The burglar alarm employs an electronic barrier, e.g. a light barrier or microwave barrier, with a release signal for the alarm supplied in response to the electronic barrier being broken. The release signal is supplied to a time switching unit. The latter has a pre-alarm store actuated ...
We invite you to take a look around and get to know more about Global Tec Security. The security systems we design cater for your every need. Protecting your business from intruders is of paramount importance. It’s not just the financial loss a break-in can cause, but also the disruption...
while leaving their purses in the seat. Each card said 'I'm a burglar and I just stole your purse.' Of course, the purse was still there, but it got the message across in a big way
The burglar alarm employs an electronic barrier, e.g. a light barrier or microwave barrier, with a release signal for the alarm supplied in response to the electronic barrier being broken. The release signal is supplied to a time switching unit. The latter has a pre-alarm store actuated ...
A burglar alarm is constructed by supplying power continuously to the transmitting unit, and transmitting a steady sinusoidal ultrasonic signal indirectly via the room walls and so on, to the receiving unit. The amplified, received signal is compared with the transmitted one, using connecting cable,...
The burglar alarm employs an electronic barrier, e.g. a light barrier or microwave barrier, with a release signal for the alarm supplied in response to the electronic barrier being broken. The release signal is supplied to a time switching unit. The latter has a pre-alarm store actuated ...
The transmitter unit, normally handheld is altered so that in the burglar alarm mode a continuous battery supplied ultrasonic or infrared signal is generated. The receiver, in the television set is also altered so that any interruption in the signal, caused by an intruder operates a relay and ...