U.S. patent number 6,443,417 [Application Number 09/801,232] was granted by the patent office on 2002-09-03 for anti-theft device for lap top computer.
Invention is credited to Steve N. Galant.
United States Patent |
6,443,417 |
Galant |
September 3, 2002 |
Anti-theft device for lap top computer
Abstract
An anti-theft device for securing a lap top computer to a
support member, the device having a rigid securing member. The
rigid securing member has a back, side and front restraining
members defining an elongate opening dimensioned to slidably
receive a monitor of the lap top computer therethrough when the
computer is in the open position. The device further includes a
locking assembly having a first part rigidly coupled to the
securing member and a second part which can be anchored to the
support member, the first and second parts being movable together
into a securing position to clamp the lap top computer to the
support member, and apart into a release position to allow the lap
top computer to be removed. A second securing member is provided to
secure the lap top in the closed position.
Inventors: |
Galant; Steve N. (Kleinburg,
Ontario, CA) |
Family
ID: |
25180539 |
Appl.
No.: |
09/801,232 |
Filed: |
March 7, 2001 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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563184 |
May 2, 2000 |
6308928 |
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Current U.S.
Class: |
248/553; 70/19;
70/58 |
Current CPC
Class: |
E05B
73/0082 (20130101); Y10T 70/411 (20150401); Y10T
70/5009 (20150401) |
Current International
Class: |
E05B
73/00 (20060101); E05B 073/00 () |
Field of
Search: |
;248/551,552,553
;70/18,19,58,164,209 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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2246139 |
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Feb 2000 |
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CA |
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2281466 |
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Feb 2000 |
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CA |
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Primary Examiner: Braun; Leslie A.
Assistant Examiner: Szumny; Jon
Attorney, Agent or Firm: Ridout & Maybee LLP
Parent Case Text
This application is a continuation-in-part of U.S. patent
application Ser. No. 09/563,184 filed May 2, 2000 now U.S. Pat. No.
6,308,928 for Anti-Theft Device for Lap Top Computer.
Claims
I claim:
1. An anti-theft device for securing a lap top computer to a
support member, the lap top computer having a first portion at
second portion pivotally connected together for movement between an
open position in which the first portion extends at an angle from
the second portion, and a closed position in which the first
portion and second portion are substantially parallel to and
adjacent to each other, the device comprising a rigid securing
member having back, side and front restraining members defining an
elongate opening dimensioned to slidably receive the first portion
therethrough; and a locking assembly having a first part rigidly
coupled to said securing member and a second part adapted to be
anchored to the support member, said first and second parts being
movable together into a securing position, and apart into a release
position; wherein, when a lap top computer is positioned on the
support member in an open position with the first portion extending
through the elongate opening and the locking assembly is moved to
the securing position, the second portion is confined between the
securing member and the support member and the first portion is
confined within said elongate opening to prevent removal of the lap
top from said support member, and when the locking assembly is
moved to the release position, the securing member is spaced from
the support member a distance which allows the lap top computer to
be removed from the support member.
2. The anti-theft device according to claim 1 wherein one of said
first and second parts comprises a leg, and the other of said first
and second parts comprises a locking device telescopically
engageable with and securable to said leg at a selected one of a
plurality of locations along the length of said leg.
3. The anti-theft device according to claim 2 wherein said leg
comprises a plurality of ratchet teeth spaced along the length
thereof, and said locking device has a pawl movable between a
locked position in which the pawl engages a selected one of said
ratchet teeth thereby preventing separation of said securing member
and said second part, and an unlocked position in which said pawl
is disengaged from said teeth such that said securing member and
said second part may be slid apart.
4. The anti-theft device according to claim 3 wherein the locking
device includes a key lock which actuates the pawl to engage and
disengage the ratchet teeth.
5. The anti-theft device according to claim 3 wherein the pawl is
spring loaded to permit the locking device to be telescoped onto
said leg while preventing it to be removed therefrom when the
locking device is in said locked position.
