U.S. patent number 3,899,906 [Application Number 05/444,955] was granted by the patent office on 1975-08-19 for lock mechanism.
This patent grant is currently assigned to Adams Rite Manufacturing Company. Invention is credited to Richard L. Bradstock.
United States Patent |
3,899,906 |
Bradstock |
August 19, 1975 |
Lock mechanism
Abstract
A lock mechanism particularly for doors having a narrow stile,
wherein a unique arrangement of components provides greater
security and facilitates manufacture and installation, as
characterized by a heavy pivotally swingable bolt connected at its
inner end to one end of a rocker lever, the other end of the lever
being formed with spaced end abutment projections between which a
spring-urged latching detent is movably mounted for initial
engagement and movement to a non-latching released position by an
associated manually rotatable actuating cam extension prior to
engagement with one or the other of the abutment projections to
move the rocker lever in an appropriate direction for actuating the
bolt to its locked or unlocked position. A feature also resides in
the use of an insert type of key-operated lock cylinder assembly
rather than an assembly of the threadedly mounted casement type,
thus enabling use of a relatively thicker cam extension which can
be straddled during a portion of its movement by the associated end
of the rocker lever.
Inventors: |
Bradstock; Richard L. (Burbank,
CA) |
Assignee: |
Adams Rite Manufacturing
Company (Glendale, CA)
|
Family
ID: |
23767059 |
Appl.
No.: |
05/444,955 |
Filed: |
February 22, 1974 |
Current U.S.
Class: |
70/139;
292/200 |
Current CPC
Class: |
E05B
63/0013 (20130101); Y10T 70/5363 (20150401); Y10T
292/108 (20150401) |
Current International
Class: |
E05B
63/00 (20060101); E05B 065/06 () |
Field of
Search: |
;70/116,136,137,139
;292/5,98,100,197,200,232 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Caun; Peter M.
Attorney, Agent or Firm: Whann & McManigal
Claims
I claim:
1. A locking mechanism for a movably mounted door having a
relatively narrow stile, comprising:
a. a casing structure positionable in said stile, said structure
having an opening adapted to be positioned adjacent a vertical edge
face of said stile;
b. a bolt pivotally supported in said casing for swinging selective
movement to a retracted unlocked position within said casing and to
an extended locked position projecting through said opening;
c. a bolt actuating lever pivotally supported between its ends in
said casing for rocking movement,
one end of said actuating lever being connected with said bolt,
the other end of said actuating lever having an open ended slot
with a relatively wide outer end portion extending between spaced
end abutment projections, and an axially aligned relatively narrow
inner end portion;
d. latching means carried by said other end of said lever for
releasably latching said bolt in its extended and retracted
positions, including:
a spring-urged roller having a portion of reduced diameter between
its ends supported for outward and inward movements in said narrow
inner portion of said slot, said roller being normally biased to a
latching position extending into the relatively wide outer portion
of said slot; and
e. manually operable means including an element swingably rotatable
in opposite directions to initially release said latching means in
both the extended and retracted positions of said bolt and
thereafter rock said lever to selectively move the bolt from one of
said positions to the other of said positions, said element being
engageable with said roller and operative to move it to a
non-latching position prior to engagement with one of said abutment
projections.
2. A locking mechanism according to claim 1, wherein said roller
has opposite end portions respectively extending beyond opposite
faces of said other end of said lever.
3. A locking mechanism according to claim 2, in which spring
members respectively positioned adjacent said opposite faces of
said other end of said lever are respectively engaged with the
opposite end portions of said roller.
4. A locking mechanism according to claim 1, wherein said element
comprises a cam extension straddled during a portion of its swing
movement by said other end of said lever and being of a width to
simultaneously engage the opposite end portions of said roller.
5. A locking mechanism according to claim 4, in which said cam
extension is embodied in a key actuated lock cylinder assembly
slidably insertable endwise into an operative position penetrating
said casing and being supported by the opposite sides thereof.
6. A lock mechanism according to claim 5, wherein said lock
cylinder has a keyhole-shaped body, and said casing is formed with
a pair of spaced lugs adapted to extend on opposite sides of said
body, said lugs having clearance openings alignable with a threaded
opening in said body for receiving a retaining threaded member.
