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Патент USA US2113877

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Ap' ' '12, 1938.
Filed Sept. 11, 1935
2 Sheets-Shed l
, ,. 4
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April 12, 1938.
' Filed Sept. 11, 1935
2 Sheets-Sheet 2
Mam chm? 031x’.
Patented Apr. 12, 1938
2,113,877 '
Valentine George Crittall and Walter Cecil By
water, Braintree, England, assignors to The
.Crittall Manufacturing Company, Limited,
Braintrce, England
Application September 11, 1935, Serial No. 40,180
In Great Britain October 12, 1934
5 Claims.
(Cl. 292—262)
This invention relates to improvements in
metal casement windows‘and more particularly
On the window frame A is a bracket D, to
to an improved construction of stay or like ?tting
which is pivoted one end of a swinging arm or '7
It is the present practice in metal’ casement
windows to attach the guide bar for the swinging
link E of the stay. The other end of the swing
ing arm carries‘ a clamp indicated generally at F
and which is in sliding engagement with a guide
arm or link of the stay by securing the bar at its
‘ ends to the metal framework or the window, but
v this construction has certain practical disad
window B which is hinged to open outwardly
about a centre C (see Figure 2).
‘According to ‘the invention in a metal case
ment window having, ?xed and moving frame
members provided with inner and outer co-op
bar I on window B.
The essential feature of this invention consists I
in a construction in which the guide bar forms 16
a single unit with the metal section of the window
and in the arrangement shown in Figures 1-3
the guide bar consists of a metal strip I attached
by riveting to the vertical ?ange of the window _
erating ?anges, the guide. bar for the stay arm section. The guide bar strip comprises an over- '
15 comprises a rail provided with a retaining rib_ hanging rail 3 terminating in a retaining rib 4
and formed in one with or united throughout its which preferably as shown ‘is of bulbous sec
length such as by welding or riveting to one of the
tion. The clamp. embraces the rib along which
frame members,.the other frame member sup
is slidable.
porting the stay arm which carries a clamp it In
the construction of Figure 4 the guide bar "20
adapted for sliding engagement with the retain
2 ing ribof the rail.
' ,In a preferred arrangement the metal section
of the moving frame of'the window along its
lower edge is formed with an inwardly extend
ing horizontal flange'constituting the guide rail
and along which flange. the window clamp carried
on the swinging arm is slidable.‘
The guide rail, or the metal strip forming the
rail and which is attached by riveting or weld
ing to the window section is preferably formed
3 c. at its extremity with a rib of bulbous section.
A further feature of ‘the invention consists in
the manner of attaching the securing clamp to ,
the stay arm by means of its tightening pin, since
by anchoring the pin to the arm, it being under
35 stood that the head of the pin engages behindthe
arm, when the clamp is tightened the arm will
be‘rigidly braced by the clamp to the guide rail.
The invention is illustrated in the accompany
ing drawings in which Figures 1 and 2 are re
spectively a part elevation and plan view of a
metal casement window having a stay ?tting in
accordance with the invention;
Figure 3 is a transverse sectional view (on an
enlarged scale) and showing the clamping mech
Figure 4 is a transverse sectional elevation of
an alternative construction of window section;
Figure 5 is a transverse sectional elevation
showing a further embodiment of the invention in
which the window is constructed to open inward
Referring to the accompanying drawings there
is shown a metal casement window comprising a
?xed window frame A and a moving frame or
instead of being attached throughout its length
to the section B forms an integral part of the
metal section B of the window and for this pur
pose the vertical flange indicated at 5 of the
window section is provided with an overhanging "a
rail portion 3’ having the rib ll. As shown it is
preferable to fit the rib :2 with a liner 4’ of brass
or other non-rustable material and where the
guide bar is attached such as by riveting to the
window section as in Figures 1-3, the entire bar
may be. formed of brass or other non-rustable
According to a further feature of the invention
the window securing lamp ‘F, which is formed in
two parts 5 and l, is anchored to the swinging arm
E of the stay with the result that when the clamp
is tightened in addition to its functioning to ?x
the window by gripping'the guide bar it will also
clamp together the guide bar and swinging arm
and thus prevent any play- therebetween. The 40
clamping members 6 and l‘ are each formed with
a‘ rib-embracing recess shaped to embrace par
tially and circumierentially the guide bar rib ll,
thereby providing a large surface area for fric
tional'engagement of the clamping members 6
and ‘i with the rib 5;.
It will be appreciated that by eliminating play, .
between the guide bar and the swinging arm,
when the window is locked at any opening, the
bar and arms will be rigid with one another. This
is an important advantage especially when the
window is set at a small window opening, since '
in the. normal construction there is a tendency of .
its shutting of its own accord, due to play at the
pivotal points at each end of the arm, Whereas 55
with the clamp of this invention, play can only
occur at the pivot between the swinging arm and
the window frame.
