U.S. patent number 3,875,771 [Application Number 05/408,390] was granted by the patent office on 1975-04-08 for luggage strap lock.
Invention is credited to Sam Reisner.
United States Patent |
3,875,771 |
Reisner |
April 8, 1975 |
Luggage strap lock
Abstract
A simple tumbler-type lock is incorporated in a housing having
entrance and exit slots for receiving one end of a strap. The other
end of the strap is secured to the housing so that the strap may be
looped around a piece of luggage and passed through the slots into
the housing. The lock itself serves to anchor the strap within the
housing when in locked condition. Unlocking of the lock, in turn,
releases the strap so that it may be pulled from the housing to
enable opening of the luggage.
Inventors: |
Reisner; Sam (Los Angeles,
CA) |
Family
ID: |
23616100 |
Appl.
No.: |
05/408,390 |
Filed: |
October 23, 1973 |
Current U.S.
Class: |
70/18;
24/167 |
Current CPC
Class: |
A45C
13/20 (20130101); E05B 13/00 (20130101); E05B
73/00 (20130101); Y10T 70/409 (20150401); Y10T
24/4009 (20150115) |
Current International
Class: |
A45C
13/00 (20060101); A45C 13/20 (20060101); E05B
73/00 (20060101); E05B 13/00 (20060101); E05b
073/00 () |
Field of
Search: |
;70/18,19,14,15,16,69
;224/50,51,52,53,54,55,56,57,58 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Wolfe; Robert L.
Attorney, Agent or Firm: Pastoriza & Kelly
Claims
What is claimed is:
1. A luggage strap lock comprising, in combination:
a. a housing having entrance and exit slots at opposite ends;
b. a woven strap having one end secured to said housing at a point
beneath the slots and its other end adapted to encircle a piece of
luggage and be passed through said entrance slot into the housing
and out the exit slot to define a loop;
c. a lock in said housing having an exposed keyway for receiving a
key, said lock being of the tumbler type including a cylinder which
operates by rotation of said cylinder in response to insertion and
rotation of the correctly fitting key, said cylinder including an
off-center projection which is moved from a lower diametric
position to an upper diametric position upon operation of the lock;
and,
d. securing means in said housing responsive to operation of said
lock to move from a first position in which the portion of said
strap in the housing between said entrance and exit slots is
engaged in a manner preventing backward movement of the strap out
of said entrance slot, to a second position in which said strap is
released in a manner so that it can be moved out of said entrance
slot, said securing means including a cam member pivoted in the
housing for rotation about an axis at right angles to the axis of
said cylinder, said cam member having a forward portion overlying
said projection and an under surface engaging said strap in said
housing when said projection is in its lower diametric position;
and a spring biasing said cam member in a rotational directio to
hold its under surface in engagement with said strap, movement of
said projection to its upper diametric position by operation of
said lock serving to rotate said cam member about its pivot axis in
a direction against the bias of said spring in such a manner that
its under surface is raised to release said strap.
Description
This invention relates generally to security devices and more
particularly to a combination strap and lock for use with luggage,
such as suitcases.
BACKGROUND OF THE INVENTION
The key locking means by which most suitcases and attache cases
manufactured in this country are secured are relative flimsy in
design and in most cases one key will operate all of the luggage
produced by a single manufacturer. In effect, one's luggage can
usually be opened quite easily by someone who has a key of the same
luggage type.
A further problem resulting from most suitcase designs is
inadvertent flying open of the suitcase, particularly when they are
fully packed. As is well known, persons will often pack more
clothing in a suitcase than it is designed to handle and simply
apply sufficient force on the cover to squeeze the contents while
fastening the catches as well as the lock. Under rough handling, as
often occurs in present day travel, the lock mechanism can easily
fail because of the strong opening bias forces applied by the
compressed clothing in the inside of the suitcase.
BRIEF DESCRIPTION OF THE PRESENT INVENTION
With both of the foregoing problems in mind, the present invention
contemplates a combination strap and lock which will not only
provide secure locking of a suitcase, attache case, or equivalent
luggage thereby protecting against theft of valuables or even
simple vandalism, but additionally will serve to secure the piece
of luggage in its closed condition.
Briefly, the foregoing is achieved by providing a housing having
entrance and exit slots at opposite ends. A woven strap which may
be made from metal strands suitably woven together or strong fibers
has one end secured to the housing and its other end arranged to
pass through the entrance and out the exit slot of the housing. The
housing itself includes a simple tumbler lock for receiving a key.
A securing mechanism within the housing in turn is responsive to
operation of the lock to move from a first position in which the
portion of the strap in the housing between the entrance and exit
slots is engaged in a manner preventing backward movement of the
strap out of the entrance slot, to a second position in which the
strap is released in a manner that it can be moved out of the
entrance slot.
A sufficient length of strap is provided that it can be easily
encircled about most conventional pieces of luggage and "cinched"
up to fully engage around the luggage and thus hold the luggage in
closed condition against inadvertent opening even under heavy
packing. In addition, the auxiliary lock, of course, provides the
additional security.
