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Üct. 29, 1946. -
J. C. IRWIN
2,410,347
DOOR LATCH
Filed Jan. 29, 1944
2
I
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2'- sheetsl-sneet 1
i
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AJusïus
C. Inwno
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'
Oct. 29, 1946.
J. c. IRWIN,
’ 2,410,347
DOOR LATCH
Filed Jan. 29, 1944
.
2 sheets-sheet 2
Jusvv; Q. Imm
Patented Get. 29, 1946
2,4l0,347
UNITEDv STATES PATEN» O`~Ii`li`l1CEV ,
2,410,347‘
Doon LATCH
.ïustusl C. Irwin,- l‘v’ii'nneapolis,` Minn., assignor to'V
Wright Products, Inc., St. Paul Park, Minn., a
corporation of Minnesota>
Application January 29, 1944,]Serial No. 520,235
(Cl. 292-126)
This invention relates to’door~ latches and the"
main object- is~to provide a simple, eiiicient and
practical type of 'latch thatk may be operated
from either side of the door, and which" is par
ticularly designed andintended'foruse in 'screen
door and stormdoors wherecomparatively simple'
and’ economicall hardware >is desired;
A-'furt-her object is to» provide a4 novelv latch of
the bored-intype, which meansl that it is> un
2
~- This'plate surrounds the boreB'an'd has' inwardly
projected flanges or arcuate lips 'I" and8"which'
ñt'snugly into' one' end of the bore, it being 'under'
stoodthat these' lips are formed to ñt into a’ bore"
or hole B ofl predetermineddiameter.' Punched
'inwardly' Írom'the escutcheo'n‘ 5`are also a' pair'
of ears â'which serve as a fulcrum" Supports for
the pivot pinV I û‘of'a handle member I I-I 2. This
handle member' is' substantially U-shaped' and,
necessary to cut- into the edge of> the'door bysaw 10H extends through the bore B to provide inner andi
and ehisel'methods to install'the'latch, and that
`outer latch handles II and' I2;A respectively; by’
it »is'only necessary'to bore a> hole‘in'the door, an
which the latch is operated.`
operation that can' be done easilyandr quickly,'
The handle' member I'I‘-í2`. is. preferably' of t
thus greatly- shortening installationl time' while
hoilcw construction, as` shown, and‘inany'event
increasing the accuracy with-` whichl the work' 15 Vis centrally slotted or recessed to receive 'a'latch
can ine-done;
,
dog i3 which is pivoted in the handle member,v
¿lr-further Objectis to provideia> bored-inltype
as at' I4; and has `a hookedv endv Iâ'ext'en'ding
of »latch which. within predetermined limits, may
through a slot' Iâ't'o releasa'blyengageA the keeper
be used in doors of various thicknesses,'and'which
G'. The latch dog is further'provided with alug"
infact >is -sel? adjusting -to doors of vany' thickness 20 or extension I‘!"which~ projects through a' slot I8
size within standard4 or conventional practices,
in the handle member’to' contactt an' abutmentv
thus eliminating the necessityy for "diiîerentsizes
tongue’ I9 which. is preferably punched inwardly'
oi latches orfmeohanically adjustable features' as"
from an outer escut‘cheon plate zll'secured‘tothev '
has heretofore been customary.
outer surface of 'the door'C by suitable means such
@ther-and' moredetailed objects'will be' dis' 25 as Vscrews 2'I. The h'ole‘thus left inthe es'cut'cheon`
closedY inthe course of the> following specification;
2t; by thepunching 'an'dbending' out of the abut
refeference being had- tothe accompanying draw'- y
ment‘lil, provides a recess 22 through which the'
ings - wherein
handle' l2 'projects and'is'of sufficient size to'perL
Fig; l is a horizontal> section' through'a door'
mit oscillating action of the handle'member about"
and> door`> casingY and~through my improved'latch 30 the pivot'center I 0'. Al spring' `23.' is arranged to
which» is-fastenedin the'door'and shown' as en-'
exert constant pressure on the latch dog"I3,` and
gaged-with the vkeeper plate to hold' the door
is formed, as shown- in Fig. 4, with a slot' 24' to
closed.
