Improvement in and connected with Sash Windows.
Year: 1899

page_text: Date of Application, 23rd Mar., 1899-Accepted, 12th Aug., 1899
Improvement in and connected with Sash Windows.
We, JOHANNES STUMPF and CHRISTIAN LENZ, Inventors, of Berlin, Yorkstreet 22,
Germany, 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 present invention has reference to improvements in sash windows and
relates more especially to the kind of sash windows for which we have obtained
the British Patent No. 11216/95. According to the present invention the two
sliding sashes making up a window may be opened, closed and taken out of
the casing of the window in various ways. The lower sash being provided with
a counterweight or counterweights can be pushed upward behind the upper sash,
but can also be swung inwards about a horizontal axis at an angle of, about
90 deg. or it may completely be taken out of the casing for cleaning or other
purposes. The upper sash likewise can be swung inwardly and can also be
removed out of the casing of the window.
In order to make our invention more readily understood, we have illustrated it
on the accompanying sheets of drawings of which Fig. 1 shows an inner vertical
face of the window casing, Fig. 2 is a detail; Fig. 3 is a partial sectional elevation
of the casing D with the lower sash A partly drawn up. Fig. 4 is a front
elevation of the lower sash A; Fig. 5 is a front elevation of the upper sash B
and Fig. 6 shows the drum arrangement for winding up the cord for raising
the upper sash.
The lower sash A is provided on either vertical side with a metal strip a upon
which is secured a pin or trunnion b. A ring e, attached to the lower end of the
sash cord F, is placed over the said pin b. The sash cord runs over pulleys E
and is fastened to the counterweight C, as is clearly shown by the Fig. 3. The
metal strip a fits into the neck d of a toothed disc G, which is pressed against a
similar disc J by means of the dished springs H, the screw bolts e and the nuts f.
The disc J with its neck y is screwed fast to the window casing. The trunnions
or pins bare guided in grooves provided upon the inner faces of the pulley
stiles D, as is shown in Fig. 1; the said grooves running vertically from the
top to about midways of the height of the casing and from there slantingly out-
wards. In putting-in the lower sash A the pins 6 are introduced through the
transverse grooves o and upon the sash being pulled down, the metal strip a
enters the neck d of the disc G and the sash is held in the vertical position by
the two toothed discs G and J being pressed together as above described The
sash can now be swung inwards for cleaning or other purposes. This is accom-
plished by getting hold of the upper edge of the sash and by tipping it over when
the friction between the two toothed discs G and J will be overcome and the
pins or trunnions b will enter and slide within the curved grooves, the cords
running over the small pulleys y, one on either side of the casing. The sash
can be let go at any inclination up to 90 deg., as the friction between the two
discs G and J and the counterweight C will suffice to arrest its further swing
movement. For pressing the lower sash against the outer bead K a lever L is

page_text: engage
provided, pivotted at h upon the upper cross bar of the sash. A spring i tends
to bring the lever ends behind the catches provided upon either vertical face
of the casement. For disengaging the said lever L again, a cord m attached to
the lever is wound upon the rotary handle 7, by turning which the lever L will
be drawn clear of the catches k. Flat springs n secured to the beading K now
press the sash so far back that the ends of the lever L and the pins
the grooves h. The sash can now be raised and swung outwardly with its lower
end, the pins b sliding in the grooves and thus freeing the lower sash end.
Upon the sash being pulled down again, the ends of the lever L can be guided
outwards within the grooves o and the sash can then be removed out of the casing,
after the cord ring c has been taken off the pins b. The sash may also be
provided with hinged casements M, opening and closing in the ordinary manner,
as is shown in Fig. 4. The upper sash B is provided with spring bolts P which
engage in bore-holes in the casing 1) as shown in Fig. 1. These spring bolts
can be drawn back and secured in this position, so that the sash can then easily
be taken out. A lever N, similar to the lever L above described in connection
with the lower sash, is ordinarily set by the springs in such a way that it
engages the catches , t, the springs being secured to the upper cross bar of
the casing and the catches being secured to the sash. By oscillating the lever O,
by winding up the cord 1" upon the drum T as shown in Fig. 5, the lever N can
be released from the catches, and allow of the sash being tipped over under
the pressure of the flat springs W secured to outer beading K. To the upper
cross bar of the sash a cord S is secured at t and runs over pulleys R to the
drum T. This latter is secured to the axle X and is provided with teeth V upon
one face. A spring U tends to bring these teeth into cugagement with similar
teeth W³ provided upon the stationary journal cheek, in which the axle X is
axially movable. When the sets of teeth engage each other the drum cannot
be revolved, but when the axle X is axially shifted, compressing the spring U,
the sets of teeth are disengaged and the drum can now be revolved one way or
the other for lowering or lifting the upper sash. The sash can be swung out-
wards and downwards at an angle of almost 180 deg.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
1) In sash windows the arrangement of the grooves h, o andas and for
the purpose set forth.
2) In sash windows, means for swinging the lower sash outwardly substantially
as described with reference to the Figures 1, 2 and 3.
3) In sash windows means for securing the lower sash within the casing as
described with reference to Fig. 4.
4) In sush windows means for securing the upper sash within the casing as
described with reference to Fig. 5.
5) In sash windows the arrangement of hinged casements, such as M within
each individual sash frame, as described with reference to Fig. 4.
6) In sash windows means for raising or lowering the upper sash as described
with reference to Fig. 5.
7) In sash windows the arrangement of spring bolts, such as P, serving as
pivots for the sash as described with reference to Fig. 5.
FRANZ DICKMANN,
Agent for Applicants.