You are an expert at summarizing long articles. Proceed to summarize the following text:

You are an expert at summarizing long articles. Proceed to summarize the following text: 
RELATED APPLICATIONS 
       [0001]    This application is a continuation-in-part (“CIP”) of U.S. application Ser. No. 13/031,174, filed Feb. 18, 2911, which application is a continuation-in-part (“CIP”) of U.S. application Ser. No. 12/657,670, filed Jan. 25, 2010, which &#39;670 application is a continuation-in-part (CIP) application of U.S. application Ser. No. 12/154,561, filed May 23, 2008 (&#39;561 application), which &#39;561 application is a CIP application of U.S. application Ser. No. 11/454,433, filed Jun. 16, 2006 (&#39;433 application), which &#39;433 application is a CIP application of U.S. application Ser. No. 11/359,871, filed Feb. 22, 2006 (&#39;871 application), which &#39;871 application is a CIP application that claims priority from a) U.S. Provisional Appln. No. 60/655,270, filed Feb. 22, 2005, b) Provisional Appln. No. 60/678,911, filed May 6, 2005 and c) U.S. application Ser. No. 11/038,591, filed Jan. 19, 2005 (&#39;591 application), which &#39;591 application claims priority from i) U.S. Appln. No. 60/569,561, filed May 10, 2004 and ii) Provisional Appln. No. 60/626,839, filed Nov. 10, 2004. The &#39;433 application further claims priority from A) Provisional Appln. No. 60/691,476 filed Jun. 17, 2005, B) Provisional Appln. No. 60/725,333 filed Oct. 11, 2005, C) Provisional Appln. No. 60/757,737, filed Jan. 10, 2006, and D) Provisional Appln. No. 60/783,188, filed Mar. 16, 2006. These applications are incorporated by reference herein. 
     
    
     FIELD OF THE INVENTION 
       [0002]    The present invention relates to security slot attachments to provide for the security of portable electronic devices, such as computers, laptops, notebooks and the like. The present invention also relates to a locking assembly for tablet computers (i.e. iPad®), smart phones, electronic books known as “e-readers”, and other hand-held personal digital devices, as well as to plunger security locks, and to laptop computers, notebook computers and other hand-held electronic devices such as cell phones, personal digital assistants, personal music and/or video players (i.e. iPod®), etc., without limitation, which are configured for operational use with a locking assembly associated with such a plunger security lock. 
       BACKGROUND OF THE INVENTION 
       [0003]    Portable devices such as computers or other similar equipment are often supplied with a small security slot in their housing to provide an attachment for a security cable anchored to an immovable object. It is advantageous for the attachment device in the slot to be easily removable when the security cable is no longer required. The slot is approximately 3 mm by 7 mm. 
         [0004]    U.S. Pat. No. 6,317,936 of McDaid et al. describes a security anchor comprised of an internal member, an external member and a screw to lock the external member to the exterior of the equipment housing by engaging the internal member within the security slot. The internal member has an bent over end that fits inside the security slot with the screw loosened and then locks to one long edge of the security slot at the inside of the equipment housing when the screw is tightened. A screw driver is required to engage and disengage the security anchor. 
         [0005]    U.S. Pat. No. 6,513,350 of Hurd et al. describes two different devices to provide attachment to the security slot. They both involve the insertion of a locking member slightly smaller than the slot dimensions shaped as a rectangle with rounded ends on the small dimension being aligned with the security slot, inserted, and then turned 90 degrees whereby its length would prevent its exit until rotated again into alignment. In the first embodiment, a partitioned cylinder with a locking member extending from the bottom on one half on a rod is first inserted into the security slot and rotated 90 degrees. The mating half of the cylinder with a protruding bar on the bottom is then mated with the first half with the bar end also entering the security slot. The geometry is such that in this configuration with two cylinder halves together, the cylinder cannot be rotated and is prevented from exiting the security hole. A cable threaded through two aligned transverse holes in the two halves will keep the attachment cylinder secured to the outer equipment housing around the security slot. The attachment cylinder which comprises two separate parts can again be removed from the security slot when the security cable is removed. 
         [0006]    The preferred embodiment of the Hurd patent (&#39;350) shows a specialized combination lock with a locking member at the distal end of an extended rod emanating from one end. A retaining member, also further down on the locking member rod senses the outer equipment housing wall after the locking member is rotated 90 degrees, and locking pins are engaged by retraction of the rod by the lock preventing the locking member from rotating back into alignment with the security slot thereby securing the combination lock to the equipment housing. The combination lock is attached to a security cable. Upon entering the proper combination, the rod at the end of the lock is again extended releasing it from the security slot. 
         [0007]    U.S. Pat. No. 7,100,403 of Murray, Jr. Et al. describes a variety of cable-attached locks which engage the long ends of a security slot by distal engagement wings on arms which expand or are locked in a spread-apart configuration after they are compressed together for insertion. In addition, similar engagement of non-lock security slot attachment devices using resilient engagement fingers with side wings using screw or other mechanical locking methods are also illustrated. A lock with a rotating locking member on a rod is also described. After inserting by alignment through the security slot, the locking member is rotated 90 degrees after which two rods extend from the end of the lock into the distal ends of the security slot preventing rotation back into alignment of the locking member. 
         [0008]    The prior art does not show a security slot engagement device that is inexpensive to manufacture, interfaces to a variety of locks or cables, has no separable parts, is easy to use, and requires no tools for installation or removal. 
         [0009]    Additionally, notebook computers, tablet computers or other personal electronic devices are increasingly used by students at educational institutions. They are also used by workers at job sites. Notebook computers are often referred to as laptop computers, meaning a portable, foldable computer which can be used while positioned upon the user&#39;s lap. In some instances, “laptop computer” refers to the term used in the trade for an older version of a larger portable computer. However, with increasing streamlining and downsizing of portable computers, compact, smaller versions are referred to as “notebook computers”, but the terms are generally interchangeable. 
         [0010]    Personal electronic devices, such as tablet computers (i.e. iPad®), cell phones, smart phones, personal digital assistants, personal music and/or video players (i.e. iPod®), etc. without limitation, can be used just about anywhere. Other personal digital assistants, including electronic books, known as “e-readers”, such as the Nook®, can download virtual images of books. 
         [0011]    In order to safeguard the personal electronic device, such as a tablet computer, a notebook computer, smart phone, e-reader or personal music and/or video player, it must be shut down, closed and transported by the user. 
         [0012]    However, it is often advantageous for the user of a tablet computer, notebook computer or other personal electronic device to take a break and leave the device/computer open and operable at a work station, library study carrel, etc., with other papers and books left at their current open position. This leaves the personal electronic device, such as a tablet computer or notebook computer, vulnerable to theft. 
         [0013]    Moreover, in the commercial retail environment, it is advantageous to display consumer electronic devices, such as tablet computers, notebook computers, cell phones or personal digital assistants in a secure but visually accessible display. 
         [0014]    For that matter, various security devices are known for securing personal electronic devices configured for use with the known security devices. 
         [0015]    For example, U.S. Pat. No. 6,755,056 of Igelmund (the &#39;056 patent), discloses a security device (e.g., male lock fitting  100 ) for securing portable equipment having a security slot in the chassis of the equipment, and adaptor for adapting electronic portable equipment without a slot for use with the security device. The security device ( 100 ,  100 ′) is tethered to a piece of heavy furniture or otherwise immovable structure, typically with a braided cable or like means, and includes an attachment with a slot mating head and an axial movable head locking member. This is inserted into the slot in the housing of the electronic equipment (or in the adaptor affixed to the housing where there is no slot) after the slot mating head to prevent rotation and removal of the head from the slot. 
         [0016]    For example, the  FIG. 7  security device ( 100 ′) is inserted into a lock fitting receptacle  106  where pin  104  passes through the head locking aperture  25  into mounting end  22  and into slot opening  12 . When fully inserted, the housing lockably engages the fitting by way of conventional locking mechanisms, such as fixed or retractable teeth  108 ,  108 ′ on the male lock fitting and teeth engaging notches  110  within the receptacle, so the pin is secured in the head locking position. 
         [0017]    One of the shortcomings of the &#39;056 patent, however, is that the security provided is only as strong as either the housing material and therefore slot integrity, or the adhesive adhering the adaptor to the housing. A thin, sheet-metal housing is pliable and a plastic housing is frangible, allowing for easy removal of the attachment with slot mating head and axial moveable head locking member, once in place. 
         [0018]    The aforementioned U.S. Pat. No. 6,513,350 of Hurd (the &#39;350 patent), discloses a physical security system comprising a combination lock for connecting specially designed security slots in portable electronic devices, such as a notebook computer. Like the &#39;056 patent, the security device of &#39;350 patent operates with a portable computer with a wall  10  having an inner surface  20 , which wall is configured with a slot  15 . A lock interface  25  is engageable with wall  10  through slot  15 . A locking mechanism  30  comprising a tethering cable and lock  40  allows that, upon inserting lock interface  25  in slot  15  and engaging the interface with inner surface  20 , the lock interface is then attached to a stationary object with lock  40  and cable  40 . 
         [0019]      FIG. 6  shows an alternative locking system  600 , including a housing  605  and slot engagement member  610  with locking member  615  and retaining member  620 . Engagement member  610  is coupled to the housing  605  so that it moves between an extended and retracted position. Two pins  625  extend from the housing  605  and are located on opposing sides of a shaft of engagement member  610 . The housing  605  includes a combination lock mechanism  630  for interacting with the engagement member  610  and retaining in the retracted position until the correct combination coed is dialed in to the lock mechanism. 
