Improvements in Machinery for the Manufacture of Coiled Wire used in the Construction of Mattresses, Mats, and other similar Articles.
Year: 1890

page_text: Date of Application, 26th June, 1890-Accepted, 9th Aug., 1890
COMPLETE SPECIFICATION.
Improvements in Machinery for the Manufacture of Coiled Wire
used in the Construction of Mattresses, Mats, and other similar
Articles.
I MARSHALL ROBINSON of 20 Robert Street, Cheetham, Manchester, Cabinet Maker
do hereby declare the nature of my said invention and in what manner the same is
to be performed to be particularly described and ascertained in and by the following
statement:-
In the construction of the spiral wires employed in the manufacture of woven
wire mattresses mats and other similar woven wire articles, it has hitherto been found
necessary to pass the wire on emerging from the feed rollers through a separate inter-
mediate tube, mounted between the feed rollers and the spirally grooved die so as to
guide the wire continuously forwards into the spiral groove surrounding the central
spindle and in being forced through which the wire assumes the permanently spiral
form.
This tube so mounted has required to be adjusted with the greatest nicety and to be
separately supported and fixed in position and has thus materially increased the first
cost of the apparatus.
My improvements consist in dispensing with this guide tube and its fixing and in
extending the central spindle forwards and providing the same with a suitable
tapering extremity projecting between the feed rollers. A passage commencing with
its tapered point and emerging immediately opposite the spiral groove enables me to
guide the wire into the spiral groove with a degree of certainty and regularity hitherto
unattainable.
On the accompanying drawing Fig. 1 represents a side sectional view and Fig. 2 a
plan view of a machine for making spiral wires in accordance with my invention and
Figs. 3 and 4 are side and plan views respectively of my improved central spindle
and guide groove combined.
In all the views a a are the feed rollers between which the wire passes from the
creel in the ordinary manner b is the head stock or bracket supporting the central
spiral grooved spindle c affixed within the outer tube d and thus constituting the spiral
grooved die for imparting the twist to the wire in the usual manner.
My improvement consists in extending the front portion e of this spindle forward
and tapering its extremity (as seen in Figs. 3 and 4) so as to fit between the rollers
as illustrated more clearly in Fig. 1.
fis the grinding hole or passage for the wire which is formed through the extension e
commencing with its tapered point (where it receives the wire from between the feed
rollers a) and emerging immediately opposite the spiral groove g formed in the central
spindle c. This passage f (so arranged in the extension e and in one piece as the
latter is with the central spindle) constitutes a rigid guide for conveying the wire and
leading it with the greatest precision into the spiral forming groove g and in being
forced through which groove the wire assumes the desired permanently spiral form in
the usual manner.
Having thus particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is
In machines for the manufacture of wire spirals the employment of a spirally grooved
L

page_text: groove of such spindle substantially as and for the purposes herein before described and
illustrated on the accompanying drawing.
Dated this 24th day of June 1890.
JOHN G. WILSON,
Patent Office, 55, Market Street, Manchester, Agent for the Applicant.