Ladder-shaped Safety-apparatus for Work to, be Performed Outside the Windows.
Year: 1896

page_text: Date of Application, 6th June, 1896
Complete Specification Left, 1st Feb., 1897-Accepted, 1st May, 1897
PROVISIONAL SPECIFICATION..
Ladder-shaped Safety-apparatus for Work to, be Performed Outside
the Windows.
1, FERDINAND SUBATZUS, Joiner, at Hamburg in Germany, Reuterstrasse 3,
do hereby declare the nature of this invention to be as follows:-
The invention to be described hereafter is to be applied whenever work is to be
performed outside the windows; as for instance when sun-shades are to be put up.
or to be taken off, when a house is to be painted, when sign boards, telephone
insulators etc. etc. are to be fixed. It will also prove useful for cleaning the
window-panes.
As to its construction the apparatus consists of a cross-bar located when the
apparatus is in use in a cramp applied to the wooden part of the window. After
fixing this bar a bow is connected with it by means of carabine-hooks. The width
of the bow corresponds to that of a ladder. The latter being connected with the
bow by means of carabine-hooks fitted to its top. After having performed all this.
the ladder is thrust so far out of the open window until the ends are supporting on
the window-sill. A sliding of the latter is prevented by cramps.
It is obvious that this apparatus affords perfect security to the person using it,
as its weight exercises a pressure on the absolutely firm sides of the window in such
a proportion as according to the lever-law to be reduced almost to ought with each
lower step.
Now as all the windows of houses have not the same width, this circumstance
has also been taken into account and therefore a coupling-box is bent at an angle
at its end to serve as guide for one part of the bar and to limit the movement of
a swelling. In the interior a rod is continued in reduced form in order to find a
new guide in a hollow-bar and herein a spring drives both parts of the bar continually
asunder.
Dated Hamburg. 4th of June 1896.
Ladder-shaped Safety-apparatus for Work to be Performed Outside
the Windows.
1, FERDINAND SUBATZUS, Joiner, resident of Hamburg, in Germany, Reuter-
strasse 3, 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 :-
The object of the present invention is represented in the accompanying

page_text: The invention to be described hereafter and represented in the drawing Fig. 1 is
to be applied whenever work is to be performed outside the windows as for instance
when sun-shades are to be put up or to be taken off, when a house is to be painted,
when sign boards, telephone insulators etc. etc. are to be fixed. It will also prove
useful for cleaning the window-panes.
As to its construction the apparatus consists of a cross-bar (a) located when the
apparatus is in use in cramps (b), applied to the wooden part of the window.
After fixing this bar the iron-bow (c) is connected with it by means of the spring-
hooks (d). The width of the bow (c) corresponds to that of the ladder (e), the latter
being connected with the bow (c) by means of the spring-hooks (f) fitted to its top.
After having performed all this, the ladder is thrust so far out of the open window
until the supports (9) be flat on the window-sill. A sliding of the latter is prevented
by their cramps. Fig. 1 shows the apparatus when ready for use. The dotted line (s)
shows the opened window.
With a view to give solidity to the whole device, the bars (i) moveable in the
hinges (h), have been applied, the forking (k) of the bars sustaining the bow (c), and
pressing against the cross piece of the window from without. The bars (i) are fixed
by the moveable bifurcated bars (j).
It is obvious that this apparatus affords perfect security to the person using it,
as its weight exercises a pressure on the absolutely firm sides of the window in
such a proportion as according to the lever-law to be reduced almost to ought with
each lower step.
The cramps (6) are common loops and as represented in Fig. 2 holding the hook-
shaped ends of the bar (A). The har (A) consists of two hollow tubes of different
diameter sliding one in the other, because the windows of houses have not all the
same width and this circumstance was also to be taken into account.
The outer bar (A) being a guide for the inner bar (A¹) this arrangement allows
of a telescopical lengthening or shortening according to the width of the window.
The same figure shows the hook-shaped end of the bar (A 1) the hook being nearly
a complete ring to prevent it from getting loose. The end of the bar (A) on the
contrary cannot be a ring-shaped hoop, as in this case a closing would be impossible.
This end is for this reason a common hook secured in its loop by a moveable
L-shaped staple-plate (m) represented in Fig. 3 in lateral view.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :
A ladder-shaped safety-apparatus for works to be performed upon the outside of
a house, which for an absolute security's sake is held fast by cross-bars (A) sliding
one in another lengthening and shortening according for the width of the windows,
fastened on the sides of the window by means of loops (6) the ladder being fixed by
means of books, upon a bow (c), connected with the cross-bar, the whole apparatus
protruding from out of the window and finding its support on the window-sill, all
as described and set forth in the foregoing specification and shown in the annexed
drawings.
Dated, Hamburg, 29th of January 1897.
FERDINAND SUBATZUS,
By Carl O. Lange,
Agent.