Improvements in Spring Mattresses.
Year: 1890

page_text: Date of Application, 29th Apr., 1890 ·
Complete Specification Left, 29th Jan., 1891-Accepted, 7th Mar.. 1891
PROVISIONAL SPECIFICATION.
Improvements in Spring Mattresses.
We, JOHN EDGAR and GRAHAM CRERAR, of the firm of Edgar & Crerar,
18, Glassford Street, in the City of Glasgow, Bedding and Spring Mattress
Manufacturers, do hereby declare the nature of this invention to be as follows:-
This invention which relates to spring mattresses for beds or couches has for its
object to prevent or lessen liability to sagging of the wire web and to ensure
greater durability of the mattress. To that end we form the mattress with an
upper and a lower web of spring wire attached the one to the upper and the other
to the lower side of the usual framing and interpose between the webs a number of
helical or like springs so that the weight borne by the upper web is in part trans-
mitted through said springs to the lower web which thus serves as a support and
prevents sagging. In addition to the lower web or in lieu of it wooden or other
straps or boards may be used to carry the helical springs on which the upper
wire web bears.
Dated this Twenty-eighth day of April 1890.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in Spring Mattresses.
We, JOHN EDGAR and GRAHAM CREBAR, of the firm of Edgar and Crerar,
18, Glassford Street, in the City of Glasgow, Bedding and Spring Mattress
Manufacturers, 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:--
This invention which relates to spring mattresses for beds or couches has for its
object to prevent or lessen liability to sagging of the wire web and to ensure
greater durability of the mattress. To that end we form the mattress with an
upper and a lower web of spring wire attached the one to the upper and the other
to the lower side of the usual framing and interpose between the webs a number of
helical or like springs so that the weight borne by the upper web is in part trans-
mitted through said springs to the lower web which thus serves as a support and
prevents sagging, also making it much more elastic and luxuriant than a single web
mattress. In addition to the lower web or in lieu of it wooden or other straps or
boards may be used to carry the helical springs on which the upper wire web bears.
In the accompanying drawings which illustrate the invention Figure 1 is a
longitudinal vertical section showing a modification in which the mattress is forined
of an upper web A. and a lower web A¹ the two webs being preferably joined at
their sides or woven in the form of a sack and attached to the usual framing B.
Between the two webs are interposed a number of helical or spiral springs C, which
are attached to both webs. Figure 2 is a longitudinal vertical section and Figure 3
a plan showing a modification of the improved mattress in which a single web A. is
employed and is supported by helical or like springs C carried by transverse wooden
bearers D secured in or constituting part of the framing B. The springs C are in
this example held in position by strained wires or chains E attached to them and
to the framing as seen in Figure 3 in which the web is indicated as in part broken
away to show the supporting springs C and carriers D.

page_text: 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 spring mattress composed of two wire webs having interposed between
them a number of helical or other springs substantially as described.
2. A spring mattress composed of wire web supported by helical or other springs
carried by transverse bearers secured to or constituting part of the frame substan-
tially as described.
Dated this Twenty-eighth day of January 1891
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.