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US 6,666,056 B1Granted
Internal locking device for use on magazine doors
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorCraig H. Horton
Life of this patent
Estimating the term…
Abstract
An internal locking device adapted for use with the magazine doors of a weapons storage facility to lock the magazine doors and secure the facility. The internal locking device use a single key and key guide for key insertion and for reduction of key breakage. The internal locking device includes a locking bolt which when dis-engaged from the output shaft by an operator rotating the key allows the operator turn handle which turns the output shaft for the device unlocking the magazine doors.
Claims23
A method for opening magazines doors on a weapons storage facility, comprising the steps of:
- (a) rotating a handle for a security lock, mounted on one of said magazine doors, counterclockwise approximately ninety degrees, said handle being coupled to a shutter plate to rotate said shutter plate when said handle is rotated, said shutter plate when rotated exposing a lock cylinder mounted within said security lock;
- (b) inserting a key into said lock cylinder;
- (c) rotating said key counter-clockwise approximately one hundred eighty degrees after said key is inserted into said lock cylinder, said lock cylinder being connected to an eccentric cam wherein said eccentric cam rotates when said key rotates, said eccentric cam engaging a locking plate such that said locking plate moves laterally when said eccentric cam rotates, said locking plate holding an output shaft for said security lock in a fixed rotational position until said key is rotated in a counterclockwise direction to move said locking plate away from said output shaft;
- (d) pushing said handle inward to a position where a clutch connected to said handle engages the output shaft for said security lock, said handle being released from said shutter plate when said handle is pushed inward;
- and
- (e) rotating said handle counterclockwise approximately ninety degrees which rotates the output shaft for said security lock allowing a user to open the magazine doors for said weapons storage facility.
3 more elements
A lock apparatus for securing a pair of magazine doors on a weapons storage facility, comprising:
- a handle having a handle extension rotabably mounted within a door handle opening in a first magazine door of said pair of magazine doors;
- a rotatable shutter plate positioned on the inside of said first magazine door, said handle extension rotatably engaging said shutter plate when said handle is fully extended from said first magazine door;
- a retractable key having a cylindrical shaped housing and a key guide, said retractable key being adapted to fit within a cylindrical shaped opening having a slot within said first magazine door;
- a lock housing mounted on the inside of said first magazine door in alignment with said cylindrical shaped opening and said door handle opening, said housing having a back plate;
- a lock cylinder mounted within said lock housing, said lock cylinder being aligned with said cylindrical shaped opening to receive said retractable key when said handle is rotated approximately ninety degrees counterclockwise which rotates said shutter plate permitting key access to said lock cylinder;
- an eccentric cam rotatably mounted within said lock housing, said eccentric cam being connected to said lock cylinder wherein said eccentric cam rotates when said retractable key rotates within said lock cylinder;
- a locking plate slidable mounted in said lock housing, said eccentric cam engaging said locking plate such that said locking plate moves laterally within said housing when said eccentric cam rotates;
- an output shaft rotatably mounted in said lock housing, said output shaft extending from said lock housing through a shaft opening within the back plate of said lock housing, said locking plate holding said output shaft in a fixed rotational position;
- and
- a spring loaded clutch affixed to said handle extension, said spring loaded clutch having an engagement pin, said spring loaded clutch being aligned with said output shaft to move in a forward direction within said housing and engage said output shaft to permit rotational movement of said output shaft after said eccentric cam rotates in a first direction which moves said locking plate laterally away from said output shaft releasing said output shaft from said fixed rotational position.
7 more elements
A lock apparatus for securing a pair of magazine doors on a weapons storage facility, comprising:
- a handle having a handle extension rotabably mounted within a door handle opening in a first magazine door of said pair of magazine doors;
- a rotatable shutter plate positioned on the inside of said first magazine door, said handle extension rotatably engaging said shutter plate when said handle is fully extended from said first magazine door;
- a retractable key having a cylindrical shaped housing and a key guide, said retractable key being adapted to fit within a cylindrical shaped opening having a slot within said first magazine door;
- a lock housing mounted on the inside of said first magazine door in alignment with said cylindrical shaped opening and said door handle opening, said housing having a back plate;
- a lock cylinder mounted within said lock housing, said lock cylinder being aligned with said cylindrical shaped opening to receive said retractable key when said handle is rotated approximately ninety degrees counterclockwise which rotates said shutter plate permitting key access to said lock cylinder;
- an eccentric cam rotatably mounted within said lock housing, said eccentric cam being connected to said lock cylinder wherein said eccentric cam rotates when said retractable key rotates within said lock cylinder;
- a locking plate slidable mounted in said lock housing, said eccentric cam engaging said locking plate such that said locking plate moves laterally within said housing when said eccentric cam rotates;
- an output shaft rotatably mounted in said lock housing, said output shaft extending from said lock housing through a shaft opening within the back plate of said lock housing, said locking plate holding said output shaft in a fixed rotational position;
- and
- a spring loaded clutch affixed to said handle extension, said spring loaded clutch having an engagement pin, said spring loaded clutch being aligned with said output shaft to move in a forward direction within said housing and engage said output shaft to permit rotational movement of said output shaft after said eccentric cam rotates in a first direction which moves said locking plate laterally away from said shaft releasing said output shaft from said fixed rotational position;
- a door locking bolt which extends into a locking bolt receiver mounted on a second magazine door of said pair of magazine doors, said door locking bolt being retractable from said locking bolt receiver, said door locking bolt being connected to said output shaft wherein a rotation of said output shaft in a clockwise direction approximately ninety degrees causes said door locking bolt to be withdraw from said locking bolt receiver to permit an opening of the magazine doors for said weapons storage facility;
- a cam arm connected to the end of said output shaft which extends from said security lock, said door locking bolt having a substantially vertically positioned slot disposed at one end of said door locking bolt, said cam arm having a locking screw, the locking screw of said cam arm being slidably positioned within the slot for said door locking bolt;
- and
- a security alarm connected to the shutter plate for said security wherein said security alarm is de-activate prior to unlocking said magazine doors.
11 more elements
Dependencies are inferred from the claim text.