Year: 1899

page_text: improvements in Ma
I, OTTO LADEMANN, of 6, Molkenmarkt, Berlin, Germany, Manufacturer, do
hereby declare the nature of this invention to be as follows:-
A. mattress according to this invention is provided with transverse helical.
springs that can be tightened independently of one another.
This arrangement has the important advantage over mattresses provided with
longitudinal springs that the weight of the body is distributed over a larger
number of helical springs and that the springs that carry the middle of the
body that, is to say, the springs from which most is demanded-may be stronger
or be placed more closely together than the other springs. The resting body
will, therefore, be more uniformly supported in every part than is possible in
the case of mattresses with longitudinal springs, and the tension of the springs
can be adjusted so that the body takes up a perfectly horizontal position. The
springs may, therefore, be individually or several together, independently
tightened, so that the springs which become stretched in the course of time
can be subsequently adjusted so as to preserve an always constant position.
For hospital-beds mattresses according to this invention possess the further
advantage that springs supporting the head and leg portions may be adjusted
separately, and by the tightening or loosening of individual springs relief may
be given to the patient as he lies in bed, without its being necessary for him to
leave the bed.
-
The subsequent adjustment of the springs is effected by straps, .cords, or
screws. The straps or cords are advantageously arranged in the middle of the
springs, so that each spring consists of two portions connected together by the
straps or cords; but the straps or cords may be fixed at the ends of the springs.
In this case the straps or cords are advantageously fixed to the several springs
at opposite ends alternately.
According to one construction, the frame of such a mattress, which may be
of any desired material, as wood, or iron, comprises two longitudinal bearers
provided with downwardly projecting portions to which transverse ties are secured.
These ties may advantageously be divided to enable the width of the mattress
to be altered, the parts of each tie being joined together in a suitable manner
to make one piece, as by means of sleeves and binding screws.
Between the two longitudinal supports the helical springs are stretched at
small intervals. These springs may consist of two portions joined together by
cords or straps. This device enables the tension of each individual spring to
be accurately adjusted. If a spring becomes slack an even and uniformly springy
surface can be again obtained very quickly by tightening the slackened cord,
belt, strap, or the like.

page_text: I. OTTO LADEMANN, of 6, Molkenmarkt, Berlin, C, Germany, Manufacturer,
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:
-
A mattress according to this invention is provided with transverse helical
springs independent of one another.
This arrangement has the important advantage over mattresses provided with
longitudinal springs that the weight of the body is distributed over a larger
number of helical springs and that the springs that carry the middle of the
body that is to say, the springs from which most is demanded-may be stronger
or be placed more closely together than the other springs. The body resting
thereon will, therefore, be more uniformly supported in every part than is
possible in the case of mattresses with longitudinal springs or transverse springs
connected together by longitudinal strips or springs, and the tension of the
independent transverse springs can be adjusted so that the body takes up a
perfectly horizontal position. The springs may, therefore, be individually or
several together, independently tightened, so that the springs which become
stretched in the course of time can be subsequently adjusted so as to preserve
an always constant position.
For hospital-beds mattresses according to this invention possess the further
advantage that springs supporting the head and the legs may be adjusted
separately and by the tightening or loosening of individual springs relief may be
given to the patient as he lies in bed, without its being necessary for him to
leave the bed.
The subsequent adjustment of the springs is effected by straps, cords, or
screws. The straps or cords are advantageously arranged in the middle of the
springs, so that each spring consists of two portions connected together by a
strap or cord; but straps or cords may be fixed at the ends of the springs. In
this case the straps or cords are advantageously fixed to the several springs at
opposite ends alternately.
In the accompanying drawings a mattress of the kind described is shown in
perspective in Fig. 1. Fig. 2 shows a spring provided with a cord connexion,
and Fig. 3 one with a strap connexion.
As shown in Fig. 1 the frame of such a mattress, which may be of any desired
material, as wood or iron, comprises two longitudinal bearers a provided with
downwardly projecting portions 6 to which transverse ties e are secured. These
ties may advantageously be divided, as shown, to enable the width of the mattress
to be altered, the parts of each tie being joined together in a suitable manner
to make one piece, as by means of sleeves and binding-screws 7.
Between the two longitudinal bearers a the helical springs f are stretched at
small intervals. These springs may consist of two portions joined together by
cords (Fig. 2) or straps h (Fig. 3). This device enables the tension of each
individual spring to be accurately adjusted. If a spring becomes slack an even
and uniformly springy surface can be again obtained very quickly by tightening
the slackened cord, belt, strap, or the like.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is

page_text: 2. A mattress with transverse helical springs that can be tightened indepen-
dently of one another.
3. A mattress constructed and arranged as hereinbefore described with
reference to and shown in the accompanying drawings.
Dated this 12th day of February 1900.
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.