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Security Products

Mather and Platt owned a subsidiary company, Security Lock and Safe (SLS), which was responsible for the security products business. SLS manufactured security alarms and a range of floor, freestanding and wall-mounted safes. The larger safes were cast in the Park Works foundry. Key design features of the safes were a corrugated chilled cast iron outer casing with nickel nuggets embedded in the wall material. The corrugated surface made it difficult to start to drill a hole and using chilled cast iron produced a very hard skin that also made drilling difficult. If drilling did succeed, then the nickel nuggets deflected the drill in an attempt to hamper further progress.

An associated company was Vesta Alarms. Vesta designed and manufactured burglar and fire alarms and all of the associated detection equipment.