CENTRALIZED SECURITY SYSTEM EMPLOYING A MAGNETIC CHECKING DEVICE

• US 3,781,845 A
• Filed: 06/29/1972
• Issued: 12/25/1973
• Est. Priority Date: 06/29/1972
• Status: Expired due to Term

• Current Assignee: Joseph M. Ellul
• Original Assignee: Joseph M. Ellul
• Inventors: Ellul, Joseph M.
• Primary Examiner(s): Yusko, Donald J.
• Application Number:
  US05/267,292
• Time in Patent Office: 544 Days
• Field of Search: 340/149R,306 346/52 235/61.12N,61.12M
• US Class Current: 340/306
• CPC Class Codes: G07C 1/20 Checking timed patrols, e.g. of watchman
• CPC Class Codes: G07C 9/21 having a variable access code
• CPC Class Codes: G07C 9/27 with central registration

Abstract

A replacement for the watchman'"'"''"'"'s clock and key system employed by security guards to verify that security tours are properly made. In this new system, the guard carries a card with magnetizable rods in it instead of the watchman'"'"''"'"'s clock. He then proceeds to a number of checking stations along the route of his security tour where, instead of the key which is inserted into the watchman'"'"''"'"'s clock, there are a number of boxes into which the magnetizable card is inserted. These boxes contain magnets which may or may not effect the magnetization of the bars in the card. When the tour is completed the guard inserts the card into a reporting station where the magnetic card is checked. If the security tour has been made properly the right rods will be magnetized in a particular manner by the magnets in the boxes and the checking station will send a signal to a central recording station to indicate completion of a properly executed tour. If the tour was not properly made and the proper bars magnetized, no such signal is sent to the recording station and the guard is told so. The guard must then report into the central location or repeat the round.

Claims

1. In a system for verifying the completion of security tours by a guard having a number of checking stations along the route of the tour and a reporting station which the guard reports to upon completion of the tour, the improvement comprising:

a card to be carried by the guard capable of having a message magnetically imprinted on it and changed, and having a first message imprinted on it at the start of the tour;

first magnetic means at at least a plurality of said checking stations into which the guard places the card, each said magnetic means for changing a different portion of the magnetic message on the card so that at the completion of a proper round a second magnetic message is stored in the card irrespective of the order in which the guard visits the checking stations;

circuit means at the reporting station for checking the card for the second magnetic message to determine if the tour had been properly completed, and giving an indication thereof to the guard; and

second magnetic means for changing the message in the card back to the first message so that the card may be used on another tour.

2. The system of claim 1 including recording means for recording the properly completed tours.

3. The system of claim 1 wherein said card is a non-magnetic material having magnetizable members embedded therein.

4. The system of claim 3 wherein said first magnetic means are each a magnet polarized and positioned to change the polarity of one of the magnetic members.

5. The system of claim 4 wherein said circuit means includes means to detect the magnetic polarity of each of the members and compare it to the polarity of that member when the card stores the second magnetic message.

6. The system of claim 5 wherein said magnetic means are magnets to return the polarity of the members to the polarity of that member when the card stores the second magnetic message.

7. The system of claim 6 wherein the members are all polarized in one direction to store the first magnetic message and in a specific combination of different directions to store the second magnetic message.

8. The system of claim 7 wherein the polarization and position of the first magnetic means and the circuit means are both chargeable to vary the second message.