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Патент USA US3041106

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June 26, 1962
3,041,097
C. L. EADS
SLIDING DOOR LATCH
Filed Nov. 9. 1959
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INVENTOR.
WHANN 8 McMA/V/GAL
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3,Ml,097
Patented June 26, 1962
2
.
More speci?cally, the latch mechanism is mounted
within an elongate substantially rectangular housing or
casing 17 of two part construction. One of the casing
3,041,097
SLIDING DQOR LATCH
Charles L. Eads, North Hollywood, Calif., assignor to
Adams Rite Manufacturing Company, Glendale, C'alif.,
parts 17a is constructed to form the main case while the
other as indicated at 1712 may constitute the cover portion
of the housing or casing.
a corporation of California
Filed Nov. 9, 195?, Ser. No. 851,744}
3 ‘Claims. (Cl. 292-113)
The housing part 17a comprises a side plate 18 with
integrally formed side ?anges which form side edge walls
The present invention relates to generally to latch
19 and 20. At the ends of the side plate 18, integrally
mechanisms, and is more particularly concerned with a 10 formed end lugs 21 project from an end edge wall 22.
The plane of the end lug is parallel to the surface of the
latch mechanism of the type utilized with sliding doors.
side plate and the lug is positioned substantially midway
.Heretofore latches for sliding doors have been rela
of the depth of the side edge walls. The other part of the
tively expensive due to being constructed so as to pre
vent damage in the event that it is attempted to close the
sliding door while the latch is in an extended or latching
position. In these constructions the problem was solved
casing forms a cover or top portion which includes a side
plate 23 of a width to ?t between the side edge walls 19
and 20. At its ends, the side plate 23 is provided with an
by providing latching mechanism having the characteris
end wall forming portion 24 which is adapted ‘for inter?t
ting relation with the end wall 22.
tics that, if the latch is in extended or latching position
when the door is closed, the latch is able to collapse to its
normal unlatched position.
The latch member 14 is mounted for pivotal movement
20 between a retracted unlatched position and an extended
latched position in which the hook part 13 projects
through an opening 25 in the side edge wall 19. For such
mounting, the latch member 14 is provided with a pivot
It is an object of the present invention to simplify the
construction of the latch mechanism, and yet provide a
construction which will prevent damage to the mechanism
pin 26, the ends of this pin being positioned respectively
in the event that the door is closed while the latch is in
extended position. To this end, the present invention
proposes to provide an arrangement wherein the latch
is not collapsed to its unlatched position, but wherein the
latch may be depressed from its extended position against
a spring force which will act to return the latch to its ex
tended position when the collapsing force is withdrawn.
A further object of the invention is to provide an im
c"w‘a~n.
25
in arcuate slots 27 formed respectively in the side plates
18 and 23 of the housing and being transversely aligned.
As shown in FIG. 1, the pin 26 is normally resiliently re
tained at one end of the slots 27 by means of a spring 28,
this spring being anchored at one end on a post 29, and
30 having its other end as shown at 3!) looped around the
pivot pin 26‘. It will be appreciated that the pin and slot
proved arrangement of mounting lugs which will permit
mounting for the latch member may be reversed without
the latch mechanism housing to be mounted in a recess
changing the operation of the device. That is, the pin
may be made stationary and supported on the casing,
or a cut out of the door structure or a frame, or a handle
structure associated with the door, and which will permit 35 while the slot is arranged in the latch member.
For actuating the latch member, an actuating lever 31
reversal of the mounting without change to obtain right
is provided. As shown primarily in FIGS. 1 and 4, this
and left-hand operation in accordance with installation re
lever is composed of a pair of side plates 32 and 33 which
quirements.
are retained in spaced apart relation by means of one or
Further objects of the invention will be brought out in
the following part of the speci?cation, wherein detailed 40 more spacing elements 34- in a handle forming projecting
end 35. The other ends of the side plates 32 and 33 are
description is for the purpose of fully disclosing the inven
enlarged to provide a generally triangular end portion 36.
tion Without placing limitation thereon.
