INTRUSION AND FIRE DETECTION SYSTEM

• US 3,634,846 A
• Filed: 04/09/1969
• Issued: 01/11/1972
• Est. Priority Date: 04/09/1969
• Status: Expired due to Term

• Current Assignee: Max Fogiel
• Original Assignee: Max Fogiel
• Inventors: Fogiel, Max
• Primary Examiner(s): Habecker, Thomas B.
• Assistant Examiner(s): Swann, III, Glen R.
• Application Number:
  US04/814,599
• Time in Patent Office: 1,007 Days
• Field of Search: 340/274,276,221
• US Class Current: 340/521
• 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: H04M 11/045 using recorded signals, e.g. speech

Abstract

A burglary and fire detection system in which sensors detect an intrusion into the space to be protected and transmit signals to logical control circuitry. After the signals from the sensors have been processed by the circuitry an alarm condition is sounded and/or appropriate authorities are notified. The system is set with an exit door in open position, and no alarm is transmitted for as long as the door remains open. An alarm is first transmitted after the door has been closed and then reopened.

Claims

1. A method for arming an intrusion detection system and transmitting an alarm upon an intrusion into an enclosed space, comprising the steps of:

opening said enclosed space a first time;

activating said system and setting said system to a first state while said space is open;

inhibiting transmission of said alarm indefinitely while said enclosed space is open for the first time from the instant that said system is in said first state;

closing said space and setting said system to a second state, said system being armed while in said second state;

opening said space a second time and setting said system to a third state; and

transmitting said alarm signal a predetermined time intErval subsequent to said second opening of said space while said system is in said third state.

2. An arrangement for detecting intrusion into a predetermined enclosed space comprising, in combination, at least one opening into said space;

closure means for covering said opening;

which means in proximity of said opening and providing a first signal when said opening is uncovered and a second signal when the opening is closed;

signal-processing means linked with said switch means and having;

first circuit means actuated by said first signal when said opening is first uncovered, second circuit means actuated by said second signal when said opening is covered after said first uncovering, third circuit means connected to said first circuit means and said second circuit means and actuated by said first signal when said opening is uncovered a second time thereafter, and fourth circuit means connected to said third circuit means for emitting a third signal a predetermined time interval subsequent to said second uncovering of said opening, said signal-processing means inhibiting transmission of said third signal independent of time from the instant that said first circuit means is actuated by said first signal to the instant that said second circuit means is actuated by said second signal upon closing said opening after said first uncovering, said opening being uncovered during the interval between said instant that said first circuit means is actuated by said first signal and said instant that said second circuit means is actuated by said second signal.

3. The arrangement as defined in claim 2 including fire-sensing means within said space for sensing the rise and presence of a fire within said space;

and means within said signal-processing means and connected to said fire-sensing means for emitting a signal immediately upon actuation of said fire-sensing means.

4. The arrangement as defined in claim 2 including setting means operatively connected to said signal-processing means for setting said signal-processing means into operative state prior to covering said opening.

5. The arrangement as defined in claim 2 including at least one additional opening with means for covering the same;

sensing means cooperating with said additional opening for sensing when said additional opening is uncovered and covered by the covering means for said additional opening; and

means in said signal-processing means for emitting a signal immediately upon uncovering of said additional opening.

6. The arrangement as defined in claim 2 including indicating means operatively linked to said switch means for indicating the operative state and said switch means.

7. The arrangement as defined in claim 2 including auxiliary sensing means for sensing penetration into said space with said opening remaining covered.

8. The arrangement as defined in claim 2 including sound emitting means operatively connected to said signal-processing means and actuated by said third signal.

9. The arrangement as defined in claim 2 including picture recording means for recording the visual appearance of the interior of said space.

10. The arrangement as defined in claim 2 including visual indicating means operatively connected to said signal processing means and actuated by said third signal.

11. The arrangement as defined in claim 2 including signal-transmitting means connected to said third signal-processing means for transmitting said third signal to a location remote from said space.

12. The arrangement as defined in claim 2 including manually operable switching means within said space and linked to said signal-processing means, said signal-processing means emitting an undelayed signal when said switching means is manually actuated.