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Патент USA US3041876

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July 3, 1962
s. SEGAL
3,041,866
LOCK CONSTRUCTION
Filed July 8, 1959
M
27
24a’ INVENTOR.
SAMUEL 556/11.
free
3,641,866
Patented July 3, 1962
2
tions can be resorted to which fall within the scope of the
3,041,856
claims hereunto appended.
In the drawings wherein like reference characters de
note corresponding parts throughout the several views:
LGCK CONSTRUCTION
Samuel Segal, 441 West End Ave, New York, N.Y.
Filed July 8, 1959, Set‘. No. 825,833
9 Claims. (Cl. 70-15)
FIG. 1 is an inside perspective view of a lock mecha
nism in its position as it maybe ready to be placed against
The present invention relates to a lock construction.
the back of ‘the door before the locking plate has been
Although the present invention is particularly described
latched in position and showing the tumbler with the lock
in its application to lock constructions ‘as may be applied
and key in removed position.
to door locks it has a much broader application to locks 10
FIG. 2 is a top plan view partly in section taken upon
which may be generally utilized for safes and for other
the line 2—2 of FIG. 1.
closures.
.
FIG. 2a is a fragmentary transverse sectional view
In the ordinary door lock it is customary to provide
a safety device usually manipulated from the inside of the
door so in case the tumbler lock is removed from the out
side there will be a closure automatically actuated to
showing the latched position permitting insertion of the
15
blade.
FIG. 3 is a transverse sectional view similar to FIG. 2
showing the plate in recessed position with the whole lock.
prevent a screw driver from being inserted to turn or
FIG. 4 is a one side sectional view showing the section
open the lock.
of the plate upon the line 4-4 of FIG. 2.
In one form of safety device a prong projects from
Referring to FIGS. 1 to 4, there is shown ‘an interior
the side of the interior of the lock in the inside face of 20 lock mechanism A having the locking rod B which engages
the door and it is necessary to press such device downv
the receptacle stud member C mounted on the jamb.
and over in order to permit the blade of the tumbler lock
The lock is designed to be mounted upon the inside face
to project therethrough into actuating position. These
of the door E which receives the tumbler lock face mem~
devices not only are frequently bent or readily damaged
ber F receiving the key G with a tumbler member H and
into manipulation but they are also di?‘icult to manipulate 25 the attachment screws J. The tumbler is designed to be
and are not reliable in their action.
It is among the objects of the present invention to pro
vide an automatic release device which will permit the in
sertion of the blade but at the same time if the blade of
the tumbler lock mechanism be removed will permit im
mediate closure of the recess permitting access to the
lock, itself, so that a screw driver may not be inserted to
release or open the locking mechanism.
Another object is to provide a novel locking arrange
ment in which the safety device for closure of the lock
in case of external removal of the tumbler arrangement
will be achieved without projections from the interior
of the lock and without the use of projecting stud or
leaf elements readily bent out of position or damaged by
the user thereof.
attached to the back plate K which ‘acts as an abutment
plate which serves to release the safety mechanism L.
The safety mechanism L includes a shallow box-like en
closure M which may be keyed to the back of a lock
30 structure A and which is provided with a sliding plate
N having a driving spring D. The plate N is normally
locked in retracted position as indicated in FIG. 2A until
it is inserted and by insertion it will be released by con
tact with the back plate K but will be prevented from
sliding to the left, as shown in FIGS. 2 and 3 by the blade
Q projecting inwardly from the tumbler lock H.
A sleeve bearing R is also provided projecting through
said plate within which the blade Q will turn, serving both
to prevent wear by the blade Q against the edges of plate
40 N and also serving as a pivot upon which the blade may
Still further objects and advantages will appear in the
oscillate when it is depressed upon movement against the
more detailed description set forth below, it being under
back plate K.
‘
stood, however, that this more detailed description is
The safety device itself will have the top wall 10‘, the
given by way of illustration ‘and explanation only and not
end wall 11 and the side walls 12 which may have down
by way of limitation, since various changes therein may 4:5 wardly projecting prongs 13 which project :into recesses
be made by those skilled in the art without departing
14 in the plate element 15 of the lock.
from the scope and spirit of the present invention.
The opening 16 in the back plate 10 will receive the
In accomplishing the above objects it has been found
blade Q of the tumbler lock and the sleeve R will have
most satisfactory according to one embodiment of the
a barrel or cylinder member 17 within which the blade
present invention to form the safety device so that it is 50 Q will be turned. The ?ange or outwardly projecting lip
all included in a shallow enclosure readily keyed to the
18 will act as a pivot mount upon which the plate N may
back of the main lock and which will be readily actuated
rock. Normally the sleeve 17 will ?t through an open
into released position when the lock is assembled against
ing in the plate and protect the edges of the opening from
the back plate of the door.
wear against the side edges of blade Q and at the same
In accomplishing this, there is provided a slidable or 55 time will permit a rocking motion as indicated by the
laterally movable plate in said shallow receptacle pro
double arrow 20, preventing the plate from rubbing either
vided with a biasing spring which will normally be locked
against the plate 15 on the back of the lock or the top
wall 10 of the box enclosure M.
t
in retracted position but which when pressed against the
The reciprocator plate N has a recessed portion in
back plate on a door will be moved to release position so
that it may close the opening into the lock if the tumbler 60 which the coil spring D is received. This coil spring will
normally bias or tend to press the locking plate or en
be removed together with its knife blade. Normally, it
closure plate N in the direction of the arrow 23 (see
is sumcient if the sliding plate be recessed at one corner
FIG. 3). The sliding plate N has a downturned oblique
thereof and be driven by a stress spring so that the at
locking tongue portion 24 which when the plate is locked‘
tachment of the lock to the back of the door will auto
65 in open position will latch in the opening 25 in the wall
matically release the sliding plate mechanism.
