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Патент USA US3021173

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Feb. 13, 1962
e. HOFFMANN
3,021,163
LOCKING DEVICE
Filed May 15‘, 1959
2 Sheets-Sheet 1
FIG.2
FIG.1
Feb. 13, 1962
G. HOFFMANN
_
3,021,163
LOCKING DEVICE
Filed May 15, 1959
2 Sheets-Sheet 2
FIG. 4
FIG.5
FIG.?
FIG. 6
FIG. 8
Im/e7775r
Geovje Aoffmann
£77?)- heal
United States Patent
[ice
3,021,1h3
Patented Feb. 13, 1962
1
2
A lower sash 12 having a glass window pane 13 there~
in and an upper sash 14 having a similar glass window
3,021,163
LOCKING DEVICE
pane 15 therein, are both slidingly mounted within the frame 11. Each of the two sashes 12 and 14 are mount
ed in a manner which permits them to be moved from
George Hoffman, 19 Northcote Road, Hampstead,
Quebec, Canada
Filed May 15, 1959, Ser. No. 813,495
Claims priority, application Canada Apr. 2, 1959
1 Claim. (Cl. 292-147)
the top of the frame to the bottom of such, and vice
versa, independently of one another. Both the sashes
slide in planes substantially parallel with one another.
A handle 16 on the lower sash 12 assists in raising and
This invention relates to window locking devices.
Heretofore, many proposals have been made to secure
lowering the latter.
movable portions of windows together but the majority
of these have either been of complicated design, thus
.When the lower sash 12 and the upper sash 14 are
each in their closed position, the locking device, gener
increasing labour and assembly costs, or have not been
ally indicated at 17, maintains horizontal members 18,
too e?‘icient in preventing draughts entering and issuing
19 of the two sashes 12, 14 respectively, in locked condi
from between said movable portions, or have not been 15 tion, said horizontal member 18 constituting a ?rst win
too tamper-proof. Accordingly, it is the object of this
dow member and said horizontal member 19 constituting
invention to provide an improved window locking device
a second window member.
which will overcome the above disadvantages and which
As will be seen from reference to FIGURES 4-6,
will be relatively inexpensive to manufacture and as
when the sashes 12, 14 are in their closed position, their
20 associated horizontal members 18, 19, respectively, are
semble.
.
Accordingly, the present invention provides an im
adapted to be in face-to-face physical contact with one
provement in a locking device for use on a window in
>
cluding a frame, an upper sash mounted in the upper
part of said frame and a lower sash mounted in the
lower part of said frame, the upper sash and the lower 25
another owing to the provision of interacting tongues
2d and grooves 21 therein. Each of the horizontal m,em~
bers 18, 19 are provided with a channel 22 adapted to
receive the respective glass window pane 13, 15.
sash being slidably movable relative to one another,
The upper edge of the horizontal member 18 is ‘also
the locking device comprising in combination: a groove
provided with a guideway 23 (see FIGURES 3, 5 and 6)
along the longitudinal axis of the upper rail of the
which is oppositely disposed to the channel 22 therein,
lower sash; a latch slidable in said longitudinal groove,
and the side walls of said guideway 23 are each provided
said latch including a projection extending laterally out 30 with an inwardly extending projection 24, the purpose
wardly therefrom and including an enlarged head; a de
of which will be described hereinafter.
tent, secured to the bottom rail of the upper sash, said
Slidably mounted in the guideway 23 is the latch mem
detent including a longitudinal slot having an enlarged
ber 17 which is shown in greater detail in FIGURES 7
closed end, adapted to engage said lateral projection of
and 8. As will be seen from the drawings, each end of
said latch and adapted to be in sliding, frictional, face 35 the latch member 17 is provided with a foot 25 which
to-face engagement with said latch; and a spring, in the, ' has a pair of shoulders 26 ‘and a chamfered face 27 be
longitudinal groove of the upper rail of the lower sash,
tween which a bowed spring or resilient member 28 is
normally urging said latch upwardly and adapted, when
seated. One side face of the latch member 17 is also’
said latch is slid into engagement with said detent, to
provided with a projection 29 terminating, at one end
maintain the enlarged head in frictional engagement 40 thereof, in an‘ enlarged head 30.
.
with the enlarged closed end of said slot, to limit the
It will thus be apparent that when the latch member
movement of said latch away from the detent whereby
17 is inserted into the guideway 23 of the ?rst window
to maintain the latch in a slot position ‘and whereby
member 18, the bowed spring 28 will contact the bottom
said window is locked in its fully closed position.
of said guideway 23 and such contact permits the spring
The invention is illustrated in the accompanying draw 45 28 to urge the upper surface of each pair of shoulders
ings which show one embodiment of the invention.
26 of the feet 25 into contact with‘ the underside of the
In the drawings:
inwardly extending projections 24 of the guideway 23.
FIGURE 1 is a diagrammatic view of the locking de
This also maintains the projection 29 and enlarged head
vice as shown when applied to the interior of a window;
50 30._away from contact with the upper surface of the
FIGURE 2 is a front elevation of the upper and lower
sashes of a window showing the locking device, the
window being partially open;
FIGURE .3 is a transverse section taken on the line
3-—3 of FIGURE 2;
?rst window member 18. i
A pair of stops or rivets 31 extending between the
side walls of the guideway 23 and between which the
latch member 17 is slidably located, serve to limit the
amount of movement of the latter in either direction. 7
FIGURE 4 is a similar view of FIGURE 2 but showing 65 As will be seen from reference to FIGURE 2, a prede—
the window in closed position and the latch in operative
condition;
FIGURE 5 is a transverse section taken on the line
5—-5 of FIGURE 4;
.