V
receive the 'adjacent' or pivoted end'of' the latch
Fig. 2 is a sectionalview'similar‘to'Fi'g. 1,v but
dog’.n One end of‘the spring'j contacts" the latchr
showingV the" latch mechanism adjusted'to open 35 dog, as at' 25,' and the other' endiengages" the
position; this‘view also showing ad'ditional'parts
inner handle (I2)" surface, while the intermedi
of the‘devicein section, and showing the'latc'h
ate portion passes under andis held'infplace 'by
as applied toa thinner’construction' of door than
the pivot' pin I4.' This springfserves the‘double’
in'Fig. 1.
purpose of holding the“ latch hook I 5in projected'
Fig. 3 is a perspectiveyiewof the‘latch unit
position for rengagement"withthe keeper G, and;
removed from‘the door:
by pressing the extension» I'I against the abut
Fig; ‘lV is> aA perspective View of'parts of the latch
ment> i9, serves Vto hold thehandle member ' in
in disassembled positions, and"w_ith-a portion "of `
normally ir'ioperaltive> positionl since such actionA
the handle ¿member broken away.
causes the `pivot connection I4 to urge the handle
Referring to thev drawings more' particularly 45 end I2 to the right, as seen in Figs; 1v and `2, about
and by reference'characters A designates gener
ally my‘improvedv latch which` is `mounted inthe
the
Topivot
install
axis
the
I0. latch it is preferableV
` l ’
to. first
cylindricalv hole B bored inthedoor-‘C'which is
mount the keeperv G at the de'sired'elevation'.andï
hinged at D in the -door‘ frame E so as to swing
in clo'se proximity to the'inner'surface' of' the"
towardand away from a'stopeF‘andla'keeper‘Cv` 50 door'when closed. The center' of th'e'ho1e"'B,'t'o~
which keeper is disposedto bereleasably engaged
be bored, is then marked' on' the' door> at the
by the latch to hold the door closed."
proper 'predeterminedpositionwith respect to the
The'latch proper comprises an inner escutcheon
keeper, whereupon >an ordinary 'augenand bit may
plate 5,‘ mountedupon Vthe inner surfacer of Vthe
be employed to drill'the hole.' When this is done
door. and' is securedl thereto' ‘by 'suitable' screws 6. 55 *theV escutchean plate' 5,whicli" carries "the handle `
2,410,347
3
4
member II-I2 and latch I3 as shown in Fig.
3, is properly located by the flanges 'I and 8, as
above noted, the handle end I2 having first been
projected through the bore, and this unit is then
inner surface of the door, a latch dog pivotally
1
secured to a swingable part of the handle mem
ber at a point spaced substantially outwardly with
respect to said first pivot axis and having a hook
5 end extending inwardly and to a point beyond
fastened in place by the screws 6.
.
the inner surface of the door for engagement
The outer escutcheon plate 20 is then passed
with a keeper. >
over the length of the handle I2 and the abut
’ 2. A latch for operation in a hole bored in a
ment tongue I9 is then inserted in the bore as
door at a point spaced from the edge thereof,
shown in Figs. 1 and 2. It may be noted that
since the spring 23 is pressing the lug I‘I toward 10 comprising an escutcheon secured upon the door
surface about one end of the hole and having a
the circumference of the bore it will yieldingly
projection for guiding engagement in one end of
contact the tongue I9 and will hold it and the
the hole, a generally U-shaped handle member
plate 20 in proper position while the attaching
pivoted to the escutcheon at a point adjacent
screws 2I are being secured.
It will thus be seen that I have not only de
15 the door surface on which the escutcheon is se
veloped an extremely simple form of latch, but
cured and having handles at both ends for ma
nipulation at opposite sides of the door, a latch
dog pivoted to a swingable part of the handle
member at a point spaced from the pivot con
20 nection between the handle member and escutch
one which can be accurately installed with a
minimum number of tools and with a minimum
amount of effort.
It will also >be noted that this latch mecha
nism is particularly valuable from a practical
point of view for the reason that it is self-ad
`instable Vto various door thicknesses and thus
eliminates the necessity for providing several dif
ferent sizes 'as has heretofore usually been neces 25
sary. Thus it will be seen that since the entire
latch mechanism is mounted on the escutcheon
eon and having a hook at its other end extend
ing from the handle member for engagement with
a keeper.
