MENTS IN METALLIC SPRINGS USED IN UPHOLSTERY
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by the said John Pring at the Office of
the Commissioners of Patents on the 17th April 1883.
.
JOHN PRING of Sandbach in the County of Chester, Wire Worker,
MENTS IN METALLIC SPRINGS USED IN UPHOLSTERY,"
"IMPROVE-
Ordinary metal springs used in Upholstery, are helical springs with enlarging
coils from the middle part to the two ends, and each end of the wire is bent to
grasp the last coil-The bent ends of the wire frequently move and slide upon the
coil which they are made to grasp and then the coils are liable to come in contact
with and strike against each other in a disagreeable manner when the sofa or other
article to which they are applied is in use.
My invention consists in forming a bend or indent or other equivalent arrange-
ment in the coil of wire to be grasped by the bent end of the wire of the spring so
that it cannot move from the position in which it is made to grasp or take hold of
the coil.
The bend or indent is or may be made either vertically or horizontally in relation
to the axis of the spring.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Pring in the Great Seal Patent Office on the 17th October
1883.
JOHN PRING, of Sandbach in the County of Chester, Wire Worker
MENTS IN METALLIC SPRINGS USED IN UPHOLSTERY "
"IMPROVE-
Ordinary motallic springs used in upholstery for instance Sofa, Chair and
Mattress Springs are helical springs with enlarging coils from the middle part to
the two ends and each end of the wire is bent to grasp the last coil-The bent ends of
the wire frequently move and slide upon the coil which they are made to grasp
and then the coils are liable to come in contact with and strike against each other in a
disagreable manner when the sofa or other article to which they are applied is in
use, moreover this movement of the bent ends and the consequent rubbing action
against the canvas or other covering material causes holes to be worn therein.
On the accompanying drawing Fig 1 represents a front view and Fig 2 a plan of
a spring embodying my improvements which I will now proceed to explain with
the assistance of the letters of reference marked on both views.
My invention consists in forming a bend or indent or other equivalent arrange-
ment (a) in the coil of wire to be grasped as illustrated by the bent end (b) of the
wire of the spring, so that it cannot move from the position in which it is made to
grasp or take hold of the coil and thus obviate the disadvantages herein before
expressed.
The bend or indent (a) which is the essential feature of my invention and which
is applied to both extremities or ends of the spring is or may be made either
vertically or horizontally in relation to the axis of the spring-or in other words-
instead of being bent outwards as illustrated in the drawing it may be bent
inwards or it may be bent upwards or downwards all of which I should consider
to be modifications of my invention.
Having thus particularly described and ascertained the nature of this my said
invention together with the best methods with which I am acquainted for
carrying the same into practical effect I wish it to be understood that I claim
as my invention and desire to secure by Letters Patent in springs used in
upholstery :-
Forming a bend or indent in the coil to receive the bent end or extremity of the
wire of the spring substantially as and for the purpose herein before described and
illustrated on the accompanying drawing.
In witness whereof I the said John Pring have hereunto set my hand and seal
this 15th day of October in the year of our Lord, One Thousand Eight Hundred
and Eighty three