6. The anti-theft device according to claim 2 wherein said securing
member includes a pair of said side restraining members, each side
restraining member extending from a respective opposite end of said
back restraining member, and a pair of said front restraining
members, each extending from a respective one of said side
restraining members.
7. The anti-theft device according to claim 2 wherein said first
part includes said leg and said second part includes said locking
device.
8. The anti-theft device according to claim 7 for securing a lap
top to a support member having an upper surface, a lower surface,
and a predetermined hole extending through the support member from
the upper to the lower surfaces, wherein said leg extends from said
securing member and is insertable through said hole from above the
support member so as to extend partly below said support member,
and said locking device is securable to said leg below said support
member and engageable with the lower surface when so secured to
prevent removal of the securing member.
9. The anti-theft device according to claim 8 for securing a lap
top to a support member having an upper surface, a lower surface,
and first arid second spaced apart predetermined holes extending
through the support member from said upper to said lower surfaces,
wherein said leg is a first leg and the device comprises a second
leg parallel to said first leg, the first and second legs extending
from said securing member for insertion through said first and
second holes, respectively, said first and second legs being spaced
apart a distance such that the legs can straddle a width of the lap
top computer.
10. The anti-theft device according to claim 9 wherein said
securing member includes a pair of said side restraining members,
each side restraining member extending from a respective opposite
end of said back restraining member, and a pair of said front
restraining members, each extending from a respective one of said
side restraining members.
11. The anti-theft device according to claim 10 wherein said first
and second legs extend downwardly from respective said side
restraining members.
12. The anti-theft device according to claim 9 comprising a further
rigid securing member having an elongate intermediate member with
first and second stop members located at opposite ends thereof for
restraining movement of the lap top computer, said rigid securing
member and further securing member having interlocking portions and
being positionable generally transverse to each other when
interlocked together, wherein when the lap top is in the closed
position and positioned between the holes it can be secured to the
upper surface of the support member with said legs and said first
and second stop members restraining movement of the lap top
computer parallel to the upper surface, and said rigid securing
member and said intermediate member restraining upward movement of
the lap top computer.
13. The anti-theft device according to claim 2 wherein said first
part includes said locking device and said second part includes
said leg.
14. The anti-theft device according to claim 13 wherein said
securing member includes a pair of said side restraining members,
each side restraining member extending from a respective opposite
end of said back restraining member, and a pair of said front
restraining members, each extending from a respective one of said
side restraining members.
15. The anti-theft device according to claim 14 wherein said
locking device is rigidly attached to one of said side restraining
members.
16. The anti-theft device according to claim 13 wherein said leg
comprises a plurality of ratchet teeth spaced along the length
thereof, and said locking device has a pawl movable between a
locked position in which the pawl engages a selected one of said
ratchet teeth thereby preventing separation of said securing member
and said second part, and an unlocked position in which said pawl
is disengageable with said teeth such that said securing member and
said second part may be slid apart.
17. The anti-theft device according to claim 13 for securing a lap
top to a support member having an upper surface, a lower surface,
and a predetermined hole extending through the support member from
said upper to said lower surfaces, wherein said second part
comprises an anchor member rigidly coupled to said leg, said leg
being insertable through said hole from below the support member so
as to extend partly above said support member, and said locking
device being securable to said leg above said support member, said
anchor member being engageable with the lower surface such that
removal of the securing member from the support member is prevented
when the leg and locking device are secured together.
18. The anti-theft device according to claim 17 wherein said anchor
member is a plate provided with a plurality of apertures for using
in securing said anchor member to one of said upper and lower
surfaces and said leg extends upwardly from said plate in a normal
direction when the plate is so secured and said locking device is
securable to said leg above the support member to prevent said
securing member from being removed from said support member.
19. The anti-theft device according to claim 1 wherein said
securing member includes a pair of said side restraining members,
each side restraining member extending from a respective opposite
end of said back restraining member, and a pair of said front
restraining members, each extending from a respective one of said
side restraining members.