For this purpose the two parts 6 and ‘I of the
clamp are secured to each other by a screw
threaded stud 8, the head or one end 9 of which is
anchored to the stay arm E, its other end pro
jecting above the parts of the clamp to receive
a thumb or wing nut Ill. The two parts of the
clamp are grooved to correspond with the cross
section of the rib 4 of the guide bar and in addi
tion are respectively provided with a locating rib
and groove indicated at I I. The thumb nut may
be secured on the stud 8 by means of a screwed pin
Referring now to Figure 5 there is shown a fur
ther embodiment of the invention as applied to
an inwardly opening window, in Whichthe metal
strip l of the guide bar rail is secured by weld
20 ing to the vertical flange of the window section’
B and is formed with a laterally projecting rib l3
as distinct to the arrangement of Figures 3 and
4, where the rail 3, 3' of the guide bar is in
clined to the horizontal thereby providing in
25 combination with the window pane, a condensa
tion channel. In Figures 3 and 4 the rib 4 is on
one side of the central plane of the rail but alter
natively it may be central (not shown). When,
however, the overhanging portion is horizontal or
30 substantially horizontal as in Figure 5, by con
structing the rib to project upwardly above the
plane of the metal the rib itself may be used to
provide this channel.
In Figure 5 provision is made for setting the
the clamp is increased since it is permitted to
move the entire length of the ?ange.
While the invention is mainly intended for side
hung’ windows with reference to which it has
been particularly described, it will be understood
that it is applicable to other forms, i. e., top
hung, bottom hung, and pivoted.‘
Although not illustrated it will be obvious that
if desired the guide bar or portion of the stay
may be integral with the ?xed frame or section 10
of the window, although such an arrangement is
not so practical as one of the advantages of at
taching the guide bar to the moving frame is
that it can be utilized as a condensation channel.
What we claim is:—-
1. In a casement window of the class wherein
a frame part is movably supported with respect to
a ?xed frame part, and in which the moving
frame part is provided with a-guide rail and the
?xed frame part has attached thereto a stay arm, 20
the combination with said guiderail and :said stay
arm of a clamp including a two-part sliding mem
ber adapted frictionally to engage said guide rail,
and a clamping pin extending through the stay
arm and the two parts of the sliding member and
being positioned torexert clampingrpressure on
I both the two-partrsliding member and the stay
arm whereby the c1amp,'the guide rail, and the
stay arm will be rigidly looked together.
2’. Combination as de?ned in claim 1 and in
which the guide rail is united throughout its
length to the movable frame part.
3. The combination as de?ned inclaim 1 and
35 angle of the throw of the tightening piece of the
in which the guide rail comprises a rib of bulbous
dated within the limited space allowed by the
window glazing. For this purpose the stud 8 is
.40 formed with a squared portion or spline portion
I4 adapted to engage in a spline-receiving groove
I5 in the lower half of the clamp, the head of
the stud of course being a loose ?t in the swing
ing stay arm E. If on assembly it is found'that
45 the thumb piece fouls the window pane, it is pos
sible by disengaging the squared portion of the
stud from the groove in the clamp and turning
said rib of bulbous section.
section for engagement, by the clamp and in
clamp H) as bounded by its locked and release' which
the clamping parts are shaped to embrace
positions so that it can be properly accommo
the screw through 90° or 180° as may be required
and then re-engaging the squared portion with
50 the groove,’ to- adjust the setting of the throw of
the thumb nut.
In' order to limit the travel of the clamp along
the guide bar a stop formed by means of a screw
4.. In a casement window of the class wherein
a frame part is movably supported with respect
to a relatively ?xed frame part, the combination
of a guide bar fast with one 'of said frame parts
and comprising an over-hanging rail portion ter
minating in'a relatively heavy rib’ of bulbous or
substantially circular cross section extending in
spaced relation to the frame part which carries
said guide bar; a stay arm attached to the other
frame part; and a clamp for rigidly but releas
ably securing said stay arm to said guide rail at
selected points therealong and including two
clamping members each formed with a rib-em
bracing recess shaped to embrace partially and
circumferentially said guide bar rib, a clamping
H3 or by crimping a portion I‘! of the bar itself _ pin passing through the stay arm and both of
said, clamping members and a clamping nut po
be provided.
to cooperate with said pin for exerting
The sliding stay construction of this invention sitioned
clamping pressure on both clamping members 1.5.5
possesses several advantageschief among which and
theistay arm.
is its neatness of appearance while when the
window is in its closed position the swinging stay
to in claim 1, the combination as de?ned in claim
60 arm tucks beneath the ?ange forming the guide
1 and in which the securing clamp includes two .60
bar. Moreover by constructing one of the op
erating members of the stay as a part integral pieces mounted for slidingengagement with the
rail, one of said pieces being formed with
with the framework of the window, the number aguide
spline-receiving portion and an adjusting pin
of loose parts is reduced.
provided with a spline portion cooperating with
Moreover, as compared with the existing prac
tice of attaching the guide bar to the window said spline-receiving portion formed on one of
7 section at its ends, the present arrangement has
the further advantage that the range of travel of
the clamp pieces.’ ‘
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