Each of the end portions 36 is provided with an integrally
Referring to the accompanying drawings, which are for
formed outwardly struck circular boss 37. These bosses
illustrative purposes only:
FIG. 1 is a side elevational view showing a latch mech 45 are transversely aligned and form pivotal supports for the
lever, the bosses respectively being rotatably supported in
anism embodying the present invention as applied to a slid
appropriate openings 38 side plates 17 and 18. The bosses
ing door, the housing cover being cutaway to show the
37 may be provided with aligned rectangular openings as
working parts, the latch being in latched position;
indicated by the numeral 38' for removably receiving an
FIG. 2 is a view similar to FIG. 1, showing the position
of the working parts, when the latch is in unlatched posi 50 actuating member in lieu of operation by the handle 35.
One set of corner portions of the spaced apart tri
tion;
angular end portions 36 are positioned on opposite sides.
FIG. 3 is a fragmentary view showing the latch mem
ber in depressed collapsed position;
of the latch member and are connected to the latch
FIG. 4 is a sectional view through the latch, taken sub
stantially on line 4—4 of FIG. 1;
FIG. 5 is an end view of the housing showing the in
ter?tting relationship of the housing cover, and the mount
member so as to form an articulate connection therewith.
55 For such purpose, a pin 39 carried by the actuating lever
extends through an elongate slot 40’ in the latch mem
ber. It will be appreciated, however, that this pin and
slot connection may be reversed without changing the
operation of the parts. That is, the pin may be carried
FIG. 6 is a side edge view of the housing showing the
opening through which the latch is movable to extended 60 by the latch member and the slots formed in the end
portions 36. In either case, it will be apparent that the
and retracted positions.
latch member and actuating lever as thus connected form
Referring now more speci?cally to the various ?gures
in effect a toggle between the pivotal mounting of the
of the drawings, the sliding door latch of the present in
latch member and the pivotal mounting of the actuating
vention as generally indicated by the numeral 10 is shown
as being carried by a sliding door 11, the latch mechanism 65 lever, this toggle being Operable through a dead center
position as the handle 35 of the actuating lever is moved
being mounted in a cutout or recess 12 which may form
ing lug position; and
from one limit to another limit of pivotal movement. A
compression spring 40 which is anchored at one end to
a post 41 and connected at its other end to the end por
in extended latched position, will be adapted to extend 70 tion 36 as by a pin 42 functions to resiliently move the
a part of the door frame or the actuating handle structure
for the door. In any event, the latch mechanism is so
mounted that a hook part 13 of a latch member 14, when
through an opening 15 into latching engagement with a
part of an associated door jamb 16.
actuating lever from dead center position towards its
respective limits of movement.
3,041,097
3
The retracted or unlatched position of the latching
mechanism of the present invention is shown clearly in
FIG. 2. The spring 4% acts to resiliently retain the latch
member in a position wherein its hook part 13 is dis
posed within the casing or housing. Latching of the’
sliding door, with which the latch mechanism may be
A
adjacent wall of said housing and a pin movable therein
carried by said latch member; means for’ actuating said
latch member including a lever having an articulate
connection movable through a dead center position to
a dead locked position when the hook part is in said
position exterior of the housing; and spring means re
siliently opposing movement of said latch in a direction
associated, is readily accomplished by merely moving the
to cause relative movement of said pin in said slot, but
handle end 35 of the actuating lever from a downwardly
enable said relative movement and the further move
extending angular position of its limited movement to an
upwardly extending angular position of its limited move 10 ment of said hook part in a clockwise direction from its
extended position to a position within the housing upon
ment as shown in FIG. 1. In accomplishing the latching
the application of a collapsing force sufficient to over
operation, the toggle formed by the articulate connec
come the action of said spring means.
tion of the latch member 14 and the actuating lever 31
will move through a dead center position to a dead lock
position as shown in FIG. 1, wherein the hook part 13
'will be in latching engagement with the door jamb 16.
In this position, the latch member is held against rota
tional movement about its pivot point in a reverse direc
tion to an unlatched position by pressure exerted against
2. Latch mechanism, comprising: a housing having an
opening therein; a latch member vhaving a hook part;
means pivotally mounting said latch member for move
ment in a counterclockwise direction to a position in
which the hook part lies within the housing, and in a
clockwise direction to an extended position in which the
the ?nger part 13.
