Re: What kind of sensor did I see today?

[patrick burke <alarmlease@xxxxxxxxxx>]

Sounds like you came across old time lace wiring. It was used years ago.
   Just a closed circuit laced like a shoe but the wires crossed with
positive and negative single wires. If broken the circuit would open or
if they crossed they shorted and tripped the alarm. As far as using a
ceiling detector many different detectors are not UL rated for Burglary
(Central, Police Connect, Local or the "Extent" coverage rating. Check
with Underwriter's Laboratories about ratings. These are different than
an electrical rating.

Pat Burke
Alarm Lease and Service
New York, New York

P.S. Some of us aren't old, just very experienced.
No offense taken, 36 years in the trade.
Join your local Alarm Association.
Past President, Metropolitan Burglar & Fire Alarm Association


SecurityNovice wrote:
> Hi all.. I am new here.. Looking to learn...I think the more I think I know,
> the more I realize I know so little...  I came upon a very interesting
> install today.. or whats left of it.  Place is in an old building undergoing
> extensive renovations.  There is an old door that resembles something out of
> a stable.. cobblestone drieway, etc.. has to be 75 years old.  Some old time
> alarm guy looks like he protected this door by using what appears to be very
> small guage wire in a back and forth criss cross patern on the iside of the
> door.  I imagine if someone kicked the door in, or maybe kicked at it from
> the outside, the line would stretch, or maybe break?? (not sure on this
> part) and cause an open or closed condition.  Has anyone else seen anything
> like this?  I love goingi into old gun shops or jewelry shops and seeing how
> the old timers did the foil on windows..   Even new systems.. I enjoy
> walking into a store and looking around.. wondering why they opted to go a
> wall mount motion when a 360 ceiling mount would have been better... then
> trying to figure out the logic behind the decision..
>
>