20. An anti-theft device for securing a lap top computer to a
support member, the lap top computer having a monitor portion and a
keyboard portion pivotally connected together by a hinge for
movement between an open position in which the monitor portion
extends at an angle from the keyboard portion, and a closed
position in which the monitor portion and keyboard portion are
substantially parallel to and adjacent to each other, the device
comprising a rigid securing member having a back restraining
member, a pair of said side restraining members extending from a
respective opposite end of said back restraining member, and a pair
of front restraining members extending from respective said side
restraining members, said back, side and front restraining members
defining an elongate opening dimensioned to slidably receive the
monitor portion therethrough; and a locking assembly having a first
part rigidly coupled to said securing member and a second part
adapted to be anchored to the support member, one of said first and
second parts comprising a leg, and the other of said first and
second parts comprising a locking device telescopically engageable
with and securable to said leg at a selected one of a plurality of
locations along the length of said leg to bring said locking
assembly into a securing position, said leg and locking device
being movable apart to bring said locking assembly into a release
position; whereby, when the second part is anchored to the support
member, a lap top computer is resting on the support member in an
open position adjacent to the second part, and the locking assembly
is moved to the securing position, the keyboard portion is confined
between the securing member and the support member and the monitor
portion is confined within said elongate opening to prevent removal
of the lap top from said support member, and when the locking
assembly is moved to the release position, the securing member is
moved away from the support member a distance which allows the lap
top computer to be removed from the support member.
Description
BACKGROUND OF THE INVENTION
The present invention relates to an anti-theft device for securing
a lap top computer to a support member such as a desk top.
A variety of techniques and apparatus have been developed over the
years to prevent the unauthorized removal of computer equipment. A
number of anti-theft devices have been developed specifically for
tower style and desk top computers, as depicted in U.S. Pat. No.
5,085,395 issued Feb. 4, 1992 to Fater et al, and U.S. Pat. No.
4,585,202 issued Apr. 29, 1986 to Parsekin. Such devices are not
designed to be used with clam shell style lap top computers which
are most often the targets of computer theft.
Anti-theft devices which use flexible cables to secure either lap
top computers or tower and desk top style computers are also known.
However, such devices offer limited security as the cables can
often be cut relatively easily.
There is a need for an anti-theft device that can be used to secure
a lap top computer to a work surface or support member, and which
provides an increased level of security over traditional cable
devices.
It is also desirable to provide a lap top computer anti-theft
device which allows for the easy authorized removal of a lap top
computer and is cost-effective to manufacture. It is also desirable
to provide an anti-theft device that can be used to secure a lap
top computer in both the open and closed positions.
SUMMARY OF THE INVENTION
Accordingly, the present invention provides an anti-theft device
for securing a lap top computer to a support member, the lap top
computer having a first portion and a second portion pivotally
connected together for movement between an open position in which
the first portion extends at an angle from the second portion, and
a closed position in which the first portion and second portion are
substantially parallel to and adjacent to each other. The device
includes a rigid securing member having back, side and front
restraining members defining an elongate opening dimensioned to
slidably receive the first portion therethrough. The device further
includes a locking assembly having a first part rigidly coupled to
the securing member and a second part adapted to be anchored to the
support member, the first and second parts being movable together
into a securing position, and apart into a release position. When a
lap top computer is positioned on the support member in an open
position with the first portion extending through the elongate
opening and the locking assembly is moved to the securing position,
the second portion is confined between the securing member and the
support member and the first portion is confined within the
elongate opening to prevent removal of the lap top from the support
member. When the locking assembly is moved to the release position,
the securing member is moved away from the support member a
distance which allows the lap top computer to be removed from the
support member.
The anti-theft device may include a further rigid securing member
adapted to interlock with and be positioned generally transversely
to said rigid securing member to secure a lap top in the closed
position to a support member.