Description
BACKGROUND OF THE INVENTION
The present invention relates generally to the field of locks.
Heretofore, it has been known generally from U.S. Pat. Nos.
2,854,839 and 2,989,859 to provide a lock mechanism of the swinging
bolt type for mounting in the narrow stile of a door, and the
present invention constitutes an improvement over the lock
mechanisms disclosed in the above mentioned patents.
The lock mechanisms as disclosed in these patents are in the main
designed for use with key-actuated lock cylinder assemblies of the
casement type, and which are threadedly secured to a side plate of
the lock mechanism casing. In this type assembly, the rotatable cam
extension is of relatively thin material and is arranged to
operatively engage abutment means and detent means on one side only
of an elongated actuating lever that is pivoted at one end for
swinging movement and has its other end connected by a pin and slot
connection to the inner end of a swingable bolt. The cam extension
is positioned between the ends of the actuating lever, and the
lever as arranged requires a relatively long throw to actuate the
bolt.
In accordance with the features of the present invention, it is
proposed to modify the components and component arrangement of the
above noted patents so as to obtain a simplified mechanism, yet one
having improved operating characteristics, and which will provide
greater security. Briefly, this is accomplished by utilizing a
key-actuated lock cylinder assembly of the insert type having a cam
extension of considerably increased thickness, and which can by
symmetrically positioned at one end of a rocker lever, the other
end of the lever being connected to the inner end of the pivotally
swingable bolt. This lever arrangement produces a relatively short
bolt operating throw and has the advantage that the end associated
with the cam extension can be provided with integrally formed
spaced end abutment projections so as to operably centrally
straddle the cam extension in a manner to apply operating forces in
the actuating plane of the lever. Thus, the applied forces will be
desirably equally balanced between the ends of the pivot support of
the rocker lever.
SUMMARY OF THE INVENTION
The present invention relates generally to lock mechanisms, and is
more particularly concerned with improvements in lock mechanisms of
the type used for doors having a narrow stile.
It is one object of the herein described invention to provide a
lock mechanism of the type used for doors having a narrow stile, in
which a unique arrangement of the components provides for greater
security, more economical manufacture, and ease of
installation.
A further object is to provide a lock mechanism of the foregoing
character which utilizes a rocker lever for producing a relatively
short throw for operating a swingably pivoted bolt connected with
one end of the rocker lever, and in which the other end of the
lever is operatively connected for operation by a rotatable cam
extension of an associated lock cylinder assembly.
A further object is to provide a lock mechanism as in the
foregoing, in which the end of the rocker lever associated with the
lock cylinder is formed with integral spaced end abutment
projections between which a spring-urged latching detent is movably
mounted for initial engagement and movement to a non-latching
released position by the cam extension prior to engagement with one
of the abutments to move the rocker lever and actuate the bolt.
Another object is to provide a lock mechanism in which a bolt
actuating lever is pivoted for rocking movement, and is arranged at
one end to centrally straddle the cam extension of an associated
lock cylinder assembly during a portion of the cam extension
movement, so as to apply actuating forces substantially in the
plane of the actuating lever rather than adjacent a side face of
the lever.
Still another object is to provide a lock mechanism according to
the foregoing in which the actuating lever is operable by a cam
extension of a lock cylinder assembly of the insert type, rather
than a threadedly mounted lock cylinder assembly of the casement
type.
Further objects of the invention will be brought out in the
following part of the specification, wherein detailed description
is for the purpose of fully disclosing the invention without
placing limitations thereon.
