Mechanical combination locks have been around since the mid-1800s and have not changed much in their design. Current locks consist of three or four, wheels, a lever, bolt, and a cam that accepts a threaded dial spindle which must be “splined” together with a spline key. Splining, or...
To access the remainder of this piece of premium content, you must be registered with Locksmith Ledger. Already have an account? Login
Register in seconds by connecting with your preferred Social Network.
Complete the registration form.
Also new in the design is an integrated bolt detent and relocker (Figure 4). Additionally, there are optional auxiliary bolts for three-way locking, which are not found on currently manufactured locks (Figure 5). In March 2006, the new mechanical combination lock successfully passed VdS testing, including manipulation, and will be submitted very shortly for UL Group 2M testing. The No-Spy dials come in black plastic as well as zamak with mat chrome and gold plating.
For 150 years, mechanical combination locks were essentially the same design and the same inherent problems. Now, a new design solves some old problems as well as creating some cost-effective features.
Nick Gartner is the inventor of Lock Technology’s new mechanical combination lock, and the CEO of the company. He also invented La Gard’s series 1800, 3330, and 3370 locks as well as S&G’s series 8500 MP combination lock. Look for future articles on Gartner’s new security products.
A friend obtained a Sentry ® 5560 Fire-Safe ® at a "bargain price," figuring that I could make the minor repairs and he would have a safe. He was so excited as he spoke, telling me the safe was...
Tips for servicing three-wheel combination safe locks, old and new.