BRIEF DESCRIPTION OF THE DRAWINGS
For a better understanding of the invention, and to show how it may
be carried into effect, reference will now be made, by way of
example, to the accompanying drawings, in which:
FIG. 1 is an isometric view of an anti-theft device in accordance
with a first preferred embodiment of the invention;
FIG. 2 is an isometric view of the anti-theft device of FIG. 1
shown in use securing a lap top computer in the open position to a
desk top;
FIG. 3 is a front view of the anti-theft device of FIG. 1 shown in
use securing the open lap top computer to the desk top;
FIG. 4 is an isometric view showing the anti-theft device of FIG. 1
in use securing the lap top computer in the closed position to the
desk top;
FIG. 5 is an enlarged partial cross-sectional view taken generally
along line V--V of FIG. 1 showing a locking assembly of the device
being actuated to bring the locking assembly into a securing
position;
FIG. 6 is a view similar to the view of FIG. 5, showing the locking
assembly being moved to a release position;
FIG. 7 is an enlarged cross-sectional view of the locking assembly
taken along line VII--VII of FIG. 3;
FIG. 8 is an isometric view of a second preferred embodiment of an
anti-theft device in accordance with the present invention;
FIG. 9 is an isometric exploded view of an anti-theft device
according to a third preferred embodiment of the invention for use
in securing an open lap top to a desk top; and
FIG. 10 is a view similar to the view of FIG. 9 showing an
alternative method of securing a locking leg of the anti-theft
device of FIG. 9 to the desk top.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to FIGS. 1 and 2, an anti-theft device, indicated
generally by reference numeral number 10, for securing a lap top
computer 12 to a support member such as a desk top 14, is shown.
The lap top 12 has a first portion in the form of a monitor portion
16 and a second portion in the form of a keyboard portion 18
pivotally connected to the monitor portion 16 for movement about a
hinge 19 between an open position (shown in FIGS. 2 and 3) in which
the monitor portion 16 extends at an angle from the keyboard
portion 18, and a closed position (shown in FIG. 4) in which the
monitor portion 16 and keyboard portion 18 are substantially
parallel to and adjacent to each other.
The device 10 includes a rigid securing member designated generally
by reference numeral 20 made of hardened tubular steel provided
with a vinyl coating. The securing member 20 has an elongate back
restraining member 22 and a pair of U-shaped side restraining
members 24, 26 extending from respective opposite ends of the back
restraining member 22. The securing member 20 also has a pair of
front restraining members 28, 30 extending inwardly from the front
ends of the respective side restraining members 24,26 in generally
parallel relationship to the back restraining member 22. The
securing member 20 is dimensioned to define an elongate opening 32
(FIG. 1) which can slidably receive the monitor portion 16
therethrough.
The device 10 also includes a locking assembly indicated generally
by numeral 34 in FIG. 1 having a first part in the form of a first
leg 36 made of a hardened tubular steel rod rigidly attached to and
extending downwardly from the side restraining member 24 of the
securing member 20. The locking assembly also has a second part in
the form of a locking device 38 which is telescopically engageable
with and securable to the first leg 36 at a selected one of a
plurality of locations along the length of the leg 36, as will be
described in more detail below.
In this embodiment, the anti-theft device 10 also has a second leg
40 rigidly attached to and extending downwardly from the other side
restraining member 26. The second leg 40 has a smooth outer
exterior, and extends parallel to and is spaced from the first leg
36 a distance such that the legs 36, 40 can straddle the width of
the lap top computer 12. As can best be seen with reference to FIG.
