Improvements in Devices for Opening and Closing Windows.
Year: 1892

page_text: Date of Application, 22nd Mar., 1892-Accepted, 14th May, 1892
COMPLETE SPECIFICATION.
Improvements in Devices for Opening and Closing Windows.
A communication from CARL. LEBERECHT BOEHME, of 68 Pfotenhauerstrasse,
Dresden Altstadt, Saxony, in the German Empire, Locksmith.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Member of the Institute of Mechanical Engineers, 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 this invention is to provide a device whereby an unskilled person
may readily open or close from below the upper leaves or sashes of windows no
matter whether they swing on vertical or horizontal hinges.
This ventilating
arrangement is mainly applicable to single or double casement windows, and in the
case of double windows, the two ventilating frames or leaves may be so arranged
that in closing or opening the inner one engages the outer one, or vice versa.
The accompanying drawings show some of the forms in which this invention may
be carried out.
Figs. 1 and 2 are respectively a sectional side elevation and a front elevation of
part of a single window the upper frame or leaf a of which is adapted to swing upon
horizontal pivots or hinges bb.
Figs. 3 and 4 are corresponding views of a similar window, but in which the
upper part or leaf c is arranged to turn on vertical hinges.
Fig. 5 is a front view and Fig. 6 a sectional elevation of a double or folding
window with the upper leaf arranged to swing upon a horizontal pivot.
In the arrangement shown in Figs. 1 and 2 a rod or spindle d is horizontally
arranged upon the frame and carries an arme with which engages a link. At the
opposite end of the rod d there is another arın y connected with the rod h. When
this rod is raised, the arm e by means of the link draws the leaf a of the window
towards the frame or shaft, when moved in the opposite direction, it causes the said
leaf to move away from the frame and consequently the window to be opened for
ventilating.
In the arrangement shown in Figs. 3 and 4 the link is replaced by a slide i
provided upon the leaf a of the window and in which is adapted to slide the arm e.
By operating the rod the leaf swinging on vertical hinges opened or closed as
required. In Figs. 5 and 6 a slide is also employed for operating the outer leaf &.
The inner leaf is connected with the outer leaf k by means of a link a interposed
between the slide and a bracket or eye m attached to k¹.
The operating device now to be described applies to all these arrangements.
With the end of the rod is connected a lever o secured to the window-frame. By
moving this lever either into the upward or the downward position, the rod his
correspondingly raised or lowered. In both cases there is a dead point to overcome
so that if the rod had any tendency to shift its position, it would first have to make
a movement in the opposite direction. As however the distance between the
spindled and the pivot or fulcrum of the lever o is so proportioned that in either
terminal position the link or rod is somewhat strained, any danger of an accidental
shifting of the parts from the desired position, either by the weight of the leaves or
sashes or under the pressure of the wind, is effectively avoided. If preferred the same
purpose may be attained by screwing or otherwise fixing the lever in the extreme
positions against its bracket or bearing, or the rod may he secured to the window-
sash direct, and the lever omitted.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion, as communicated to me by my foreign correspondent, and in what manner the
same is to be performed, I declare that what I claim is,
-
1. An arrangement for opening and closing the upper leaves of windows
characterized by an arm such as e pivotted to the window-frame which by means of
a link or by means of a slot or slide or moves the leaf, and itself receives
motion from a second arm g mounted on the same shaft or pivot d and operated
from below by means of a rod the arrangement being such that in double windows
one swinging window-leaf moves the other in opening or closing by means of a
link the whole substantially as described and illustrated in the accompanying
drawings.
2. A device for securing in position the mechanism referred to in the preceding
claim consisting of a lever o engaging with the rod substantially as and for the
purpose described and illustrated in the accompanying drawings.
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استن
CYL 1000
W. P. THOMPSON & BOULT,
Agents for the Applicant.
W. P. THOMPSON & BOULT,
Agents for the Applicant.