SECURITY SYSTEM

• US 3,786,502 A
• Filed: 12/17/1971
• Issued: 01/15/1974
• Est. Priority Date: 12/17/1971
• Status: Expired due to Term

• Current Assignee: Claude A. Davis, Joseph L. Stendig
• Original Assignee: Claude A. Davis, Joseph L. Stendig
• Inventors: Stendig, Joseph L., Davis, Claude A.
• Primary Examiner(s): Trafton, David L.
• Application Number:
  US05/209,180
• Time in Patent Office: 760 Days
• Field of Search: 340/416,216,331,342,420,280,237S 179/5R
• US Class Current: 340/521
• CPC Class Codes: G08B 13/1409 for removal detection of electrical appliances by detecting their physical disconnection from an electrical system, e.g. using a switch incorporated in the plug connector
• CPC Class Codes: G08B 19/00 Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow
• CPC Class Codes: G08B 25/08 using communication transmission lines G08B13/19658, G08B21/0286, G08B25/016 take precedence

Abstract

An integrated security system including a microswitch monitored, alternating current receptacle adapted to be mounted in a standard wall-box and further adapted to receive a standard twoprong plug and which is connected with a local telephone system to provide a distinct alarm signal upon removal of the plug; additional switching devices are connected with the telephone system to appraise the operator by distinct signals of the occurrence of unauthorized entry, fire and/or smoke at any of a plurality of remote locations.

Claims

1. An alarm system comprising:

a central console including alarm indication means;

a pair of leads in series with said indication means and extending to an area to be protected;

condition responsive means at said area to be protected connected across said pair of leads for shorting same in response to a given condition;

another condition responsive means at said area to be protected connected across said pair of leads for shorting same in response to another given condition;

potential source means in series with said pair of leads and said indication means for generating an indication means energizing signal therein in response to shorting of said pair of leads;

flasher means in series with said another condition responsive means across said pair of leads and responsive to said signal therein for interrupting same at a given frequency to thereby provide an intermittent alarm indication at said operator console; and

said another condition responsive means including a power receptacle having at least one slot extending completely therethrough and switch means including a pair of contacts connected across said pair of leads and having a linearly movable actuating arm protruding into said slot of said receptacle and responsive to removal of a plug from said receptacle for closing said contacts.

2. The invention as recited in claim 1 including a telephone in said area to be protected connected across said pair of leads and being shorted out by either of said condition responsive means upon the occurrence of an alarm condition and including means for energizing said alarm indication means during telephone usage.

3. An alarm system comprising:

a central console including alarm indication means;

a pair of leads in series with said indication means and extending to an area to be protected;

condition responsive means at said area to be protected connected across said pair of leads for shorting same in response to a given condition;

another condition responsive means at said area to be protected connected across said pair of leads for shorting same in response to another given condition;

potential source means in series with said pair of leads and said indication means for generating an indication means energizing signal therein in response to shorting of said pair of leads;

thermally responsive flasher means in series with said another condition responsive means across said pair of leads including a pair of contacts, one of which is responsive to heat generated by current flow therthrough to intermittently open, and being responsive to said signal therein for interrupting same at a given frequency to thereby provide an intermittent alarm indication at said operator console; and

said another condition responsive means comprising a power receptacle having at least one slot extending completely therethrough, and switch means including a pair of contacts connected across said pair of leads and having a linearly movable actuating arm protruding into said slot of said receptacle and responsive to removal of a plug from said receptacle for closing said contacts.

4. The invention as recited in claim 3 wherein said condition responsive means comprises a heat responsive means including a pair of switch contacts connected across said pair of leads which close in response in an excessive heat condition.

5. The invention of claim 4 including trip switch means connected across said pair of leads and actuable in response to movement of a window in said area to be protected for shorting said pair of leads, and thermally responsive flasher means in series with said trip switch means, said thermally responsive flasher means intermittently open circuiting at a frequency different from said given frequency to thereby provide an intermittent alarm indication at said operator console.

6. The invention as recited in claim 5 including smoke detecting means in said area to be protected including switch contacts connected across said pair of leads which close in response to the presence of smoke.

7. A security system for a building having a local telephone system which includes a remote telephone in an area to be protected having telephone lines to an operator console which has a telephone use status indicator comprising in combination:

a heat-responsive means in said area including a pair of switch contacts connected across said telephone lines for shorting said telephone lines and the telephone connected thereto in response to an excessive heat condition causing the generation of a remote telephone use simulating signal at the operator console;

power receptacle means in said area having at least one slot extending completely therethrough; and

switch means including a pair of coNtacts connected across said telephone lines in parallel with the switch contacts of said heat responsive means and having a linearly movable actuating arm protruding into said slot of said receptacle and responsive to removal of a plug from said receptacle for shorting said telephone lines and the telephone connected thereto causing the generation of a remote telephone use simulating signal at the operator console.

8. The invention as recited in claim 7 including a flasher means in series with said switch means and responsive to the remote telephone use simulating signal generated thereby to interrupt same at a first frequency to thereby provide an intermittent indication at said operator console.

9. The invention of claim 8 wherein said flasher means comprises thermally responsive contacts which open in response to heat caused by current flow therethrough and which close upon cooling.

10. The invention as recited in claim 8 including trip-switch means connected to said telephone system in parallel with the switch contacts of said heat-responsive means and actuable in response to movement of a window in said area to generate a remote telephone use simulating signal at the operator console.

11. The invention as recited in claim 10 including another flasher means in series with said trip-switch means and responsive to the telephone use simulating signal due to a window being opened to interrupt same at a second frequency different from said first frequency to thereby provide a second intermittent indication at said operator console.

12. The invention as recited in claim 11 wherein said another flasher means comprises thermally responsive contacts which open in response to heat caused by current flow therethrough and which close upon cooling.

13. The invention as recited in claim 11 including a smoke detecting means in said area connected to said telephone system and responsive to the presence of smoke to cause the generation of a remote telephone use simulating signal at said operator console.

14. The invention as recited in claim 7 wherein said telephone system includes a power supply and telephone use indicator at the operator console and the use of said remote telephone completes a current path from the power supply through the indicator to energize same, and wherein the closure of the switch contacts of the heat-responsive means completes the current path from said power supply through said indicator to energize same as a simulation of telephone use, and wherein the closure of the contacts of the switch means completes the current path from said power supply through said indicator to energize same as a simulation of telephone use.

15. The invention as recited in claim 14 including flasher means in series with said switch means to interrupt the telephone use simulating signal at a given frequency to thereby provide an intermittent indication at said operator console.

16. The invention as recited in claim 15 wherein said flasher means comprises thermally responsive contacts which open in response to heat caused by said simulating signal current flow therethrough and which close upon cooling.