3, to use the device 10, the lap top 12 is placed on an upper
surface 42 of the desk top 14 between a pair of spaced apart
predetermined holes 44, 46 extending through the desk top 14 from
the upper surface 42 through to a lower surface 48 thereof. The
holes 44, 46 are reinforced by plastic tubular plugs 50, 52 which
have been inserted into the holes 44, 46 and which also facilitate
the insertion and removal of the device 10 in and from the holes
44, 46. The securing member 20 is then slid over the monitor
portion 16 so that the monitor portion 16 is received within the
elongate opening 32. At the same time, the first and second legs
36, 40 are inserted in the tubular plugs 50, 52, respectively, and
moved downwardly to extend partly below the desk top 14 until the
securing member 20 engages the top of the keyboard portion 18. The
first leg 36 and the locking device 38 are moveable together into a
securing position by telescoping the locking device 38 upwardly and
locking it to the first leg 36 below the desk top 14 to clamp the
keyboard portion 18 and desk top 14 together between the securing
member 20 and locking device 38. When so clamped, the monitor
portion 16 is confined within the elongate opening 32. Thus,
forward and upward motion of the lap top 12 are restricted by the
front restraining members 28, 30. The back restraining member 22
restrains rearward motion. Sideways motion is similarly restricted
by the side restraining members 24, 26. Removal of the lap top 12
is thus prevented. Clearly, for the device 10 to work, the locking
device 38 must be dimensioned to be larger than the hole 44 with
the tubular plug 50 mounted therein so that an attempt to remove
the securing member 20 from the desktop 14 would be prevented by
the locking device 38 engaging the lower surface 48 of the desk top
14, thereby restricting further upward motion of the securing
member 20. It will be appreciated that when the locking device 38
is secured to the first leg 36, the locking device 38 is
effectively anchored to the desk top 14, thereby anchoring other
portions of the device 10 to which the locking device 38 is
secured.
When it is desired to remove or transport the lap top 12, the
locking device 38 is disengaged from the first leg 36 and the
securing member 20 is moved to a release position by lifting it
upwardly and away from the desk top 14 a distance which would allow
the lap top computer 12 to be removed. Of course, the securing
member 20 may be removed completely and set aside when not in
use.
The locking assembly 34 will now be described in detail with
reference to FIGS. 5 to 7. As seen in FIGS. 5 and 6, the first leg
36 includes a plurality of ratchet teeth 54 spaced along the length
thereof. The locking device 38 has a hardened steel lock housing 55
having a blind hole 57 in which is situated a spring-loaded pawl
56. The spring-loaded pawl 56 is normally biased into a locked
position (shown in FIGS. 5 and 7) under the influence of a spring
58. In this position, the spring 58 biases the pawl 56 part way
into a passageway 60 of the locking device 38 for receiving the
first leg 36 therethrough. The pawl 56 presents an inclined surface
62 (labelled only in FIG. 5) for meeting a frusto-conical surface
63 of the ratchet teeth 54. Such allows the first leg 36 to be
advanced within the passageway 60 relative to the locking device 38
in the direction of arrow 64 shown in FIG. 5. When moved in this
direction the pawl 56 is pushed into the blind hole 57, by each
ratchet tooth 54 passing the pawl 56. As each ratchet tooth 54
passes the pawl 56, the spring 58 urges the pawl 56 back into an
annular space 67 between adjacent ratchet teeth 54. When the pawl
56 is positioned in the annular space 67, movement of the first leg
36 in a direction opposite to the direction shown by arrow 64,
relative to the locking device 38, is blocked by the engagement of
a transversely-extending planar lower surface 68 of the pawl 56
with a portion of a planar annular surface 70 of a subject ratchet
tooth 54 (as shown in FIG. 6). Thus, the spring-loaded pawl 56
permits the locking device 38 to be telescoped onto the first leg
36 while preventing the locking device 38 from being removed
therefrom when the locking device 38 is in the locked position.
To unlock the device 38, a key 72 (shown in FIGS. 1 and 3) is
inserted into a key hole in a key lock cylinder 74 which is seated
and retained in a key lock cylinder hole 75 by a locking pin 88.
