Protective Lattice for Windows.
Year: 1895

page_text: Date of Application, 29th Mar., 1895-Accepted, 30th Nov.. 1895
Protective Lattice for Windows.
1, JULIUS GRAEF, Workmaster of Stolberg, in the Province of Rhineland and
Kingdom of Prussia 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 :—
At first
The frequent accidents which take place year by year by children falling from
high and open windows, have repeatedly and long since made people feel the want
of some preventive or protective means against these said occurrences.
sight a lattice-work secured on the outside in front of the window appears to be
the most natural way of attaining this end. But why do we still find such lattices
hardly anywhere in use? Because one always only thought about lattices, which
are fastened to the outer window-frame i.e. to the masonry.
But great difficulties and drawbacks were connected herewith. The attachment
to the masonry had either to be made at the very beginning, by building in the
necessary hooks and cramps simultaneously with the erection of the house, or
otherwise much work and great expense was caused later on in driving in the
necessary iron parts. This, under the circumstances, might even necessitate the
erection of scaffolding-at any rate, the paint plaster and the masonry itself of
the house were injured.
Besides, lattices fastened in such a manner, could, if it became desirable or
necessary later on, only be removed with much difficulty and at a great expense.
In any case it would also be necessary for the tenants of the house to obtain the
permission of the landlord or even of the police, for the putting on or removal of
the lattices.
My arrangement of the protective lattices is destined to do away with all these
difficulties and drawbacks.
In my invention the lattice is arranged in such a manner, that it is secured to
the wings of the window and only guided on the window-sill.
This arrangement is shown in annexed drawing viz. in Fig. 1 in a horizontal
section through lattice, window-sashes frame and masonry, in Fig. 2 in a vertical
section through the lattice with view of attachment to the window-sashes, while
Figs. 3 and 4 represent the guide of the lattice on the window-sill in upper and
side-view.
The lattice G consists, as usual, of perpendicular bars a, which are connected by
cross-bars with each other. Of these latter bars one of round, half-round, tube-
shaped and similar section, forms above on the bars a, so to say, the hand-rail,
while the second c of half-round, flat etc. section at the lower end of the bars a,
forms the foot-rail. The two extreme, lateral bars a, a, are each secured at two
points by attachment cross-pieces dd to the wood of the window-sash. These
cross-pieces d enclose at the one end, so as to be able to turn, the bar a₁ and are
movably connected at the other end by means of pin, screw or bolt to one or two
angle-loops or a fork-piece e, the latter of which is secured by means of wooden
screws to the wood H of the window-sash, as near as possible to the fulcrum of the
sashes.
If the sashes are opened, the lattice G follows this motion up to a certain point
and moves somewhat nearer to the interior of the room, while on the window being
shut it again moves more toward the outside. In order that during this motion
the lattice may not strike below against the window-frame-wood R, which usually
projects further on the window-sill B, the bars a are carried round towards the

page_text: front at the lower end, so that the rail c also does not lie perpendicularly under the
rail b, but more towards the front (towards the street).
The motion of the lattice as well as the circumstance, that the cross-pieces d d,
though holding it to the window still do not support it, make it necessary to
specially guide the lattice below on the window-sill B, in order that the latter may
not on the one hand offer to great a resistance to the motion of the lattice and
therefore to that of the window-sashes, and on the other hand, that it be not
injured by the iron rubbing and sliding on it. This guide F, drawn in Figs. 3
and 4, consists of a particular piece of iron something like a double connected U,
preferably round-iron or thick wire, which encloses in each of the two bends a
bar a of the lattice, when however the one leg g of each lies below, the other h
above the ground rail c of the lattice, so that the latter is also enclosed. c thus
slides on the legs g 9.
h are bent round laterally and secured by means of
screws i i to the part R of the frame.
The ends of the legs
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 :
Protective lattice to prevent children from falling out of open windows, dis-
tinguished by the attachment to the wood of the window-sashes by means of the
moveable cross-pieces d and the parts e, and the guide on the window-sill B, made
by the bent iron F screwed to the lower window frame-wood R.
Dated this 20th day of March 1895.
For JULIUS GRAEF,
Bernh. Brockhues.