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Патент USA US3039814

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June 19, 1962
B. A. QUINN
3,039,804
DOOR LATCH MECHANISM
Filed Aug. 4, 1961
2 Sheets-Sheet 1
INVENTOR.
.BERT A. OUINN
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.AT 'TOP-?NE YS
June 19, 1,962
B. A. QUINN
3,039,804
DOOR LATCH MECHANISM
Filed Aug. 4, 1961
2 Sheets-Sheet 2
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United States Patent
1
3;039,804
DO?BR LATCH MECHAN?SM
Bert A. Qui??n, St. Paul, Minn., assignor to Ideal Brass
Works, Inc., St. Paul, Mimi., a corporation of Minne
sota
Filed Aug. 4, 1961, Ser. No. 1.3!),726
2 Claims. (CI. 292-254)
tree
3,039,804
Patented June 19, 1962
2
engaging a side jamb 3 of a door frame 4 when the door
is in a closed position, as shown in FIG. 3. While my
door latch mechanism is suited for operation with doors
and door frames made of wood as well as metal, the door
2 and door frame 4 are shown as being made from metal,
such as extruded aluminum, the Construction thereof being
hollow.
A latch hook 5 compríses a pair of spaced parallel
plate-like hook elements 6 that are integrally formed with
My invention relates generally to door latches, and
more particularly to improvements in door latch operat 10 a base-member in the form of an escutcheon plate 7 which
is mounted on the inner surface 8 of the side rail 1, the
ing mechanisms for latches that are used with cooperating
escutcheon plate 7 being formed with a pair of vertically
extensíble and retractahle strike elements.
An important object of my invention is the provision
spaced mounting bosses 9 that extend into openings 10
through the inner surface 8 of the side rail 1, see FIG. 2.
of a door latch mechanism including a rigid latch hook
for mounting on a door, a movable strike element for 15 A second mounting base 11 is mounted on the outer sur
mounting on a door frame for movements into and out
of the path of travel of the latch hook during opening
and closing movements of the door, and novel means for
moving the strike element out of latching engagement
face 12 of the side rail 1, the mounting base 11 being
provided with mounting bosses 13 that eXtend through
openings 14 in the outer surface 12, the openings 14 being
aligned with respective ones of the openings 10. The
20 mounting bosses 13 are screw threaded to receive mount
with the latch hook.
ing screws or the like 15 that anchor the escutcheon 7
Another object of my invention is the provision of a
and base member 11 to the opposite sides of the side
latch Operating mechanism which requires a minimum
rail l, see FIG. 2.
space within a door for Operating the latch from either
The hook elements 6 of the latch hook 5 have co-planar
side of the door.
Another object of my invention is the provision of a 25 cam surfaces 16 and co-planar latching surfaces 17 that
are adapted to engage a cooperating strike element 18
latch structure which requires the use of only a drill and
that is carried by a bracket 19 that is rigidly secured to
screw driver for mounting the same to a door and door
the door frame 4 by means of mounting screws or the
frame.
like 213. The strike element 18 is in the nature of an
Another object of my invention is the provision of a
door latch structure which possesses a minimum number 30 elongated rod that is extensible and retractable into and
out of the path of travel of the latch hook elements 6
of moving parts.
during opening and closing movements of the door 2.
Another object of my invention is the provision of a
The strike element 18 is yíeldingly urged toward the path
door latch mechanism having an Operating handle at one
of travel of the hook elements 6 by a pair of coil com
side thereof which moves in a door opening direction to
pression springs or the like 21, one of which is shown in
release the door for opening movement.
FIG. 3. The strike element 18, together with its bracket
Another object of my invention is the provision of door
19 and springs 21, is fully shown and described in my
latch mechanism which is simple and inexpensive to
prior United States Letters Patent 2,973,986, issued March
produce, which is highly eñicient in operation, and which
7, 1961. During closing movements of the door, the co
is rugged in construction and durable in use.
The above, and still further highly important objects 40 planar cam surfaces 16 engage the strike element 18 and
impart retractíng movements thereto against yielding bias
and advantages of my invention will become apparent
from the following detailed speci?cation, appended claims
and attached drawings.
Referríng to the drawings, which illustrate the inven
tion, and in which like reference characters indicate like 4:5
parts throughout the several views:
FIG. 1 is a fragmentary view in side elevation of a
conventional door and door frame, showing my latch
mechanism mounted thereon;
FIG. 2 is a fragmentary vertical section, taken sub
of the springs 21; and, when the door is completely closed,
the strike element 18 is disposed in latching engagement
with the co-planar latching surfaces 17 of the hook ele
ments 6, as shown in FIGS. 3 and 7.