The key lock cylinder hole 75 extends at a right angle to the blind
hole 57. The key lock cylinder 74 has a torque blade 76 which
extends into a groove 78 formed in the pawl 56 to bear against a
torque blade surface 80 of the pawl 56. Rotating the key 72
clockwise, causes the torque blade 76 to rotate and displace pawl
56 into the blind hole 57, to compress the spring 58, and away from
the passageway 60 (as shown in FIG. 6). In this position, the
locking device 38 is unlocked and the first leg 36 may be removed
from the steel lock housing 55 as shown by arrows 84, 86 in FIG. 6.
Releasing the key 72 causes the pawl 56 to enter the passageway 60
under the influence of the spring 58.
Referring now to FIGS. 1 and 4, it will be seen that the device 10
has a second rigid securing member 90 for use in securing the lap
top computer 12 in a closed position. The second securing member 90
includes an elongate intermediate member or bar 92 with first and
second stop members 94, 96 located at opposite ends thereof. In the
embodiment shown, the first and second stop members 94, 96 are each
downwardly arcuate bars. The second securing member 90 and first
securing member 20 are each configured such that they interlock
with each other. In particular, in the illustrated embodiment, the
back restraining member 22 has a raised central portion 98 under
which the intermediate bar 92 can pass. An arcuate member 100 is
provided on the upper side of the intermediate bar 92 and together
they define an opening 102 through which the back restraining
member 22 passes.
With reference to FIG. 4, the closed lap top 12 is positioned
between the holes 44, 46 such that it can be straddled by the first
and second legs 36 and 40 when the legs are inserted through the
holes 44, 46. Prior to mounting the first securing member 20 to the
desk top 14, the first and second securing members 20 and 90 are
interlocked by threading one of the legs 36, 40 through the opening
102 of the second securing member 90 until the intermediate bar 92
is located under the raised central portion 98 of the back
restraining member 22. The first and second securing members 20, 90
are then secured to the desk top 14 over the lap top computer 12 as
illustrated by inserting the first and second legs 36, 40 through
the holes 44, 46 in the desk top 14 until the securing members 20,
90 contact an upper surface of the lap top computer 12. The locking
device 38 is then secured to the first leg 36 as discussed
above.
The raised central portion 98 of the back restraining member 22
provides clearance for the intermediate bar 92 to pass underneath
the back restraining member 22. The first and second arcuate stop
members 94 and 96 each preferably include a pair of feet 104, 106
which rest on the desk top 14.
Once the first and second securing members 20, 90 are secured to
the desk top 14 over the closed lap top computer 12, the first and
second legs 36, 40 restrain sideways movement of the computer 12,
and the first and second stop members 94, 96 restrain forward and
backward movement. Upward movement is restrained by the
intermediate bar 92, and the back and front restraining members 22,
28 and 30.
The sizing of the first and second securing members 20 and 90 is
preferably such that the anti-theft device 10 can be used with
different lap top computers falling within a predetermined range of
conventional sizes.
With reference to FIG. 8, a further possible embodiment of an
anti-theft device, indicated generally by reference numeral 110, is
illustrated. The antitheft device 110, which is suitable for
securing a lap top computer in the open position only, is identical
in construction and operation to the anti-theft device 10 described
above, and similar reference numerals have been used to denote
similar parts. The device 110 differs from the device 10 only in
that the device 110 includes a single leg 36 for insertion through
the desk top 14 and does not include a second securing member
90.
FIGS. 9 and 10 illustrate an anti-theft device 210 according to a
third preferred embodiment of the invention. This embodiment 210 is
to be preferred in situations where access to a locking assembly
234 above the desk top 14 is desired. Similar to the anti-theft
device 110 described above, the anti-theft device 210 is for
securing a lap top computer 12 in the open position and includes a
rigid securing member 220 made of hardened tubular steel provided
with a vinyl coating. The securing member 220 has an elongate back
restraining member 222 and a pair of U-shaped side restraining
members 224, 226 extending from respective opposite ends of the
back restraining member 222. The securing member 220 also has a
pair of front restraining members 228, 230 extending inwardly from
the front ends of the respective side restraining members 224, 226
in generally parallel relationship to the back restraining member
222. The securing member 220 is dimensioned to define an elongate
opening 232 which can slideably receive the monitor portion 16 of
the lap top 12 therethrough.
