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Патент USA US2110940

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March 15, 1938;
Filed March 28, ‘1935
71 F. Pa veZ/ra
A éy?mmAttorney
Patented Mar. 15, 1938
Frank E. Pavelka, San Antonio, Tex.
Application March 28, 1935, Serial No. 13,537
1 Claim. (Cl. 292-54)
This invention relates to window looks. The the latch plate H intermediate their ends by the
primary object of the present invention is to stud screws I5, l6 and the lower ends of these
provide a window lock that is adapted for inscrews are connected with the plate H. The
stallation on vertically sliding window sashes, latch levers I 3, l4 rock on the pivot screws I5,
5 that is easily applied to the window sashes, that IS in a horizontal plane and the outer ends of 5
is comparatively inexpensive to manufacture, these latch levers extend outwardly from the
and thoroughly efficient to prevent one sash lower sash C in the path of the upper sash
from being raised with respect to the other sash B thereby forming gripping jaws which have
when in the locked position.
With the foregoing and other objects in view
the invention consists of a novel construction,
combination and arrangement of parts as will
be hereinafter more speci?cally described and
illustrated in the accompanying drawing where
15 in is disclosed an embodiment of the invention,
but it is to be understood that changes, variations
and modi?cations may be resorted to without
departing from the spirit of the claim hereunto
arcuate recesses I3e and Illa on confronting
side edges near their outer ends that engage the 10
opposite sides of the knob a and seat in the an
nular groove 9 when this groove is brought into
registry with the plane of the levers. Outwardly
of the pivots l5, [6 there is a coil spring ll con
nected at its opposite ends to the levers l3, M as 15
at I8, I 9. This spring I‘! bridges the space be
tween the latch levers l3, l4 and holds them in
locked relation in the annular groove 9 on the
In the drawing wherein like reference char
acters denote corresponding parts throughout
A rectangular hood 20 is open at its bottom as
will appear in Figures 2- and 3 of the drawing
with the outer portion thereof overhanging the
path of the upper window sash B. On the inner
end of the hood 20 is formed the lateral ?anges
2|, by which the hood is secured to the upper
face of latch plate II by the screws‘22. The
top wall 23 of the hood 2!] forms a cover for the
keeper knob a and the major length of the latch
levers I3, [4, while the rear ends of the latch
levers extend through a slot or cavity 24 in the
hood. On the projecting inner ends of the latch
levers I3, M are upstanding vertical gripping
?ngers 25 which serve to release the levers from
locked relation when the said ?ngers are pressed
together. Inside the hood 20 there is a central
limit stop in the form of a peg 26 secured to the
plate ll between the confronting ends of latch
levers l3, l4. On the outside of each lever l3,
I4 is an upstanding peg 21 which serves to limit
the space between the outer ends of the levers
when they are closed under the tension of spring
I‘! While the central peg 26 limits the width to
which the outer end of the latch levers may be
opened. Pegs 21 retain the outer ends of the
latch levers in spaced relation so that the width
between these levers will be such as to engage
the cam periphery l and be urged apart thereby
when either window sash is moved from open to
the several views:
Figure 1 is a fragmentary sectional view
through the upper and lower window sashes
0 showing an adaptation therewith of the window
lock in accordance with the present invention.
Figure 2 is a horizontal section through the
upper portion of the hood showing the underly
ing parts of the lock in plan view and in the
locked relation.
Figure 3 is a vertical section ‘taken substan
tially on line 3-3 of Figure 2 and looking in the
direction of the arrows.
Referring to the drawing in detail, A indicates
35' a window frame, and B and C indicate respec
tively the upper and lower sashes of the window
sliding vertically in the frame A. Secured to the
upper face of the lower rail 5 of the upper win
dow sash B is a rectangular keeper plate 6. Ris
40 ing above the keeper plate 6 is a centrally aper
tured keeper knob a the periphery of which slopes
outwardly from the top to the bottom thereof
to provide a cam periphery ‘l of frusto-conical
con?guration. A screw 8 extends through the
4 01 aperture in the knob and is anchored at its in
ner end to the keeper plate 6 thereby securing
the knob a to the plate. Where the lower face
of the keeper knob joins the plate 6 there is an
annular groove 9 in the knob to receive the pro
50 jecting ends of the latch levers as will hereafter
On the upper face of the upper rail ID of lower
sash C there is a latch plate I I secured there
to by screws l2. A pair of latch levers I 3, I4 are
55 formed of flat straight bars and are pivoted to
closed position.
Having thus described the invention, what is 50
claimed as new is:
A window lock comprising a keeper plate
adapted to be secured to the lower rail of an
upper window sash, a frusto-conical keeper knob
secured to the plate and formed with a continuous 55
peripheral groove near the base thereof, a latch
plate adapted to be secured to the upper rail of
the lower window sash, a pair of elongated
lease them from the groove and the knob, a sin
gle abutment peg anchored to the latch plate
inwardly of the pivot studs and between the in
straight ?at latch levers mounted in side by
ner ends of the latch levers to limit the space
between the ends of the levers in open position,
and a pair of abutment pegs anchored to the
latch plate one to the outside of each of the le
vers and outwardly of the pivot studs to hold the
outer ends of the levers in spaced relation when
disengaged with the keeper knob so that the 10
levers will be forced apart when the Window is
moved from open to closed position whereupon
the frustum of the keeper knob enters the space
side relation and formedwith arcuate recesses
on confronting sides near the outer ends thereof,
pivot studs connecting intermediate portions of
the levers to the latch plate to swing in a hori
zontal plane with the outer ends of the latch
10 levers projecting in the path of the upper sash, a
spring connected at its opposite ends to the le
vers outwardly of the pivot studs to urge them to
gether in locked relation with the recessed edge
of the levers seated in the groove on the knob, the between the levers.
15 inner ends of the levers formed with upstanding
gripping ?ngers to rock the latch levers and re
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