Advanced Protection Door Lock

Most homes and facilities which are 'broken' into with a key are invaded by somebody who has been conveyed the key by a recent locksmith or by the original supplier of the lock. The latter is often a reseller.

Where door locks are mentioned, a smaller version should be similarly constructed and similarly functional for window, intruder protection. Locks should never have electrical or magnetic components. They may fail under duress or with sophisticated readers or Electromagnetic Pulse Technology.

Mobile locksmiths should be eliminated from ever handling a premises door lock. There is too much opportunity for locksmiths to cut themselves a set of keys for a door which they may have refitted. The consequence of a break in may be as grave as murder or grievous assault. Unrecoverable burglary is another.

The solution is for each door to have a deadlatch with two separate latches or bolts and two locking mechanisms, for redundancy, in case on mechanism fails. The lock user would still have time to replace the entire lock while one locking mechanism still holds. It will pay safety dividends to keep at least two spare, whole locks on site.

The lock must maintain primary control from the inner side panel. Subsidiary or lesser control must be allowable from the outside. Key entry must never overcome inner pinch-handle or thumbturn control.

The locks should present small rotational, single action key entry only, from the outside, for both locking mechanisms simultaneously. That fully turn the lock back and the lock will re-extend without counter-rotational pressure. The inside panel of the locks will lock completely with the door closure. Both of the latches closing and re-extending will cause the twin locks to deadlock, and mechanically reflect that on the inside, double lock, pinch-handles (deadlock inner handle). To release the two pinch-handles so that they can turn to release the dead latch, the user would anticlockwise turn a thumbturn on each of the pinch-handles. A slip brake would hold the thumbturn in position. A slip break is any mechanism which acts to hold the turning device in position yet it can be overcome by counter-rotational, finger force. Closing the door would turn the thumbturns back to the door-protection position, automatically. A double anticlockwise rotation would hold the lock back completely, so that the user may step outside without fear of locking themselves out. A hard clockwise turn of the fingers would be required to relock the door on return inside.

Whole locks should be able to have their inner panels unscrewed and removed, to release double the locks which can slide out of the thick, heavy, fire resistant door, as unit complete unit. That renders the door ready to have its lock completely replaced, including the panel, for optimum premises protection. If the door keys cannot be found or recovered, the user simply changes the lock at a safe time to do so. It may be at the next morning's daylight.

For a fire resistant door, the thick timber veneer on both sides of the door must be treated with a fire resistant stain and fire resistant lacquer. The inner structure should be an iron carbide frame with thermal k-lite filler (see the Carbide article). Between the frame and the outer panels a sandwich layer of carbonic copper carbide. Carbonic simply translates to the higher end of the carbon amalgamation spectrum - approaching a covalent and dielectric/capacitive compound. It will heat up and cool slower than ordinary copper and the amalgam will also deform less in heat, as well being less corrosive.

Door locks and the doors and windows of the design outlined will enable families and all other people safe from home and business intrusion - especially when on premises.

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