Improvements in Window Opening and Closing Apparatus.
Year: 1894

page_text: Date of Application. 14th June, 1894
Complete Specification Left, 30th June, 1894-Accepted, 11th Aug., 1894
PROVISIONAL SPECIFICATION.
Improvements in Window Opening and Closing Apparatus.
I, GEORG MÜLLER, of 5 Blumenstrasse, Erfurt, Thuringia, in the Empire of
Germany, Foreman, do hereby declare the nature of this invention to be as
follows:-
This invention relates to apparatus for opening and closing window-sashes that
are adapted to be opened by being turned down about a horizontal axis by means
of hinges on the lower edge of the sash. This apparatus has the advantage that
the sash can be opened, closed, or adjusted in any desired position by merely
operating two cords.
In the accompanying drawings,
Figure 1 shows a front elevation of a sash and frame provided with apparatus
according to this invention;
Fig. 2 a section on the line I I, II of Fig. 1, and
Fig. 3 a section taken in a similar position to Fig. 2, the sash being represented
wide open;
Figs. 4 and 5 show to a larger scale an elevation and a vertical cross section
respectively of a portion of the apparatus ;
Figs. 6 and 7 show corresponding views to Figs. 4 and 5 of a slightly modified
arrangement.
Referring to Figs. 1 to 5 inclusive, the sash a, which is adapted to turn on
hinges b, carries in the middle or at one side of its upper part the closing and
adjusting device C.
To the fixed frame a' there is fixed, by means of a ring-screw d or in any other
suitable manner, a chain e which passes over a chain-pinion f mounted on the upper
part of the sash a and also over a pulley g mounted on the lower part of the sash,
to the end of the chain e there is attached a cord k which is suitably guided by
means of a pulley i.
There is also provided a latch / which is adapted to turn on a pin m and is acted
on by a spring n in such a manner that it has a tendency to move behind a catch o
fixed on the frame a'. To the latch there is connected at p a cord q which is
guided by suitably arranged eyes q', q' along the frame
a ; the cord 9 may
if desired
be attached at its lower end to the lower end of the cord k. The chain-pinion f
is prevented from rotating in the direction of the hands of a clock (when seen as
in Figs. 2, 5, and 7) by a locking-bolt r which is pivoted at r to a lock-plate s, and
is formed with a projecting incline. The bolt is constantly pressed outwardly
by a spring t in such a manner that the upper end of the spring-bolt r normally
engages in one of the spaces between the teeth of the chain-pinion f so as to
prevent the chain-pinion from rotating.
The latch is provided with a projection which is adapted to bear against the
incline of the locking-bolt r; so that when the latch is caused by a pull on the
cord g to become disengaged from the catch o, the locking-bolt r is simultaneously
rotated by means of the projection l' in such a manner as to cause its upper end to
remove from the tooth-space of the chain-pinion and leave the chain-pinion free
to rotate. The latch / having thus been freed from the catch o, the sash a opens,
turning down into the position shown in Fig. 3.
In order to close the sash to any desired extent, it is merely necessary to pull
the cord k, thus drawing the chain e and causing the pinion to rotate in the
direction opposite to that of the hands of a clock and thus to push back the
spring-locking-bolt r. On releasing the cord k, the sash remains in the position into

