U.S. patent number 3,895,768 [Application Number 05/440,822] was granted by the patent office on 1975-07-22 for security clamp.
Invention is credited to Harold G. Scheck.
United States Patent |
3,895,768 |
Scheck |
July 22, 1975 |
Security clamp
Abstract
A security clamp for electronic calculators or other such
devices which is provided with a base having securement means for
securing the base to an underlying support surface, an upper
retention arm pivotally mounted on said base adapted to overlap and
retain one end of the electronic calculator positioned on the base,
lock receiving means associated with the security clamp adjacent
one end thereof, lock means associated with the security clamp and
positioned in cooperative relationship with the lock receiving
means to permit the locking engagement of the lock means with the
lock receiving means and lockingly engage the retention arm in
retention position with respect to a device positioned thereon, and
a lower retention bridge carried on the base adjacent the opposed
end, the lower retention bridge being adapted to arrest the opposed
end of the device positioned on the base such that an electronic
calculator or other such device may be arrested and lockingly
engaged between the lower retention bridge and the upper retention
arm.
Inventors: |
Scheck; Harold G. (Oak Park,
IL) |
Family
ID: |
23750318 |
Appl.
No.: |
05/440,822 |
Filed: |
February 8, 1974 |
Current U.S.
Class: |
248/553; 248/310;
248/676; 400/691 |
Current CPC
Class: |
E05B
73/0082 (20130101) |
Current International
Class: |
E05B
73/00 (20060101); F16m 013/00 () |
Field of
Search: |
;248/19,25,154,203,310,346,361B,361R ;179/146R,147 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Schultz; William H.
Attorney, Agent or Firm: Dominik, Knechtel, Godula &
Demeur
Claims
What is claimed is:
1. A security clamp for lockingly engaging and retaining an
electronic calculator and other such devices having an overall
substantially rectilinear configuration, comprising in
combination,
a base having securement means for securing said base to an
underlying support surface,
lock receiving means associated with said security clamp adjacent
one end thereof,
an upper retention arm pivotally mounted on said base for
overlapping and retaining one end of the device positioned on said
base,
lock means associated with said security clamp and positioned in
cooperative relationship with said lock receiving means, thereby to
permit locking engagement of said lock means with said lock
receiving means and lockingly engage said arm in retention position
with respect to the device positioned thereon,
a lower retention bridge carried on said base adjacent the opposed
end thereof,
said base including arrest means positioned adjacent the end
thereof opposed to the positioning of said upper retention arm and
including a plurality of arrest positions,
said lower retention bridge including engagement means positioned
for corporative co-action with said arrest means thereby to permit
variable adjustment of said lower retention bridge along said base
by positioning said engagement means in engaged relation with
respect to one of said arrest positions of said arrest means and
permit varying the distance between said lower retention bridge and
said upper retention arm,
whereby said base may be fixedly secured to an underlying support
surface by way of said securement means, and said lower retention
bridge may then be adjustably varied to accommodate the length of
the device to be positioned therein, and said upper retention arm
pivotally moved to an open position, permitting the positioning of
an electronic calculator, or other such device on said base, such
that one end of the device is arrested by said lower retention
bridge and thereafter said retention arm is lowered into the
retention position about the opposed end of the device, and the
lock means then activated to coact with said lock receiving means
and lockingly engage said retention arm in the closed position to
securely lock the device in position within said security
clamp.
2. The security clamp as set forth in claim 1 above, wherein said
base includes a pair of opposed slots adjacent the lower portion
thereof, said slots being in parallel and opposed orientation along
the length of said base,
each of said slots being provided with a rail having a plurality of
linearly arranged teeth extending downwardly for a short distance
therefrom,
and said lower retention bridge being provided with a pair of
opposed lock bars, each of said lock bars extending downwardly and
inwardly through said opposed pair of slots, and each of said lock
bars having an end flange extending upwardly therefrom,
whereby said upstanding flanges on said lock bars cooperate with
said pair of opposed rails having depending teeth to permit the
variable adjustment of said lower retention bridge with respect to
said base.
3. The security clamp as set forth in claim 2 above, wherein said
lower retention bridge is further provided with a cross bar
extending between said opposed pair of bridge legs and positioned
to ride below the upper surface of said base, thereby to prevent
the lower retention bridge from being separable from said security
clamp while at the same time providing a riding rail for said lower
retention bridge to permit ease of variable adjustment along the
length of said base.