         [0020]    Also like the &#39;056 patent, however, the security provided by the &#39;350 patent is only as strong as the housing material and therefore slot integrity. Moreover, and as is readily apparent in  FIG. 6 , there does not appear to be a means for effecting retraction and extension of pins  625  to/from housing  605 , or means for comfortably grasping the lock mechanism to articulate slot engagement member in the slot  660  in wall  650  ( FIG. 6 ). 
       OBJECTS OF THE INVENTION 
       [0021]    It is therefore an object of the present invention to provide a security slot attachment to provide security for portable or stationary electronic computing devices. 
         [0022]    It is also an object of the present invention to provide a lock attachment for a portable electronic computing device which retrofits into a rectangular slot of the housing of the portable electronic computing device and which prevents theft thereof. 
         [0023]    It is also therefore an object of the present invention to provide a locking assembly security apparatus for a non-foldable tablet computer, e-reader or smart phone preferably associated with a plunger-type security lock or other locking device, and an electronic device configured to be secured in cooperation with the locking assembly and plunger-type security lock, which overcome the shortcomings of the prior art. 
         [0024]    Other objects which become apparent from the following description of the present invention. 
       SUMMARY OF THE INVENTION 
       [0025]    The present invention is a security slot attachment device that is comprised of several major parts secured together by pins which permit movement among the parts to facilitate engagement with the security slot and removal therefrom, without the use of any tools. The parts themselves, typically four in number, can be machined of aluminum or stainless steel, molded from a wide variety of rigid plastic resins, die cast from zinc-aluminum alloys, or molded using a metal injection molding process. 
         [0026]    In general, the lock of the present invention includes an assembly of a slot engaging member insertable in a slot of a piece of equipment being locked, such as a portable or desktop computer, a laptop, notebook or other handheld electronic device, a monitor, a television/video screen, a video game, an electronic instrument such as an oscillator or a medical centrifuge or other analytical device, or the like. The slot engaging member is lockable by a dual action rotation and pivoting of an anchor sub-assembly grasping the slot engaging member; whereby the slot engaging member is unlocked by a reverse dual action pivoting and rotation of the anchor sub-assembly for the slot engaging member; wherein the lock is locked without use of a tool. 
         [0027]    For example, the lock assembly includes the rotatable locking member insertable within a slot in a housing of an electronic equipment. The rotatable locking member engages with the anchor sub-assembly having a rotatable element, where the rotatable element communicates with a pivotable member having a recess through which a further locking member is inserted, wherein said lock is locked without use of a tool. 
         [0028]    In the embodiment with four major parts, there are a locking element, a guide, a pivot block, and a locking plate, arranged in an array in that sequential order. The locking element is a rod with an elongated locking end centrally attached to a distal end of the rod, forming a T-shape rod end, which is insertable and rotatable within a rectangular slot in the housings of portable or stationary computing devices. The guide is a generally flat substrate block having the same crossection as the elongated locking end at its front portion. The guide also has a central hole, and a top portion with extended wings. The pivot block is preferably a short rectangular shaped cylinder, preferably round shouldered, with a large hole to accept the free end of the locking rod therein, opposite to the T-shaped slot engaging end of the locking element, and small holes, such as two small holes, to accept fasteners, such as pins. The locking plate is preferably a thick rectangular plate with a large hole, such as, for example, a rectangular hole, in its center and a pair of two transverse holes in positional register for a pivoting pin or axle insertable therein, to permit pivoting of the pivot block within the large hole of the locking plate. 
         [0029]    The assembly of the four parts is as follows. The guide part is engaged onto the rod of the locking element; and the central hole of the guide is sized to allow it to rotate freely. The free end of rod is then inserted into the snug large hole of the pivot block and the transverse hole near the end of the rod (now capturing the guide) is aligned with the small hole through the side of the pivot block at the large hole site. The rod and the pivot block are then rigidly attached by a small short force-fit pin. This anchor subassembly of three major parts is now attached to the locking plate by inserting the distal end of the pivot block into the large rectangular hole, aligning the transverse clearance hole with the force-fit holes in the locking plate and pushing the longer pin through the locking plate and the pivot block. The distal end of the large rectangular hole (away from the pivot block) is used for security attachments, such as the prong or other protruding element of a lock. 
         [0030]    The size of the locking end of the rod and the distal portion of the guide is just slightly smaller than the dimensions of the rectangular security slot of the housing of the computing device, such as a laptop or other portable or fixed computing device. To attach the security slot attachment of this invention to the security hole, the locking end is aligned with the end of the guide and both are inserted through the security slot with the wings of the guide resting on the outside surface of the device housing. The locking plate is turned 90 degrees in its own plane, and then the locking plate is pivoted up 90 degrees so that the side of its pinned end now rests against one long side of the guide that protrudes from the housing. In that position, the locking plate and the attached locking end within the housing cannot be rotated and therefore are locked to the housing. Anything inserted through the protruding tang formed by the pivoted locking plate that will prevent it from pivoting back will keep the attachment secured to the housing. A cable, a properly sized loop of an ordinary padlock, or a specialty locking prong engaging the tang will suffice. To remove, the attachments are removed from the protruding tang, the locking plate is pivoted 90 degrees, rotated 90 degrees in its own plane, and the attachment is pulled out of the security hole. 
         [0031]    An optional washer of compressive elastomer foam can be slipped onto the insertable portion of the guide for a snug locking feel which would also eliminate the possibility of buzzing or other noise induced by vibration. The elastomeric foam washer lies flattened somewhat between the winged portion of the guide and the equipment housing when attached. 
         [0032]    In a preferred embodiment of the security slot attachment, two parts are modified. The pivot block has three corners rounded for a better operational fit. Also, the guide has one long side of the winged portion (which sits above the housing when attached) made wider. The locking plate can only lock against the other narrow side in the new embodiment. This change enhances security because it denies access to both sides of the security slot (for malicious plying with a tool) when the attachment is installed. 
         [0033]    In another embodiment, the invention comprises a locking bar associated with a plunger-type or other security lock comprising a cradle including at least one diagonally extending chassis bar with respective pockets at opposite ends, wherein one of the pockets is hingeably releasable to insert one corner of the tablet computer, smart phone, e-reader, or other hand held personal digital assistant device therein while the other end is a non-hingable pocket into which the opposite corner of the tablet computer, smart phone, e-reader or other hand held personal digital assistant is inserted therein. The hingeable pocket includes a hingable housing which pivots to allow insertion of one corner of the device to be inserted therein, after the opposite corner has already been inserted in the slot of the fixed, non-hingable pocket at the opposite side of the at least one chassis bar. The chassis bar is preferably adjustable in length, to allow for different sized devices to be locked therewith. Although there is preferably one diagonal chassis bar with opposite corner pockets to receive one of respective diagonally opposed corners of the device, it is contemplated that more than one chassis bar can be utilized, and/or comprise a frame with at least a pair of pockets each pocket supporting a respective corner of the device therein. One end of the chassis bar is configured as an axially extending flange with an aperture hole, which flange is insertable within a corresponding slot in lock having a movable pin or hook of a combination lock and locking mechanism in a housing. 
         [0034]    For example, in a preferred embodiment, the security apparatus of this invention is designed to engage diagonal corners of an electronic tablet (such as an Wad®. The locking assembly apparatus engages with a tablet computer or similar device, which is securely locked to it via a combination pin lock, such as, for example, a plunger lock. A respective distal corner pocket engages one corner of the tablet computer, while a respective proximal lockable corner pocket engages the diagonally opposite corner of the tablet computer. The security apparatus includes a chassis bar, such as a flat metal chassis bar connecting the fixed distal pocket to the diagonally opposite proximal hingable pocket. 
         [0035]    The base of the proximal pocket extends from the attachment portion to the diagonally extending chassis bar to the flanges at the proximal end on the other side of the integral hinge pin housing of the proximal pocket, which flips up to permit a corner of the tablet computer or other device to be inserted or disengaged. The hingable tail section of the flange fits between the forked flange protrusions of the base of the proximal hingable pocket; when it is co-planar with the base and the slot of the pin lock can be fit over the end and locked by its pin engaging the hole within the hingable tail section of the hingable pocket, to complete the locking procedure. 
         [0036]    Although a pre-determined sized security apparatus can be provided for the size most popular tablets or similar devices on the market, an adjustable single unit can also be provided as an alternate embodiment. In one embodiment, the adjustability feature is formed by permitting the metal chassis bar to slide through a slot in a modified distal pocket. An array of holes in the chassis provides the adjustability by virtue of a friction fit removable locking pin The pin cannot be taken out once the tablet computer is engaged, but it is simply lifted up for adjustment to permit the pocket to slide on the bar. 
         [0037]    Another adjustable embodiment uses a two-part telescoping metal chassis bar. This embodiment is more compact for smaller tablets or like items since there is no distal metal bar extending beyond the distal engagement pocket. 
         [0038]    While any kind of plunger type pin lock having a slot and movable pin or hook can be utilized, in another embodiment a connector is provided connecting permanently connecting the locking housing to a tether, a plunger operational in cooperation with locking mechanism and a sliding key operate to lock the tether to a one end of a locking strip, which end extend part way through the electronic device. The other end of the locking strip comprises wedge stop, to prevent the locking strip from passing all the way through the housing, for example, a hinge gap between upper and lower housings. 