page_text: which it has been brought by pulling the cord k, because the locking-bolt r moves
into one of the tooth-spaces of the chain-pinion f.
The only differences between the arrangement illustrated in Figs. 6 & 7 and that
shown in Figs. 4 & 5 are that a lock-plate u is provided for covering the latch 1, its
spring, and the locking-bolt r, so that the interior of the apparatus is not visible,
and that a flat spring n¹ pressing upon the projection l' of the latch 1, is employed
as a locking-spring.
COMPLETE SPECIFICATION.
Improvements in Window Opening and Closing Apparatus.
I, GEORG MÜLLER, of 5 Blumenstrasse, Erfurt, Thuringia, in the Einpire of
Germany, Foreman, 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 apparatus for opening and closing window-sashes that
are adapted to be opened by being turned down about a horizontal axis by means
of hinges on their lower edges. The improved apparatus has the advantage that
the sash can be readily opened, closed, or adjusted in any desired position by merely
operating two cords.
In the drawings left with my Provisional Specification
Fig. 1 shows a front elevation of a sash and frame provided with apparatus
according to this invention;
Fig. 2 a section on the line II, II of Fig. 1; and
Fig. 3 a section taken in a similar position to Fig. 2, but the sash being represented
wide open;
Figs. 4 and 5 show to a larger scale an elevation and a vertical cross section
respectively, of a portion of the apparatus ;
Figs. 6 and 7 show corresponding views to Figs. 4 and 5 of a slightly modified.
arrangement.
Referring to Figs. 1 to 5 inclusive, the sash a, which is adapted to turn on
hinges 6, carries in the middle or at one side of its upper part the closing and
adjusting device c. To the fixed frame a' there is fixed, by suitable means such as
a screw ring d, a chain e which passes over a toothed chain-pinion f mounted on
the upper part of the sash a and also around a pulley g mounted on the lower part
of the sash, and to the end of the chain e there is attached a cord k which is
suitably guided by means of a pulley i.
The closing and adjusting device c comprises a latch mounted to turn on
a pin m and acted on by a spring n in such a manner that it has a tendency to
move behind a catch o fixed on the frame a¹. To the latch there is connected
at p a cord g which is guided by suitably arranged eyes q', q' along the sash a.
The cord 9 may, if desired, be attached at its lower end to the lower end of the
cord k. The chain-pinion f is prevented from rotating in the direction of the hands
of a clock (when seen as in Figs. 2 and 5) by a locking-bolt r which is pivoted at r¹
to a lock-plates, and is formed with an inclined portion. The bolt r is constantly
pressed outwardly by a spring t in such a manner that the upper end of the spring-
bolt r normally engages in one of the spaces between the teeth of the chain pinion f
80 as to prevent the said pulley from rotating.
The latch is provided with a projection which is adapted to bear against
the incline portion of the locking bolt r, so that when the latch is caused by a

page_text: pull on the cord 9 to become disengaged from the catch o, the locking bolt is
simultaneously turned upon its pin by means of the projection of the latch in
such a manner as to cause its upper end to be removed from the recess in the chain
pinion in which it formerly rested and leave the said chain-pinion free to rotate.
The latch having thus been freed from the catch o the sash a opens, by gravity,
turning down into the position shown in Fig. 3.
In order to close the sash to any desired extent, it is merely necessary to pull the
cord k, thus drawing the chain e and causing the pinion f to rotate in the direction
opposite to that of the hands of a clock, the spring-locking-bolt
yielding to
permit the said pinion to freely turn in this direction. On releasing the cord k, the
sash remains in the position into which it has been brought by pulling such cord,
because the locking-bolt will then have entered one of the recesses between the
teeth of the chain-pinion f.
+
The only differences between the arrangement illustrated in Figs. 6 and 7, and
that shown in Figs. 1 to 5 inclusive, are that a lock-plate u is provided for covering
the latch and its spring, and also the locking-bolt in such a manner as to conceal
from view the interior of the apparatus, and that a flat spring n¹ pressing upon
the projection of the latch 1, is employed as a locking-spring.
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 :-
1. Apparatus for opening, closing and adjusting window sashes of the kind
herein referred to, comprising a spring latch 1, toothed pinion f, and locking-bolt r
with inclined part adapted to be mounted on the sash, and a chain adapted to be
connected at one end to the window frame and to work over the said tooth pinion,
the arrangement being such that normally the latch tends to engage with a catch
fixed on the window frame, and the locking bolt tends to prevent rotation of the
toothed pinion and prevent movement of the sash, but upon pulling the latch by
means of a suitably guided cord it will become released from the fixed catch and
will cause the locking bolt to release the toothed pinion and allow the sash to be
opened, and upon pulling on the said chain the sash will be raised and more
or less closed, substantially as herein before described with reference to and shown
in the drawings.
2. The improved apparatus for opening, closing and adjusting window sashes,
constructed arranged and operating as herein before described with reference
to and shown in Figs. 1 to 5 inclusive, or modified according to Figs. 6 and 7 of
the drawings.