Improvements in or relating to Spring Mattresses.
Year: 1894

page_text: Date of Application, 12th Apr.. 1894-Accepted, 1st Dec., 1894
COMPLETE SPECIFICATION.
Improvements in or relating to Spring Mattresses.
1, FERDINAND POLITZER, Manufacturer, of Miskolcz, Hungary, 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:-
Ordinary mattresses have the drawback, that they require many wire springs
and are therefore expensive, they also require a strong covering, to prevent it from
being damaged by the springs; besides they do not afford the desired comfort, on
account of the unequal pressure of the springs produced by the unequal load.
The present invention has for its object, to produce a sanitary spring mattress
which combines simplicity of construction and cheapness of manufacture, with
comfort and sanitary requirements.
In the accompanying drawings,
Fig. 1 is a vertical section and
Fig. 2 a horizontal section of a spring mattress embodying my invention.
The improved spring mattress chiefly comprises two rectangular frames of the
same size, each being composed of two strong longitudinal beams A, preferably
made of wood, and two thin transverse beams a. In the longitudinal beams of the
upper frame, there are fixed 6 iron posts B, provided at the lower ends b with
screw-threads. On each of the said posts is coiled a helical springs placed between
two iron washers p p.
As shown by the drawing, the longitudinal beams of the lower frame have
vertical perforations, through which pass the posts B provided with screw nuts m,
and which are wide enough for allowing the lower frame to move up and down
along the said posts.
The rectangular framework or skeleton constructed as described is covered on
the top and sides by a sheet of canvas or other suitable fabric M, strengthened at
the edges with leather l, and fixed to the lower frame.
To the top of the sheet of canvas or other strong fabric M is fixed the mattress
proper, which may be made of flannel, silk or other suitable material and lined or
filled with wadding, horsehair, or other material commonly used for such a
purpose.
This spring mattress should be mounted in the bed in such a manner, that the
iron posts or screw spindles B do not rest with their ends upon any fixed support,
but are allowed to descend freely under the influence of pressure. This may be
effected by mounting the lower frame on four parallel bars, so that the two outer
bars support the ends of the longitudinal beams, while the two intermediate bars
support the said beams between the posts B.
In this manner, the lower frame remains stationary when in use, while the upper
frame is allowed to descend by compressing the springs s.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a spring mattress, a frame work or skeleton comprising in its construction
two rectangular frames A, a, iron posts or screw spindles B connecting the two
frames, the said posts being fixed in the upper frame and adapted to slide up and
down in the lower frame, and springs coiled on the said posts or screw spindles,
substantially as described.

page_text: 2. A spring mattress comprising in its construction an upper and a lower
rectangular frame, vertical connecting posts, springs, and an outside cover or
mattress proper fixed to the lower frame, the whole being constructed and adapted
to operate substantially as described.