A Machine for Imparting a Helical Twist to Metal Wire or Laths.
Year: 1898

page_text: Date of Application, 2nd Nov., 1898
PROVISIONAL SPECIFICATION.
A Machine for Imparting a Helical Twist to Metal Wire or Laths.
GIOVANNI GIUSSANI, 6, Church Gardens, Ealing, SAMUEL SHAW CRISP, and
HERBERT GRICE, both of 139, Wardour Street, London, W., Wire Workers, do
hereby declare the nature of this invention to be as follows:-
This invention relates to a machine for imparting a helical twist to metal wire or
laths, these wires or laths being intended to be cut into lengths and woven
together to form a net or sheet which may be employed in fire-proof construction
of walls, floors, partitions, and for other purposes. The wire or lath preferably
used for the purpose is flat in form and of suitable widths, and is of mild steel
such as that known as "Homo" steel. This wire or lath is paid out from a reel
or drum placed at the end of the machine and is engaged between two rollers
made to revolve in opposite directions by means of cogged wheels and bevelled
gear; the wire passes through the latter to and through an arm attached to a
wheel by a double knuckle joint, so that the arm runs free while being extended
outwards at a certain angle and pointing in the direction of the rim of a play or
loose drum which revolves lengthwise in a cradle or frame; the cradle or frame
being made to revolve and thus carry the revolving drum with it; the end of the
arm may either rest against the rim of this drum or it may be kept at the required
angle by means of a bracket or other contrivance attached to the cradle or frame;
a pair of rollers, may be placed at the end of the arm if desired. After passing
through the arm the wire passes on to the rim of the play or loose drum, being
twisted in its passage thereto; the drum may be provided with a flange or flanges
if desired. The drum can be removed from the frame when desired and may be
provided with a spindle having a fixed or moveable key arranged so that the wire
can be wound round the drum by hand power when required, as for starting the
machine. The wire is wound round the drum for several turns, and is then
guided over a roller, through the bearings of the machine and over another roller
to a storage or winding drum driven by a band from a pulley operated by bevelled
gear at such a speed as may be desired; if desired the wire may pass over or
between several rollers of the same or different diameters. The storage drum is
placed in a cradle or frame made to receive it, by the side of and on the same axle
as a flanged or plain pulley having a pin fitted to its side, which pin fits into a
hole in the side of the drum, thus causing the latter to revolve at the same time
as the pulley placed by its side; the drum may be further affixed to the pulley by
a pin running through the axle if desired. The storage drum when filled can
be readily removed and another substituted. The rollers at the head of the
machine are so arranged as to revolve at a regulated speed, and so feed just the
amount of wire required to produce any sized twist; the wire then proceeds through
the machine on to the loose drum or pulley, and is finally pulled by the storage
drum at the end.
Tate this onl
1000

page_text: may be further affixed to the pulley by a pin running through the axle if desired,
or may have bolts and fly nuts affixed for the purpose.
The storage drum when filled can be readily removed and another substituted.
The rollers C. C1, at the head of the machine are so arranged as to revolve at a
regulated speed and so feed just the amount of wire A, required to produce any
sized twist.
On the axle of the storage drum O and pulley T is an eccentric U to which is
attached an arm W, operating with a ratchet and spring b and a small roller
or wheel a, in which is cut a worm Z; the revolution of the wheel a causes the
guide arm X to oscillate from side to side by reason of the stud Y which is attached
thereto and so evenly regulate the paying out of the wire passing between the
jaws d on to the drum 0.
In place of the arm F as shown in Fig. 4, we may if desired use an arm as
shown in Fig. 5, at F1, having a knuckle joint at F2, and pivotted at F3, the
passage of the wire A being identical with that in the first method. The driving
pulley of the machine is shown at e. In order to allow of the free passage of the
wire between the rollers L and N, the power is transmitted through the cogged
wheels shown at g, g¹, g², and 93.
The full operation of the machine is as follows:-The power is communicated
to the driving pulley e causing the revolution of the cradle or frame S and cogged
wheel. the power thence passing to g¹, g, to g², the latter carrying with it the
frame J; from thence the power is carried through the bevelled gear E to cogged
wheels D, D1, causing the rollers C, C1 to engage the wire or lath A and draw the
same from the loosely running reel B; the wire or lath A passes through the
arm F on to the drum H which revolves on its axis by the pull of the wire or
lath A, the wire or lath A being helically twisted by the revolution of the cradle
or frame J and arm F; the wire or lath A then passes over the reel L and through
the axis of the cogged wheels g², and g³, and over the reel N on to the storage
drum O which draws the twisted wire or lath A on to itself by its revolution
within the frame $, this motion being obtained by the medium of the band P
on the pulleys T and Q, the motion of the latter being imparted from the bevelled
gear R, which obtains its action from the revolution of the cradle or frame S. It
will be seen that the drum H revolves upon its axis within the revolving frame J,
and the drum O revolves upon its axis within the revolving frame S in the same
way.
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. A machine for imparting a helical twist to metal wire or laths, made sub-
stantially as described and set forth in the foregoing specification and the
accompanying drawings.
2. In a machine for imparting a helical twist to metal wire or laths, the use
of a twisting arm or tool as described and set forth.
3. In a machine for imparting a helical twist to metal wire or laths, the use of
a storage drum with provision for the even and regular winding of the twisted
wire thereon, as set forth.
Dated this 18th day of Svanst 1000
A. G. PRITCHARD,
Agent for Applicants, 21, Jeffreys Road, Clapham, S.W.