The device 210 also includes a locking assembly 234 having first
and second parts. The second part is in the form of a leg 236 made
of a hardened tubular steel rod rigidly attached to and extending
upwardly from an anchor member in the form of a circular base plate
239 provided with a plurality of holes 241 for use in securing the
base plate and hence leg 236 to the desk top 14 using bolts,
washers and nuts 243, 245, 247. The first part is in the form of a
locking device 238 rigidly attached to the side restraining member
224. The locking device 238 is similar in construction and
operation to the locking device 38 and will thus not be described
further except to point out that the locking device 238 is
configured to receive the leg 236 from below rather than from
above, as in the case of the locking device 38. Suitable
modifications to the locking device 238 to ensure its operation in
this manner will become apparent to the person skilled in the art.
Thus, the locking device 238 is telescopically engageable with and
securable to the leg 236 at a selected one of a plurality of
locations along the length of the leg 236 in a similar manner as
described above with respect to the first and second preferred
embodiments.
The anti-theft device 210 can be used in one of two ways. Referring
to FIG. 9, the first way is to bolt the base plate 239 to the upper
surface 42 of the desk top 14 with the leg 236 extending upwardly
in a normal direction from the base plate 239. The lap top 12 can
then be positioned adjacent to the leg 236 in the open position and
the securing member 220 slid down over the monitor portion 16 with
the monitor portion 16 received within the elongate opening 232. At
the same time, the locking device 238 is telescoped downwardly and
locked to the leg 236 to clamp the keyboard portion 18 to the desk
top 14. When so clamped, the monitor portion 16 is confined within
the elongate opening 232. Thus, forward and upward motion of the
lap top 12 are restricted by the front restraining members 238,
230. The back restraining member 222 restrains rearward motion.
Sideways motion is similarly restricted by the side restraining
members 224, 226. Removal of the lap top 12 is thus prevented.
Referring to FIG. 10, the anti-theft device 210 may be used in a
second way to secure the lap top 12 to a desk top 14 having a
predetermined hole 44 extending between upper and lower surfaces
thereof. The leg 236 may be inserted through the hole 44 from below
the desk top 14 so as to extend partly above the desk top 14, and
held in position using bolts 249 which affix the circular base
plate 239 to a lower surface of the desk top 14. The locking device
238 may then be telescoped onto and locked to the leg 236 from
above the desk top 14, thereby clamping the keyboard portion 18 and
desk top 14 between the securing member 220 and the base plate 239.
As in the case of the first and second preferred embodiments, a
hollow tubular plastic plug 250 is seated in the hole 44 to
facilitate insertion and removal of the leg 236 as well as to
reinforce the hole 44 against damage. In this case, however, the
plug 250 has a widened annular flange 252 apertured to permit the
flange 252 to be secured to the upper surface 42 of the desk top 14
using screws 254.
It will be appreciated that the front restraining members 28, 30 or
228, 230 in the illustrated embodiments could be replaced with a
single piece extending between the two side restraining members 24,
26 or 224, 226. However, the use of two separate front restraining
members offers a benefit in that it minimizes visual interference
with the monitor portion 16. It will also be appreciated that the
anti-theft devices 10, 110 and 210 need not include front
restraining members at all if they are only used to secure the lap
top computer in the closed position.
It will be appreciated that a different locking means could be used
to secure the first leg 36, 236 other than that described above.
For example, a series of spaced holes could be provided along the
length of first leg 36, 236 and used in conjunction with a padlock
to secure the lap top computer to the desktop.
As will be apparent to those skilled in the art in the light of the
foregoing disclosure, many alterations and modifications are
possible in the practice of this invention without departing from
the spirit or scope thereof. The foregoing description is of the
preferred embodiments and is by way of example only, and is not to
limit the scope of the invention.
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