Improvements in the Arrangement and Construction of Sliding Windows adapted to be Closed in an Air-tight Manner.
Year: 1894

page_text: Date of Application, 7th Apr., 1894-Accepted, 6th Apr., 1895
COMPLETE SPECIFICATION.
Improvements in the Arrangement and Construction of Sliding
Windows adapted to be Closed in an Air-tight Manner.
I, JOHANNES EHRCKE, Joiner, of Schoneberg, near Berlin, in the Kingdom of
Prussia and German Empire, 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 :-
This invention relates to sliding windows adapted to be closed in an air-tight
manner as hereinafter explained.
The accompanying drawings illustrate a sliding window arranged constructed
combined and acting according to my present invention as follows:-
Fig. is a front elevation thereof.
Fig. 2 is a similar view of the side part of the window-with the cover board
removed.
and
Fig. 3 is a section on the line x-x of Fig. 1.
Figs. 4 to 7 show details of the closing tongue and of the guides for the latter,
Fig. 8 is a horizontal sectional view on line y-y Fig. 1.
The bar d (Fig. 6) is held in position and prevented from moving laterally in
the fixed frame a of the window by means of two guide pieces and is adapted to
be moved in a vertical direction by means of the eccentric or end e of a lever
arm mounted in the cover board which eccentric or lever end e is actuated by the
handle i.
The bar d has recesses into which engage corresponding projections or shoulders g
on the closing piece h.
This part has also the window frame to the left of the window (Fig. 1) and the
window sashes are formed with saw tooth-like faces in such a manner that the
saw-teeth come into engagement with one another and closely fit together when
the window is closed.
On moving the eccentric e (by the handle i Fig. 2) in an upward direction the
part h is forced in a lateral direction against the window sash by reason of the
mutual sliding movement of the inclined surfaces of the recesses f upon
the shoulders g and the said window sash is thereby at the same time pressed
tightly against the fixed guide bar k which is situated on the left hand window
frame and is in this way closed air-tight.
In order to secure the bar d and the closing piece in their relative positions
there are provided on the former two guide pieces which fit in similarly shaped
recesses m in the said part h.
In order to make the window sashes thoroughly air-tight as regards the external
air there are arranged at the abutting or adjacent edges of the two sashes and also
at the place of contact with the upper and lower frames angle irons u adapted to
enter corresponding grooves or similar irons such as v said irons being bevelled off
or otherwise adapted to wedge up the sashes to a certain extent.
The window sashes n are fitted with auxiliary hinged sashes o each of which is
glazed and is adapted to be closed by means of a handled inside-catch.
The upper window sash is fitted with an arrangement such that when the said
sash is being lowered a wire gauze blind is wound off to a corresponding extent
from a blind roller mounted in the upper frame. The wire gauze blind is guided in
its movement in the side frame of the window.

page_text: The upper frame is formed on its underside with a wide slot to allow of the wire
blind passing through same. The weights for balancing the window sashes are (or
may be) provided with rubber rings in order to prevent the disagreeable clattering
of the window when it is being opened and closed.
The device for tightly closing the sashes laterally may be equally well applied to
ordinary hinged windows (French windows) for closing the halves of the window in
an air-tight manner against each other.
The lateral closing movement may be effected by means of any equivalent or
suitable device instead of by an eccentric.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A sliding window adapted to be closed in an air-tight manner by the
arrangement and combination therewith of a bar such as d a closing device such
as h both arranged in the side frame of the window the part being formed with
bevelled shoulders which take into corresponding recesses f in the bar d and an
eccentric e to operate said bar d and press the closing device against the window
sashes so as to tightly close the window substantially in the manner and for the
purposes herein before described and illustrated by way of example in the drawings
hereunto annexed.
2. In the sliding window specified in Claim 1-the arrangement of angle irons
such as on the window sash or frame in combination and acting in conjunction
with grooves or similar angle-irons such as von the adjacent or abutting window
sash or frame substantially in the manner and for the purposes herein before set
forth.
3. In the sliding windows specified in Claim 1---the arrangement and combination
therewith of a wire gauze blind in the upper part of the window sash which wire
blind is wound off a blind roller situated in the top frame in proportion as the upper
window sash is lowered substantially as and for the purposes set forth.
4. The improved air-tight closing windows arranged constructed combined and
acting substantially in the manner and for the purposes herein before described and
illustrated in the drawings hereunto annexed.
Dated this 7th day of April 1894
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.