Anti-ligature mechanical 5-way SOS lockset (PR3S)
The most complete override locking system on an anti-ligature lockset, our 5-way SOS (Staff Override System) lockset provides five override methods to ensure you gain access.
In the most common barricade scenario, the staff key dominates the internal turn/pull, ending the barricade quickly and simply.
There are four additional emergency override methods to overcome determined barricades. We hope you rarely use them, but they may just save a life.
5-way SOS was previously called ‘Twin-Tech’.
Product Information
Most complete override access
We know barricades happen. That’s why we designed our Staff Override System (SOS), with five override methods – ensuring you gain access, even if a service user tampers with the keyway or holds the turn/pull.
Override methods:
1. Key
The lock and the internal turn/pull operate independently, so the key always dominates. It’s a direct mechanical override, so there’s no geared cylinder to disengage the turn/pull or clutch mechanism involved.
2. Keyway
Concealed backup override directly turns the spindle, allowing entry if keyway is blocked with foreign objects, like chewing gum or paper.
3. Turn leverage
T-bar emergency tool provides superior leverage to rotate the turn/pull, even if the service user is stronger.
4. Spindle
Safety spindle shears under heavy resistance, ensuring entry if turn/pull is immobilised. So even in the most serious barricade attempts, where the service user attempts to jam the turn/pull with their bed or body, swift access is achieved without lockcase damage.
5. Pull advantage
T-bar provides significant power advantage to pull the door open – offering better grip than an anti-ligature handle and foiling attempts by a service user to hold the door shut.
Pulling power to override barricades
Using the emergency T-bar tool, staff have a x3 pull advantage over the internal handle – ending barricades quicker.
That’s just another lifesaving detail.
South West Partnership NHS Foundation Trust
As part of an ongoing refurbishment at the Priestley Unit and Priory 2 Ward in South West Yorkshire NHS FT, a mixture of old locks and handles needed replaced due safety concerns with clutched cylinders and the insufficient grip offered by some older handles.
They chose our 5-way SOS (Staff Override System) anti-barricade locksets and Pinch grip anti-ligature handles throughout.
