Virtual Gate and Alarm System

• US 20150077218A1
• Filed: 03/12/2013
• Published: 03/19/2015
• Est. Priority Date: 04/04/2012
• Status: Abandoned Application

• Current Assignee: Desco Industries Incorporated
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Chakkaew, Anusorn
• Application Number:
  US14/387,409
• Publication Number:
  US 20150077218A1
• Time in Patent Office: Days
• US Class Current: 340/5.2
• CPC Class Codes: G07C 9/10 Movable barriers with registering means
• CPC Class Codes: G07C 9/30 not involving the use of a pass

Abstract

Alarm systems that include testing components for determining if static control devices satisfy certain specifications are described. The alarm system includes virtual gate components that generate alarm signals if after a testing component associated with a first subinterval determines a static control device carried by a person satisfies a first specification, a person attempts to cross a second subinterval which does not overlap the first subinterval.

Claims

1. An alarm system, comprising:

a first testing component for determining if a first static control device carried by a first person who is positioned at a first location but not a second location satisfies a first specification, the first location and the first testing component being associated with a first subinterval within a common passageway;

a second testing component for determining if a second static control device carried by a second person who is positioned at the second location but not the first location satisfies a second specification, the second location and the second testing component being associated with a second subinterval within the common passageway, the second subinterval not overlapping the first subinterval;

a first virtual gate component communicating with the first testing component and generating a first alarm signal if after the first testing component determines and communicates to the first virtual gate component that the first static control device satisfies the first specification the first person attempts to cross the common passageway and the second subinterval;

a second virtual gate component communicating with the second testing component and generating a second alarm signal if after the second testing component determines and communicates to the second virtual gate component that the second static control device satisfies the second specification the second person attempts to cross the common passageway and the first subinterval.

2. The alarm system of claim 1, wherein the first virtual gate component does not generate an alarm signal if after the first testing component determines and communicates to the first virtual gate component that the first static control device satisfies a first specification the first person attempts to cross the common passageway and the first subinterval.

3. The alarm system of claim 1, wherein the second virtual gate component does not generate an alarm signal if after the second testing component determines and communicates to the second virtual gate component that the second static control device satisfies the second specification, the second person attempts to cross the common passageway and the second subinterval.

4-6. -6. (canceled)