For the purpose of imparting retracting movement to
the strike element 18 to permit opening of the door 2, I
provide a latch release member 22 that is disposed be
tween the hook elements 6 and pivotally mounted therein
by means of a pivot pin or the like 23, the release member
22 having integrally formed therewith an Operating handle
stantially on the line 2-2 of FIG. 1;
24 that extends in a direction generally parallel to the `
FIG. 3 is a fragmentary horizontal section taken sub
adjacent side of the door 2. The hook elements 6 of
stantially on the line 3-3 of FIG. 1;
the latch hook 5 are joined by a transverse portion 25
FIG. 4 is a view partly in elevation and partly in sec
tion taken substantially on the line 4-4 of FIG. 2, some 55 which de?nes a pair of surfaces 26 and 27 which co_
operate with respective surface portions 28 and 29 on
parts removed;
the latch release member 22 to limit swinging movements
FIG. 5 is a View corresponding to FIG. 4, but showing
a ditferent position of some of the parts;
of the latch release member 22 in opposite directions
FIG. 6 is a view partly in side elevation and partly in
about the axis of the pivot pin 23. As shown by dotted
section, taken substantially on the line 6-6 of FIG. 3; 60 lines in FIG. 7, movement of the Operating handle 24 in
FIG. 7 is a fragmentary section taken on the line 7-7
the direction of the door 2 will cause the latch release
of FIG. 2, some parts being broken away;
member 22 to engage the strike element 18 and impart
FIG. 8 is a fragmentary section taken on the line 8-8
retracting movement thereto against bias of the springs
of FIG. 2;
21, to release the strike element 18 from engagement With
FIG. 9 is a view in perspective of the latch hook and 65 -the latching surfaces 17 of the hook elements 6, this move
locking mechanism of my invention, some parts being
ment being limited by abutting engagement of the surface
broken away and some parts being shown in section; and
portion 29 of the latch release member 22 with the cooper
FIG. 10 is a View in perspective of the latch release
ating surface portion 27 of the transverse portion 25. It
member of my invention.
will be noted 'chat movement of the Operating handle 24 in
Referring with greater detail to the drawings, the nu 70 a strike releasing direction is common to the direction of
meral 1 indicates a vertically disposed side rail which
door opening movement. Hence, when opening the door
deñnes the free edge portion of a door 2, the side rail 1
from the inside of the building, it is only necessary to
aosaeoa
4
push the Operating handle 24 toward the door to release
outer end of the tubular portion 41 thereof, is formed'to
the latch and to impart opening movements to the door.
provide a mounting lug 5@ for anchoring one end of a
When olosing the door from the inside, the Operating
rígid handle member 51, :the opposite end of which is
handle 24 is pulled in a direction away from the door, the
surface portion 28 of the release member 22 abuttíng its
oooperating surface 26 of the latch hook whereby to re
rigídly Secured to the outer surface 12 of the side rail -1
by suitable means, such as an anohoring screw or the like
52. As shown in FEG. 2, the mounting lug 50 is provided
with a ?ange 53 that is received within a groove 54 in
tract the strike engagíng portion of the release member
the adjacent end of the handle member 51 to rigidly secure
22?to permit the strike 18 to move into latohing engage
the adjacent end of the handle member 51.
ment with the latching surfaces 17 of the latch hook 5.
Means for releasably looking the latch release member 10
It will be appreciated that, if desired, the spring 47
22 against movement in a direction toward the strike ele
ment 118 comprises a generally cylindn'cal looking mem
can be omitted from the above described Construction,
pressure of the strike element 18 against the latch release
ber 39 that is journalled inthe base or escutoheon portion
member 22, when the door is closed, normally being su?i
cíent to cause the push button 39 to be moved outwardly,
7 of the latch hook 5 for limited rotary movement on an
axisthat extends transversely of the side rail 1 or parallel 15 due to camming engagement of the cam surface 49 of
to the axes of the mounting screws 15. The looking mem
the latch release member 22 with the adjacent end of the
push rod 49.
ber 30 is .formed to provide a radial portion 31 that ex
tends outwardly through a notoh 32 in the base or esoutoh
it desired, suitable key-equipped looking means, not
eon portion 7, and a handle portion 33 that extends out
shown, may be provided in the push button 39 for im
wardly in a direction generally parallel to the hook ele 20 parting rotation to the push rod %Ct and resultant rotation
to the cylindrioal looking member Sii, so that the latch
ments 6, see particularly FIG. 7, by means of which
handle 33 the looking member 30` may be rotated be
release member 22 may be unlooked or looked from the
tween looking and release positions. A leaf spring detent
exterior of the door.
element 34 is anchored in the base or escutcheon portion
My invention has been thoroughly tested and found to
7,- and is adapted to selectively engage a pair of radially 25 be completely satisfactory for the aocomplishment of the
extending notches or grooves '35' and 36 in the looking
objeotives set forth; and while I have shown and de
member 30 to releasably hold the looking member 36 in
soribed a commercial embodiment of my improved door
its locked or release positions. The member 35) is formed
latch mechanism, it will be understood that the same is
capabie of modi?cation without departure from the spirit
at its outer end to provide a stop lug 137 that is adapted to
be moved into and out of the path of movement of a ?n 30 and soope, as de?ned in the olaims.