BRIEF DESCRIPTION OF THE DRAWINGS
Referring to the accompanying drawings, which are for illustrative
purposes only:
FIG. 1 is a perspective view of a lock mechanism embodying the
features of the present invention, together with an associated door
jamb;
FIG. 2 is an enlarged longitudinal sectional view, taken
substantially on line 2--2 of FIG. 1, showing the cooperative
relationship of the lock components, the bolt being in extended
locked position;
FIG. 3 is a view similar to FIG. 2, except that the bolt is shown
in retracted unlocked position;
FIG. 4 is a fragmentary sectional view, taken substantially on line
4--4 of FIG. 5, showing details of the mounting for the cam roller
detent at the end of the actuating rocker lever; and
FIG. 5 is an enlarged longitudinal section view, taken
substantially on line 5--5 of FIG. 2
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring more specifically to the drawings, for illustrative
purposes, there is disclosed in FIG. 1 a lock casing which is
designated generally by the numeral 10. This casing is stamped or
otherwise formed to provide two sections which are staked or
otherwise interconnected to form a substantially closed housing
within which the lock mechanism is contained between side wall
portions 11 and 12. At the forward side of the casing, a face plate
13 is removably attached by means of suitable screws 14 to an
integrally formed upper casing lug 15 and an integrally formed
front wall 16. This face plate is formed to provide a rectangular
slot or opening 17 having registration with an opening 18 of the
casing front wall, and through which a bolt structure 20 is movable
to retracted and extended positions, as will hereinafter be
explained more fully.
The bolt structure 20, in its locked or extended position, is
adapted to extend into a suitable opening 21 formed in an edge face
22 of an associated jamb or another door 23. The bolt 20 is shown
as a laminated structure in which a plurality of metallic plates 24
are secured together in overlying relation by means of suitable
rivets 25 or other conventional means. The bolt is pivotally
mounted for swinging movements through an angle of substantially
90.degree. between its extended and retracted positions, a pivot
pin 26 extending through the inner end of the bolt and having its
opposite ends ridgedly supported in the side walls 11 and 12,
respectively.
As will be seen from FIG. 5, the laminated bolt includes five plate
members, the central plate being terminated short of the bolt pivot
26 to provide an intermediate inner end space 27. The plates lying
on the opposite sides of this space are apertured to receive the
pivot pin 26 therethrough and support the bolt for pivotal
rotation. These plates are further provided on each side of this
space with a generally L-shaped slot 28, and which are aligned
transversely of the bolt. Each of these slots has dwell positions
at its ends as indicated by the numerals 29 and 30, respectively.
The slot 28 is oriented so that its long leg extends in a direction
generally transversely of the bolt, while the short leg of the slot
is more nearly aligned with the longitudinal axis of the bolt.
The bolt 20 is actuated between its retracted unlocked position and
extended locked position by means of an actuating rocker lever 31
which extends longitudinally of the casing 10 and is supported
between its ends on a pivot 32 for rocking movement. One end of the
lever 31 extends into the space 27 of the bolt and carries a
transversely extending pin 33 having its ends respectively
positioned on opposite sides of the lever and extending into the
bolt slots 28, 28 for movement therein. The rocking movement of the
lever is thus constrained, and the slot 28 is so shaped as to
accommodate relative movements of the pin and the bolt during
operative movements of the actuating lever in moving the bolt
between its retracted and extended positions.
Provisions are made for positively releasably latching the bolt 20
in its retracted position and its extended position. This is
accomplished by detent means associated with the other end of the
actuating lever 31, which includes a cam roller 34 as best shown in
FIG. 5. The roller is provided with a circumferentially extending
groove 35 intermediate its ends which forms a portion 36 of reduced
diameter, this portion being slidably movable within an inner end
portion 37 of an end opening T-shaped slot (FIG. 4) as provided in
the other end of the actuating lever 31. An outermost end 38 of the
slot is of increased width and provides an end opening space which
separates integrally formed end projections 39 and 40 which lie on
opposite sides of the roller 34.
The outermost ends of the roller 34 are formed to provide axially
extending end projections 41 and 42 of reduced diameter, and which
are respectively positioned for movement in arcuate slots 43, 43,
respectively, formed in the side walls 11 and 12 of the casing.
Each slot 43 has dwell notches 44 and 45, respectively, at its
ends.