         [0039]    The plunger-type security lock preferably operates by grasping the housing, dialing in a correct combination and pushing the plunger through the hole associated with one of the pockets. In another embodiment the plunger is pushed to extend the sliding key from a housing in order to engage a portion of the locking member. Once engaged, and upon release of the pushing force, the sliding key retracts the engaged portion of the locking member at least partially into the housing, and maintains it until the combination locking mechanism is unlocked. 
         [0040]    In another embodiment, the invention comprises an electronic device configured for allowing a locking member to pass partially through, but not completely through some part of the electronic device chassis or housing, a locking member and a plunger-type security lock configured for lockingly engaging some part of the locking member once passed through the chassis or housing part. 
         [0041]    Other objects which become apparent from the following description of the present invention. 
         [0042]    When locked in place, the notebook computer or other personal electronic device is secure from being taken away from the surface to which it is locked. Furthermore, taking advantage of software and/or software/biometric security systems, the computer or other personal electronic device will also be unusable by unauthorized individuals when its owner is away from the area for a break, telephone call, or other short-term pursuits. With a few keystrokes, the owner of the computer or other personal electronic device can resume activity in exactly the same place as when activity had been suspended. This is especially useful for leaving an active computer or other personal electronic device on a study desk or library carrel. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0043]    The present invention can best be understood in connection with the accompanying drawings. It is noted that the invention is not limited to the precise embodiments shown in drawings, in which: 
           [0044]      FIG. 1  is a perspective view of a locking base and locking collar of one of the embodiments for a notebook computer lock of this invention; 
           [0045]      FIG. 2  is a side view of the embodiment of  FIG. 1 , taken along in the direction of arrow “ 2 ” of  FIG. 1 , showing a typical notebook computer locked with a locking base and locking collar to a work surface with a padlock; 
           [0046]      FIG. 2A  is a partial fragmentary view of the locking base as in  FIG. 2 , taken along in the direction of arrow “ 2 A” of  FIG. 2 ; 
           [0047]      FIG. 2B  is a partial perspective view of the typical notebook computer locked in place between the locking base and locking collar of  FIG. 2 ; 
           [0048]      FIG. 2C  is a partial front elevational view of the locking base and locking collar as in  FIG. 2 ; 
           [0049]      FIG. 2D  is a side elevational view of the notebook computer shown used by a person at a work station; 
           [0050]      FIG. 3  is a perspective view of an alternate embodiment showing a typical notebook computer in the locking base with an elongated back side; 
           [0051]      FIG. 3A  is an exploded perspective view of a further embodiment, showing handheld electronic accessories displayed upon respective shelves, added to the front side of the locking base of  FIG. 3 ; 
           [0052]      FIG. 3B  is a close-up of one type of key lock used with the notebook computer lock of the present invention; 
           [0053]      FIG. 4  is a side view of alternate embodiment for a notebook computer lock of  FIG. 3 , showing dual locking flanges; 
           [0054]      FIG. 5  is a perspective view of a transparent locking panel of the alternate embodiment shown in  FIG. 4 ; 
           [0055]      FIG. 6  is a side edge view of the transparent locking panel showing a locking flange, taken along in the direction of arrow “ 6 ” of  FIG. 5 ; 
           [0056]      FIG. 7  is a top plan view of the transparent locking panel showing a padlock hole in the locking flange, taken along in the direction of arrow “ 7 ” of  FIG. 6 ; 
           [0057]      FIG. 8  is an exploded perspective view showing the addition of an optional battery pack housing cage feature to the locking apparatus of the embodiment shown in  FIG. 1 , although it can be used with any of the embodiments herein; 
           [0058]      FIG. 9  is a side view of the locking apparatus of  FIG. 8  used on a notebook computer showing the housing cage feature; 
           [0059]      FIG. 10  is a perspective view of a further alternate swing arm embodiment using a swinging arm, such as a telescoping bar, to secure a typical notebook computer; 
           [0060]      FIG. 11  is a top plan view of a clad steel cable used as a locking element for the further alternate swinging arm embodiment; 
           [0061]      FIG. 12  is a top plan view of a chain inside a flexible tube as an alternate locking element in the embodiment of  FIG. 10 ; 
           [0062]      FIG. 13  is a perspective view of an alternate embodiment of a notebook computer lock using a separate “over the table” locking base and a computer lock using a captive swinging locking bar, which fits across lower portion of the display; 
           [0063]      FIG. 13A  is a front elevation of a clamp detail of the locking base shown in  FIG. 13 , taken along the ellipse  13 A of  FIG. 13 ; 
           [0064]      FIG. 13B  is a clamp bracket side elevational view thereof, showing use of a key lock; 
           [0065]      FIG. 14  is a side edge view of the locking base of  FIG. 13 , shown attached to a work surface; 
           [0066]      FIG. 15  is a top plan view of the computer lock of  FIG. 13 , secured within a locking base, also showing the position of the notebook computer with dashed lines; 
           [0067]      FIG. 16  is a perspective view of one embodiment for a width adjustable notebook computer lock; 
           [0068]      FIG. 17  is a perspective view of a further embodiment for a discrete width adjustable notebook computer lock; 
           [0069]      FIG. 18  is a perspective view of an integrated locking base/computer lock embodiment; 
           [0070]      FIG. 19  is a top plan view of another integrated locking base/computer lock with two pivot links; 
           [0071]      FIG. 20  is a perspective view of a preferred embodiment for a low profile notebook computer, shown attached by fasteners, such as screws, down to the work surface; 
           [0072]      FIG. 21  is a perspective view of the locking base of  FIG. 20  used as a portable device secured to the work surface via a cable and clamp; 
           [0073]      FIG. 22  is a detail side view of the clamp screw subassembly used in  FIG. 21 , shown in the ellipse “ 22 ” of  FIG. 21 ; 
           [0074]      FIG. 23  is an exploded perspective view of the components of an alternate embodiment with a socket wrench type clamp screw subassembly; 
           [0075]      FIG. 24  is a bottom view of the end cap of the embodiment of  FIG. 23 , showing the recess which forms the socket wrench element; 
           [0076]      FIG. 25  is a top view of the clamp screw assembly as in  FIG. 23 , shown with the captive screw; 
           [0077]      FIG. 26  is a side view cross-section of the clamp screw assembly as in  FIG. 23 , taken along line “ 26 - 26 ” of  FIG. 25 , shown with the screw head seated in the socket wrench recess and preventing insertion of the cable; 
           [0078]      FIG. 27  is a side view in cross-section of the clamp screw assembly as in  FIG. 23 , shown with the cable preventing seating of the screw head in the socket wrench recess. 
           [0079]      FIG. 28  is a perspective view showing the possible locations of through-holes for use of an alternate protrusion spike embodiment security feature used with a cable; 
           [0080]      FIG. 28A  is a perspective detail showing the closed front section of a notebook computer wherein a security feature is two through holes which align upon closing display lid permitting a padlock with an elongated hasp to lock the display to the keyboard base. 
           [0081]      FIG. 28B  is a perspective view of a notebook computer with a security hole in the top right corner of the display section. 
           [0082]      FIG. 28C  is a perspective view of the computer of  FIG. 28B  with a pin lock and locking ferrule aligned prior to insertion through security hole. 
           [0083]      FIG. 28D  is a perspective view of the computer of  FIG. 28C  after pin lock is used to secure ferrule thereby using a cable to secure computer to a table top. 