FIGURE 6 is a perspective view of FIGURE 4;
FIGURES 7 and 8 are detail views of the latch por
tion of the locking device; and
terminedgamount of the tongue 20 and groove 21 in the
?rst window member 18 is removed between the pair
of rivets 31 so as to form a slot 32 in said member and
60 the purpose of this slot ‘will immediately become apparent.
A predetermined amount of the tongue 20 and groove
21 in the second window member 19, is removed coinci
dent with the slot 32 so as to form a housing for ade
FIGURE 9 is a detail View of the detent portion of
ent 33 (see FIGURE 9) which is secured thereto by
rivets 34.
the locking device.
65
As will be seen from the drawings, the detent 33 pro
Referring to the drawings, and in particular to FIG
jects beyond the upper edge of the second window mem
URE 1, a window frame Iii is shown mounted in a wall
ber 19 and is provided with a slot 35 which is open at
one end and closed at the other, the closed end of said
dow, except those constituting the locking device, are 70 slot 35 terminating, in an enlargement or hook portion 36.
From the above description, it will be apparent that if
formed from extruded aluminum except, of course, the
the second window member 19 shown in FIGURE 2
glass window panes.
11 of a building. In the window shown, the frame as
well as all the other structural components of the win
is moved upwardly, the detent 33 will enter the slot 32
3,021,163
3
4
formed in the ?rst window member 18 so that it pro
members, it would be impossible to release the locking
jects beyond the coincident upper ‘edges of ‘both of said
window members 18, 19. Concurrently, the tongues
device, due to-the fact that in’ order to do so, downward
and rearward movement must be imparted to said de
20 and grooves 21 in the window members 18, 19 will
engage [with one another so that the adjacent side faces
of the said window members will be in face-to-facc
’ vice.
C21
Although the invention is shown and described as
applied to a window having both upper and lower sashes
movable relatively to one another it will be appreciated
physical contact with one another.
that the locking device could be equally well applied to
types of windows where only one of the sashes is mov
It now the latch ‘member 17 is slid towards the right,
as viewed in FIGURE 2, enlarged head 39 of the projec
ticn 29 thereon will enter the slot 35 formed. in the de 10 able .or where only one sash is provided in each frame.
I claim:
>
tent 33. Due to the contact of the underside of the
In a window locking device for use on a window in
slot 35 with ‘the enlarged head 39, the latch member
cluding a frame, an upper sash mounted in the upper
17 will be urged downwardly against the action of the
part of said frame, and a lower sash mounted in the
bowed spring 28 until such time, and it the sliding move
ment of the latch member 17 is continued, that the'en 15 lower part of said frame, the upper sash and the lower
sash being slidably movable relative to one another,
larged head 30 commences to enter the enlarged hook
said locking device comprising in combination: a groove
portion 36 of the slot 35. When the latter occurs, the
along the longitudinal axis ofthe upper rail of the lower
bowed spring 428 will again exert itself and urge the
sash; a latch slidable in said longitudinal groove, said
entire latch member 17 upwardly so that the enlarged
head 30 will be ?rmly located within said hook portion
3_6 of the slot 35. The two windows will be thereupon
latch including a projection laterally outwardly there
from and including an enlarged head; a detent, secured
?rmly locked together and relative movement therebe
to the bottom rail of the upper sash, said detent includ—
ing a longitudinal slot having an enlarged closed end,
tween will be prevented.
When it is desired to unlock the two window members
18, 19, ?nger’ pressure is brought to bear upon the upper
adapted to engage said lateral projection of said latch
edge of the latch member 17, which is serrated at 37 _
gagement with said latch; and a spring, in the longitudi
and adapted to be [in sliding, frictional, face-to-face en
nal groove of’ the upper rail of the lower sash, nor
to'perniit easier manipulation, and ‘the latch member
117 moved downwardly against the action of the bowed
spring 28. This permits the enlarged head 30 to be
disengaged with the hook portion 36, whereby said latch
30
with the enlarged closed end ‘of said slot, to limit the
member
can be moved to the left, as viewed in FIG
URE 2, to permit unlocking of the components to occur,
until further movement of said latch member is pre
vented by reason of the latch member 17 contacting
the left-hand rivet 3i.
'
'
'
mally urging said latch upwardly and adapted, when
said? latch is slid into engagement with said detent, to
maintain the enlarged head {ill frictional engagement
movement of the latch away from the detent, whereby
to ‘maintain the latch in its locked position whereby said
‘window is locked in’ its fully- closed position.
"
It will thus be appreciated that with the improved
References Cited in the ?le of this patent
window locking device, a relatively tamper-proof win- ~
dow is provided inasmuch as the two window members
UNITED STATES PATENTS
are in face-to-face physical contact thereby preventing
an instrument from'being inserted therebetween, as well
as obviating the risk of draughts from entering.
Moreover, even if it was possible to insert an instru
ment- between the two contacting faces of the. window
40
426,388
King ____,_,-____,___,_____,,
____ "'T‘__"?"'.""'_f Apr. 22, 1890
' 1,432,640
1,659,249
Szah' ________ _..'____r__ Oct. 17, 1922
Entenmau __.V_T__.V_ ____ .. Feb. 14, 1928
1,923,533
Foresman ___________ __ Aug. 22, 1933
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