US 5,355,702 AGranted

Security combination key

OwnerAugusto Escribensinventor

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Abstract

A security combination key is provided, which consists of a hollow housing having a removable cover plate. An elongated guide member having an open track therein and a ward groove on a side thereof, extends from one side of the hollow housing. A plurality of blades having serrations extend in parallel relationships from within the hollow housing into the track of the guide member with the serrations exposed in the track. An apparatus is for sliding the blades in the track of the guide member, to form various combinations with the serrations to match up with pin tumblers in specific locks. A device is for locking the blades in a stationary position in the track of the guide member. The guide member having the ward groove can be inserted into a keyway having a compatible set of ward ridges in a cylinder of the lock, allowing the serrations of the blades to properly position the pin tumblers to permit operation of the lock.

Claims2

Dependent claims

A security combination key which will operate at least two different locks which comprises:

a) a hollow housing having a removable cover plate;
b) an elongated guide member having an open track therein and a ward groove on a side thereof, said guide member extending from one side of said hollow housing;
c) a plurality of blades having serrations, said blades extending in parallel relationships from within said hollow housing into said track of said guide member with said serrations exposed in said track;
d) means for sliding said blades in said track of said guide member to form various combinations with said serrations to match up with pin tumblers in a lock, wherein said means for sliding said blades includes:
i) said cover plate having a plurality of parallel slots therethrough;
ii) each said blade having an L-shaped arm bent at a right angle with an elongated handle extending through one said slot in said cover plate;
iii) a plurality of knobs, each to fit upon a distal end of one said handle;
and
iv) combination indicia printed on said cover plate adjacent said slots, so that each said knob can be moved along each said slot and set at one combination indicia;
and
e) means for locking said blades in a stationary position in said track of said guide member, so that said guide member having said ward groove can be inserted into a keyway having a compatible set of ward ridges in a cylinder of the lock, allowing said serrations of said blades to properly position the pin tumblers to permit operation of the lock, wherein said means for locking said blades includes:
i) said blades having a set of teeth along one edge thereof;
ii) a lever pivotally mounted within said hollow housing;
iii) a pawl on a first end of said lever extending inwardly towards said teeth in said blades;
iv) a button on a second end of said lever extending outwardly through said hollow housing;
and
v) a spring affixed between said lever and a portion of said hollow housing, so as to bias said pawl into said teeth of said blades, so that when said button is depressed said pawl will move away from said teeth of said blades to allow said blades to slide.

14 more elements

A security combination key which will operate at least two different locks which comprises:

a) a hollow housing having a removable cover plate;
b) an elongated guide member having an open track therein and a ward groove on a side thereof, said guide member extending from one side of said hollow housing;
c) a plurality of blades having serrations, said blades extending in parallel relationships from within said hollow housing into said track of said guide member with said serrations exposed in said track;
d) means for sliding said blades in said track of said guide member to form various combinations with said serrations to match up with pin tumblers in a lock, wherein said means for sliding said blades includes:
i) said cover plate having an aperture therethrough;
ii) each said blade having a set of teeth along an edge thereof;
iii) a plurality of concentric shafts extending through said aperture in said cover plate and rotatively mounted within said hollow housing;
iv) a plurality of gears each affixed to one said shaft within said hollow housing, so as to engage with said set of teeth on each said blade;
v) a plurality of knobs, each affixed to one said shaft extending through said aperture in said cover plate;
and
vi) combination indicia printed on said cover plate about said knobs, so that each said knob can be turned and set at one combination indicia;
and
e) means for locking said blades in a stationary position in said track of said guide member, so that said guide member having said ward groove can be inserted into a keyway having a compatible set of ward ridges in a cylinder of the lock, allowing said serrations of said blades to properly position the pin tumblers to permit operation of the lock, wherein said means for locking said blades includes:
i) said blades having a second set of teeth along an opposite edge thereof;
ii) a lever pivotally mounted within said hollow housing;
iii) a pawl on a first end of said lever extending inwardly towards said second set of teeth in said blades;
iv) a button on a second end of said lever extending outwardly through said hollow housing;
and
v) a spring affixed between said lever and a portion of said hollow housing, so as to bias said pawl into said second set of teeth of said blades, so that when said button is depressed said pawl will move away from said second set of teeth of said blades to allow said blades to slide.

16 more elements

Dependencies are inferred from the claim text.