4. The security clamp as set forth in claim 1 above, wherein said
base is further provided with a pair of opposed slots adjacent the
upper portion thereof and adjacent to the pivotal mounting of said
upper retention arm,
and said upper retention arm is provided with a pair of opposed
lock slots along the lower edges thereof which coact with and are
insertable through said opposed slots provided in said base,
and said base is provided with a lock assembly including a lock
bar, whereby said upper retention arm, when pivoted into closed
position inserts said lock slots into said slots provided in said
base and said lock assembly may be mechanically actuated to slide
said lock bar into locking engagement with said lock slots, thereby
to lockingly engage said upper retention arm into the enclosed and
locked position.
5. The security clamp as set forth in claim 1 above, wherein said
lock receiving means comprises an archway and said lock means
comprises a manually operated lock assembly including a lock bolt
which is disengagably slidable through said archway to lockingly
engage said elements.
Description
BACKGROUND OF THE INVENTION
The progress of electronic technology has permitted the development
and extensive use of devices such as electronic calculators and
other such devices which are generally of a pocket size rectilinear
configuration. The proliferation of such devices has permitted the
extensive use of these devices in industry, office environments,
schools, and the like.
One of the problems which has now surfaced in connection with such
devices is the extensive losses and thefts of such devices from
offices, industrial areas, and schools which employ such devices
for the benefit of employees and/or students. In many applications,
an institution such as an industrial concern office concern, or
school, purchases a number of such electronic calculators for the
use of its employees and/or students, the obvious intention being
that such devices remain on the premises for the use of those
utilizing such devices. However, it has been found that losses have
occurred through negligence as well as from actual theft from the
premises. In order to obviate these problems, it has been necessary
that the institution employ security personnel who distribute such
devices at the commencement of the business day and collect these
at the end of the business day in order to account for such devices
and to prevent the loss through either negligence or theft. In
other applications, some institutions have provided these
electronic calculators with bolted chain assemblies for chaining
the devices to a wall or underlying support surface such that they
can only be moved for the distance of the chain and cannot be
physically removed from the premises.
Insofar as the collection sustem has been employed, it has been
found very expensive and time consuming to employ personnel to
distribute and collect these devices at the beginning and end of
each business day. With regard to the provision of a bolted chain
assembly, it has been found that this assembly does not actually
discourage theft as the chain can be easily snapped or broken.
Hence, the inability to provide a simple security clamp for
retaining and lockingly engaging electronic calculators in place in
the area where such devices are utilized has had a stifling
influence on the further proliferation of these devices.
OBJECTS AND ADVANTAGES
It is therefore the principal object of this invention to provide a
security clamp which is both convenient as well as tamper-proof,
thereby to permit the positioning of electronic calculators in the
area where these devices are to be used while at the same time
obviating the problem of loss through either negligence or
theft.
A further object of the invention is to provide a simplified
security clamp which includes a base which is, in turn, provided
with securement means for securing the base to an underlying
support surface. The base further having an upper retention arm
pivotally mounted thereon for opening and closing the device,
thereby to permit the insertion and removal of an electronic
calculator on the base, lock receiving means and lock means
associated with the base for permitting the locking engagement of
the upper retention arm in locked posture when a device has been
positioned thereon, and a lower retention bridge carried on the
bas, adjacent the opposed end thereof, such that an electronic
calculator positioned on the base may be held in locked position
between the lower retention bridge and the upper retention arm
whereafter the upper retention arm may then be locked in position
such that the electronic calculator cannot be removed therefrom,
without the activation of the lock assembly.
In connection with the foregoing object, it is another object of
this invention to provide a security clamp of the type described
wherein the lock receiving means and the lock means are carried on
the base and upper retention arm respectively such that the upper
retention arm may be lockingly engaged with respect to the base
once an electronic calculator has been positioned thereon.
Still in connection with the foregoing objects, it is yet another
object of the invention to provide a security clamp of the type
described wherein the lower retention bridge is provided with a
rear wall, opposed side walls and a top wall, such that the lower
retention bridge presents a substantially closed assembly with only
the front portion being open such that lower portion of an
electronic calculator may be inserted within the bridge and
thereafter permitting the pivotal closing of the upper retention
arm over the upper portion of the electronic calculator after which
the lock means may be actuated to lockingly engage the upper
retention arm in the closed posture, thereby lockingly engaging the
electronic calculator as between the lower retention bridge and the
upper retention arm.
