Infrared link for security system

• US 6,218,955 B1
• Filed: 02/06/1997
• Issued: 04/17/2001
• Est. Priority Date: 02/07/1996
• Status: Expired due to Fees

• Current Assignee: Harrow Products Incorporated
• Original Assignee: Harrow Products Incorporated
• Inventors: Conklin, Peter S.
• Primary Examiner(s): ZIMMERMAN, BRIAN A
• Application Number:
  US08/796,788
• Time in Patent Office: 1,531 Days
• Field of Search: 340/825.31, 340/825.69, 359/109, 702/78
• US Class Current: 340/5.61
• CPC Class Codes: G07C 2009/00785 by light
• CPC Class Codes: G07C 9/00904 for hotels, motels, office buildings or the like
• CPC Class Codes: G07C 9/27 with central registration

Abstract

An infrared communication system provides a communication link between a stand-alone electrically controlled lock and a centralized control system. A module comprising a transmitter and a receiver is mounted in fixed position to the door frame. A second module comprising a transmitter and a receiver is mounted to the door.

Claims

1. A door security system comprising:

a door frame;

a door pivotally mounted to said door frame, said door having a closed position;

control console means for generating data and transmitting and receiving said data in an electrical data form;

first optical communication means mounted to said door frame and electrically connected to said control console means, said first optical communication means for receiving a transmission of data in an optical data form and transforming said received optical data to said electrical data form and transmitting said data in said electrical data form to said control console means, and for receiving a transmission of data in said electrical data form from said control console means and transforming said received electrical data to said optical data form and transmitting said data in said optical data form;

second optical communication means mounted to said door in line of sight of said first optical communication means, said second optical communication means for receiving said data in said optical data form transmitted by said first optical communication means and transforming said received optical data form to said electrical data form and transmitting said data in said electrical data form, and for receiving a transmission of said data in said electrical data form and transforming said received electrical data form to said optical data form and transmitting said data in said optical data form to said first optical communication means; and

lock means for securing said door to said door frame, said lock means comprising;

a self contained power supply,

access code reader means for receiving access codes and transmitting said access codes,

onboard memory means for storing said data,

lock controller means for automatically controlling said lock means, wherein said lock controller means generates said data in said electrical data form transmitted to said second optical communication means and receives said data in said electrical data form transmitted by said second optical communication means and from said reader means.

2. The door security system of claim 1 wherein said data comprises audit trail data and said control console means receives said audit trail data from said lock controller.

3. The door security system of claim 1 wherein said data comprises lock status data and said control console means receives said lock status data from said lock controller.

4. The door security system of claim 1 wherein said data comprises at least one data type selected from the group consisting of lock commands, lock status information, valid user access codes, alarm signals and audit trail data.

5. The door security system of claim 1 wherein said first and second optical communication means receive and transmit said data in an optical data form within the infrared frequency band.