Intrusion detector system

• US 4,166,273 A
• Filed: 09/19/1977
• Issued: 08/28/1979
• Est. Priority Date: 09/19/1977
• Status: Expired due to Term

• Current Assignee: Diversified Technologies Incorporated (Henkel AG & Co KGaA)
• Original Assignee: Diversified Technologies Incorporated (Henkel AG & Co KGaA)
• Inventors: Riley, Robert E. Jr., McArthur, Barrie
• Primary Examiner(s): Waring, Alvin H.
• Application Number:
  US05/834,119
• Time in Patent Office: 708 Days
• Field of Search: 340/213 R, 340/224, 340/276, 340/412, 340/539, 340/541, 340/551, 340/552, 340/553, 340/558, 340/559, 340/568, 340/570, 325/30, 325/45, 325/64
• US Class Current: 340/539.16
• CPC Class Codes: G08B 25/008 Alarm setting and unsetting, i.e. arming or disarming of the security system

Abstract

An intrusion detector system for detecting the presence of moving targets in one or more surveillance zones and activated either by the presence of the moving target or directly by some positive action for transmitting an alarm signal causing the provision of a predetermined number of pulses having predetermined time periods. A tone generator and control circuitry receiving the timed pulses, generates a combination of multiple tones of discreetly different frequencies during the timed pulses, the combination of multiple tones of each timed pulse being of different frequencies than the combination of multiple tones of each other timed pulse, to provide a tone-coded message that is transmitted to a receiver. Control circuitry of the processor, in response to the initial reception of the tone-coded message, provides a predetermined number of pulses having predetermined time periods compatible with the pulses of a valid tone-coded message so as to have substantially coincident time frames in which appropriate multiple tones can be present, and is operative in response to a particular combination of multiple tones present in each time frame in sequence to provide an output alarm indication.

Claims

1. An intrusion detector system comprising:

(a) means for transmitting an alarm signal,

(b) means operative to receive the alarm signal and to provide an electric signal in response thereto,

(c) means operative in response to the electric signal to provide a predetermined number of pulses having predetermined time periods,

(d) a tone generator operative in response to the pulses for generating multiple tones of discreetly different frequencies during each pulse to provide a tone-coded message, each generator pulse having a combination of multiple tones of different frequencies than the combination of multiple tones of each other generator pulse,

(e) means operative to transmit the tone-coded message,

(f) the means for transmitting an alarm signal including;

(1) a robbery transmitter that is directly activated to provide a first alarm signal, and

(2) an intrusion transmitter for transmitting a signal into a zone under surveillance and receiving a signal from the zone to provide a second alarm signal in response thereto,

(g) the means providing the timed pulses is activated by the second alarm signal, and

(h) means receiving the timed pulses and activating the tone generator to provide a multiple tone combination during one timed pulse to indicate a burglary, and receiving the first alarm signal and activating the tone generator to provide a different multiple tone combination during the said one-timed pulse to indicate a robbery.

2. An intrusion detector system as defined in claim 1, in which:

(i) a camera is operative in response to the first alarm signal to photograph the robbery zone.

3. An intrusion detector system comprising:

(a) means for transmitting an alarm signal,

(b) means operative to receive the alarm signal and to provide an electric signal in response thereto,

(c) means operative in response to the electric signal to provide a predetermined number of pulses having predetermined time periods,

(d) a tone generator operative in response to the pulses for generating multiple tones of discreetly different frequencies during each pulse to provide a tone-coded message, each generator pulse having a combination of multiple tones of different frequencies than the combination of multiple tones of each other generator pulse,

(e) means operative to transmit the tone-coded message,

(f) the means for transmitting an alarm signal including;

(1) a robbery transmitter that is directly activated to provide a first alarm signal, and

(2) an intrusion transmitter for transmitting a signal into a zone under surveillance and receiving a signal from the zone to provide a second alarm signal in response thereto,

(g) the means providing the timed pulses is activated by the second alarm signal,

(h) means receiving the timed pulses and activating the tone generator to provide a multiple tone combination during one timed pulse to indicate a burglary, and receiving the first alarm signal and activating the tone generator to provide a different multiple tone combination during the said one timed pulse to indicate a robbery,

(i) a camera operative in response to the first alarm signal to photograph the robbery zone, and

(j) a recording means operative in response to the second alarm signal for transmitting a pre-recorded message after transmission of the tone-coded message and for recording all sounds in the surveillance zone.

4. An intrusion detector system, comprising:

(a) means operative for transmitting an alarm signal,

(b) means operative for receiving the alarm signal and to provide a predetermined number of pulses having predetermined time periods,

(c) a tone generating and control means receiving the timed pulses and generating a combination of multiple tones of discreetly different frequencies during the timed pulses, the combination of multiple tones of each timed pulse being of different frequencies than the combination of multiple tones of each other timed pulse, to provide a tone-coded message,

(d) means operative to transmit the tone-coded message,

(e) a receiver operative to receive the tone-coded message,

(f) means operative in response to the reception of the first multiple tone, timed pulse of the tone-coded message for providing an electrical start signal,

(g) means operative in response to the electrical start signal to provide a predetermined number of pulses having predetermined time periods compatible with the other pulses of a valid tone-coded message so as to have substantially coincident time frames in order to validate the tone-coded message, and

(h) gating means operative in response to the particular combination of multiple tones present in each substantially coincident time frame in time sequence to provide an output alarm indication.

5. An intrusion detector system as defined in claim 4, in which:

(i) a timing gate means is operative in response to the electrical start signal for providing a predetermined time period in which the other pulses of the tone-coded message must be received.

6. An intrusion detector system, comprising;

(a) means operative for transmitting an alarm signal,

(b) means operative for receiving the alarm signal and to provide a predetermined number of pulses having predetermined time periods,

(c) a tone generating and control means receiving the timed pulses and generating a combination of multiple tones of discreetly different frequencies during the timed pulses, the combination of multiple tones of each timed pulse being of different frequencies than the combination of multiple tones of each other timed pulse, to provide a tone-coded message,

(d) means operative to transmit the tone-coded message,

(e) a receiver operative to receive the tone-coded message, and

(f) means operative in response to the initial reception of the tone-coded message by the receiver to provide a predetermined number of pulses having predetermined time periods compatible with the pulses of a valid tone-coded message so as to have substantially coincident time frames during which appropriate multiple tones can be present in order to validate the tone-coded message, and operative in response to a particular combination of multiple tones present in each time frame in sequence to provide an output alarm indication.