3. A door latch comprising a generally U -shaped
handle member extending through an aperture
in the door` with handle portions at inner and
outer sides of the door, pivot means forming a
vertical fulcrum for the handle member at a
5, ‘and 'the tongue I9 is in slidable contact with
point adjacent the plane of the inner surface of
the lug Il the plate 20 can always be secured
flush with the outer surface of the door by ñrst 30 the door, a latch dog pivoted to the handle mem
ber at a point spaced from said handle member
pushing the tongue I9 into its innermost posi
fulcrum toward the outer side of the door, said
tion. The advantage _so resulting from this de
latch dog extending inwardly beyond said handle
sign can readily be appreciated by considering
Figs._ 1 and. 2 wherein diñerent door thicknesses . member fulcrum and beyond the inner surface of
35 the door for engagement with a keeper, and
are illustrated. '
spring means acting on the handle member and
'While the operation and advantages of the
latch dog to hold the latter in releasable engage
latch as thus described are no doubt obvious, the
ment with the keeper.
following explanation may be made.
4. A door latch comprising a generally U
With' the latch fully and properly installed the
spring-„23 operates to hold the various parts in 40 shaped handle member extending through an
aperture in the door with handle portions at
the positions shownin Fig. 1. If the person de
inner and outer sides of the door, pivot means
siring to open the door is on the inside he pushes
forming a vertical fulcrum for the handle mem
the handle I I, and if he is on the outside he pulls
ber at a point adjacent the plane of the inner
they handle I2._` In either case the handle member
IIe-I2 is moved to the position shown in Fig. 2, 45 surface of the door, a latch dog pivoted to the
handle member at a point spaced from said ful
and this movement causes the latch dog pivot
crum toward the outer side of the door, said latch
center I4 to> move to the left. Since the lug I1
dog extending inwardly beyond said handle mem
cannot ,so-move it acts as a fulorum and causes
ber fulcrum and beyond the inner surface of the
the hookY end of the dog to move to the right
thus, freeing it from the keeper G. Thereupon 50 door for engagement with a keeper, and spring
means creating tension between the handle mem
the door can be swung to fully open position.
ber and latch dog.
When the handle member is released the parts
5. A door latch comprising a generally U
automatically resume their original positions, and '
shaped handle member extending through an
as the door is again'closed the latch dog will snap
into place as will be evident. If it is desired to 55 aperture in ythedoor with handle portions at in
ner and outer sidesof the door, pivot means form
lock the latch this may be accomplished by a
ing a vertical fulcrum for the handle member at
small locking lever 26 pivoted as at 21 to escutch
a point adjacent the plane of the inner surface
eon 5, land adapted, when turned to engage ad
ofthe door, a latch dog pivoted to a swingable
jacent parts of handle I I and latch I3, to prevent
them from moving. Locks of this nature are well 60 Dart of the handle member at a point spaced from
said fulcrum toward the outer side of the door,
known in the art, one illustration being found in
Olson Patent No. 2,311,686, issued February 23,
said'l'atch dog extending inwardly beyond‘said
fulcrum and beyond the inner surface of the door
for engagement'y with a keeper, and meansl for
It' is‘understood that suitable modifications
may be'made in the structure as discosed, pro 65 moving the latch dog with respect to the handle
member about .the second mentioned pivot when
vided such modifications come within the spirit
the handle member is actuated on its fulcrum.
and scope of the appended claims. Having now
6. A door latch comprising inner and outer
therefore fully illustrated and described my in
vention, vwhat I claim to be new and desire. to ' y escutcheons adapted -to be secured on inner and
70 outer surfaces of a door, respectively, and about
protect by Letters Patent is:
’ '
1943.,v
„
Q
.
1. A latch’foroperation in a hole bored in a
door at -a point spaced from the edge thereof,
comprising a handle member extending through
the hole Aand, pivotally mounted for swinging
movement about an axis disposed adjacent to the 75
a recess therein, a handle member extending
through both escutcheons and through said re
cess for operation at either side of the door, a ful
.crum connecting the> handle'member to the inner
escutcheon, a latch dog pivotally `‘connected to the
'
2,410,347
5
handle member at a vpoint spaced‘from said ful
crum, and an abutment extendingfrom the outer
escutcheon into the recess for contact With the
latch dog to actuate the latter with respect to the
handle member when the handle member is man
ually operated.
