Security system including a daughter station for monitoring an area and a remote parent station connected thereto

• US 4,651,143 A
• Filed: 06/26/1985
• Issued: 03/17/1987
• Est. Priority Date: 09/25/1984
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Yamanaka, Torao
• Primary Examiner(s): Swann, III, Glen R.
• Application Number:
  US06/748,935
• Time in Patent Office: 629 Days
• Field of Search: 340/691, 340/541, 340/521, 340/525, 340/524, 340/825.06, 358/108, 358/105
• US Class Current: 340/691.1
• CPC Class Codes: G08B 13/19652 Systems using zones in a single scene defined for different treatment, e.g. outer zone gives pre-alarm, inner zone gives alarm
• CPC Class Codes: G08B 13/19695 Arrangements wherein non-video detectors start video recording or forwarding but do not generate an alarm themselves
• CPC Class Codes: G08B 21/0297 Robbery alarms, e.g. hold-up alarms, bag snatching alarms

Abstract

A security system including a television camera for taking a scene of a trespass upon a predetermined region at a site to be monitored, a video recorder for recording the image of the scene taken by the television camera, and a sensor for sensing a trespass and outputting a signal for starting the television camera and the video recorder. The signal output from the sensor for sensing a trespass and the outputs of a plurality of other sensors sensing other conditions at the site to be monitored are transmitted to a monitoring site remote from the site to be monitored for display at the monitoring site.

Claims

1. In a security system including a daughter station unit installed at a site to be monitored for trespass upon said site and a parent station unit installed at a monitoring site remote from the daughter station unit and connected with the daughter station unit through a signal transmission path, said system comprising:

a sensor installed at the site to be monitored for sensing a trespass upon a predetermined region and outputting a signal;

a television camera positioned to produce an image of said predetermined region, said camera being started by said signal;

a video recorder at the site to be monitored connected to said television camera for recording the image produced by said television camera;

means responsive to said signal output by said sensor for transmitting said signal from said daughter station unit to said parent station unit through said signal transmission path; and

means at said parent station for producing a display, upon receipt of said signal in response to said received signal;

said system further comprising a plurality of sensors for monitoring a plurality of different conditions and said daughter station unit including means for converting the outputs of said plurality of sensors and that of said sensor for sensing a trespass into serialized codes; and

means for transmitting said serialized codes over said signal transmission path to said parent station unit;

said system further comprising a monitoring panel connected with said parent station unit for displaying the output of each of said sensors;

said signal transmission path being capable of transmitting only the signals from said plurality of sensors and from said sensor for sensing a trespass.