Still a further object in connection with the foregoing objects is
to provide a security clamp of the type described wherein the base
presents a level lower surface for seatment on an underlying
support surface while the upper surface of the base is inclined
from the upper portion of the security clamp to the lower portion
thereof, whereby an electronic calculator positioned and lockingly
engaged within the security clamp is angularly inclined toward the
view of the user thereof to permit ease of operation.
It is yet a further object of this invention to provide a security
clamp including a base and a lockingly engagable upper retention
arm, wherein the lower retention bridge may be variably adjustable
along the length of the portion of the base to accommodate the
locking positioning of a wide variety of electronic calculators
which may vary in length.
In connection with the foregoing object, it is another object of
the invention to provide a security clamp of the type described
wherein the base is provided with a pair of opposed slots, each of
the slots provided with a rail having a plurality of linearly
spaced teeth thereon, and the lower retention bridge is provided
with a pair of lock bars for insertion through the slots in the
base, each lock bar having an upstanding flange for coaction with
the linearly spaced teeth such that the lower retention bridge, in
order to be adjusted, must be pivoted downwardly toward the base to
engage or disengage the upstanding flanges from the linearly spaced
teeth such that the adjustment means is simplified while at the
same time preventing unauthorized removal of either the lower
retention bridge or an electronic calculator once positioned
thereon.
Further features of the invention pertain to particular
arrangements of the elements and parts whereby the above-outlined
and additional operating features thereof are attained.
The invention, both as to its organization and method of operation,
together with further objects and advantages thereof will best be
understood by reference to the following specification, taken in
connection with the accompanying drawings in which:
FIG. 1 is a perspective view showing one embodiment of the security
clamp of the present invention, including an angularly inclined
base, pivotally mounted upper retention arm, and lower retention
bridge;
FIG. 2 is a top view of the security clamp of the present invention
showing the relative positioning of the lower retention bridge and
upper retention arm and securement means for securing the base to
an underlying support surface;
FIG. 3 is a side elevational view, partly in cross-section, showing
the arrangement of the base, upper retention arm and lower
retention bridge and the securement means of the security clamp
when in position on an underlying support surface;
FIG. 4 is a top view of still another embodiment of the security
clamp as contemplated by the present invention, wherein the lower
retention bridge is shown to be variably adjustable along the
length of the base;
FIG. 5 is a side elevational view showing the manner in which the
lower retention bridge may be variably adjustable along the length
of the base, and the manner in which the upper retention arm is
pivotally secured to the base;
FIG. 6 is a top cross-sectional view showing the details of the
adjustment means provided in the base for the lower retention
bridge and the lock assembly provided for lockingly engaging the
upper retention arm in position; and
FIG. 7 is a side elevational and cross-sectional view showing the
structure of the lower retention bridge and the base for
accomplishing the variable adjustment of the lower retention bridge
with respect to the base.
SUMMARY OF INVENTION
Briefly described, the present invention provides a security clamp
especially designed for the wide variety of electronic calculators
presently available which includes a base provided with apertures
to accommodate the insertion of threaded screws therethrough for
threadedly screwing the base to an underlying surface such as a
desk top, an upper retention arm pivotally mounted on the base and
provided with a lock assembly, the base having an archway to
accommodate the slidable insertion therethrough of a lock bolt
formed as part of the lock assembly associated with the upper
retention arm, such that the upper retention arm may be lockingly
engaged once in the closed position with respect to the base, and a
lower retention bridge which functions to surround and arrest the
lower portion of an electronic calculator inserted therein, such
that once the electronic calculator is positioned on the base, with
the lower end surrounded and arrested by the lower retention
bridge, the upper retention arm may then be pivotally moved into
the closed position and locked by slidably inserting the lock bolt
through the archway such as by mechanical means, thereby
positioning and arresting the electronic calculator in position as
between the upper retention arm and lower retention bridge.
DETAILED DESCRIPTION OF INVENTION
As shown in FIG. 1 of the drawings, the security clamp generally
referred to by the numeral 10, is shown to be formed by a base 12,
having a lower level surface 14, and an upper inclined surface 16.
The base is also provided with a plurality of apertures 18, four of
which are shown to be included in the embodiments of FIGS. 1
through 3 of the drawings. The apertures 18 accommodate the
insertion of threaded screws 20 therethrough for securely mounting
the base 12 to an underlying support surface.
