Improvements in or relating to Folding Mattresses.
Year: 1899

page_text: Date of Application, 8th Sept., 1899-Accepted, 14th Oct.,
1899
COMPLETE SPECIFICATION.
Improvements in or relating to Folding Mattresses.
I, OTTO GÖRAN WAHLENBERG, Upholsterer, of 53, Mastersamuelsgatan, Stock-
holm, in the Kingdom of Sweden, 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 relates to an improved construction of folding mattress provided
with a joint at the middle, for use in extensible or folding bedsteads, its object
being to provide room for the loose upper mattress within the folded bottom-
mattress. This is accomplished by so constructing the hinge of the latter, jointed
mattress that the halves of the said mattress when being folded together can
adjust themselves at the distance apart required for containing between them
the loose mattress or other bed-clothes.
The accompanying drawing shows in Figure 1 the mattress unfolded and open
and in Figure 2 folded with a loose mattress between its two parts.
Figure 3 shows a hinge in a cross-section.
The two halves A, A of the mattress, usually a spring mattress, are connected
as usual by two hinges, situated one at each side. One section or half B of the
hinge is rigidly secured to one of the halves of the mattress, while the other
shown in section in Figure 2, is made of several parts, in such a manner that the
inner part C, hinged to the part B, can slide in a sleeve D, which in its turn
can slide in a socket. E secured to the other half of the mattress, and extending
across the side of the latter. By means of slots and pins the distance is limited
to which the sleeve D can be extracted from E, as well as part C from D. When
the mattress is folded while the loose mattress F is lying upon it, the hinges are
expanded as shown in Figure 2, thus providing space for the mattress F, folded
double, between the halves A. Of course a single telescopic connection might
be used, in which case C would slide directly in E, this depending on the thick-
ness of the loose mattress and on the distance desired between the halves of the
doubled mattress A. It is evident that the said distance can be greater when
the double telescopic arrangement of the hinge, as shown in the drawing, is
used. Furthermore, both halves of the hinge might be constructed to act tele-
scopically. Alternatively the fixed socket E might be replaced by a number of
staples or guides. The construction described is evidently not materially altered
by making the part C in the shape of a sleeve embracing a guide attached to
the other half of the mattress, as shown in Figure 4 in a cross-section. The
sleeve D or socket E might moreover, be termed and constructed as a guide.
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:-
1. A folding mattress provided with a central hinge, one or both arms of the
hinge consisting of two or more telescopically-arranged parts of which the outer
part, which may be formed as a socket or guide, is fixed to the side of the mattress,
when the latter is folded, adjusting themselves at the distance apart required for

page_text: providing space between them for the likewise doubled upper mattress or other
bed-clothes, substantially as described.
2. The hinge construction for folding mattresses substantially as described and
illustrated in Figures 1, 2 and 3 or in Figure 4 of the accompanying drawing.
Dated this 8th day of September 1899.
BOULT, WADE & KILBURN,
Agents for the Applicant.