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US 4,112,717 AGranted
Key box
AssigneeSupra Products, Inc.
InventorTerrag W. Bradley
Life of this patent
Estimating the term…
Abstract
A key box in which an inaccessible interior latch secures a drawer in place. An exposed lock can be operated to release the latch. A tumbler lock has forward and rearward tumbler receiving notches of different depths to make picking of the lock more difficult.
Claims5
In a key box,
- a case,
- a drawer slidable into the case,
- first locking means within the case for locking the drawer against removal,
- and second locking means exposed at the exterior of the case for actuating the first locking means and for pushing said drawer outwardly,
- said second locking means having a lost motion action to facilitate actuation of the first lock means prior to exerting a pushing force against said drawer.
2 more elements
A lock having a housing means having an axis,
- a barrel turnable in said housing means formed with axially extending radial slots,
- tumblers axially slidable in said slots,
- said housing means providing a set of notches to receive ends of said tumblers in extreme positions of movement of said tumblers,
- said notches being of different depths.
1 more element
Dependencies are inferred from the claim text.