Computer physical security device

• US 5,502,989 A
• Filed: 09/16/1994
• Issued: 04/02/1996
• Est. Priority Date: 01/24/1992
• Status: Expired due to Term

• Current Assignee: ACCO Brands USA LLC (ACCO Brands Incorporated)
• Original Assignee: Kensington Microware Limited
• Inventors: Zarnowitz, Arthur H., Carl, Stewart R., Murray, William R. Jr.
• Primary Examiner(s): Boucher, Darnell M.
• Application Number:
  US08/307,113
• Time in Patent Office: 564 Days
• Field of Search: 70/57, 70/58, 70/14, 70/18, 70/30, 70/49, 70/232, 70/423-430, 248/551, 248/553, 248/505, 411/555, 411/552, 411/553, 411/549, 411/349, 411/343, 411/216, 411/217
• US Class Current: 70/58
• CPC Class Codes: E05B 73/0005 using chains, cables or the like chain- or cable-locks of the padlock type E05B67/003; lockable clothing hangers or hanger racks E05B69/006
• CPC Class Codes: E05B 73/0082 for office machines, e.g. PC's, portable computers, typewriters, calculators
• CPC Class Codes: Y10T 70/40 Portable
• CPC Class Codes: Y10T 70/409 Shackles
• CPC Class Codes: Y10T 70/50 Special application
• CPC Class Codes: Y10T 70/5009 For portable articles

Abstract

An apparatus which inhibits the theft of equipment such as personal computers is disclosed. The equipment must have an external wall provided with a specially designed, approximately rectangular slot having preselected dimensions. An attachment mechanism includes a housing for a spindle having a first portion rotatable within the housing, a shaft extending outwardly from the housing, and a crossmember at the end of the shaft having peripheral dimensions closely conforming to the internal dimensions of the slot. An abutment mechanism also emanates from the housing, and is located on opposite sides of the shaft intermediate the housing and the crossmember. The peripheral cross-sectional dimensions of the abutment mechanism and the shaft in combination closely conform to the dimensions of the slot. The length of the shaft from the housing to the crossmember is approximately equal to the thickness of the external wall of equipment. The crossmember is aligned with the abutment mechanism so that the crossmember can be inserted through the slot with the shaft and the abutment mechanism occupying the slot. The spindle is then rotated 90° to misalign the crossmember with the slot, thereby attaching the attachment mechanism rigidly to the external wall. A cable is secured to the housing and to an immovable object so that the equipment cannot be stolen.

Claims

1. A locking apparatus, comprising:

a housing including a slot engagement member having a slot engaging portion provided with a locking member having a peripheral profile complementary to preselected dimensions of a security slot provided in an exterior wall of a portable electronic device which thereby permits said locking member to extend into said security slot, said slot engagement member being rotatable between an unlocked position wherein said locking member is removable from said security slot, and a locked position wherein said locking member is retained within said security slot;

a pin, coupled through said housing, for extending into said security slot proximate said slot engaging portion when said slot engagement member is in said locked position to thereby inhibit rotation of said slot engagement member to said unlocked position; and

cable attachment means, coupled to said housing, for attaching a cable to said housing.

2. The apparatus of claim 1 wherein said pin includes a first threaded portion, complementary to a second threaded portion in an aperture in said housing.

3. The apparatus of claim 1 wherein said pin extends a distance into the security slot greater than a wall thickness of the external wall.

4. The apparatus of claim 1 wherein a first side of said housing abuts the external wall, said housing includes a cavity and a second side opposite said first side that is open to access said cavity wherein said pin is insertable through said second side and into said cavity to interlock said first side and the security slot.

5. The apparatus of claim 4 wherein said pin includes a first threaded portion complementary to a second threaded portion in an aperture in said first side of said housing.

6. The apparatus of claim 1 wherein said housing includes sidewalls orthogonal to said first side wherein said sidewalls include opposing apertures to permit an object to extend therethrough after insertion of said pin into the security slot to inhibit removal of said pin from the security slot.

7. The apparatus of claim 6 wherein said object is a cable.

8. The apparatus of claim 4 further comprising a spindle adapted for insertion into said cavity, said spindle incorporating said pin at a first end such that insertion of said spindle into said cavity inserts said pin into the security slot through an aperture in said first side.

9. The apparatus of claim 8 wherein said housing includes sidewalls orthogonal to said first side wherein said sidewalls include apertures and a second end of said spindle includes a transverse aperture collinear with said opposing apertures in said sidewalls, said opposing apertures and said transverse apertures permitting an object to extend therethrough after insertion of said pin into the security slot to inhibit removal of said pin from the security slot.

12. The apparatus of claim 1 wherein said locking member is "T-shaped."

10. A removable, lockable, portable electronic device attachment system, comprising:

a cable for attaching to a first object other than a portable electronic device;

a housing, proximate to said electronic device and including a slot engagement member having a slot engaging portion provided with a locking member having a peripheral profile complementary to preselected dimensions of a security slot provided in an exterior wall of said portable electronic device to thereby permit said locking member to extend into said slot, said slot engagement member being rotatable between an unlocked position wherein said locking member is removable from the slot, and a locked position wherein said locking member is retained within the slot;

a pin, coupled through said housing, for extending into said security slot proximate said slot engaging portion when said slot engagement member is in said locked position to thereby inhibit rotation of said slot engagement member to said unlocked position; and

means, coupled to said housing, for attaching said cable to said housing.

11. A cable attachment apparatus, comprising:

a portable electronic device having an exterior wall provided with a security slot;

a housing, adapted to abut said exterior wall adjacent said security slot, said housing including a slot engagement member having a slot engaging portion provided with a locking member having a peripheral profile complementary to said security slot, to permit said locking member to extend into said security slot, said slot engagement member being rotatable between an unlocked position wherein said locking member is removable from said security slot, and a locked position wherein said locking member is retained within said security slot;

a pin, coupled through said housing adjacent to said slot engagement member, for extending into said security slot proximate said slot engaging portion when said slot engagement member is in said locked position to thereby inhibit rotation of said slot engagement member to said unlocked position; and

means, coupled to said housing, for retaining said cable to said housing.