What I claim is:
ger 38 integrallypformed with the latch release member
22, responsive to movement of the looking handle 33 be
l. in a door latch mechanism, a rigid latch hook hav
tween its looking and release positions. As shown in FEG.
ing a base portion adapted to be mounted fast on a door
4,› the stop lug 37 is moved ciroumferentially out of the
for common movements therewith, a cooperating strike
path of movement of the ?nger 33, whereas in FlG. S,
element adapted to be mounted on a door f?-arne in the
the stop lug37 is moved circumferentially into the path
path of travel of said latch hook, said strike element
being yieldingly urged into said path of travel of said latch
of travel of the ?nger 33, to limit movement thereof in
hOO'?Ç and retractable transversely out of said path, said
aidirection from the left to the right with respect to FIGS.
latch hook comprising a pair of laterally spaced hook
4;~and 5, or in a latch releasing direction.
-For the purpose of unlatohing the door 2 from the eX 40 elements having ooplanar strike engaging cam portions
terior thereof, I provide a latch releasing devioe com
and coplanar strike engaging hook portions, said strike
prising a push button 39 and a cooperating push rod 4%,
being engaged rby said cam portions and retracted thereby
the button 39' and push rod 40 being disposed on the axis
during olosing movements of the door and urged into
of the generally cylindrical looking member 39'. The push
engagement with said hook portions when the dooris
button 39 is mounted for axial movements in an out
fully closed, a release member disposed between said
wardly extending tubular portion 41 of the base member
hook elements and pivotally connected thereto vfor swing
1.1 and held against rotary movement therein by a dia
ing movements toward and away from engagement with
metrioally opposed pair of lugs 42 integrally formed with
said strike when said strike is disposed in engagement
with said hook portions, an operating handle integrally
the push button 39 and received in axialwly extending chan
nels 43 formed in the base member 11, see FIGS. 2 and 8.
The push rod 40, which is preferably made from rigid
metallíc material, extends axially through a pair of aligned
openings 44 in the opposite sur?faoes JS and 12 of the side
rail 1 and has its outer end portion -aXially slidably re
ceived in a central opening in the oylindrioal looking mem
ber 30. The opposite end portion of the push rod 46- is
formed to provide a ?ange 45 that abuts the adjacent end
of a holilow axial boss 46 integrally formed with the push
formed with said release member *and extending in a di
rection generally parallel to the plane of the. door and
movable toward the door to impart retracting movement
to said strike, whereby to permit the door to open, a
movable release member Operating device, and means for
mounting said device on the opposite side of said door,
said release member Operating device including a push
rod adapted to extend through a transverse opening in
the door and engageable with said release member to
impart strike releasing movement thereto.
button '39, see FIGS. 2 and 3. A tapered coil compres
sion spring 47 is interposed between the ?ange 45 and 60
2. The structure de?ned in claim 1 in further combina
tion with look means .for releasably looking said release
the adjacent wall surface 12-of the side rail 1 and yield
member against movement in a direction to engage said
ingly urges the push rod 40 and button 39 toward one
strike, said lock means comprising a looking member
limit of -axial movement thereof, or outwardly with re
journalled in said latch hook base por-tion for limited ro
spect to the door 2. Preferably, and as shown, the outer
end of the push rod 40' is formed to provide a head por 65 tary movement and having :a handle portion projecting
outwardly of said .base portion, said looking member
tion 48 that is received within the tubular boss 46, where
being formed with a lug and a pair of oiroumferentially
by the push rod 40 is supported by the push button 39.
spaced recesses, said lug being movable into› and out of
The inner end of the push rod 40, slidably received in the
the path of travel of said release member responsive to
looking member !30, is adapted to engage a cam surface
portion 49 of the latch release member 22, responsive to 70 .rotation of said looking member in opposite directions,
and a detent element received in a different one of said
axially inward movement of the push button 39 and
recesses at opposite limits of a rotary movement of said
against bias of the compression spring 47, to move the
looking member and yieldingly holding said looking mem
latch release member 22 in a direction to disengage the
ber against said rotary movement.
strike element 18 .from the latching surfaoes 17 of the
latch hook 5. As shown in FIG. 2, the base 11 at the 75
(References on following page)
5
6
References Cited in the ?le of this patent
UNITED STATES PATENTS
491,706
922,325
978,275
1,634,195
1,637,168
1,784,935
1,787,296
2,108,965
2,23 4,810
2,23 8,066
2,317,700
2,3 80,543
Jacobus _____________ __ .Feb. 14, 1893
Parle _______________ __ May 18, 1909
Crewson et al _________ __ Dec. 13, 1910
2,5 68,3 83
Johnston ____________ __ June 28, 1927
Wild ________________ __ Ju1y 26, 1927
Johnson ______________ __ Dec. 16, 1930
Wild ________________ __ Dec. 30, 1930
10
2,655,027
2,773,376
2,790,668
Gray ________________ _~ Feb.
Simpson ____________ __ Mar.
Mantz _______________ __ Apr.
Thompson ___________ __ Apr.
Ostrom _____________ __ July
Can-011 ______________ __ Sept.
Lynxwiler ___________ __ Oct.
22,
11,
15,
27,
31,
18,
13,
Wartian _____________ __ Dec. 11,
1938
1941
1941
1943
1945
1951
1953
1956
Friedman et al. _______ __ Apr. 30, 1957
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