The upper portion of the base 12 is provided with an upper
retention arm 22 pivotally mounted to the base 12. As shown in
FIGS. 1 and 3 of the drawings, the base 12 is provided with a pair
of hinge collars 26 upstanding from the upper portion therefrom and
spaced apart for a distance to accommodate therebetween the arm
collar 28. The hinge collars 26 and arm collar 28 are held in
horizontal alignment and in pivotal relationship by means of a
pivotal pin 29.
The upper retention arm 22 is shown to be formed of opposed side
walls 31, a rear wall 32, and a top wall 33. The front portion of
the upper retention arm 22 is open in order to permit the insertion
of an electronic calculator therein. It will also be noted that
extending rearwardly from the rear wall 32 is a lock housing 34
having a lock assembly 36 mounted thereon, which in the embodiment
as depicted is key operated. The lock housing 34 is completely
enclosed by means of a top wall 37, opposed side walls 38 and a
bottom wall 39. As shown in FIGS. 1 through 3 of the drawings, the
upper retention arm 22 and lock housing 34 are all formed as an
integral assembly such that in this embodiment, the lock assembly
36 is carried by the upper retention arm 22.
Insofar as the lock assembly is concerned, it will be noted that
the base is further provided with an archway 40, while the lock
assembly 36 is provided with a lock bolt 42. Manipulation of the
key 35 will cause the lock bolt 42 to be slid within the archway 40
as depicted by the dotted lines in FIG. 2, such that the upper
retention arm 22 may be locked to the base 12 when the arm 22 is in
the closed position.
The lower portion of the base 12 is provided with a lower retention
bridge 44, mounted on the base 12 adjacent the lower end thereof.
The lower retention bridge 44 is formed by a pair of opposing side
walls 46, a rear wall 48 and a top wall 49. Hence, the lower
retraction bridge 44 is shown to be completely enclosed with the
exception of the front portion such that the lower end of an
electronic calculator positioned therein may be slid into the
interior of the bridge 48 and completely surrounded by the opposed
side walls 46, rear wall 48 and top wall 49 thereof.
As shown in FIG. 3 of the drawings, an electronic calculator may be
easily positioned within the security clamp 10 and this is
accomplished by first pivoting the upper retention arm 22 into an
open position in order to permit the positioning of an electronic
calculator therein. The electronic calculator is positioned on the
base 12, by sliding the lower end of the calculator into the open
portion of the lower retention bridge 48 and then laid to rest on
the upper inclined surface 16 of the base 12. The upper retention
arm 22 is then pivotally moved downwardly until the upper portion
of the calculator is surrounded by the opposed side walls 31, rear
wall 32 and top wall 33 of the upper retention arm 22. Since the
lower portion of the upper retention arm 22 is also completely
open, the arm 22 may easily be pivoted down over the electronic
calculator thereafter to assume the closed position as shown in
FIGS. 1 and 3 of the drawings. Once the arm 22 is properly lowered
in position, the operator need only actuate the lock assembly 26 by
turning the key 35 thereby to slide the lock bolt 42 through the
archway 40. Hence the archway 40 is fixedly secured to the base 12
and the slide bolt 42 is formed as part of the lock assembly 36
which, in turn, is carried by the upper retention arm 22, the
locking engagement of the slide bolt 32 through the archway 40
causes the locking of arm 22 with respect to the base 12.
Since the security clamp 10 is secured to an underlying support
surface by means of the threaded screws 20 inserted through the
apertures 18 provided in the base 12, the electronic calculator
contained therein is securely held to the support surface by the
security clamp 10.
The above-described coaction of the elements is further facilitated
with respect to the embodiment shown in FIGS. 1 through 3 of the
drawings by the configuration of the inclined surface 16 of the
base 12. For example, it will be noted that the upper inclined
surface 16 of the base 12 turns to level at a point 50, the point
of level 50 being at the point at which the rear wall 32 of the
upper arm 22 meets the upper surface 16 of the base 12. The
provision of this angle in the upper inclined surface 16 of the
base 12 prevents the interior surface of the rear wall 32 of arm 22
from striking the calculator when the arm 22 is pivoted into and
out of the retention position as shown in FIG. 3 of the
drawings.
The preferred embodiment of the invention is shown in FIGS. 4
through 7 of the drawings. There is shown a security clamp 60
formed by a base 62, having a lower level surface 64 and an upper
inclined surface 66. The base 62 is once again provided with
apertures 68 to accommodate the insertion therethrough of threaded
screws (not shown) in order to permit securement of the clamp 60 to
an underlying support surface.