BRIEF DESCRIPTION OF THE DRAWINGS
A better understanding of the invention will be had by now
referring to the accompanying drawings in which:
FIG. 1 is a fragmentary, perspective view of a piece of luggage,
such as a suitcase or attache case with the strap lock of the
present invention in locked position for securing the luggage;
FIG. 2 is a fragmentary, cross section taken in the direction of
the arrows 2--2 of FIG. 1 showing a securing means within the strap
lock in a first locking position;
FIG. 3 is a view similar to FIG. 2 showing the securing mechanism
in a second, unlocked position; and,
FIG. 4 is an enlarged, fragmentary, perspective view of the
securing means within the housing.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to FIG. 1, the luggage strap lock includes a housing 10
having an entrance slot 11 and an exit slot 12 at opposite ends. A
belt or strap 13 preferably comprising woven metal strands has one
end secured as at 14 to the underside of the housing below the
slots 11 and 12 and its other end arranged to pass into the
entrance slot 11, through the housing and out the exit slot 12 to
define a loop.
In FIG. 1, a fragmentary portion of the defined loop is shown
encircled about an attache case 16. As shown, a lock 17 which may
be of the tumbler type includes a key way 18 for receiving a key
19. The arrangement is such that the lock secures the strap end
portion 15 against rearward movement out of the entrance slot 11
when the lock is in locked condition but will permit forward
movement out of the exit slot 12 so that the loop of the strap may
be tightened about the luggage or attache case. On the other hand,
when the lock 17 is operated to an unlocked position, the strap end
portion 15 is released from the housing so that it may be moved out
of the entrance slot 11 so that access to the luggage is had.
The manner in which the foregoing is accomplished will be better
understood by now referring to FIGS. 2, 3 and 4.
In FIG. 2, it will be noted that the lock 17 includes a cylinder 20
provided with a projection 21 such that rotation of the cylinder
will cause the projection 21 to move from a lower diametric
position to an upper diametric position. The lock cylinder 20
itself can only be rotated in response to insertion of the
correctly fitting key in the key way 18.
Cooperating with the lock cylinder 20 and projection 21 is a
securing means in the form of a cam member 22 pivoted to the
housing at 23 for rotation about an axis at right angles to the
axis of the cylinder 20.
It will be noted that the cam member 22 includes an end portion 24
which overlies the projection 21 and in this position, the under
surface of the member 22, designated 25, is in engagement with the
strap end portion 15 within the housing. A hairpin type wire spring
26 biases the cam member 22 in a rotational direction to urge its
under surface into engagement with the strap as shown.
The position of the securing means in the form of the cam member 22
as shown in FIG. 2 constitutes a first locked position of the
member so that it is not possible to pull the strap 15 in a
rearward direction from the entrance slot 11.
Referring now to FIG. 3, there is shown the unlocked position of
the cam member 22 wherein the key 19 has been inserted in the key
way 18 and the cylinder 20 rotated 180.degree. to move the
projection 21 to its diametric upper position. This movement cams
up the end portion of the member 22 overlying the projection to
cause rotation of the cam member in a direction opposing the bias
of the spring 26. The action is such that the under surface 25 is
lifted from the strap portion thereby releasing the strap portion
so that it may be removed. In FIG. 2, the forward arrow 27
indicates that the strap 15 may be pulled from the exit slot 12
even though in locked position it being understood that rearward
movement is blocked as a consequence of the action of the cam
member 22. In FIG. 3 the arrow 28 indicates that the strap is free
to be removed from the entrance slot.
FIG. 4 illustrates the cam member 22 together with the wire biasing
spring 26 wherein it will be noted that the width of the cam member
is such that its end portion will always overlie the projection 21
from the cylinder 20. It will also be noted that the radius R1 of
the undersurface 25 of the cam member is greater than the radius R2
from the pivot point to a more rearward portion of the under
surface. As a consequence, it will be evident that when the front
end 24 is raised by the projection 21, the strap 15 will be
released whereas when in the locked position as shown in FIG. 4 the
strap 15 is thoroughly bound against rearward movement, any
increasing force tending to pull the strap in a rearward direction
causing a greater pressure to be exerted by the cam member under
surface because of the radial differences R1 and R2 as
described.
OPERATION
The operation of the luggage strap lock will be evident from the
foregoing description. Actually, a cylinder 20 may be rotationally
positioned in either its unlocked or locked position when initially
inserting the strap into the housing. Thus, assuming that the lock
is in its locked position as shown in FIG. 2, the strap can be
encircled about a suitcase or an attache case and its end 15
inserted into the entrance slot and pulled through the exit slot of
the housing since this motion bearing against the under surface 25
of the cam member 22 will tend to rotate the cam member 22 in a
clockwise direction, thereby relieving pressure on the strap. Any
rearward movement of the strap portion 15, however, will tend to
cause a binding of the cam member 22 against the strap and the
floor of the housing 10 so that rearward movement of the strap is
not possible when the mechanism is in its locked condition as
shown.
Under the foregoing arrangement, it will be evident that the strap
may be cinched tightly around the piece of luggage and the luggage
is then not only held against inadvertent opening but securely
locked against unauthorized entry.
When a person desires to gain access to the suitcase, he simply
inserts his key and rotates the cylinder 20 to the unlocked
position, which causes the projection 21 to raise against the bias
of the spring the end portion of the cam member 22 thereby raising
the under surface 25 to the position illustrated in FIG. 3. The
strap may then readily be pulled from the rear entrance slot as
described.
From the foregoing description, it will thus be evident that the
present invention has provided a very useful device for not only
providing additional security against unlawful entry of a piece of
luggage as a consequence of the presence of the lock, but in
addition will hold the luggage in a closed position against
inadvertent opening when the luggage is tightly packed.
* * * * *