10 of the enclosure M.
‘
With the foregoing and other objects in View, the in
The end of the wall 10 has projecting out of the end
vention consists of the novel construction, combination
of the enclosure M the oblique actuating tongue member
and arrangement of parts as hereinafter more speci?cally
27. Normally the locking of the oblique tongue 24 in
described, and illustrated in the accompanying drawings, 70 the opening‘25 will cause the sleeve 17 to match the open
wherein is shown an embodiment of the invention, but it
ings 16 and the opening 29 in the plate 15 through which
is to be understood that changes, variations and modifica
the blade projects to actuate the lock A. However, it is
aoanaas
3
desired to provide that in case the external tumbler F is
removed that this opening 29 be closed so that a screw
driver can not be inserted to open the lock. This is ac
complished by the safety device of the present application
indicated at L in FIGS. 1 to 4.
In assembly the tumbler H is ?rst assembled in position
with the back plate K by means of the side screws I
which extend through the door structure E and also
through the ears 41 at the side of the tumbler body 42.
Then the lock A may be ‘attached by screws extending
through the openings 43 and 44 (see PEG. 1) at the back
of the door. When this occurs the nose 28 of the lock
of the closure having an opening to receive said blade,
said blade projecting into said opening and operating said
lock, said device being positioned between said tumbler and
lock and preventing access to said lock when said tumbler
and blade are removed, said device including a shallow
box on the back of the lock, a sliding plate in the box,
coil spring means biasing said plate in one direction to
close off said lock opening, said plate being recessed at
one corner thereof to receive said spring, and a latch con
sisting of an obliquely disposed outstruck tongue to hold
said plate against movement in said direction, said latch
consisting of an outstanding tongue and a corresponding
opening in the top of said box, said back plate on the back
ing plate will be pressed inwardly as indicated by the
of the door upon mounting of the lock upon the back of
arrow 45 (FIG. 3) releasing the oblique locking tongue
24 from the opening 25. This will cause the plate N to 15 the door serving to contact said plate and unlatch said latch
to permit said plate to be moved in said direction under
be free to move in the direction 23 under the in?uence of
the action of said biasing means.
the stress spring D. However, it will be held in position
3. A safety device for a lock of the type to vbe posi
by extending the blade Q through the opening 29 into the
tioned on the back of a door having a back plate to which
lock structure A. However, it through any ‘manipula
tion the external tumbler lock F is removed or drilled 20 a tumbler lock member is connected by attachment screws
away and the blade Q is withdrawn, the plate N will im
extending transversely through an opening in the body of
the door and also of the type having an external key ac
tuated tumbler on the exterior of the closure with an in
ternally projecting operating blade and a lock on the in
lock A, and preventing insertion of a screw driver to
25 terior of the closure having an opening to receive said
operate the locking mechanism and open the door.
blade, said blade projecting into said opening and operat
It is thus apparent that by the use of this relatively
mediately move to the left in the direction of the arrow
23 blocking the opening 29, which permits entry to the
simple, compact, automatically actuated device the lock
is protected against removal of the external tumbler ar
rangernent H and it is impossible to insert a screw driver
to operate the lock after the blade Q and tumbler H
ing said lock, said device being positioned between said
tumbler and lock and preventing access to said lock when
said tumbler and blade are removed, said device includ
ing a shallow box on the back of the lock, a sliding plate
in the box, means biasing said plate in one direction to
close off said lock opening and a latch to hold said plate
against movement in said direction, said plate having an
outstanding obliquely directed member automatically re~
have been withdrawn.
The setting of the plate N does not depend upon any
manual manipulation of any prong or blade projecting
from the end of the lock and the plate is automatcially
leasing said latch upon assembly of the lock against the
set in released position ready to close the opening 29 35 closure, said back plate on the back of the door Upon
as shown as the lock A has received the blade Q and been
mounting of the lock upon the back of the door serving
assembled against the back of a door with the tumbler H
to ‘contact said plate and unlatch said latch to permit said
in position.
While there has been herein described a preferred
form of the invention, it should be understood that the
same may be altered in details and in relative arrange
ment of parts within the scope of the appended claims.
Having now particularly described and ascertained the
nature of the invention, and in what manner the same is
to be performed:
What is claimed is:
1. A safety device for a lock of the type to be positioned
on the back of a door having a back plate to which a
tumbler lock member is connected by attachment screws
plate to be moved in said direction under the action of
said biasing means.