The upper retention arm 70 is shown to be hinged to the base 12 by
means of base hinge collars 71 and arm hinge collars 72. As shown
in FIG. 4 of the drawings, the base hinge collars 71 and arm hinge
collars 72 interfit and are held in pivotal relationship by means
of a pivotal pin 73. Once again, the upper retention arm 70 is
formed by a pair of opposed side walls 74, a rear wall 75 and a top
wall 76, leaving the front and lower portions of the retention arm
70 open. The pivotal relationship of the arm 70 with respect to the
base 62 is shown in FIG. 5 of the drawings by the phantom lines
indicating the position of the upper retention arm 70 when in the
open position. It is apparent from a view of FIGS. 4 and 5 of the
drawings, that the upper retention arm 70 operates in the same
manner as the equivalent upper retention arm 22 as shown and
described in connection with FIGS. 1 through 3 of the drawings.
It will further be noted that the upper portion of the base 62 is
provided with a pair of opposed parallel slots 78, positioned
adjacent the side edges thereof. The upper retention arm 70 is
provided with a pair of opposed lock slots 79, the lock slots 79
being insertable within the slots 78 as the upper retention arm 70
is pivoted into the closed position. The base 62 is further
provided with a lock assembly 81 (FIG. 6), the lock assembly 81
including a pair of lock bars 82. As is illustrated in FIG. 6 of
the drawings, the lock assembly 81 and lock bars 82 associated
therewith are formed as part of the base 62 while the lock slots 79
are formed as part of the upper retention arm 70. Hence, once the
lock slots 79 are inserted through the slots 78 in the base 62, as
the arm 70 is pivoted into the closed position, the arm 70 may be
locked in the closed position by manually manipulating the lock
bars 82 causing the bars 82 to slide through the lock slots 79. The
aforementioned actuation may easily be accomplished by utilizing a
key (not shown) inserted through an appropriate key slot provided
in the lock assembly 81.
The lower portion of the base 62 is shown to be provided with a
lower retention bridge 84 formed by opposed side walls 85, a rear
wall 86, and a top wall 87. In addition, it will be noted that the
base 62 is provided with a pair of opposed parallel bridge slots
88, positioned adjacent the side edges of the base 62 and along the
lower portion thereof. As shown in FIG. 5 of the drawings, the
lower retention bridge 84 is movably adjustable along the length of
the base 62, the bridge 84 being provided with appropriate
structures, as will be more fully defined hereinafter, for
permitting movement of the bridge 84, along the bridge slots
88.
The details of construction of the lower retention bridge 84 and
the bridge slots 88 is more fully shown in FIGS. 6 and 7 of the
drawings. It will be noted that interiorly of each of the bridge
slots 88 is mounted a rail 90, provided with a plurality of
linearly spaced teeth 92. The teeth 92 extend downwardly for a
short distance and are fixedly secured to the undersurface of the
base 62 such that the same can be contacted through the bridge
slots 88. As is more fully shown in FIG. 7 of the drawings, the
lower retention bridge 84 includes a pair of downwardly and
inwardly depending legs 94, each leg having an upstanding flange
95, mounted at the terminal end thereof. In order to complete the
assembly and to further ensure that the lower retention bridge 84
cannot be removed from the security clamp 60, the opposed bridge
legs 94 are interconnected by a cross bar 96, depicted by a dotted
line in FIG. 6.
It will be apparent from FIG. 7 of the drawings that the only
manner in which the lower retention bridge 84 can be moved is by
tilting the same forwardly and downwardly as illustrated by the
dotted lines in FIG. 7 such that the end terminal upstanding flange
95 moves out of engagement with the corresponding teeth 92 of the
rail 90. It will further be apparent that the only way in which the
lower retention bridge 84 can be moved forwardly and downwardly is
when no electronic calculator is positioned therein. Hence, in
order to adjust the positioning of the lower retention bridge 84,
this adjustment can only be accomplished when the security clamp 60
is free of any electronic calculator positioned therein. The cross
bar 96 provides a means to ensure that the lower retention 84
cannot be removed from the base 62, since the crossbar 96 rides
under the upper inclined surface 66 of the base 62. Furthermore,
the crossbar 96 also provides a convenient riding rail for the
lower retention bridge 84 as the same is variously adjusted along
the bridge slots 88.
It now becomes apparent that in order to mount an electronic
calculator within the embodiment of the security clamp 60 in FIGS.
4 through 7 of the drawings, one first adjusts the lower retention
bridge 84 to the desired position by tilting the same forwardly and
downwardly such that the bridge legs 94 disengage from the teeth
92, permitting the sliding movement of the bridge 84 along the
slots 88. Once the appropriate length is determined, the retention
bridge 84 may then be tilted upwardly until the terminal upstanding
flange 95 engages a corresponding tooth 94, adjusting the distance
between the lower retention bridge and the upper retention arm 70.
The arm 70 is the moved into the open position as depicted in FIG.
5 of the drawings (dotted lines) and the calculator may then be
inserted into the clamp by positioning the lower end of the
calculator into the lower retention bridge 84. The upper retention
arm is then pivotally moved into the closed position as shown in
FIGS. 4 and 5 of the drawings, until the lock slots 79 move into
the slots 78. Once in the position, the operator need only actuate
the lock assembly 81 by a key or other suitable means, until the
lock bars 82 are moved into locking engagement through the lock
slots 79 of the arm 70. Since the base 62 is fixedly secured to the
underlying support surface such as a desk or the like, it will be
apparent that the electronic calculator is securely held in
position and cannott be removed unless and until the operator once
again actuates the lock assembly 81 to open the retention arm 70
and permit removal of the calculator.
While a variety of materials may suffice for forming the subject
security clamp, it is obviously preferable to form such a device
from tempered steel or other hard material. Generally, any type of
plastic can be cut or burned, and hence, unauthorized removal is
more readily accomplished when the clamp is formed of such
materials. However, it is to be understood that the particular
materials, utilized for the formation of the subject security clamp
are not particularly relevant to the concept of the present
invention, but rather, the selection of materials is deemed to be
arbitrary with the manufacturer thereof.
Insofar as the lock assembly is concerned, it will also be
appreciated that any form of lock assembly may be utilized
including a key actuated type lock, as well as a combination type
lock. The principal requirement of the lock assembly in connection
with the present invention is to ensure that the upper retention
arm is fixedly secured to the base when in the closed position ad
for this reason it is irrelevant as to whether the lock assembly is
included as part of the arm or as part of the base. It is apparent
from the differences between the embodiments shown in FIGS. 1
through 3 of the drawings, and those shown in FIGS. 4 through 7 of
the drawings, that the security clamp 10 shown in FIG. 1 has the
lock assembly 36 formed as a part of the upper retention arm, 22,
while the archway 40 is formed as part of the base 12, while on the
other hand the embodiment shown in FIGS. 4 through 7 of the
drawings includes the lock assembly 81 as part of the base 62,
while the lock slots 79 are formed as part of the upper retention
arm 70.
It will further be appreciated that there are various possible
modifications in order to achieve a movable lower retention bridge
84 of the type shown in FIGS. 4 through 7 of the drawings. The
particular structure shown in FIGS. 6 and 7 of the drawings is
selected only for the purpose of illustrating the economically
efficient manner of accomplishing the concept of movability or
adjustability of the lower retention bridge 84 with respect to the
base 62. Obviously, any means chosen to accomplish this adjustable
feature must be done on the basis of ultimate cost in terms of
manufacturing economy. It is clearly intended to cover within the
appended claims all such modifications of the means for achieving
adjustability of the lower retention bridge 84. It will now be
apparent that the present invention provides a novel security clamp
especially useful for securing electronic calculators in place,
especialy designed for use in industrial, commercial and school
environments. The security clamp as described herein further
permits the usage of such a device regardless of the size of a
particular electronic calculator to be utilized, since the present
invention introduces features of adjustability in connection with
the sizing of the calculator. Furthermore, insertion and removal of
the calculator is rendered efficient since the device operates with
some form of lock assembly such as a key operated tumbler assembly,
and hence, the electronic calculator, once lockingly engaged in the
security claim, may easily be removed. On the other hand, it is
apparent that once the elctronic calculator has been fixedly locked
in the security clamp, and the security clamp fixedly secured to an
underlying support surface, the clamp cannot be removed short of
complete destruction of not only the claim, but also the electronic
calculator, since the threaded screws for holding the security
clamp in place are hidden from view when the calculator is in
position.
It will be apparent that from the foregoing description all of the
objects and advantages as previously set forth have been provided
by virture of the present invention. While there has been described
what at present is considered to be the preferred embodiments of
the invention, it will be understood that various modifications may
be made therein, and it is intended to cover in the appended claims
all such modifications as fall within the true spirit and scope of
the invention.
* * * * *