Electrical Circuit Contact Points & 'Gounding' Switch

So you want the door to only open one way (exiting stage) and auto lock when closed, is that correct?

How about something like this?

http://www.doorking.com/pages/dks-acc-maglock.php

You could use controller and door lock from Post #1, for your handle you could also use IR proximity sensor.

A push type switch they use in many hospitals secure wards will do to open. They mount on the wall beside door. You may find that the door latch device may all ready have the switch which secures the door in it for item 1.

These device are pretty silent operating. They will also meet fire codes. Not sure of your application. We don't want anyone lock behind a door if the power goes down.

Thanks for the responses guys. I've had a look at DoorKing and their mag locks are similar to what we have in mind (Padde.com.au). However im not quite there yet. This is a little more abstract description of what im after:

1. Two independent objects that when come in contact form a closed circuit. Such as door leaf and its frame. Is this a proximity switch or sensor?

2. A device that activates on touch. I think this is a capacitance or resistance touch switch?

Anyone have experience with either of the above?

Thanks also to Wikipedia!

Thanks Doorman, that's very helpful. I will try to adapt the TSH with a coverplate for the stage and a door pull for the wings. The DPS could work too. Yet do you know of a similar product that runs a current through it? I've been advised the TSH handles need to release the mag lock via current through the DPS contact as a circuit. I would be really happy to be corrected on this!

"I've been advised the TSH handles need to release the mag lock via current through the DPS contact as a circuit."

No, the circuit doesn't need to run thru a DPS. It is very common to include a door position sensor in the scheme of a magnet lock; this for a number of security reasons. From your discussion here, this application is not really a security issue but a convenience issue. The door position switch is not a required part of the scheme here, as I understand it.

The controlled relay switches are rated at 2 amp 24VDC. While this is sufficient for most conventional door hardware magnets, it may be marginal or insufficient for your application.