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US 4,838,052 AGranted
Lock system
AssigneeSegwill Corp.
InventorsJohn P. Williams, Chin-Jung Huang, Wen-Chyi Shyu
Life of this patent
Estimating the term…
Abstract
An electromechanical key safe includes a housing with a region defined therein. The region can be closed by means of a pivoted door attached to the housing. The door carries an electronic control system as well as a manually operable keypad. In response to entry of a sequence of characters through the keypad, the control system compares the entered sequence to a predetermined sequence of valid combinations. If a match is detected, the matched combination is checked to determine whether or not it is enabled. In the event that a matched combination is enabled, the lock system can be unlocked or actuated. In the event that a predetermined and matched combination is not enabled, the lock system cannot be unlocked.
Claims30
A lock system with a predetermined plurality of valid lock opening sequences with each member of the plurality usable for unlocking only a predetermined number of times, the lock system comprising:
- a housing;
- electrically, activated means, carried by said housing, for moving an unlocking member from a first position toward a second position in response to applied electrical energy;
- means fixedly attached to said housing for entering an operator selectable sequence and for generating a plurality of electrical signals responsive thereto;
- means for comparing said generated plurality of electrical signals to a predetermined plurality of lock opening sequences of electrical signals;
- means for detecting a match between said generated plurality of electrical signals and one of said lock opening sequences and for generating an indicium thereof;
- means for testing whether or not said matched sequence has been previously used the predetermined number of times and for electrically activating said moving means in response to said matched sequence not having been previously used the predetermined period of times thereby causing said unlocking member to move;
- and
- means for automatically setting an indicium indicating that said matched sequence has been used the predetermined number of times.
5 more elements
A lock system for permitting controlled access by an operator with a valid, single use, unlocking sequence to a selected region, the lock system comprising:
- a housing;
- latch means, supported by said housing for extending a locking member to a first, locking, position and retracting said member to a second, unlocking position;
- keyboard means attached to said housing for entering an operator selected sequence and for generating a plurality of electrical signals in response thereto;
- means for comparing said generated plurality of electrical signals to a predetermined plurality of single use lock opening sequences of electrical signals;
- means for detecting a match between said generated plurality of electrical signals and one of said predetermined, single use lock opening sequences and for generating an indicium thereof;
- means, responsive to said detected match, for testing whether or not said matched predetermined sequence has been used and for generating a non-use indicium in response to said sequence not having been used;
- and
- manually operable means cooperable with said latch means for assisting in moving said locking member to said second, unlocking, position only in response to said testing means having generated said non-use indicium.
5 more elements
An electromechanical safe comprising:
- a housing having a plurality of wall members defining a region therein with a pivotably mounted front panel usable to close said region;
- means for locking said front panel to said housing thereby closing said region;
- manually operable means carried by said front panel for entering an unlocking sequence;
- means for comparing an entered sequence to each member of a plurality of predetermined valid, unlocking sequences and for generating an indicium in response to a detected match;
- electrical means, responsive to said indicium for determining if said entered matched sequence has been previously used;
- and
- means for unlocking said front panel in response to said matched sequence not having been previously used.
4 more elements
An electronic lock box unlockable with a combination from a plurality of one-use combinations, the lock box comprising:
- a housing defining an interior region and carrying a movable locking member;
- manually operable means fixedly carried by said housing for entering a predetermined one-use combination;
- electronic means for sensing electrically an entered, valid, but unused combination from the plurality of one-use combinations and for releasing said locking member in response thereto;
- and
- means for marking said combination as valid but used to inhibit subsequent use thereof to release said locking member.
2 more elements
A portable key safe removably attachable to a selected member comprising:
- a housing defining an interior storage region therein;
- a movable door fixedly attached to said housing and manually movable from a first position to a second position;
- manually operable switch means, permanently carried by said housing, for entering unlocking sequences;
- electrically activated means for locking said door, when in said first position, to said housing, thereby closing said storage region;
- control means, coupled to said switch means and said locking means, for detecting an entered unlocking sequence including means for storing a predetermined list of one-time unlocking combinations, and use indicating indicium associated with each said unlocking combination and means for comparing said entered unlocking sequence to at least some of the members of said stored list, including further means for generating a selected electrical signal in response to a match therebetween;
- means for sensing said respective use indicating indicium in response to said selected electrical signal and for generating an unlocking electrical signal in response to non-use of said matched sequence;
- means for activating said locking means in response to said unlocking electrical signal thereby permitting manual movement of said door to said second position and for changing said respective use indicating indicium to a used state;
- and
- means for attaching said housing to the selected member.
6 more elements
A portable key safe removably attachable to a selected member comprising:
- a housing defining an interior storage region therein;
- a movable door fixedly attached to said housing and manually movable from a first position to a second position;
- manually operable switch means, permanently carried by said housing, for entering unlocking sequences;
- electrically activated means for locking said door, when in said first position, to said housing, thereby closing said storage region;
- control means, coupled to said switch means and said locking means, for detecting an entered unlocking sequence including means for generating, one at a time, a predetermined sequence of one-time unlocking combinations, including means for storing a list of each, previously used said unlocking combination, means for comparing said entered unlocking sequence to at least some members of said predetermined sequence and for indicating a match therebetween, means for comparing a said matching unlocking sequence to the members of said used list, including further means for generating a selected electrical signal in response to a non-match therebetween;
- means for sensing the presence or absence of said selected electrical signal and for generating an unlocking electrical signal in response to the presence thereof;
- means for activating said locking means in response to the presence of said unlocking electrical signal thereby permitting manual movement of said door to said second position including means for entering said matched unlocking sequence into said used list;
- and
- means for attaching said housing to the selected member.
6 more elements
Dependencies are inferred from the claim text.