           [0084]      FIG. 29  is a perspective view of the spike with a cable attached ferrule, pin lock, and secure cable clamp used to secure a notebook computer; 
           [0085]      FIG. 30  is a schematic perspective view of a notebook computer with captive security rods for cable attachment; 
           [0086]      FIG. 31  is a schematic perspective view of a notebook computer with a hole downward through the base for use with a long protrusion spike and a transverse locking pin; 
           [0087]      FIG. 32  is a diagrammatic side elevational view of one embodiment for a flexible strip lock for a computer; 
           [0088]      FIG. 33  is a front elevational view thereof, taken in the view direction of arrow “ 33 ” shown in  FIG. 32 ; 
           [0089]      FIG. 34  is a top plan view of the shim strip of the flexible lock; 
           [0090]      FIG. 35  is a side elevational view taken in the view direction of arrow “ 35 ” of  FIG. 34 ; 
           [0091]      FIG. 36  is a perspective view of a lower protective shoe of the flexible lock; 
           [0092]      FIG. 37  is a diagrammatic perspective view illustrating a flexible locking means; 
           [0093]      FIG. 38  is a diagrammatic exploded view of a key locking means with a spring; 
           [0094]      FIG. 39  is a partial view of a key locking means; 
           [0095]      FIG. 40  is a perspective view of a notebook computer showing the hinge gap and the path of weaving the distal end of a locking strip through the hinge gap, as well a slot in the housing of the notebook computer permitting access to a rigid protruding locking strip therein; 
           [0096]      FIG. 41  is a perspective view of a “flip top” cellular phone showing the hinge gap; 
           [0097]      FIG. 42  is a perspective view of a PDA showing the hinge gap; 
           [0098]      FIG. 43  is a perspective view of a personal DVD player showing the hinge gap; 
           [0099]      FIG. 44  is a side elevation of an alternative embodiment of a strip captivating locking clamp of this invention, shown using an ordinary padlock; 
           [0100]      FIG. 45  is a top view of the base portion of  FIG. 44 ; 
           [0101]      FIG. 46  is a side elevation of the handle portion of the alternate embodiment clamp of  FIG. 44 ; 
           [0102]      FIG. 47  is a bottom view (in the direction of arrow “ 47 ” in  FIG. 46 ) of the handle of  FIG. 46 ; 
           [0103]      FIG. 48  is a top plan view of a further alternate embodiment for a locking strip of this invention; 
           [0104]      FIG. 49  is a perspective view of the locking strip of  FIG. 48  secured to a stud attached to the work surface by the use of a padlock; 
           [0105]      FIG. 50  is a perspective of an alternate method of securing the locking strip of  FIG. 48  by the use of a secure cable and a cable lock; 
           [0106]      FIG. 51  is a perspective view of yet another method of securing the locking strip of  FIG. 48  by virtue of a free cable with attached stop member; 
           [0107]      FIG. 52  is a perspective view of one embodiment of a plunger-type security lock of the invention; 
           [0108]      FIG. 53  is a plan view of another embodiment of a plunger-type security lock of the invention; 
           [0109]      FIG. 54A  is a plan view of the plunger-type security lock of  FIG. 53 , seen along A-A therein; 
           [0110]      FIG. 54B  is a cut away view of the plan view of the plunger-type security lock as shown in  FIG. 54A ; 
           [0111]      FIGS. 55A and 55B  are alternative perspective views of a cylindrical sliding key receptacle; 
           [0112]      FIG. 56  is a perspective view of a cylindrical plunger; 
           [0113]      FIG. 57  is a perspective view of a sliding key; 
           [0114]      FIGS. 58A and 58B  are bezels; 
           [0115]      FIG. 59  is a perspective view of the security apparatus of this invention engaged with a computer tablet; 
           [0116]      FIG. 60  is a perspective detail of the apparatus of  FIG. 59  showing a close-up of the proximal locking mechanism with a pin lock; 
           [0117]      FIG. 61  is a perspective view of the security apparatus with the computer tablet removed for clarity; 
           [0118]      FIG. 62  is a perspective view of the proximal locking mechanism in the closed or engaged position; 
           [0119]      FIG. 63  is a perspective view of the proximal locking mechanism in the open position as it would be when engaging or disengaging the security apparatus to or from a tablet; 
           [0120]      FIG. 64  is a perspective detail of an embodiment of this invention with adjustment for accommodating different sized tablets or similar devices by using a movable distal engagement pocket; 
           [0121]      FIG. 65  is another adjustable embodiment using a telescoping chassis bar; 
           [0122]      FIG. 66  is a perspective drawing of a security slot in the housing of a piece of equipment; such as a laptop computer; 
           [0123]      FIG. 67  is a perspective drawing of a security slot attachment of this invention, shown installed in the security slot of  FIG. 66 ; 
           [0124]      FIG. 68  is a perspective drawing of a lock attached to the security slot attachment of  FIG. 67 , showing a secure cable installation attached to the lock; 
           [0125]      FIG. 69  is a perspective exploded view of the four major parts of one embodiment of the security slot attachment of this invention; 
           [0126]      FIG. 70  is a perspective view of the assembled security slot attachment; 
           [0127]      FIG. 71  is a side elevation of the attachment showing the locking position and the equipment housing in dashed lines; 
           [0128]      FIG. 72  is a front elevation of the security slot attachment in a locked position with compression foam washer installed; 
           [0129]      FIG. 73  is a side elevation of a combination lock engaged with the security slot attachment of this invention; 
           [0130]      FIG. 74  is a crossection side elevation of a combination lock engaged with the security slot attachment showing the hook more clearly; 
           [0131]      FIG. 75  is a perspective view of pivot block of the preferred embodiment for a security slot attachment; 
           [0132]      FIG. 76  is a perspective view of the guide part of the preferred embodiment security slot attachment; 
           [0133]      FIG. 77  is a perspective view of an assembled security slot attachment of the preferred embodiment; 
           [0134]      FIG. 78  is a side elevation of the security slot attachment showing the locked position of the locking plate in dashed lines for the preferred embodiment; and, 
           [0135]      FIG. 79  is a perspective exploded view of the four major parts of the preferred embodiment of the security slot attachment of this invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0136]      FIG. 1  shows locking base  1  for a notebook computer lock, which is secured to a working surface by fastener holes, such as screw through holes  4  in base mounting pads  3 . A back surface  10  is tilted at angle “X” to provide a good viewing angle of the computer screen. Side panel members  6  with bent tabs  7  provide a space for sliding locking collar  2 . Locking flange  8  with a locking hole, such as padlock hole  9 , is used to secure locking collar  2  with flange  14  via hole  15 , which is in positional registration with hole  9  when mated. Width “W” is wider than the widest notebook computer or other personal electronic device to be accommodated by this locking base system. Locking bar  12 , attached to the distal ends of sides  13 , actually secures the notebook computer or other personal electronic device. This is the preferred embodiment. The display screen portion rests within space  16  between sides  13 . In use, the keyboard portion of a notebook computer or other personal electronic device would deny access to the fasteners, such as retaining screws, in holes  4 . 
         [0137]    Side panel members  6  may have one or more ports  6   a  to accommodate computer cables therethrough. 
         [0138]      FIGS. 2 ,  2 A,  2 B and  2 C show how locking collar  2  is placed over notebook computer screen  19  and then upon flange  14 , and is locked to lower flange  8  via a lock, such as padlock  20 . Keyboard  18  fits between sides  6 . Space  5  is created by a raised back panel  10  so as to permit access to a variety of connectors at the back of computer keyboard portion  18 .  FIG. 2  also shows an optional compartment  42  for a power source accessory  43 , such as an auxiliary battery charger or battery eliminator, wherein compartment  42  extends between power flange  8  and further lower flange  8 A. 
         [0139]      FIG. 2D  shows the notebook computer being used by a person at a work station; 
         [0140]    In an alternate embodiment shown in  FIG. 3 , upright portion  25  supports the entire height of screen  19  above raised back panel  10  mounted upon base pads  3 . This can also be shown in  FIG. 4 .  FIG. 3B  shows another example of a lock  20   a , which can be used in lieu of padlock  20 . 
         [0141]      FIG. 3A  shows a further alternate embodiment where shelves  36  and  36   a  are depicted supporting electronic handheld devices such as folding cell phone  37   a , upright cell phone  37   b , marine VHF radio  37   c , personal digital assistant  37   d , calculator  37   e  and video game pad controller  37   f.    
         [0142]    A transparent panel, such as LEXAN® polycarbonate panel  30 , shown in  FIG. 5 , is used as a locking frame, by sliding it over screen  19  within the four tabs shown in  FIG. 3  at the distal corners of upright  25 . 
         [0143]    Panel  30 , shown in  FIGS. 4-7 , has a top portion  32  and a locking flange  33  with padlock hole  35 . In use, this hole is in positional registration with that of upper locking flange  27  shown in  FIG. 4 . A padlock  20  or other small lock  20   a  can be used to secure the two members together. Front face  31  of transparent panel  30  protects the surface of computer screen  19 . This can be used to advantage in a retail demo environment. Alternately, the locking collar of  FIG. 1  can be used with base of  FIG. 3  by locking into lower locking tab  26 ; this would offer a better unencumbered view of screen  19 . 
         [0144]      FIG. 8  shows the addition of an optional battery pack housing cage  42  feature to the locking apparatus of the embodiment shown in  FIG. 1 , although it can be used with any of the embodiments herein; 
         [0145]    The optional power source component  42  of  FIGS. 2 and 8  can be added to any of the embodiments of this invention, including those shown in  FIGS. 3-51 . It is preferably a cage made of heavy duty wire screen or perforated metal that is attached (as by welding or rivets) to a rear panel, such as panel  41  in  FIG. 8 . This provides a secure compartment  42  for a power source accessory  43 , such as an auxiliary battery, charger, or battery eliminator. 
         [0146]    Compartment  42  is also shown in the side view of  FIG. 9 . 
         [0147]    In a further alternate embodiment, shown in  FIG. 10 , a locking base using a telescoping rod  54  is shown. In this embodiment, there is no member such as locking collar  2  or transparent panel  30  that can be readily removed from the locking base when a computer or other personal electronic device is not secured to the base. This should reduce the incidence of vandalism or theft of the removable item which would render the base unusable. In  FIG. 10 , one end of bar  54  is attached to the left side panel member  51  of base  50  via a pivotable fastener, such as ball joint  53 . After the notebook computer or other personal electronic device is inserted between sides  51  and  52 , bar  54  is swung over the lower (hinge) portion of the notebook computer&#39;s screen, such as a liquid crystal display (LCD) screen and is elongated so as to insert lock plug  55  through locking hole  56  in right side  52 . A lock (not shown), such as padlock  20 , is then inserted through the hole in plug  55  thus locking computer to base. 
         [0148]    Alternate locking members include locking members such as vinyl clad steel cable  60  shown in  FIG. 11 , and the flexible tubing clad chain  65  shown in  FIG. 12 . These two devices do not require a ball joint attachment to left flange  51 . Cable  60  can be simply inserted through a hole in flange  51  and then retaining washer  61  can be permanently attached as by spot welding. Lock plug  55 , used as for telescoping rod, is attached to the distal end of cable  60 . Chain  65  can be attached to flange  51  in a similar fashion by attaching washer  66  to its proximal end after threading through a hole. The distal end of chain  65  has an elongated link  67  with stop washer attached. The padlock is engaged through this link after it emerges through hole  56  in side  52 . 
         [0149]      FIG. 13  shows an alternate embodiment using a separate locking base  81  used with a notebook computer or other personal electronic device lock  80  which slides in from the left so that one or more base pads  87  are retained by one or more brackets  82  on base  81 .  FIGS. 13 and 14  also show a clamp  86  which secures the lock in place by clamping the lock over a working surface, such as a table top  85 . 
         [0150]    A better view of this is the side edge view of  FIG. 14 . Clamp  86  slips over the edge of work surface  85 . Locking bar  84  is captive in left bracket of computer or other personal electronic device lock  80 , but it can swing out to permit access of computer or other personal electronic device display. The distal end  88  is grooved to accommodate a key lock to secure the computer or other personal electronic device as well as lock  80  to base  81 . The long neck portion of base  81  from clamp  86  to brackets  82  positions the computer or other personal electronic device at a convenient distance from the front edge of table working surface  85 . The detail of clamp  86  in  FIG. 13A  shows how screw  92  with optional security head  91  is screwed into the bottom surface of table working surface  85  via pointed end  93 . 
         [0151]      FIG. 13B  shows how tang  97  prevents screw  91  from being loosened when lock  95  is locked via key  96 . Lock  95  can be easily removed from hole  94  in lock bracket  90 . When tang  97  is turned to position  98 , screw head  91  is not obstructed so that it can be removed or tightened. 
         [0152]      FIG. 15  is a top plan view showing details of notebook computer or other personal electronic device lock  80  locked to base  81  with a computer or other personal electronic device display shown in dashed lines in position  117  and keyboard shown in dashed lines in position  118 . Power supply box  100  can pivot open in the direction of arrow  101  on shaft  102  with a retaining cap; it is locked via tang  112 . Notebook computer or other personal electronic device lock  80  is slid into a captive position within brackets  82  retaining the edges of base plates  87  in the direction of arrow  104 . The left end of swinging locking bar  84  (which can swing out in the direction of arrow  103 ) is retained via retaining cap  105  within slotted hole  115  and an oversize hole on front of the left bracket. Key lock  110  grasps rod end  88  of swinging locking bar  84 , which maintains the security of the assemblage via bracket tang  114 , which is part of locking base  81 . Key  111  can be used to remove the lock body from the end of swinging locking bar  84 . 
         [0153]    While  FIG. 13-15  shows a separate over the table locking base  81  used with a notebook computer or other personal electronic device lock  80  which slides in from the left so that base pads  87  are retained by brackets  82  on base  81  of notebook computer or other personal electronic device lock  80 , it is contemplated that a further alternate embodiment includes attaching notebook computer or other personal electronic device lock  80  directly to a work surface  85 , such as a study desk, by providing fastener receptacles within base pads  87 , wherein fasteners, such as screws or bolts fasten base  81  directly to an upper side of the work surface  85 , without the use of over the table base  81 . 
         [0154]      FIG. 16  shows another embodiment of a notebook computer or other personal electronic device lock  130  with a telescoping width adjusting feature to accommodate computer or other personal electronic devices of varying widths more securely. Base pads  136  are compatible with the use of locking base  81  of the previous embodiment to retain this continuous adjustment feature. Locking bar portions  137  and  138  are adjustable in size. 
         [0155]    For example, as in  FIG. 17 , incrementally spaced detents or pins and holes may be used to facilitate width adjustment. 
         [0156]    Alternatively, as in  FIG. 16 , locking bar  137  may be hollow and threaded with a coarse thread; it is captive within left bracket  134  and slotted back hole  133 . Right section of locking bar  138  is screwed into portion  137  and can be quickly length adjusted by twisting it clockwise or counter-clockwise. Horizontal section  131  fits into section  132  in a telescoping fashion. After the notebook or laptop computer or other personal electronic device display is placed between the spread-apart brackets, the brackets are pushed against its sides and swinging locking bar portions  137  and  138  are adjusted accordingly to fit into holes in right bracket  135  for locking. 
         [0157]      FIG. 17  shows a different width adjustable computer or other personal electronic device lock  170  with a discrete locking mechanism including pivoted flange  178  with peg  176  at its distal end. Flange  178  is pivoted on pivot  182 , such as a rivet, attached to outer telescoping member  132  of notebook computer or other personal electronic device lock  170 . When swung in the direction of arrow  179 , flange  178  will force peg  176  through hole  175  in telescoping section  132  and further into one of the holes  180  in inner telescoping member  171  when in positional registration. Flange  178  is locked in position when hole  185  is in positional registration with hole  184  and locking bar  173  end  139  is passed through both. The swinging locking bar includes hollow side section  172  and inner, preferably solid, side section  173 , which is telescopic within outer hollow side section  172 . 
         [0158]      FIG. 18  shows another embodiment  150  of this invention wherein the locking base has been integrated with the notebook computer or other personal electronic device lock. Clamp  153  locks onto work surface  85  as described in a previous embodiment with a separate locking base  81  (see  FIGS. 13-14 ). Upright brackets  151  and  152  with bar  83  between capture the notebook computer or other personal electronic device display which is then locked via swinging locking bar  84  and a key lock (not shown). 
         [0159]    A related embodiment in  FIG. 19  shows integrated base/computer or other personal electronic device lock  160  which has one or more pivot points  164  and  166  (on base part  167 ). Link  165  now pivots in relation to clamp section  163  such that the notebook computer or other personal electronic device lock  160  can be more conveniently positioned on work surface  85 . 
         [0160]    In  FIG. 19 , for example, clamp  163  is placed on the edge to the side of computer or other personal electronic device lock base  167  instead of directly in front of it as would be necessary in the embodiment of  FIG. 18 . 
         [0161]    The preferred low profile locking base embodiment of this invention for consumer use is detailed in  FIGS. 20-27 . 
         [0162]      FIG. 20  shows a low profile locking base  200  with narrow base  202  and low rise back  201 . It is screwed to work surface  285  via fasteners, such as screws  203 . Locking bar  284  with optional rubber or elastomer grommets  205  and machined end  288  is used to lock the display of a notebook or laptop computer or other personal electronic device (not shown) to locking base  200 . End  288  is passed through hole  204  and locked with pin lock  110 . Key  111  is used to unlock and remove the computer or other personal electronic device. 
         [0163]    The preferred simpler method of use of a locking base is not to screw it down as shown in  FIG. 20  but instead to create a portable locking kit by adding a clamp  211  and cable  210  as shown in  FIG. 21 . 
         [0164]    Due to the low profile design with a narrow base, all components of the portable kit conveniently fit into a tubular carrying case (not shown). 
         [0165]      FIG. 21  also shows Clamp  211  having a fastener, such as a screw subassembly, including screw  212  and short container, such as a cylinder  216 , with transverse cable attachment hole  213 . At the first end of cable  210  is a ferrule  215  with a transverse hole. This fits through hole  213 . The cable is threaded through hole  213  after clamp  211  is secured using the appropriate tool to tighten screw  212 . The distal end of cable  210  has ferrule  214  with enlarged end which does not fit through hole  213 . 
         [0166]      FIG. 22  shows the arrangement more clearly. It is noted that cylinder  216  has distal hole  220  which accommodates the screw head and also has a screw clearance hole  221  on its top surface. After cable  210  is threaded through hole  213 , a tool cannot reach screw head  222  to loosen clamp  211  since access is denied through distal hole  220 . After cable  210  is installed through cylinder  216 , the end  288  of locking bar  284  is passed through the transverse hole in ferrule  215  prior to locking bar  284  to base  200 . 
         [0167]    In an alternate embodiment of the clamp screw subassembly no tool is required to tighten or loosen clamp  211 . 
         [0168]    For example, an exploded view of subassembly  230  is shown in  FIG. 23  with end cap  231  pushed down over clamp screw  233  and press fit into the end of knob  235 . Optional pins  238  can be driven radially to insure positive attachment. Cap  231  has screw clearance hole  232  at its center. Screw  233  becomes captive as a subassembly with tall head  234  within knob  235  once cap  231  is attached. Offset transverse hole  237  in knob  235  goes through both walls and is sized for cable attachment. 
         [0169]      FIG. 24  shows the underside of cap  231  revealing hexagonal recess  240  sized to engage bolt head  234 . 
         [0170]      FIG. 25  is a top view of subassembly  230 . In the side cross-section of  FIG. 26 , bolt head  234  is seated in recess  240  of cap  231 . This is prior to the insertion of cable  210  through holes  237 . Clamp  211  can be tightened in this depicted configuration by turning knob  235  since recess  240  acts as a socket wrench to bolt  233 . It is noted also that the size of head  234  interferes with the placement of hole  237  thereby preventing insertion of cable  210  while head  234  is seated in recess  240 . 
         [0171]    If knob  235  is pushed up as shown in  FIG. 27 , cable  210  can now be easily inserted through holes  237  adjacent to screw  233  and spacing head  234  away from recess  240 . In this configuration with cable  210  installed through knob  235 , if turned, knob  235  will spin freely regardless of the up or down forces exerted. Clamp  211  can only be removed after cable  210  is removed and head  234  is re-seated in recess  240 . In lieu of a non-standard screw  233  with tall head  234 , a standard hex screw can be used with a nut screwed up against the head and adhesively bonded as a unit. A washer between the nut and the screw head would only enhance the operation creating a more positive barrier with cable  210 . 
         [0172]    In an alternate protruding member locking embodiment of this invention, spikes, security rods or strips are used to secure a personal electronic device, such as a notebook computer, cell phone, personal digital assistant (PDA) or electronic music and/or video player (i.e. iPod®). 
         [0173]    For example, in  FIG. 28 , a notebook computer or other personal electronic device with base  275  and display  276  is shown. One of the three through-holes is required for this embodiment. Hole  278  is at the hinge line, while hole  279  is through the display housing; hole  277  is diagonally through one of the front or rear corners of the base. 
         [0174]    In the alternate locking embodiment shown in  FIG. 28A , a notebook computer  500  has a through hole  503  in the display portion which aligns in positional register with through hole  504  in the base or keyboard portion  502  when in the closed position. A protruding lock, such as, for example, padlock  505  with elongated hasp  506 , is used to prevent display portion  501  from being opened in a usable position. In addition, if a secure cable with a loop on its distal end is in the vicinity, this loop can also be engaged by hasp  506  thereby securing computer  500  to fixed location. Other protruding locks, such as spikes, security rods or strips, can also be used to lock display portion  501  with keyboard portion  502  when in the closed position. 
         [0175]      FIGS. 28B-D  illustrate yet another locking embodiment for notebook computer  515  with display  516  which has a security hole  517  in the upper right corner of display portion  516 . Hole  517  is a through hole.  FIGS. 28C and 28D  illustrate how the apparatus of  FIG. 29  (without spike  285 ) is used to secure computer  515 . Ferrule  286  is passed through hole  517  and locked by pin lock  110 . In this manner cable  210  attaches computer  515  to secure table top clamp  211  or to another securing member, such as a table leg of the work surface upon which notebook computer  500  is placed. 
         [0176]    It is further noted that ferrule  286  can also be used to lock notebook computer  500  in place in the closed position as in  FIG. 28A , or the hasp  506  of  FIG. 28A  can also be used to lock the display portion  516  of notebook computer  500  instead of ferrule  286  and pin lock  110  shown in  FIG. 28C . 
         [0177]      FIG. 29  shows locking rod or spike  285  which is inserted in any of the three hole locations discussed. Ferrule  286  with a groove near its distal end is then inserted through the transverse hole of spike  285  and locked with pin lock  110 . Ferrule  286  is securely attached to cable  210  which had been passed through knob  235  after clamp  211  had been tightened at the edge of a table or desk top. In this manner, the illustrated notebook computer or other personal electronic device is secured via a secure cable. 
         [0178]    In a variation of this embodiment, the separate spike  285  is replaced by a captive security rod  291  as shown in  FIG. 30 . Note that rod  291  may be attached either to one end of the hinge or alternatively to the top surface of the base of computer or other personal electronic device  290  at any convenient location where space permits. Rods  291  are stored in a recessed position with only a small knob protruding so that they may be easily grasped to unlock into the extended position to expose a transverse hole. Ferule  286  and lock  110  are then used in the same manner as with the separate spike  285 . 
         [0179]    In another spike variation shown in  FIG. 31 , long spike  296  is used to secure computer or other personal electronic device  294  which has a hole  295  through its base. Hole  295  is placed over pre-existing hole  298  through table top  293 ; then spike  296  is inserted such that transverse hole  297  is accessible beneath table top  293 . Then transverse pin  299  with a groove adjacent its distal end is inserted through hole  297  and locked with pin lock  110 . Thus this variation locks a notebook computer or other personal electronic device using a spike without the aid of a cable. 
         [0180]    In another embodiment shown in  FIG. 32  with a flexible locking strip  301 , a detail of notebook computer  304  with display  305  and keyboard portion  306  is shown adjacent to clamp  302 . Flexible locking strip  301  is shown prior to insertion through the hinge gap between display  305  and keyboard  306  (not shown) and further between bottom jaw  314  and top movable jaw  312  of clamp  302 . 
         [0181]    In lieu of being inserted within a hinge gap, flexible locking strip  301  may be inserted within a thin, longitudinally extending slot, similar to holes  277 ,  278 ,  279  for rod  285  of  FIG. 29 . 
         [0182]      FIGS. 33 ,  36  and  37  show other features of clamp  302  with movable top  311  and stationary base  313 . Locking strip  301  is clearly shown in top view and side view in  FIGS. 34 and 35  respectively. Wedge stop  325  is shown at one the proximal end with narrow rectangular strip  326  at the distal end. Wedge stop  325  is preferably plastic which is bonded to strip  326  as by overmolding. It is noted that base portion  313  of clamp  302  is typically screwed to work surface  303  via screws  322 , however, alternatively security cable  320  with secured distal end (not shown) can be used. 
         [0183]    Gripping means, such as serrations  337  in  FIG. 36 , form lower static jaw  314  of  FIGS. 32 and 33 ; they engage strip  301 . Hole  336  is used for optional cable  320 . Holes  322   a  accommodate fasteners  322 , such as screws. Rectangular holes  335  accept tabs  339  of upper movable jaw  311  to form a hinge. The vertical wall  313   a  of base  313  can be alternatively joined to movable section  311  via ordinary hinges. 
         [0184]    As in  FIGS. 38 and 39 , spring  319  tends to keep jaws  312  and  314  slightly apart unless lock  317  is locked via key  318 . In that case if key  318  is rotated while moving member  311  is pressed down, lock tang  331  will engage lock recess  316  at the distal end of spring  319 ; recess  316  is attached to base  313 . This action will lock locking strip  301  between jaws  312  and  314 . Note that lock  317  is attached to hinged part  311  via a fastener, such as lock nut  330 . 
         [0185]      FIGS. 40-43  show notebook computer  304 , cellular phone  346 , PDA  347  and personal DVD player  348  each with hinge gap  345 . In addition, the entry path of locking strip  301  is shown by arrows in  FIG. 40 . 
         [0186]      FIG. 40  also shows a further alternate embodiment whereby the housing of notebook computer  304  contains a slot  326  for insertion of a flexible or rigid locking strip  328  therethrough. 
         [0187]      FIGS. 44-47  relate to an alternate embodiment of clamp  355  which incorporates a leaf spring  358  to impart locking force to locking strip  301  when shackle  366  of padlock  365  is passed through lock loops  362  and handle loop  376  (as in  FIG. 46 ). In this embodiment, shallow recess  359  with transverse serrations aggressively grasps strip end  326  under bending force of spring  358 , which itself can have optional transverse serrations on its contact surface. 
         [0188]    When handle  357  is free to swing up, strip end  326  can be easily passed between brackets  371  which are spaced apart a distance “W” (as in  FIG. 45 ) to accommodate the width of strip end  326 . Base  356  is secured to work surface  303  via fasteners, such as screws  369 , which are passed through countersink holes  367  (as in  FIG. 45 ). Leaf spring  358  is swaged or brazed at region  363  within slot  373  of handle  357 . Hole  375  in loop  376  accommodates shackle  366 . It is noted that spring  358  has to be bent somewhat for handle  357  to be in registration with the holes in padlock brackets  362 . This bending also permits clamp  355  to accommodate strip ends  326  of varying thicknesses. Also, with respect to the geometry of spring  358  in  FIG. 44 , if a pulling force is placed on locking strip  301 , frictional forces will tend to rotate the free end of spring  358  in a counter-clockwise direction thereby increasing clamping force on strip end  326 ; this further counteracts the pull-out force. Since spring  358  is wider than handle  357  (as in  FIG. 47 ), centering washers  377  are used on either side of it to increase the combined width to X which is just slightly smaller than W. Rivet  360  in brackets  361  acts as an axle for handle  357 ; hole  372  is a clearance fit for rivet  360 . 
         [0189]      FIG. 48  illustrates alternate embodiment locking strip  390  with locking wedge  391 , strip  393  and end hole  392 . Locking strip  390  may be rigid or flexible. 
         [0190]    Dashed lines  305  of  FIG. 48  show the position of a computer display if this is being secured. Added hole  392  permits at least three non-clamp locking methods to be used. These are illustrated in  FIGS. 49-51 ; for clarity, no item is shown being locked in these  FIGS. 49-51 . 
         [0191]    It is understood that instead of being inserted through a hinge gap, locking strip  390  may be first passed through a thin, longitudinally extending slot in the housing of the personal electronic device, such as a notebook computer, instead of a round hole provided for a rod  285  or  296 , as is shown in  FIGS. 29-31 . In this case, the thinness of the slot  327  for strip  328  minimizes any intrusion into the interior of the walls of the personal electronic device, such as a notebook computer  305  and the like, with its intricate wiring located in a tight space within the walls of the notebook computer  305 , or other personal electronic device. 
         [0192]    The strip  390  may be a rigid rectangle or other geometric shape. Additionally strip  390  may be flexible. If flexible, strip  390  may pass through a slot in the housing of the personal electronic device, or if the device is hinged, through a hinge gap between the display of the device and the main body of the device being secured. 
         [0193]    In  FIG. 49 , stud  395  is attached to and protrudes from work surface  303 . Hole  392  is simply passed over the distal end of stud  395  and then the shackle of padlock  397  is passed through the transverse hole in stud  395  to lock strip  390 . 
         [0194]    In  FIG. 50 , secure cable  400  with collar  402  and a rigid stud at its distal end is used to secure strip  390 . After the rigid stud is passed through hole  392 , cable lock  401  is snapped over the end of the stud thereby securing strip  390 . 
         [0195]    In  FIG. 51 , free cable  405  with lock member  406  permanently attached is passed through hole  392 . Since member  406  is a bulge larger than the diameter of hole  392 , locking strip  390  will be secured when the distal end of cable  405  is looped or otherwise secured to work surface  303  or to some point adjacent to it. 
         [0196]    The plunger type security lock will now be described with reference to  FIGS. 52 ,  53 ,  54 A,  54 B,  55 A,  55 B,  56 ,  57 ,  58 A and  58 B. 
