U.S. patent number 3,806,171 [Application Number 05/247,691] was granted by the patent office on 1974-04-23 for multiple dead-bolt lock.
This patent grant is currently assigned to The Raymond Lee Organization, Inc.. Invention is credited to Jose de Jesus Fernandez.
United States Patent |
3,806,171 |
Fernandez |
April 23, 1974 |
MULTIPLE DEAD-BOLT LOCK
Abstract
A multiple dead-bolt lock which is mounted in a door frame, said
bolts located so as to fit locking recesses mounted in the door.
Each dead bolt is faced with an internal rack oriented parallel to
the axis of travel of the dead-bolt, the rack mating with a pair of
spur gears which are rotatably driven by gears meshing with one
flexible shaft which may be rotated by the master locking cylinder,
or by a motor operated by a remote control mechanism.
Inventors: |
Fernandez; Jose de Jesus
(Miami, FL) |
Assignee: |
The Raymond Lee Organization,
Inc. (New York, NY)
|
Family
ID: |
22935945 |
Appl.
No.: |
05/247,691 |
Filed: |
April 26, 1972 |
Current U.S.
Class: |
292/39 |
Current CPC
Class: |
E05C
9/08 (20130101); E05B 47/0012 (20130101); Y10T
292/0843 (20150401); E05B 2047/002 (20130101); E05B
63/0052 (20130101) |
Current International
Class: |
E05C
9/08 (20060101); E05C 9/00 (20060101); E05B
47/00 (20060101); E05c 009/04 (); E05c
009/12 () |
Field of
Search: |
;292/39,32,2,3,DIG.18,DIG.44 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
41,874 |
|
Mar 1908 |
|
CH |
|
185,326 |
|
Sep 1922 |
|
GB |
|
Primary Examiner: Larkin; Geo. V.
Attorney, Agent or Firm: Podell; Howard I.
Claims
Having thus described my invention, what I claim as new and desire
to secure by Letters Patent of the United States is:
1. A multiple dead-bolt lock assembly which is mounted in a door
frame to which a door is hinged, said assembly comprising a series
of dead-bolts, mechanically linked together, with
each dead-bolt located in the door frame opposite a recess in the
door of the door frame, when the door is in the closed position, so
as to lock the door in the closed position when the dead-bolt is
moved into the adjacent door recess,
each said dead-bolt having an interior surface in the form of a
toothed rack, with the axis of the rack parallel to the direction
of travel of the dead-bolt, with each said dead-bolt engaged
with
a pair of similar spur gears mounted on axles so as to freely
rotate, said spur gears located so as to engage the teeth of the
rack of the engaged dead-bolt, with
a drive gear that is located between each pair of spur gears so as
to engage the teeth of both spur gears, each said drive gear being
located so as to be free of engagement with the tooth rack of the
associated dead bolt,
each said drive gear fixed to a common drive shaft that rotates all
the drive gears simultaneously,
said drive shaft being of a flexible nature so as to freely rotate
all drive gears despite angular misalignments between the several
drive gears, together with
a motor which is coupled to said drive shaft for the purpose of
rotating said drive gears and causing the mechanically linked
dead-bolts to travel simultaneously the same distance in the same
direction.
Description
SUMMARY OF THE INVENTION
This invention relates to a multiple dead-bolt lock mounted in the
frame of a door, and designed to lock with mating recesses in the
door.
An advantage of this invention lies in the fact that the dead-bolt
mechanisms are linked by a flexible shaft, permitting the axes of
the dead-bolts to be angularly aligned with each other.
In my invention, the dead-bolt is in the form of an L shaped
member, with a toothed rack internal surface such that the axis of
the rack is parallel to the axis of travel of the dead-bolt. A pair
of spur gears are mounted so as to mate with the dead-bolt rack;
each of said spur gears being meshed with a gear fastened to the
central shaft. The central shafts of each dead-bolt lock assembly
are rotatably fastened together by means of a flexible drive
shaft.
The flexible drive shaft may be rotated by motorized means in the
door frame, or by a locking cylinder operated by a key, said
locking cylinder being rotatably joined to said flexible shaft.
BRIEF DESCRIPTION OF THE DRAWING
The objects and features of the invention may be understood with
reference to the following detailed description of an illustrative
embodiment of the invention, taken together with the accompanying
drawing in which:
FIG. 1 is an elevation view of the multiple dead-bolt lock assembly
engaged in a door;
FIG. 2 is a cross-section of the multiple dead-bolt lock assembly
taken at line 2--2 of FIG. 1; and
FIG. 3 is a plan view of the drive gear assembly taken at line 3--3
of FIG. 2.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Turning now descriptively to the drawing, in which similar
reference characters denote similar elements throughout the several
views, FIG. 1 illustrates a door 19 locked by dead-bolt assemblies
10U, 10C and 10L mounted in the door frame 29.
As shown in FIG. 1 and FIG. 2, the individual dead-bolt assemblies
10L, 10C and 10U are of similar construction and will be referred
to in this description as dead-bolt assembly 10. They are joined
together by flexible shaft 26, which joins and rotates lock shaft
25 in each dead-bolt assembly 10. The dead-bolts 18 fit into female
recesses 31 of the latch housing 22 in the door, when the
dead-bolts 18 are set in the locking mode. Flexible shaft 26 may be
rotated by a key operated locking cylinder, mounted in the
mechanism of dead-bolt assembly 10C, or as shown in FIG. 1 and FIG.
3, shaft 26 is rotated by motor 33 that is regulated by remote
control unit 34.
As shown in FIG. 2 and FIG. 3 each lock shaft 25 is fastened to,
and rotates spur gear 60 which is in mating engagement with both
spur gears 13 mounted on shafts 12 in each dead-bolt assembly
10.
As shown in FIG. 2, spur gears 13 engage the teeth 14 of the
internal rack surface of dead-bolt 18, causing dead-bolt 18 to
travel in or out of recess 31 of door latch 22. Travel of the
dead-bolt 18 is limited by stop 15 attached to the dead-bolt 18.
Stop 15 travels in slot 16 of dead-bolt frame 17. As shown by the
dotted lines, in the locked position, dead bolt 18A is engaged in
recess 31 of door latch 22.
Flexible shaft 26 which links the lock shafts 25 of each dead-bolt
assembly 10 may be rotated by a motor drive unit 33 located in the
door frame 29 or adjoining wall area. The motor drive unit 33 is
operated by remote control mechanism 34 located at any convenient
and safe location.
Since obvious changes may be made in the specific embodiment of the
invention described herein, it is indicated that all matter
contained herein is intended as illustrative and not as limiting in
scope.
* * * * *