As shown in FIG. 4, the roller 34 normally extends into the space
of the slot end portion 38 between the end projections 39 and 40
and is biased in an outward direction in the slot by means of a
coiled spring 46 placed on each side of the actuating lever 31, one
end of the coiled spring being secured to an anchor pin 47 carried
by the lever, and the other end of the spring bearing against and
seated in a circumferentially extending groove 48 formed in the end
portion of the roller 34. With this arrangement, the roller end
projections 41 and 42 will be biased into the dwell notches 44, 44
in the extended position of the bolt 20, and into the dwell notches
45, 45 in the retracted position of the bolt, as respectively shown
in FIGS. 2 and 3.
Various manually operable mechanisms may be utilized for motivating
rocking movement of the lever 31, and with the lock mechanism
disclosed herein, the lever may be arranged for operation by means
of a conventional lock cylinder from either or both sides of the
door. For illustrative purposes, there is shown a conventional key
controlled lock cylinder 50 which is preferably of the insert type
rather than the casement type which is threadedly mounted in the
casing of the lock mechanism. The insert type is available in a
single form accessible form one side of the door or double form
where it is desired to lock and unlock the door from either side of
the door. The lock cylinder has a body structure of generally
keyhole configuration, the body having a cylindrical portion 51 and
a radially extending depending projecting portion 52. The body
portion is insertable endwise through aligned keyhole-shaped
openings 53, 53, respectively, formed in the side walls 11 and 12
of the casing 10. When the lock cylinder assembly is positioned in
the casing 10, the projecting portion 52 extends between internal
spaced mounting lugs 54 and 55. The assembly is secured by means of
a retaining screw 56 which is insertable through an opening 57 in
the front wall 16 of the casing, this screw being adapted to extend
through aligned openings in the lugs 54, 55, and threadedly embrace
a threaded opening in the projection 52.
The lock cylinder assembly, as shown in FIG. 5, includes in its
cylindrical body portion 51 a rotatable member 58 which carries a
radially projecting cam extension 59 which is arranged to pass
through an opening 60 in the body portion 52 during movement from
one side to the other of the assembly body. It will be observed
that the cam extension 59 is of a width such that it will engage
opposite end portions of the roller 34 during its rotative
movement. Thus, actuating forces will be applied in the plane of
the actuating member 31 by engagement of the cam extension
symmetrically with the end portions of the roller 34 on opposite
sides of the lever end portion.
The cam extension 59 serves the dual purpose of initially releasing
the latching detent and thereafter shifting the actuating lever
from one of its latched positions to the other so as to motivate
the bolt 20 from one position to the other. As shown in FIG. 2, the
end projections 41 and 42 of the roller 34 are positioned in the
dwell notches 44, 44, and the pin 33 is positioned in the dwell
position 29 of the bolt slot 28. The bolt 20 is therefore
positively latched in its extended position. Should it be desired
to move the bolt to its retracted position, the cam extension 59
would be rotated in a counter-clockwise direction until it reaches
the position shown in dotted lines. It will be seen that the
projections 39 and 40 are so oriented that the outermost end of the
cam extension will pass the projection 40 and move into engagement
with the roller 34. Continued movement of the cam extension will
cause it to force the roller from its latching position and move it
into a position which permits the cam extension to pass through the
slot end portion 38 into abutting engagement with the projection 39
and apply a force which will now shift the actuating arm 31 to the
position shown in FIG. 3. In this position, the bolt 20 will be in
a retracted position, and the pin 33 will have moved into the dwell
position 30 of the slot 28. In this position of the actuating
lever, the roller 34 will be biased outwardly so that its end
projections 40 and 41 will now be seated in the dwell notches 45,
45, as the rotation of the cam extension continues. In this
position of the actuating lever, it will be observed that the end
projection 39 has now assumed a position which will permit the end
of the cam extension to pass by and continue in its rotative
movement. The action of the components of the lock mechanism will
be similar to that just described, except in reverse order, when
rotating the cam extension in a reverse direction so as to motivate
the bolt 20 to its extended locked position as shown in FIG. 3.
From the foregoing description, it will be apparent that the lock
mechanism as described accomplishes the stipulated objects set out
for the invention.
Various modifications 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 specific forms shown
or uses mentioned, except to the extent indicated in the appended
claims.
* * * * *