20 hook part extends through said opening to the exterior of
the housing, said means including an arcuate slot in an
The latch member in ‘being moved by the actuating lever
adjacent wall of said housing and a first pin movable
from an unlatched retracted position to a latched ex
tended position rotates about a pivot point having a ?xed
therein carried by said latch members; means for actuat
position. The pivot point is relatively ?xed for the
ing said latch member including a lever having a second
reason that the pivot pin 26 is resiliently retained in the
pin and slot connection with said latch and providing a
toggle movable through a dead center position to a dead
left end of the slot 27 by the action of a spring 28, as
locked position when the hook part is in said extended
shown in FIG. 1. However, with the hook part 13
extended as shown in FIG. 1, it will be noted that the
position exterior of the housing; and spring means resil
pin 39 is at the center of radius of the slot 27. While
the latch member is dead locked in extended position
against rotative movement about its pivot point, as es
tablished by the pin 26 and associated slot 27, the latch
iently opposing movement of said latch in a direction to
cause relative movement of said ?rst pin in its associated
slot, but enable said relative movement and the further
movement of the latch in a clockwise direction about
member may be rotated in a clockwise direction about
the pin 39 as a center by the application of a collapsing
of said lever with the latch so as to position said hook
the pivot pin of said second pivot pin and slot connection
force applied against the outer edge of the hook part 13. 35 part within the housing upon the application of a col
Such a force might be occasioned by the hook part strik
lapsing force suliicient to overcome the action of said
ing against the door jamb, when attempting to close
spring means.
the sliding door when the hook part 13 is in extended
3. Latch mechanism, comprising: a housing including
latched position. When such force is applied against
a wall having a slot therein; a latch member in said hous
the hook part, the latch member is free to rotate in a
ing; a pin carried by said latch positioned in said slot for
clockwise direction, the pin 26 moving along the slot
27 until the hook part of the latch member occupies a
position within the casing or housing, as shown in FIG. 3.
'Upon relieving the collapsing or moving force applied
against the hook part 13, the spring 28 will act to rotate
the latch member in a counterclockwise direction so that
supporting said latch for movement in a clockwise direc
tion to extended position and in a counterclockwise direc
tion to a retracted position; spring means normally retain
ing said pin at one end of said slot during said latch
movements; a manually operable actuating lever pivoted
for swinging movement through a dead center point from
the hook part again assumes an extended position as shown
in FIG. 1. Damage of the latching mechanism under
one limit position to another limit position; means biasing
said lever from said dead center point towards each of
such conditions is thereby prevented. Return of the
said limits; and articulate means including a pivot and slot
latch mechanism to unlatched condition is readily accom 50 connection between the swingable end of said lever and
plished merely by swinging the handle 35 of the actuating
said latch forming a toggle movable through a dead center
lever from its upper limit, as shown in FIG. 1, to its
position to a dead locked position with respect to the ex
lower limit position as shown in. FIG. 2.
tended latch, when the lever is in one of its limit posi
Various modi?cations may suggest themselves to those
skilled in the art without departing from the spirit of my
invention, and, hence, I do not wish to be restricted to
the speci?c form shown or uses mentioned, except to
the extent indicated in the appended claims.
I claim:
1. Latch mechanism, comprising: a housing having 60
an opening therein; a latch member having a hook part;
means pivotally mounting said latch member for move
ment in a counterclockwise direction to a position in
which the hook part lies within the housing, and ,in a
clockwise direction to an extended position in which 65
the hook part extends through said opening to the ex
terior of the housing, said means including a slot in an
tions, and said pivot in the extended position of said
latch forming a pivot point about which said latch is
pivotally movable in a clockwise direction under an ap
plied collapsing force while the lever is in said deadlocked
position.
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,701,157
2,742,309
2,789,852
2,924,475
2,928,689
‘Le Bon ______________ __ Feb. 1,
Hillgren _____________ __ Apr. 17,
‘~Eads ________________ __ Apr. 23,
Russell _______________ __ 1Feb. 9,
Mineah _____________ __ Mar. 15,
1955
1956
1957
1960
1960
~
UNITED STATES PATENT OFFICE
CERTIFICATE OF CORRECTION
Patent No. 3,041,097
June 26v 1962
Charles L. Eads
It is hereby certified that error appears in the above numbered pat
ent requiring correction and that the said Letters Patent should read as
corrected below.
Column lI line 9, strike out "to", first occurrence; line
42, for "limitation" read -— limitations --; column 4, line 239
for "members" read —- member —--; line 63, for "Le Bon" read
—— Le Bon III
——.
Signed and sealed this 20th day of November 1962.
(SEAL)
Attest:
ERNEST w. SWIDER
Attesting Officer
DAVID L- LADD
Commissioner of Patents
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