         [0197]      FIG. 52  depicts a perspective view of a plunger-type security lock  500  of the invention. While security lock  500  is designed for use with electronic devices such as notebook computers and like devices, e.g., those with a base connected by a hinge to an upper section typically comprising a display device, the invention is not limited thereto. The invention is not limited to what is to be locked or secured, but only that the object to be locked or secured have a hinge or through hole through which a flexible locking strip may pass to its stopping means (e.g., wedge), which is then hooked or captured by the end of the sliding key of the security look, as will now be described in detail. 
         [0198]    Plunger-type security lock  500  includes a cylindrical sliding key receptacle  502 , shown in the perspective views of  FIGS. 55A and 55B . The cylindrical sliding key receptacle comprises a slotted, first cylindrical portion  504  and a second cylindrical portion  506 . The slotted, first cylindrical portion  504  includes a first end formed with a slot  508  extending longitudinally through to its other end, and opening into the second cylindrical portion. The second cylindrical portion is formed as an open cylindrical cavity  510  that is contiguous with the first cylindrical portion&#39;s open slot  508 . 
         [0199]    A locking member  512  (for example, a ferrule) is arranged on an outer cylindrical surface of the second cylindrical portion  504  of the sliding key receptacle  502  that is configured for attachment to a cable  513 . The cable is then attached to a stationary object such as a post, pillar, heavy desk, or other fixture that is substantially immobile. 
         [0200]    A cylindrical plunger  516 , having a pushing end  518  and a cylindrical plunger end  520 , is configured for insertion into the second cylindrical portion of the sliding key receptacle  502 . A sliding key  522 , comprising a flat, longitudinal member constructed with a rectangular cross-section that includes a hooking end  524  and a plunger-contact end  526 , which sliding key is configured with a key definition (see rectangular cut out teeth) and for slidable spring-loaded operation within (slot  508 ) the slotted, first cylindrical portion  504  in cooperation with the cylindrical plunger  516  and spring  528  in order to extend and hook a flexible locking strip and retract with and lock the locking strip  514  in locking state. 
         [0201]    A locking mechanism  530  defines the locking state in cooperation with the key definition. Locking mechanism  30  comprises a plurality of number dials  532  (four in the embodiment shown) arranged about an outer surface of the slotted, first cylindrical portion  508  to prevent the extending of the sliding key  522  when arranged in the locking state and to allow extending of the sliding key when in an unlock state. The locking state and unlock state are correlated to a numerical setting of the number dials in cooperation with the key definition. Spring washers (not shown in the drawing) are included to maintain the number dials, as well as a finger grip flange  534  (not shown in the  FIG. 51  embodiment). 
         [0202]    The locking member  512  or ferrule preferably comprises a cable for tethering the security lock to an anchoring means, such as a desk or stanchion, without limitation. The locking strip  514  for which the hooking end  526  of the sliding key  522  is configured to hook when extending from the sliding key receptacle  502  is configured with a blocking end  515 , and to slide through an electronic device ( 304 ;  FIG. 40 ), i.e., via a through opening, up to the blocking end. For example, a through opening may comprise a hinge gap between two parts. The blocking end may be formed as a wedge. In this way, the electronic device is secured to the plunger-type security lock ( 500 ) when in a locking state. 
         [0203]    A bezel  540  is arranged about an outside diameter of the open end of the slotted, first cylindrical portion  504  of the sliding key receptacle  502 ; through which a portion of the longitudinal member of the sliding key  522  extends and retracts. 
         [0000]    Spring  528  is positioned to cooperate with the sliding key  522 , the sliding key receptacle  502  and the plunger  516  to provide the spring loaded sliding key movement in cooperation with locking mechanism  530 . 
         [0204]    In another embodiment, the invention comprises an electronic device with security locking system. The electronic device  305  is required t have a through slot, such as a hinge gap ( FIG. 40 ). A flexible locking strip  514  includes an insertion end  517  and a stopping end  515 , configured for insertion partially through the through slot or hinge gap up to the stopping end  515 . A plunger-type security lock ( 500 ) comprising a cylindrical sliding key receptacle  502  with a slotted, first cylindrical portion  504  and a second cylindrical portion  506 , a locking member  512  arranged on an outer cylindrical surface of the second cylindrical portion  506  of the sliding key receptacle  502  is configured for attachment to a tether means (i.e., cable, chain, etc.)  513 , a cylindrical plunger  516 , a sliding key  522  including a hooking end  526  and a plunger-contact end  524  that is configured with a key definition (cut out teeth) and for slidable spring-loaded operation within the slotted, first cylindrical portion  504  in cooperation with the cylindrical plunger  516  to extend and hook the flexible locking strip  514  and to retract with and lock the locking strip  514  in locking state and a locking mechanism  530  that defines the locking state in cooperation with the key definition. 
         [0205]    In another embodiment, the invention includes a locking assembly for a notebook computer or other personal electronic device having a visual display portion attached to a keyboard base portion by a hinge. The assembly includes a notebook computer or other personal electronic device with visual display portion separated from a keyboard base portion by a hinge A flexible locking strip including an insertion end and a stopping end, configured for insertion partially through the hinge up to the stopping end. 
         [0206]    A plunger-type security lock  500  comprising a slotted, cylindrical sliding key receptacle  502 , a locking member  512  or ferrule is arranged on an outer cylindrical surface of the sliding key receptacle  502  and is preferably attached to a tether means (e.g., cable or chain)  513 . A cylindrical plunger  516  is included, as well as a sliding key  522  formed to include a hooking end  526  and a plunger-contact end  524 . The sliding key is configured with a key definition to capture the numbers dialed in via the locking mechanism. A spring  528  is included to provide for spring loaded sliding key cooperation with the plunger and locking mechanism  530  within the slotted, cylindrical sliding key receptacle to extend and hook the flexible locking strip  514  and to retract with and lock the locking strip  514  in locking state. 
         [0207]    In the embodiment shown in  FIGS. 59-65 , the security apparatus of this invention is designed to engage diagonal corners of an electronic tablet (such as an iPad®). 
         [0208]      FIG. 59  shows apparatus  600  engaged with tablet  601  and securely locked to it via combination pin lock  607 , such as, for example, plunger lock  500  of  FIGS. 52-58 . Distal corner pocket  606  engages one corner while proximal lockable corner pocket  608  assembly engages the diagonally opposite corner of tablet  601 . 
         [0209]      FIG. 60  is a close-up detail view showing the engagement of pin lock  607 . Cable  609 , which is attached to lock  607  is used secure tablet  601  by engaging one corner thereof within proximal lockable corner pocket  608 . 
         [0210]    Security apparatus  600  is more clearly shown in  FIG. 61  which now reveals flat metal chassis bar  604  connecting distal pocket  606  to proximal pocket assembly  608 . Note stud  611  attached to lock  607 ; it is permanently secured to cable  609 . 
         [0211]      FIGS. 62 and 63  show proximal locking pocket assembly  608  in the closed and open positions respectively. Note that base  610  extends from the attachment portion to chassis bar  604  to the flanges at the proximal end on the other side of the integral hinge pin housing  618 . Pocket  612  flips up (see  FIG. 63 ) to permit a corner of tablet  601  to be inserted or disengaged. The hingable tail section  614  fits between flange protrusions of base  610 ; when it is co-planar with base  610  (see  FIG. 62 ), the slot of pin lock  607  can be fit over the end and locked by its pin engaging hole  616 . This completes the locking procedure. 
         [0212]    Although purpose-sized security apparatus  600  of this invention can be provided for the most popular tablets or similar devices on the market, an adjustable single unit can also be configured. In one embodiment, the adjustability feature is formed by permitting metal chassis bar  624  in  FIG. 64  to slide through a slot in a modified distal pocket  628 . An array of holes  626  in chassis  624  provides the adjustability by virtue of a friction fit removable locking pin  630  with a large flat head. The pin cannot be taken out once tablet  601  is engaged, but it is simply lifted up for adjustment to permit pocket  628  to slide on bar  624 . 
         [0213]    Another adjustable embodiment  640  shown in  FIG. 65  uses a two-part telescoping metal chassis bar consisting of hollow proximal portion  646  and solid distal portion  642  which fits inside. An array of holes  644  provides adjustability by virtue of friction fit pin  648  with a large flat head. Again, this pin is locked once tablet  601  is installed. This embodiment is more compact for smaller tablets or like items since there is no distal metal bar extending beyond the distal engagement pocket as in embodiment of  FIG. 64 . 
         [0214]    A further embodiment for a security slot attachment assembly is shown in  FIGS. 66-79 . 
         [0215]      FIG. 66  shows a detail view in partial cutaway of an equipment (e.g., a laptop) housing  700  with security slot  710 . This slot is preferably approximately 3 mm by 7 mm, although dimensions may vary with varying equipment. 
         [0216]      FIG. 67  shows the security slot attachment  720  of this invention installed to equipment housing  700 . 
         [0217]      FIG. 68  shows a lock  721  engaged with a security slot attachment  720  (not shown in this view, since it is obscured by lock  721 ). Cable  722  is shown attached to lock  721 , lock  721  locked to security slot attachment  720  fixed in slot  710  of housing  700 . Another end of cable  722  is secured to a secure anchor  723 . 
