Re: Metal Plate

[nick markowitz <nmarkowitz@xxxxxxxxx>]

On Dec 15, 9:14=A0pm, "ABLE1" <royboynos...@xxxxxxxxxxxxx> wrote:
> Well it would seem that my absolute guess was spot on.
>
> Oh goodie for me!!!!
>
> Les
>
> "RockyTSquirrel" <gafa@/nospam/usa.com> wrote in message
>
> news:1NadnUIUCITjvLXWnZ2dnUVZ_gCdnZ2d@xxxxxxxxxxxxxxx
>
> > ademco =A0made one back in the 70's =A0that had a complete switch/magne=
t =A0in
> > the
> > jam =A0and a metal plate on the moving part..
> > (no magnet under the metal plate..)
> > the units could be used =A0on a metal door without =A0the metal plate..
> > the unit =A0worked best if the switch/maget =A0was placed in a wooden j=
am,
> > cause if a metal jam =A0the magnet would over time magnetize the jam =
=A0and
> > the
> > switch would become questionable at best....
> > we used hundreds of them up till around 1981.
> > RTS
>
> > "CH=AEIS" <s...@xxxxx> wrote in messagenews:pnSVm.56159$Db2.17754@edtnp=
s83...
> >> "mleuck" wrote...
> >> > On Dec 15, 9:28 am, "Bob La Londe" <nos...@xxxxxxxxx> wrote:
> >> > > Just a metal plate. That's all that was found on the top of the
> >> > > doors.
> >> > > Held down with little nails. It worked for a long time. The plasti=
c
> >> > > contact recessed in the jamb cleared when the doors were close. Wh=
at
> >> > > heck
> >> > > was it and how did it work?
>
> >> > > It finally failed. That's how I discovered this little oddity. I
> >> > > think
> > I
> >> > > recall somebody on here mentioning something like it in the past.
>
> >> > I've seen that before but there was a magnet under that plate, stran=
ge
> >> > setup
>
> >> Which would magntize the plate and keep it working when the door warps
> >> and
> >> alignment is lost???
>
> >> Just guessing... never seen it done.
>
> >> - Chris

Ademco had some really strange contacts and switches back then but
this was also the age when we foiled and you needed all the ornaments
to make things work.
the magnets worked on repulsion theory .