U.S. patent number 3,893,740 [Application Number 05/430,179] was granted by the patent office on 1975-07-08 for locking device for a multi-drawer cabinet.
This patent grant is currently assigned to Bretford Manufacturing, Inc.. Invention is credited to William G. England.
United States Patent |
3,893,740 |
England |
July 8, 1975 |
Locking device for a multi-drawer cabinet
Abstract
A locking device for a multi-drawer cabinet with a structural
frame mounting a plurality of movable drawers, the locking device
having a mounting plate attachable to a part of the structural
frame laterally of the drawers, a locking bar pivotally mounted to
said mounting plate for movement between an inactive position,
clear of the path of movement of the drawers, and a locking
position, obstructing the opening movement of the drawers, and
coacting means on the mounting plate and locking bar for holding
the locking bar in drawer-locking position.
Inventors: |
England; William G. (Elmhurst,
IL) |
Assignee: |
Bretford Manufacturing, Inc.
(Schiller Park, IL)
|
Family
ID: |
23706386 |
Appl.
No.: |
05/430,179 |
Filed: |
January 2, 1974 |
Current U.S.
Class: |
312/216 |
Current CPC
Class: |
E05B
65/467 (20130101) |
Current International
Class: |
E05B
65/46 (20060101); E05B 65/44 (20060101); E05B
065/46 () |
Field of
Search: |
;312/216,222 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
1,322,342 |
|
Feb 1963 |
|
FR |
|
659,110 |
|
Mar 1963 |
|
CA |
|
Primary Examiner: Moore; Richard E.
Attorney, Agent or Firm: Wegner, Stellman, McCord, Wiles and
Wood
Claims
I claim:
1. A locking device for a multi-drawer cabinet having a structural
frame mounting a plurality of vertically stacked drawers
individually movable forwardly to an open position, comprising: an
elongate mounting plate having a relatively narrow width for
attachment to a part of the structural frame laterally adjacent
said drawers; a flange on said mounting plate extending outwardly
from an edge of said mounting plate and spaced laterally from said
drawers; an upright locking bar having a length to cover a forward
portion of each of the number of drawers that are to be locked
against movement and pivotally connected at an edge thereof to an
edge of said outwardly extending flange of said mounting plate for
pivotal movement between an inactive position out of the path of
movement of said drawers and a drawer locking position in front of
said drawers, said locking bar in drawer locking position and said
flange afford a lock protecting chamber with said mounting plate;
and keyoperated lock means including coacting elements on said
mounting plate and locking bar positioned entirely within the
chamber for holding said locking bar in drawer locking
position.
2. A drawer locking device as defined in claim 1 wherein said
locking bar has a top, a bottom and a side flange joined together
and projecting rearwardly from said bar to coact with said
outwardly extending flange when the locking bar is in
drawer-locking position to form a lock protecting chamber for
enclosing and preventing access to said mounting plate and the
coacting elements of said lock means.
3. A drawer locking device as defined in claim 2 wherein said top,
bottom and side flanges have integral planar members carrying
plastic buttons to define contacting elements for the fronts of
said drawers.
Description
BACKGROUND OF THE INVENTION
This invention pertains to a locking device for a multi-drawer
cabinet wherein a single locking device may lock a plurality of
drawers of varying sizes and by means of attachable structure which
may be permanently affixed to the cabinet. With the drawers of the
cabinet used for storage of valuable material, the locking device
provides a visually obvious indication as to the locked or unlocked
condition of the drawers.
Conventionally, cabinets having drawers to be locked are provided
with an internal lock system operable by a key member associated
with one of the drawers or with each drawer having a key-operated
lock. Additionally, file cabinets have been locked by the use of a
removable bar or strap which may be inserted into a retainer and
placed in obstructing relation with the drawers to prevent opening
thereof. The utilization of a lock with each drawer or internal
lock structure for a plurality of drawers is a relatively expensive
locking system for the drawers and the use of separate elements to
be inserted for locking of the drawers is a cumbersome
operation.
SUMMARY
A primary feature of the invention disclosed herein is to provide a
locking device for a multi-drawer cabinet capable of locking
multiple drawers of either uniform or differing sizes and which is
available as an attachment and, therefore, can be added to the
cabinet at any time if it is desired to lock the drawers of the
cabinet.
Another feature of the invention is to provide a locking device as
defined in the preceding paragraph wherein the locking device is in
the form of an attachment which can be secured to a part of the
cabinet structural frame disposed laterally of the drawers and has
a locking bar pivotally mounted for movement between an inactive
position, out of the path of the drawers, wherein the unlocked
condition of the drawers is visually obvious and which may be moved
to a locking position in the path of the drawers to prevent opening
thereof. Key-operated lock structure includes coacting elements
which are inaccessible when the locking device is in locked
position.
More specifically, the locking device includes a mounting plate
which may be easily installed on a part of the cabinet structural
frame laterally adjacent the drawers and a locking bar extending
for the height of the drawers to be locked and pivotally mounted to
the mounting plate for pivotal movement between the inactive
position and a drawer-locking position wherein the locking bar is
positioned in front of the drawers and with the mounting plate and
locking bar having coacting lock elements. The mounting plate and
the coacting lock elements are enclosed within the locking device
by a series of flanges carried by the locking bar which coact with
a flange on the mounting plate and to which the locking bar is
pivoted to define a closure preventing access to the interior
thereof. The series of flanges carry plastic buttons positioned for
engagement with the fronts of the drawers to prevent movement of
the drawers and without damage to the drawer fronts.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a perspective front elevational view of a multi-drawer
cabinet showing the locking device in association therewith and in
locked position;
FIG. 2 is a fragmentary front elevational view of the cabinet shown
in FIG. 1 on an enlarged scale and with the locking device shown in
open inactive position; and
FIG. 3 is a plan section taken generally along the line 3--3 in
FIG. 1 and on an enlarged scale.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The multi-drawer cabinet is indicated generally at 10 and has a
structural frame mounting a vertically-disposed series of linearly
movable drawers 11, 12, 15 and 16 for movement outwardly of the
cabinet for access to the interior thereof and with each of the
drawers having a handle member, such as member 17 for drawer 11, to
facilitate opening movement thereof. The drawers may be of uniform
height or, as shown in FIG. 1, are of varying height.
A portion of the drawer 15 is shown in FIG. 3 in association with a
front corner of the supporting frame including a vertical panel 20
of a side wall 21. The vertical panel 20 is provided with a slight
offset 22 whereby a front panel 23 of the drawer 15 may fit flush
with the front face of the vertical panel 20 of the structural
frame.
The locking device is indicated generally at 30 and has a mounting
plate 31 having a width generally corresponding to that of the
vertical panel 20 of the structural frame for flush engagement
thereagainst and for attachment thereto, as by a series of
fastening elements 32. A flange 33 extends outwardly at a right
angle from the mounting plate 31 and pivotally mounts a locking bar
34 to the mounting plate 31. The pivotal mounting is defined by a
hinge pin 35 extending through generally cylindrical-shaped and
aligned parts 36 and 37 of the outwardly extending flange 33 and
locking bar 34, respectively.
The locking bar 34 is generally planar, with a series of flanges
40, 41, and 42 at an angle thereto defining three sides of an
enclosure. The locking bar is shown in an inactive, open position
in FIG. 2, wherein the drawers are free for opening movement and
the unlocked condition thereof is visually obvious because of the
position of the locking bar. The locking device is shown in locked
position in FIGS. 1 and 3 and with the locking bar 34 moved to a
drawer-locking position disposed in front of the drawers. In this
position a series of plastic buttons 45 are positioned to lie
closely adjacent to the front panel of each of the drawers, as
shown with respect to front panel 23 in FIG. 3. These plastic
buttons are inserted into openings in inturned ends 46, 47, and 48
of the series of flanges 40-42 and with said ends defining a plane
which is in spaced parallel relation to the front panels 23 of the
drawers when the locking device is in locked position.
The locking bar 30 is maintained in drawer-locking position by
key-operated locking means including a catch member 50 secured to
the exposed face of the mounting plate 31 in a suitable manner, as
by welding, and having an end 51 spaced from the mounting plate to
receive a locking member 52 rotatably mounted on the locking bar 34
and forming part of a key-operated locking structure. The
key-operated locking structure has an outer exposed part 53 for
receiving a key with a barrel insertable through an opening in the
locking bar 34 and with a retention clip 55 engaging the barrel and
the inner face of the locking bar to retain the key-operated
locking structure in association with the locking bar.
Either at the time of purchase of the cabinet or subsequently, the
locking device may be associated with the cabinet by attaching the
mounting plate 31 to the vertical panel 20 by the fasteners 32. The
locking bar 34 has a height of sufficient extent to span the
vertical height of the number of drawers to be locked. Once the
locking device is associated with the cabinet, there is a permanent
association of all of the structure of the locking device with the
cabinet and with the locking device being positionable in either of
the positions shown in FIGS. 1 or 2. When the locking device is in
the position shown in FIG. 2, the drawers may be opened and the
unlocked condition thereof is visually obvious. When the drawers
are to be locked, the locking bar 34 is pivoted to the position
shown in FIG. 1 and a key inserted to swing the locking member 52
behind the end 51 of the catch member. With the parts in locked
relation, the coacting locking elements are inaccessible, as are
the attachment members 32 for securing the mounting plate to the
cabinet whereby the locking device is secure against tampering.
The locking device may be offered in a variety of sizes having
various height locking bar usable dependent upon the height of the
total number of drawers that are to be locked.
* * * * *