         [0218]      FIG. 69  is an exploded view of the parts comprising one embodiment of security slot attachment  720 . Locking element  730  comprises a generally T-shaped element or end  731  attached to an end of or integrally formed with an elongate rod  732 . A transverse pin hole  733  is shown formed in the opposite end of the rod. Length “L” and width “W” of locking end  731  are also slightly less than the dimensions of slot  710 , to permit insertion of locking end  731  therethrough. A guide  740  is constructed with peripheral wing portions  742  formed upon or with an extended front portion  741  with a contour that follows that of the T-shaped element  731  of locking element  730 . The extended front portion has a through hole  743  to receive and allow through-passage of rod  732  of locking element  730  in a loose fit. That is, the guide is configured to freely rotate about the central axis of rod  732  upon assembly of the security slot attachment  720 . Front portion  742  (with extending wings) rests on the exterior surface of housing  700  after the locking end  731  of locking element  730  and extended front portion  741  of guide  740  is inserted in a security slot in use. 
         [0219]    During security slot attachment  720  assembly, rod  732  is inserted is inserted and passed through hole  743 . A portion of the rod that extends out of guide  740  is inserted into a (in a snug fit) hole  751  of a pivot block  750 . Pivot block  750  also includes two transverse holes  752  and  753 . Transverse hole  733  of rod  732  is aligned with transverse hole  752  of pivot block  750  and pin  755  is inserted in a press fit to secure the rod to the pivot block. While the locking element  730 , guide  740  and pivot block  750  form a subassembly of three parts, locking element  730  (including rod  732  and locking end  731 ) and pivot block  750  operate together as one functional unit, which further includes guide  740  when assembled into a sub-assembly. 
         [0220]    The last member of the security slot attachment  720  is lock plate  760 , with larger rectangular locking hole  761  and pivot bar hole  762 . The lock plate  760  functions to prevent further movement of the locking element  730  (including rod  732  and locking end  731 ), guide and pivot block  750  after placement in equipment by attachment of a locking device through rectangular locking hole  761 . The final assembly step is to invert the subassembly so that hole  753  of pivot block  750  can align with holes  762 , in positional registration with each other, and of lock plate  760 . Pin  764  is a press fit in lock plate  760  but a clearance fit in block  750 . When pin  764  is pressed through lock plate  760  and pivot block  750 , the assembly is complete as shown in  FIGS. 70 and 71 . Once so arranged, lock plate pivots about the axis of pin in such a way that pivot block  750  is positioned within and outside of the large rectangular hole  761  of lock plate  760 . 
         [0221]      FIG. 71  shows the locking plate  760  in the locked position with the pivot block  750 . An unlocked position of the locking plate  760  is designated as  760 A (shown in dashed lines) along the side of exterior portion  742  of guide  740 . T-shaped locking end  731  of locking element  730  is now perpendicular to the side of exterior portion  742  of guide  740  with extending wings  742 . That is, locking plate is able to extend to its open position ( 760 A) only when the longitudinal length of the T-shaped locking end  731  is rotated (about rod  732 ) 90° with respect to the longitudinal length of extended front portion  741  of guide  740 . That is, the extended front portion  741  of guide  740  enters through locking slot  710  and therefore housing  700  separates T-shaped locking end  731  of locking element  730  from exterior portion  742  of guide  740 . (See dashed lines of  FIG. 71 .) 
         [0222]      FIG. 72  shows distal portion or space  768  within rectangular locking hole  761  of lock plate  760  when positioned away from pivot block  750 ; this is the engagement feature where security slot attachment  720  engages the rest of the apparatus that will secure housing  700  to some fixed object in the vicinity. In this arrangement, the locking element  730  (including rod  732  and locking end  731 ) is no longer able to pivot about guide  740  fixed in slot  710  of the equipment and thus, the security slot attachment  720  is no longer able to be withdrawn. Also, an optional compression elastomer foam washer  767  may be added to the lower end of guide  740  under exterior portion  742 . This washer keeps security slot attachment  720  snug to housing  700  when locked by compressing the foam washer to resist any vibration noise coming from the security slot attachment  720 . Such snug fit enhances security. 
         [0223]      FIGS. 73 and 74  show the engagement of a locking member or hook  526  of a lock  721  after same hook is passed through space  768  of the security lock attachment  720 . Lock  721  is described (for example, in drawing  FIGS. 52-58B ) of Co-Applicant Peter Allen&#39;s pending US Patent Application Publication number 2010/0284144, filed Nov. 8, 2011, and incorporated by reference in its entirety herein. The reader should note that the locking plate  760  is shown abnormally long in the views of  FIGS. 73 and 74  to highlight the locking feature in cooperation with a security lock; actually the end of lock  721  is much closer to housing  700 , thereby preventing lock plate  760  from pivoting over. For that matter, the security slot attachment  720  of the invention is limited to use with a lock  721 , as shown, but may be used with any locking mechanism or device that uses a locking clasp capable of passing through space  768  of the locking plate  760  of the security lock attachment  720 , and locking. 
         [0224]      FIGS. 75 through 79  show details of an alternative embodiment of security slot attachment  795  of this invention. In this embodiment, two parts of the security slot attachment  720  ( FIGS. 67-74 ) are modified. That is, pivot block  780  of security slot attachment  795  in  FIG. 75  replaces pivot block  750  of security slot attachment  720 , but its function and attachment remain the same. The three rounded corners of pivot block  780  permit a closer fit and in some cases better accommodate operational clearances. The other modified part (with respect to security slot attachment  720 ) is guide  790  (see  FIG. 76 ). Guide  790  replaces guide  740  of the first embodiment disclosed in  FIGS. 67-74  herein. Exterior portion  791  of guide  790 , which includes extended wings  791  is now wider than front portion  741  of guide  740  of security slot attachment  720 . 
         [0225]    An assembly of an embodiment of security slot attachment  795  is shown in  FIGS. 77 ,  78  and  79 . It is noted that there is only one locking position of lock plate  760  in this embodiment, as shown in dashed lines  760 B in  FIG. 78 . This single locking positional arrangement of lock plate  760  contrasts with the security slot attachment  720  ( FIGS. 67-74 ), where guide  760  can pivot 90 degrees in one direction and 90 degrees in another opposite direction. It is also noted that the entire periphery of security slot  710  of computer equipment housing  700  is covered by parts of security slot attachment  795  in this preferred embodiment, when locked. 
         [0226]      FIG. 79  is an exploded view of the parts comprising security slot attachment  795 . Locking element  730  (similar to security slot attachment  720  in  FIGS. 67-74 ) also has locking end  731  attached to or formed integrally with rod  730 , and including a pin hole  733  for attaching to pivot block  780 . It is noted that while rods  730  are shown with pin holes  733  through which a pin  755  is inserted to fix the rods to the respective pivots blocks ( 750 ;  780 ), the invention is not limited to such fastening means. That is, any other means known to the skilled artisan for attaching the rods to the pivots blocks may be used without deviating from the scope and spirit of the invention. 
         [0227]    Also, like security slot attachment  720 , the length “L” and width “W” of locking end  731  are slightly less than the slot  710  dimensions of computer equipment housing  700 . However, guide  790  has a different configuration than guide  740  ( FIGS. 67-74 ). Guide  790  is constructed with a front portion  791  having a through hole  743  to receive rod  732  of locking element  730  in a loose fit. 
         [0228]    Exterior or front portion  791  of guide  790  rests on the exterior surface of computer housing  700  upon insertion of extended front portion  741  and locking end  731  through the slot  710  in equipment  700  during use. During assembly, rod  732  of locking element  730  is inserted through hole  743  of guide  790  and then into (in a snug fit) hole  751  of pivot block  780 . Hole  733  of locking element  730  is aligned with hole  752  and pin  755  is inserted in a press fit. This forms a subassembly of the locking element  730 , locking guide  790  and pivot block  780 . The final assembly step is to invert the subassembly so that hole  753  of pivot block  780  can align with holes  762  of lock plate  760 , once pivot block  780  is placed within the large rectangular hole  761  of block plate  760 . Pin  764  is a press fit in lock plate  760  but is a clearance fit in block  780 . When pin  764  is pressed through holes  762  of plate  760  and hole  753  of block  780 , the assembly is complete ( FIGS. 77 and 78 ). 
         [0229]      FIG. 78  highlights the position of locking plate  760  in the locked position as  760 B (dashed lines) along the side of exterior portion  791  of guide  790 . As shown, locking end  731  of locking element  730  is now perpendicular to the side of  791  of guide  790 . The front part  741  of guide  790  enters through locking slot  710  and computer housing  700  separates locking end  731  from exterior portion  791  of guide  790 . (See dashed lines of  FIG. 78 .) 
         [0230]    In the foregoing description, certain terms and visual depictions are used to illustrate the preferred embodiment. However, no unnecessary limitations are to be construed by the terms used or illustrations depicted, beyond what is shown in the prior art, since the terms and illustrations are exemplary only, and are not meant to limit the scope of the present invention. 
         [0231]    It is further known that other modifications may be made to the present invention, without departing the scope of the invention, as noted in the appended Claims.

Summary:
A lock includes an assembly of a slot engaging member insertable in a slot of a piece of equipment being locked, such as a portable or desktop computer, a laptop, notebook or other handheld electronic device, a monitor, a television/video screen, a video game, an electronic instrument such as an oscillator or a medical centrifuge or other analytical device, or the like. The slot engaging member is lockable by a dual action rotation and pivoting of an anchor sub-assembly grasping the slot engaging member; whereby the slot engaging member is unlocked by a reverse dual action pivoting and rotation of the anchor sub-assembly for the slot engaging member; wherein the lock is locked without use of a tool.