon collars E, F on the top of vertical, spindles G
and H.
The main driving shaft J is driven either by strap or manual labor, and by bevil
wheels K and L the said shaft communicates rotary motion to the vertical shafts M
and N. These shafts M and N carry pulleys O and P which by means of chains
R and S impart rotary motion to the vertical spindles G and H, and consequently
to the conical bobbins on the end thereof, it will however be seen that the spindles
G and H can be disconnected from the chain pulleys by clutches T and T¹ operated
by hand levers U.
The spindle G runs in stationary bearings but the spindle H rotates in a foot-
step supported by the radial arms W and W' projecting from the shaft N by
which means the spindle H can oscillate to and from the stationary spindle G,
a curved slot X being made in the table B for that purpose.
The conical bobbins have spiral grooves cut in them, and when a double spiral
coil is about to be made, the clutch T is disengaged so that the bobbin is stationary.
One end of the wire is then placed in a hole formed in the top of the bobbin C or
in a nut on the top thereof, the clutch is then engaged and the bobbin set in
motion which winds the wire in the groove using up one half of the wire and
forming one spring, the other end of the said wire is now connected to the bobbin D
which is also rotating and as the wire is being wound thereon in the groove it
follows that it must approach the spindle G working in stationary bearings (in the

page_text: same proportion as the wire is being taken up) which it does, the radial arm
carrying it to the end of its traverse by which time the other half of the wire will
have been used up and another spring formed making thereby a double or com-
pound spring as shewn in Fig 3.
It will therefore be seen that by this means two spiral springs are expeditiously
made from one length of wire, the length and diameter of which are determined by
the size of the bobbins.
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
In combination with a rotary bobbin supported by a spindle in fixed bearings,
the use of a bobbin carried by moveable bearings so that one bobbin can approach
the other as the wire is wound thereon, in manner substantially as herein shewn
and described.