7. A door latch comprising inner and outer
escutcheons adapted to be secured on inner and
outer surfaces of a door, respectively, and about
6
` manually actuated on its fulcrum, said handle
member having a slot through which said lug
extends to contact the abutment.
,
11. A door latch comprising apertured plates
adapted to be secured upon opposite surfaces of a
door having a recess extending therethrough, a
handle member extending through the plate
apertures and door recess for operation at either
side of the door, said handle member being pivot
a recess therein, a, handle member extending 10 ally mounted on one of said pla-tes, a latch dog
>through both escutcheons and through said re
pivoted to said handle member, and an abutment
cess for operation at either side of the door, a
extending from the other of said plates into the
fulcrum connecting the handle member to the
door recess for operative engagement with the
inner escutcheon, a. latch dog pivotally connected
latch dog.
to the handle member at a point spaced from said
12. A door latch comprising apertured plates
fulcrum, and an abutment extending from the
adapted to be secured upon opposite surfaces of a
outer escutcheon into the recess for contact With
door having a recess extending therethrough, a
the latch dog to actuate the latter with respect
handle member extending through the plate ap
to the handle member when the handle member
ertures and door recess for operation at either
is manually operated, said abutment having slid 20 side of the door, said handle member being pivot
ing contact with the latch dog in a direction per
ally mounted on one of said plates, a latch dog
pendicular to the inner escutcheon whereby the
pivoted to said handle member, and an abutment
latch may be adjusted to doors of various thick
extending from the other of said plates into the
nesses.
door recess for operative engagement with the
8. A door latch for a door having a cylindrical 25 latch dog, said abutment being formed by a part
bore near its swinging edge, comprising a handle
of the plate cut and bent therefrom to provide the
member extending through the bore for operation
aperture in said plate.
‘
at either side of the door, mounting means for
13. A door latch comprising a handle member
fulcruming the handle member about a vertical
adapted to extend through a door recess for oper
axis adjacent the inner end of the bore, a latch 30 ation from either side of the door, an escutcheon
pivoted to the handle at a point adjacent the
secured upon one surface of the door and provid
outer end of the bore, said latch extending in
ing a fulcrum for the handle member, a latch dog
wardly beyond said mounting means for engage
pivoted to the handle member at a point spaced
ment with a keeper, an abutment member slid
from the fulcrum, and a spring connected at one
ably inserted in the bore and for contact with 35 end to the handle member and at its other end to
the latch dog to release the latter from such
.the latch dog to place the latter under tension.
keeper when the handle member is actuated on
14. A door latch comprising a handle member
its fulcrum.
adapted to extend through a door recess for op
9. A door >latch comprising a generally U
eration irom either side of the doorran escutcheon
shaped handle extended through an aperture in 40 secured upon one surface of the door and pro
the door for operation at either side thereof,
viding a fulcrum for the handle member, a latch
means for fulcruming the handle for movement
dog pivoted to the handle member at a point
in a horizontal plane, a latch dog disposed with
spaced from the fulcrum, and a spring connected
in the handle and pivoted thereto at a point
at one end to the handle member and at its other
spaced from said fulcrum, means forming an 45 end to the latch dog to place the latter under
abutment within the door aperture, and a lug
tension, said spring also being operative to yield
projecting from the latch dog for engagement
ably hold the handle member in predetermined
With said abutment to actuate the latch dog With
position in the door recess.
respect to the handle member When the latter
15. A door latch comprising a handle member
is manually actuated on its fulcrum.
adapted to extend through a door recess for op
10. A door latch comprising a generally U
eration from either side of the door, an escutcheon
shaped handle extended through an aperture in
secured upon one surface of the door and provid
the door for operation at either side thereof,
ing a fulcrum for the handle member, a latch dog
means for fulcruming the handle for movement
pivoted-to the handle member at a point spaced
in a horizontal plane, a latch dog disposed with
from the fulcrum, and a spring connected at one
in the handle and pivoted thereto at a point
end to the handle member and at its other end to
spaced from said fulcrum, means forming an
.the latch dog to >`place the latter under tension,
abutment within the door aperture, and a lug
said spring having contact with the pivot con
projecting from the latch dog for engagement
necting the latch dog t0 the handle member.
with said abutment to actuate the latch dog with 60
J USTUS C. IRWIN.
respect to the handle member when the latter is
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