4. A safety device for a lock of the type to be posi
tioned on the back of a door having a back plate to which
a tumbler lock member is connected by attachment screws
extending transversely through an opening in the body
of the door and also of the type having an external key ac
tuated tumbler on the exterior of the closure with an inter
nally projecting operating blade and a lock on the interior
of the closure having an opening to receive said blade,
said blade projecting into said opening and operating
said lock, said device being positioned between said tum
extending transversely through an opening in the body of 50 bler and lock and preventing access to said lock when
the door and also of the type having an external key ac
tuated tumbler on the exterior of the closure with an inter
nally projecting operating blade and a lock on the interior
of the closure having an opening to receive said blade, said
blade projecting into said opening and operating said lock,
said device being positioned between said tumbler and
said tumbler and blade are removed, said device including
a shallow box on the back of the lock, a sliding plate in
the box, coil spring means biasing said plate in one direc
tion to close off said lock opening, said plate being
recessed at one corner thereof to receive said spring, and
a latch consisting of an obliquely disposed outstruck
lock and preventing access to said lock when said tumbler
tongue to hold said plate against movement in said di
and blade are removed, said device including a shallow
rection, said plate having a central opening through
box on the back of the lock, a sliding plate in the box,
which said blade passes and said opening receiving a
coil spring means biasing said plate in one direction to 60 bearing sleeve for said blade to prevent contact between
close off said lock opening, said plate being recessed at one
the blade'and the plate, said back plate on the back of
corner thereof to receive said spring, and a latch consist
the door upon mounting of the lock upon the back of the
ing of an obliquely disposed outstruck tongue to hold
door serving to contact said plate and unlatch said latch
said plate against movement in said direction, said back
to permit said plate to be moved in said direction under the
plate on the back of the door upon mounting of the lock
action of said biasing means.
upon the back of the door serving to contact said plate
5. A safety device for a lock of the type to be posi
and unlatch said latch to permit said plate to be moved
tioned on the back of a door having -a back plate to which
in said direction under the action of said biasing means.
a tumbler lock member is connected by attachment screws
2. A safety device for a lock of the type to be posi
extending transversely through an opening in the body of
tioned on the back of a door having a back plate to which
the door and also of the type having an external key ac
a tumbler lock member is connected by attachment screws
tuated tumbler on the exterior of the closure with an in
extending transversely through an opening in the body
ternally projecting operating blade and a lock on the in
of the door and also of the type having an external key ac
terior of the closure having an opening to receive said
tuated tumbler on the exterior of the closure with an inter
blade, said blade projecting into said opening and operat
nally projecting operating blade and a lock on the interior
ing said lock, said device being positioned between said
3,041,866
6
tumbler and lock and preventing access to said lock when
said tumbler and blade are removed, said device includ
ing a shallow box on the bass of the lock, a sliding plate
in the box, coil spring means biasing said plate in one di
open side with a spring biasing the rear end of said plate
out of said box and latch means to hold said plate against
locking movement during mounting and automatically to
release said plate after mounting, and a plate opening in
said plate to match said receptacle opening and receiving
said blade to hold said plate against movement by said
spring when said blade is in position and releasing said
rection to close off said lock opening, said plate being
recessed at one corner thereof to receive said spring, and
a latch consisting of an obliquely disposed outstruck
tongue to hold said plate against movement in said direc
tion, said plate having a central opening through which
said blade projects and mounting means for said plate so
that said plate shall be substantially free from frictional
plate to closure position closing said receptacle opening
when the blade is removed.
7. The lock construction of claim 6, said plate open
ing having a bearing sleeve to hold said plate centrally
contact with the lock or with the box and may be readily
in position to prevent bearing of the edges of the blade
moved 'by said spring, said back plate on the back of the
against the edges of the opening in the plate.
door upon mounting of the lock upon the back of the door
8. The lock construction of claim 6, said plate at its
serving to contact said plate and unlatch said latch to per
forward end away from said spring having two out-turned
mit said plate to be moved in said direction under the ac 15 oblique latch tongues, one to latch and hold the recep
tion of said biasing means.
tacle and plate openings aligned during installation and
6. A safety tampenproof tumbler type lock construc
tion of the type having a tumbler key receiving front mem
the other to release the plate after installation and inser
tion of the blade through the aligned openings.
9. The lock construction of claim 6, said plate being
ber accessible on the ‘front of a door with a rearwardly
extending rectangular blade and a box receptacle carrying
recessed at its rear end and a coil spring being positioned
in said recess and reacting vbetween the end of the recess
in the plate and the rear end of the partial enclosure
box.
the lock operating mechanism on the rear of the door, the
rear end of said blade extending into a receptacle opening
in the receptacle and upon rotation of the blade operating
said lock mechanism, said construction including a temper
proof, spring-closed closure plate, normally latched in 25
open position, to close off said opening automatically and
prevent insertion of a screw driver to open the lock mech
anism when the blade is removed from the front of the
door, said plate having a partial enclosure box with an
30
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,764,898
1,904,882
2,942,449
Segal _______________ __ June 17, 1930
Prior ________________ __ Apr. 18, 1933
White ______________ __ June 28, 1960
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