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US 4,047,409 AGranted
Key controlled lock
AssigneeAddmaster Corporation
InventorDavid W. Fuller
Life of this patent
Estimating the term…
Abstract
A key controlled lock for electrical switches, etc., in which a rotatably supported plastic switch actuator element is provided with a substantially diametrically extending keyway at one end to receive a key. Locking fingers of a plastic yieldable locking device normally engage in opposite side of the keyway. The key, upon insertion in the keyway, cams the fingers outwardly to release the actuator element for rotation by the key.
Claims8
A key controlled lock comprising
- a base structure forming a cylindrical bearing,
- an actuator rockable in said bearing,
- said actuator having a keyway extending at least substantially diametrically across one end portion thereof,
- a flexible locking element having a pair of locking fingers normally engaging in the opposite sides of said keyway to prevent rocking of said actuator member,
- means supporting said locking member eccentrically of said bearing,
- said last mentioned means preventing movement of said locking member about the axis of said bearing,
- a key insertable endwise in said keyway,
- said key having camming means thereon effective to cam said locking fingers out of said keyway and to flex said locking element upon insertion of said key in said keyway to permit rocking of said actuator member by said key.
5 more elements
A key controlled lock comprising
- a base member forming a bearing,
- an actuator member having a cylindrical section rockable in said bearing,
- said actuator member having a keyway extending at least substantially diametrically across one end portion of said cylindrical section,
- a flexible locking element have a pair of locking fingers on opposite ends thereof;
- said fingers normally engaging in said keyway on opposite sides of said cylindrical section to prevent rocking of said actuator member,
- a key insertable endwise in said keyway,
- said key having camming means thereon effective to cam said locking fingers out of said keyway and to flex said locking element,
- means on said base member for guiding said locking fingers into and out of said keyway,
- a cover member fixed relative to said base member,
- said cover member having a key slot for receiving said key and,
- means on said cover member for guiding said locking fingers into and out of said keyway,
- said key having a relieved section therein which is aligned with said key slot when said key is fully inserted in said keyway whereby to permit rotation of said actuator member by said key.
9 more elements
Dependencies are inferred from the claim text.