Improvements in Mattresses.
Year: 1897

page_text: Date of Application, 11th Aug., 1897-Accepted, 11th Sept., 1897
Communicated from abroad by OrrOMAR STEINER of Omerson, hear
berg, Silesia, in the Empire of Germany, Manufacturer.]
Improvements in Mattresses.
I, CHARLES JUNGE, of Lincoln Chambers, 75 Chancery Lane, London, W.C.,
Consulting Engineer, do hereby declare the nature of this invention and in ▾ hat
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:
-
This invention relates to adjustable mattresses.
The adjustable mattresses heretofore employed are very complicated and ex-
pensive, and are moreover difficult to manipulate, inasmuch as the adjustment is
troublesome.
A mattress made according to the aforesaid invention can be adjusted by
changing only the position of the head-rest, the latter being connected with the
lower ends of the mattress springs by means of a balance-like mechanism.
In the accompanying drawing hereinafter referred to several arrangements or
modifications embodying my invention are represented.
Figure 1 shows a plan of the mattress;
Figures 2, 3, 4 and 5 are longitudinal sections of the same.
Figure 6 is a plan showing a modified arrangement;
Figures 7, 8, 9 and 10 illustrate longitudinal sections of the same.
Figure 7 shows a rod having ends which form pivots.
In the arrangement shown in Figures 1 to 5, the head-rest g is provided with
two horizontal pivots g', Figure 2, engaging with the sides of the main frame a.
Pins arranged approximately in the middle of the sides of the head-rest g serve
for coupling the head-rest to rods h¹, passing into tubes h, with which they form
stays. The length of the stays h h¹ can be varied by loosening the thumb screws i
designed to fix them in the tubes h. The lower ends of these tubes h are connected
by links 2 with the arms c¹ of two double-armed levers c¹ c². Both levers care
supported by pivots b, Figures 1 and 2, fixed to the sides of the main frame a.
The arms of the levers c¹² support a frame d forming the lower abutment for
the helicoidal springs e adapted to act upon the net-work f or the like on which
the bedding is to be laid. Accordingly the body of the person lying in the bed
will exert a downward pressure on the arms c² of the levers c¹³, thereby compelling
the arms c to press the head-rest g upwards. The head-rest is prevented from
moving in this direction by straps k secured to the main-frame a. The straps k
are provided with a row of holes k¹, buttons m being fastened to the head-rest g.
As will be seen from Figures 2 to 5, the tension of the springs e may be changed,
either by varying the length of the stays h h', Figures 2 and 3, or by varying the
effective length of the straps k, Figures 4 and 5. The greatest tension of the
springs e is produced by lengthening the stays h h as much as possible, and using
at the same time the hole k which is nearest to the frame a.
As ilustrated in Figure 8, the arms c¹ of the levers c¹ c² may form the sides of

page_text: the head-rest g. By such an arrangement the stays h h¹ are dispensed with.
Under these circumstances a second adjustment is rendered possible as shown in
Figure 7, that is to say, the pivots constituting the fulcrums or centres of oscilla-
tion of the levers c¹², are enabled to be shifted in the horizontal direction. For
this purpose the parts of the levers c¹ c³, situated between the parts. c and e,
are provided on their under side with notches c of a semi-cylindrical shape. Below
the parts bars o are fixed to the frame a and are provided with notches of on
their upper side, these notches being likewise of a semi-cylindrical shape. Two
such opposite notches and o¹ form a hole or cavity serving for the reception of
pivots B at the ends of the rod B as shown in Figure 7. Therefore the relation
existing between the arms c¹ and ² as regards their length will be changed by
placing the pivots B¹ into one or the other of the holes or cavities co'. Figure 9
illustrates, together with Figure 7, how the adjustment is effected by the strap k
while the pivots B₁ are held in the holes or cavities et o' which are situated in
proximity to the springs e. Similarly the adjustment effected by means of the
strap k is shown in Figures 8 and 10.
Whereas in the arrangement or modification represented in Figures 1 to 5
there are three series of springs e, the upper end of which is held in position by
the net-work f, two series of springs e are provided in the modification shown in
Figures 6 to 10.
Between the opposite upper ends of these springs horizontal springs 1 are
interposed.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, as communicated to
me by my foreign correspondent, I declare that what I claim is:-
In adjustable mattresses the arrangement of a balance-like mechanism between
the head-rest and the supporting springs e of the mattress, substantially as
and for the purpose set forth.
D
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