Abstract

A smoke generator and driver circuit (46) for controlling and powering a smoke generating canister (38), said driver circuit (46) comprising a power output connected to said smoke generating canister (38) for activation thereof. It comprises a charging unit (50) providing after a charging process sufficient power for igniting and driving said smoke generating canister (38), a switching unit (52) connected to said charging unit (50) and to a first pole (56) of said smoke generating canister (38) for releasing power from said charging unit (50) to said smoke generating canister (38), and a connecting unit (54) connected to a second pole (58) of said smoke generating canister (38) for allowing power to flow through said smoke generating canister (38), wherein activation of both said connecting unit (54) and said switching unit (52) during an overlapping time period is required for activation of said smoke generating canister (38). A method comprises applying a charging signal a charging input of the driver circuit (46), applying a control signal to a connect input of said driver circuit (46), and applying a trigger signal at a trigger input of switching unit (52).

IPC Classes  ?

• G08B 15/02 - Identifying, scaring or incapacitating burglars, thieves or intruders, e.g. by explosives with smoke, gas, or coloured or odorous powder or liquid

Abstract

A smoke generator (100) for anti-burglar purposes comprising canister holding means (805, 815) for holding a canister (810) for chemicals to be used to generate smoke wherein the smoke generator further comprises a smoke deflector (103) arranged below the position of the canister for even distribution of generated smoke, and wherein the smoke deflector (103) have a smoke deflector cavity of sector shape. The smoke generator is provided with a cartridge for the canister to ease replacement of used or expired canister. The smoke deflector is provided with a residual collector (120) to prevent residuals and debris from littering the room where the smoke generator is used.

IPC Classes  ?

• G08B 15/02 - Identifying, scaring or incapacitating burglars, thieves or intruders, e.g. by explosives with smoke, gas, or coloured or odorous powder or liquid
• F41H 9/06 - Apparatus for generating artificial fog or smoke screens

Abstract

A method of supervising intruder alarm systems, each alarm system comprising a plurality of alarm sensors and at least one gateway communicating with a remote alarm receiving centre. The method includes the steps: a) receiving in a first intruder alarm system radio signals transmitted from a second intruder alarm system, b) transmitting from said first intruder alarm system information relating to the received radio signals to said remote alarm receiving centre, c) analysing in said remote alarm receiving centre information received from intruder alarm systems to identify at least one first intruder alarm system and at least one second intruder alarm system capable of exchanging information via radio signals, d) transmitting from said remote alarm receiving centre control signals to said first intruder alarm system and to said second intruder alarm system to operate as a supervising system by monitoring radio signals from the other intruder alarm system operating as a supervised system, e) observing in either one of said first intruder alarm system and said second intruder alarm system absence of the monitored radio signals, and f) transmitting from a supervising alarm system an alarm signal when absence of said monitored signals is detected.

IPC Classes  ?

• G08B 25/00 - Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
• G08B 13/24 - Electrical actuation by interference with electromagnetic field distribution
• G08B 25/10 - Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
• G08B 29/16 - Security signalling or alarm systems, e.g. redundant systems
• G08B 29/18 - Prevention or correction of operating errors

Abstract

A hazard detection subsystem for use in an integrated home security surveillance system. The subsystem has a gateway unit and detection terminals each configured to detect a hazardous condition and issue a hazard signal upon detection of such condition. The gateway unit acts as an interface to the surveillance system to notify the hazardous condition in the form of an aid-requesting signal. The detection terminal is of a universal design which selectively functions as a master and a slave. The master generates a linking hazard signal to all the detection terminals for generating the alarm at each of the terminals, while the slave transmits an aid-requesting signal to the gateway unit in addition to the hazard signal. An assigning means is included in the gateway unit to assign the master to one of the detection terminals that is energized to establish communication first with the gateway unit, and assign the slave to the other detection terminal that is energized to establish communicate later with the gateway unit.

IPC Classes  ?

• G08B 25/00 - Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems

Abstract

A home security surveillance system has a plurality of terminal detectors one of which functions as a master, and the other function as a slave to constitute an in-house alarm network. The in- house network is linked to a server on the side of a service provider to transmit an aid-requesting signal through a gateway unit upon detection of a hazardous condition at each of the terminals. Upon detecting a hazardous condition, each slave transmits a hazard signal through a first communication network to the master which responds to transmit the aid-requesting signal. The aid- requesting signal is transmitted through a second communication network which has a communication protocol different from the first communication network such that the server can receive the aid-requesting signal either from the master or the slave for fail-safe acknowledgement of the hazard condition detected in the customer's home.

IPC Classes  ?

• G08B 1/08 - Systems for signalling characterised solely by the form of transmission of the signal using electric transmission
• G08B 25/00 - Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems

Abstract

A home security surveillance system has a plurality of terminal detectors one of which functions as a master, and the other function as a slave to constitute an in-house alarm network. The in- house network is linked to a server on the side of a service provider to transmit an aid-requesting signal through a gateway unit upon detection of a hazardous condition at each of the terminals. The detection terminal is provided with a configuration means and a set button which, upon being manipulated, activates the configuration means to send a configuration demand to the gateway unit and receive therefrom a configuration instruction by which the detection terminal is assigned as the master and the slave. The gateway unit is arranged to receive the configuration demand and read the master/slave index in its terminal status table so as to prepare the configuration instruction indicating whether such detection terminal is to be assigned as the master or slave.

IPC Classes  ?

• G08B 23/00 - Alarms responsive to unspecified undesired or abnormal conditions
• H04W 84/20 - Master-slave arrangements
• G08B 25/10 - Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems